Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to

information for citizens to secure access to information under the control of public authorities,

in order to promote transparency and accountability in the working of every public authority,

and whereas the attached publication of the Bureau of Indian Standards is of particular interest

to the public, particularly disadvantaged communities and those engaged in the pursuit of

education and knowledge, the attached public safety standard is made available to promote the

timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”

Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”

Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”

Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”

Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

ह

ै

”

ह”ह

IS 8329 (2000): Centrifugally Cast (Spun) Ductile Iron

Pressure Pipes for Water, Gas and Sewage [MTD 6: Pig iron

and Cast Iron]

IS 8329 : 2000

Indian Standard

CENTRIFUGALLY CAST (SPUN) DUCTILE IRON

PRESSURE PIPES FOR WATER, GAS

AND SEWAGE - SPECIFICATION

( Third Revision)

ICS 23.040.10; 23.040.40

0 BIS 2000

BUREAU OF INDIAN STANDARDS

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

February 2000

Price Group 8

( Reaffirmed 2005 )

Pig Iron and Cast Iron Sectional Committee, MTD 6

FOREWORD

This Indian Standard (Third Revision) was adopted by the Bureau of Indian Standards, after the draft finalized

by the Pig Iron and Cast Iron Sectional Committee had been approved by the Metallurgical Engineering Division

Council.

This standard was first published in 1977 and then revised in 1990 and 1994. While revising this standard, in

light of the experience gained during these years, the committee has decided to revise this standard taking note

of the revision and publication of EN 545 : 1994 and IS0 2531 : 1998 (E).

In this revision the following main modifications have been made:

4

b)

c)

4

fl

g)

Definition of various terms have been included to avoid ambiguity;

Dimensions from DN 80 to DN 2000 have been incorporated aligning them with IS0 253 1 : 1998 (E)

and EN 545 : 1994;

Thickness of Class K7 and K8 have been increased based on current International practice and method

of production facilities in this country;

Requirements for coating and lining have been modified,

To have a proper control on the quality of the pipes, a clause on quality assurance has also been

incorporated;

The standard has been generally updated taking into account the modern trend in this respect in

other International specifications particularly the current changes made in EN 545 : 1994 and

IS0 253 1 : 1998 (E); and

As per current international practice, requirements of mass has been deleted from the standard.

Ductile iron, also called nodular iron or spheroidal graphite iron, is characterized by the presence of graphite in

nodular or spheroidal form in the resultant casting. It differs from cast iron by greater tensile strength and its

significant elongation at break. Ductile iron offers:

a)

high resistance against breakage due to impact;

b)

high tensile strength, comparable to that of mild steel so that the pipes can be used for higher working

pressure;

c)

traditional corrosion resistance, comparable to that of cast iron; and

d)

lighter in mass as compared to cast iron pipes.

In order to have International co-ordination and harmonization with other International Standards, assistance

has been derived from the following publications:

IS0 2531 : 1998(E)

Ductile iron pipes, fittings and accessories and their joints for water or gas

application, issued by the International Organization for Standardization

(ISO)

IS0 7186 : 1996(E)

Ductile iron products for sewage applications

IS0 4179 : 1985

Ductile iron pipes for pressure and non-pressure pipelines - Centrifugal

cement mortar lining - General requirements

IS0 8179-l : 1995

Ductile iron pipes - External coating: Part 1 Metallic zinc with finishing

layer

IS0 8179-2 : 1995

Ductile iron pipes - External coating: Part 2 Zinc rich paint with finishing

layer

IS0 8180 : 1985

Ductile iron pipes -Polyethylene sleeving

(Continued on third cover)

IS 8329 : 2000

Indian Standard

CENTRIFUGALLY CAST (SPUN) DUCTILE IRON

PRESSURE PIPES FOR WATER, GAS

AND SEWAGE - SPECIFICATION

( Third Revision )

1 SCOPE

1.1 This standard specifies the requirements and

associated test methods applicable to ductile iron pipes

manufactured in metal (lined or unlined) or sand

moulds and their joints for the construction of pipe

lines:

- to convey water, sewage or gas

- to be installed below or above ground

-

operated with or without pressure

NOTES

I By sand it is to be understood.sand or mineral based materials

used in foundry trade irrespective ofthe type of bonding agents.

2 All pressures are relative pressures expressed in MPa

(IMPa = 10 bar).

1.2 This standard also specifies requirements for

materials, dimensions and tolerances, mechanical

properties and standard coatings and linings of ductile

iron pipes.

1.2.1 This standard does not restrict the use of other

types of joints or future developments of other joints

as long as overall dimensions are maintained for

reasons of safety and interchangeability.

1.3 The standard applies to pipes, which are:

manufactured with socketted, flanged or spigot ends

for jointing by means of various types of gaskets, which

are not with in the scope of this standard, and normally

to be delivered externally and internally lined and are

suitable for fluid temperatures between 0°C and 5O”C,

excluding frost.

1.4 This standard does not include the provisions for

fittings used with the pipes conforming to this

standard. A separate standard IS -9523 covers the

specification on such fittings.

1.5 Fittings conforming to IS 13382 may also be used

with ductile iron pipes, when the pressure require-

ments matches.

2 REFERENCES

The following Indian Standards contain provisions,

which through reference in this text, constitute

provisions of this standard.

At the time of publication,

the editions indicated were valid. All standards are

subject to revision and~parties to agreements based on

this standard are encouraged to investigate the

possibility of applying the most recent editions of the

standards indicated below:

IS No.

455 : 1989

638 : 1979

1387 : 1993

1500 : 1983

1608 : 1995

5382 : 1985

6452 : 1989

6909 : 1990

8112 : 1989

9523 : 1980

11606 : 1986

12330 : 1988

13382 : 1992

Title

Portland slag cement (fourth

revision)

Sheet rubber jointing and rubber

insertion jointing (second revision)

General requirements for supply of

metallurgical materials (second

revision)

Methods for Brine11 hardness test for

metallic materials (second revision)

Mechanical testing of metals -

Tensile testing (second revision)

Rubber sealing ring for gas mains,

water mains and sewers Cfirst

revision)

Specification for high alumina

cement for structural use

Specification for supersulphated

cement

43 grade ordinary Portland. cement

(first revision)

Ductile iron fittings for pressure

pipes for water, gas and sewage

Methods of sampling of cast iron

pipes and fittings

Sulphate resisting Portland cement

Cast iron specials for mechanical

and push-on-flexible joints for

pressure pipelines for water, gas and

sewage

3 TERMINOLOGY

3.0 For the purpose of this standard, the following

definitions shall apply:

3.1 Ductile Iron

- Type of iron used for pipes, in

which graphite is present primarily in spheroidal or

nodular form.

3.2 Pipe-

Casting of uniform bore, straight in axis,

having either socket, spigot or flanged ends.

IS8329:2000

3.3 Fitting

-Casting other than a pipe which allows

pipeline deviation, change of direction of bore. In

addition flanged-sockets, flanged-spigots and collars

are also classified as fittings.

3.4 Accessory -Any item other than a pipe or fitting

which is used in a pipeline, such as:

- glands and bolts for mechanical flexible

joints;

- glands, bolts and locking rings or segments

for restrained joints.

NOTE - Valves and hydrants ofall types are not covered by the

term accessory.

3.5 Flange - Flat circular end of a pipe or fitting,

extending perpendicular to its axis, with bolt holes

equally spaced on a circle.

NOTE -A flange may be integrally cast, threaded-on or welded-

on or adjustable; an adjustable flange comprises a ring, in one or

several parts bolted together, which bears on an endjoint hub and

can be freely rotated around the pipe axis before jointing.

3.6 Spigot - Male end of a pipe or fitting.

3.7 Socket - Female end of a pipe to make the joint

with the spigot of an adjacent component.

3.8 Gasket - Sealing component of a joint.

3.9 Joint - Connection between the ends of pipes in

which a gasket is used to effect a seal.

3.10 Flexible Joint

- Joint which provides

significant angular deflection and movement parallel

and/or perpendicular to the pipe axis.

3.11 Push-on Flexible Joint - A flexible joint in

which an elastomeric gasket is located in the socket

and the joint assembly is effected by entering the spigot

through the gasket into the socket.

3.12 Mechanical Flexible Joint - Flexible joint in

which sealing is obtained by applying pressure to the

gasket by mechanical means, for example a gland.

3.13 Restrained Joint

- Joint wherein a means is

provided to prevent separation of the assembled joint.

3.14 Flanged Joint - Joint between two flanged

ends.

3.15 Nominal Size (ON) - Numerical designation

of size which is common to all components in apiping

system. It is a convenient round number for reference

purposes and is only loosely related to manufacturing

dimensions.

3.16 Nominal Pressure (PiV) - A numerical

designation expressed by a number which is used for

reference purposes. All components of the same

nominal size DN designated by the same PN number

have compatible mating dimensions.

3.17 Allowable Operating Pressure (AOP) -

Internal pressure, excluding surge, that a component

can safely withstand in permanent service.

3.18 Allowable Maximum Operating Pressure

(MOP) -

Maximum internal pressure, including

surge, that a component can safely withstand in

service.

3.19 Allowable Site Test Pressure (STP) -

Maximum hydrostatic pressure that a newly installed

component can withstand for a relatively short

duration, when either fixed above ground level or laid

and backfilled underground, in order to measure the

integrity and tightness of the pipeline.

NOTE - This test pressure is different from the system test

pressure, which is related to the design pressure ofthe pipeline

and is intended to ensure its integrity and leaktightnens.

3.20 Batch - Quantity of castings from which a

certain number of samples may be taken for testing

purposes during manufacture.

3.21 Length - Effective length of a pipe, as shown

on the drawings of Table 2.

NOTE - For flanged pipes, the effective length is equal to the

overall length and is noted L. For socketted pipes, the effective

length is equal to the overall length minus the spigot insertion

depth.

3.22 Ovality - Out of roundness of a pipe section; it

is equal to lOO{(A,-A,)l(A,+A,)}, where A,, is the

maximum axis and A, the minimum axis of the pipe

cross-section.

4 CLASSIFICATION

4.1 Pipes have been classified as K7, K8, K9, KIO,

K12,...

depending on service conditions and

manufacturing process.

4.2 The class designation shall comprise of:

a) a prefix K.

b) a whole number used for thickness class

designation, [this is the selected coefficient

inserted into the equation (1) in 4.3

depending on the service conditions].

4.3 The wall thickness of pipe ‘e’ in mm shall be

calculated as a function of the nominal diameter by

the following equation with minimum of 5 mm for

K=7,6mmforK=8and7mmforK=12.

e = K (0.5 + 0.001 Oh')

. . . (1)

where

e

= wall thickness in mm,

DN = the nominal diameter, and

K = the whole number coefficient.

2

4.4 The value of K will depend on the following service

conditions:

Service Conditions

Nominal

Water

Sewers

Gas Mains

Dia

Main

80- 300 K9-K12

K7-K12 K9-K12

350 - 600 K8 - KlO K7 - KlO K9-KlO

700 -2 000 K7 - KlO K7-KlO K9 - KlO

4.5 For screwed or welded eon flange pipes the

minimum classes as per working pressure criteria are

given below:

IS 8329 : 2000

4.5.1 Flanges for screwed on or Welded on Double

Flanged Pipes should be preferably of Ductile Iron

of 420 MPa minimum tensile strength and

5 percent minimum elongation at break and maximum

hardness 250 HB.

4.6 Where pipes of classes other than those given in

Table 1 are manufactured and supplied, the wall

thickness shall be calculated as per formula (1) given

in 4.3 and the pipes shall be marked in accordance

with 17. Such pipes shall comply with all the

requirements of this standard with the exception of

wall thickness ‘e’ which will be as per the calculated

wall thickness.

Minimum Class for Ductile Iron Flanged Pipes

Nominal

Dia

Screwed on Flange

Minimum

Welded on Flange

Minimum

PN 10 PN 16 PN25 PN 40 PN 10 PN16 PN25 PN 40

80 - 450 K9 K9 K9 K9 K9 K9 K9 K9

500 - 600 KlO KlO KlO KlO K9 K9 K9 KlO

700 -1 200 KIO KlO KlO - K9 K9 K9 -

1 400 -2 000 Klb KlO - - K9 K9 - -

5 SUPPLY OF MATERIAL

The general requirements relating to the supply of

material shall be as laid down in IS 1387.

type or flanges may be welded on plain ended ductile

iron pipes.

6 JOINTS

The joint design and gasket shape are outside the scope

of this standard.

6.2.3 In case of ductile iron pipes with screwed on

flanges or welded flanges, the flanges shall be at right

angle to the axis of the pipe and shall be machined on

face. The bolt holes shall be either cored or drilled.

6.1 Push-on-Joint

6.1.1 In case of push-on flexible joints, the spigot

ends shall be suitably chamfered or rounded off to

facilitate smooth entry of pipe in the socket fitted with

the rubber gasket.

6.2.4 The bolt hole circle shall be concentric with the

bore and holes of the two flanges of the pipe shall be

correctly aligned.

6.1.2 For high pressure mains where working pressure

isgreater than 2.4 MPa, suitable flexible joint may be

preferred when the joint is restrained against axial

movement.

6.2.5 The flange can be of adjustable type where the

flange comprises of a ring, in one or several parts

assembled together, which bears on an end joint hub

and can be freely rotated around the pipe axis before

jointing.

6.2 Flanged Joint

6.2.1 The dimensions and tolerances of the flanges

of pipes and fittings shall be such, so as to ensure the

interconnection between all flanged components

(pipes, fittings. valves) of the same DN and PN and

adequate joint performance. Although it does not affect

interconnection, the manufacturer shall indicate

whether his products are normally delivered with fixed

flanges or loose flanges.

6.2.6 The ductile iron pipes having screwed on flanges

shall be sealed at the threaded joint between the pipe

and theflange by a suitable sealing compound. Unless

otherwise specified, the sealing compound~applied to

the threaded joint shall be suitable for use with ‘raw’

and~potable water (up to a temperature of 1 OO’C), gas

and normal domestic sewage.

Alternative types of sealing compound, for pipes used

for other duties such as carrying industrial effluents,

chemicals and town gas, shall be compatible and may

be the subject to agreement between the manufacturer

and the purchaser.

6.2.2 Flanged joints for working pressure ratings of

6.2.7 For screwed on flanged pipes, the method of

1.0, 1.6,2.5 and 4.0 MPa may be of screwed onflanged

screwing and the exact form of thread are left to the

3

IS 8329 : 2000

discretion of the manufacturer in view of the fact that

flanges are never removed after screwing on the barrels

of the pipes.

6.2.8 Dimensions of screwed on flanges and welded

on flanges for ductile iron pipes shall conform to the

requirements of Tables 3, 4, 5 and 6.

7.3 Pipes centrifugally cast shall be heat-treated in

order to achieve the necessary mechanical properties

and to relieve casting stresses caused due to the method

of manufacture and repair work.

7.3.1 If necessary the pipes may be subjected to

reheat treatment to ensure that Brine11 hardness does

6.3 Flexible Joints and Interconnection

not exceed the specified value and the other mechanical

properties specified in the standard are achieved.

Pipes with flexible joints shall be in accordance

with 15 of this standard for their spigot external

8 RUBBER GASKET

diameters DE and their tolerances. This provides the

possibility of interconnection between components

8.1 Rubber gaskets used with push-on-joints or

equipped with different types of flexible joints.

mechanical joints shall conform to IS 5382.

NOTES

8.2 Material of rubber gaskets for push-on mechanical

or flanged joints shall be compatible with the fluid to

be conveyed at the working pressure and temperature.

1 For interconnection with certain types ofjoints operating within

a tighter tolerance range on DE, the manufacturer’s guidance may

be followed as to the means ofensuringadequatejoint performance

up to the highest pressures (for example, measurement and

selection ofextemal diameter).

8.3 Rubber gaskets for mechanical joint for conveyance

of town gas may be suitably protected so that the

elastomer does not come in direct contact with the

gas.

2 For interconnection with existing pipelines, which may have

external diameters not m compliance with 15, the manufacturer’s

guidance may be followed as to the appropriate means of

intkrconnection (for example, adaptors).

6.4 Restrained Joints

The design of restrained joints for ductile iron pipelines

and its requirements shall be subject to agreement

between the purchaser and the manufacturer as agreed

at the time of enquiry and order. Their spigot external

diameters DE and their tolerances shall be in accordance

with requirements of 15.

7 MANUFACTURE

7.1 The metal used for the manufacture of pipes shall

be of good quality, commensurate with the mechanical

requirements laid down in 10. It shall be manufactured

by any method at the discretion of the manufacturer

provided that the requirements defined in this standard

are complied with.

8.4 Rubber gaskets for use with flanged joints shall

conform to IS 638.

8S’While conveying potable water the gaskets should

not deteriorate the quality of water and should not

impart any bad taste or foul odour.

9 SAMPLING

9.1 Sampling criteria for various tests, unless specified

in this standard, shall be as laid down in IS 11606.

9.2 The mechanical acceptance tests shall be carried

out on samples of ductile iron pipes which shall be

grouped in following batch sizes.

DN (mm) Maximum Batch Size

80- 250 200 Pipes

300- 600 100 Pipes

7.2 The pipes shall be stripped with all precautions to

700 - 1 000 60 Pipes

avoid warping or shrinkage defects, detrimental to

1 100 - 1 400

40 Pipes

their good quality. The pipes shall be sound and free

1 600 - 2 000

30 Pipes

from surface or other defects. Pipes showing small

imperfections inherited with the method of manu-

9.3 In order to check compliance with the requirements

facture, and which do not affect their serviceability,

specified in 10, a sample ring or bar shall be taken

shall not be rejected on that account alone. Minor

from the spigot end of pipe.

defects arising out of manufacturing process may be

rectified, for example, by welding in order to remove

surface imperfections and localized defects which do

not affect the entire wall thickness provided that the

repairs are carried out in accordance with a written

assurance system and the repaired pipes comply with

all the requirements of classes K9 and KlO with the

approval of the purchaser.

10 MECHANICAL TESTS

10.1 Mechanical tests shall be carried out during

manufacture. One test shall be conducted for every

batch of production. The number of pipes for each

batch shall be as laid down in 9.2. The results

obtained shall be taken to represent all the pipes of

that batch.

4

IS 8329 : 2000

10.1.1 Tensile Test

of the test bar shall be as given below:

10.1.2 The thickness of the sample and the diameter

Castings Test Bar, Method A Test Bar, Method B

Thickness

mm

Centrifugally Cast

Pipes:

Nominal Diameter _

mm

Nominal Area S,,

mm*

Nominal Diameter

mm

Tolerance on

Diameter

mm

- less than 6 2.5 5.0 2.52 0.01

- 6 up to but not 3.5 10.0 3.57 0.02

including 8

- 8 up to but not 5.0 20.0 5.05 0.02

including 12

- 12 and over 6.0 30.0 6.18 0.03

10.1.3 A sample shall be cut from the spigot end of

the pipe. This sample may be cut perpendicular to or

parallel with the pipe axis, but in case of dispute the

’ para!lel to axis sample shall be used.

10.1.4 Test Specimen

A test bar shall be machined from each sample to be

representative of the metal at the mid-thickness of the

sample, with a cylindrical part having the diameters

given in 10.1.2.

The test bars shall have a gauge length at least five

times the nominal test bar diameter. The ends of the

test bars shall be such that they will fit the testing

machine.

Two methods of measuring the tensile strength may

be used at the manufacturer’s option:

Method A -- Machine the test bar to its nominal

diameter *lo percent, measure the actual diameter

before the test with an accuracy of 0.01 mm and use

this measured diameter to calculate the cross-sectional

area and the tensile strength; or:

Method B - Machine the test bar to its nominal area

S, within a specified tolerance on diameter (see 10.1.2)

and use the nominal area to calculate the tensile

strength.

10.1.5 Equipment and Test Method

The samples shall be tested as per procedures laid

down in IS 1608. The tensile testing machine shall

have suitable holders or grips to suit the test bar ends

so as to positively apply the test load axially.

10.1.6 Test Results

Test results shall comply with the requirements given

below:

One test pieces obtained by cutting bars from spigot

5

end of one pipe selected for testing when tested in

accordance with the methods specified in 10.1.4 shall

satisfy the following requirements:

Nominal Minimum Tensile Minimum

Diameter Strength Elongation

(DN) mm MPa at Break, Percent

80 _ 1 000 420 10

1100-2000 420 7

NOTES

1 The 0.2 percent proof stress shall be measured when agreed to

between the manufacturer and the purchaser at the time ofenquiry

and order. It shall not be less than 300 MPa.

2 For ductile iron pipes upto DN I 000 ifthe tensile strength of

specimen is not found within limits, and microstructure reveals

75 percent ferrite with spheroidal graphite and percentage

elongation 5 7, it shall be taken as meeting the requirements of

this standard.

3 For pipes of size not less than DN 900, 0.2 percent proof

stress Z 270 MPa is permitted provided that elongation at break

is not less than 12 percent.

4 The frequency oftesting is related to the system of production

and quality control used by the manufacturer.

10.1.7 All pipes from which bars have been cut shall

be accepted by the purchaser as complete lengths.

10.2 Brine11 Hardness Test

When tested in accordance with IS 1500, the Brine11

hardness shall not exceed 230 HB on the external

un-machined surface.

10.3 Retest

10.3.1 If test piece representing a batch (see 9.2) fails

in the test in the first instance, two additional tests

shall be made on test pieces selected from two other

pipes from the same batch. If both the test results

satisfy the specified requirements, the batch shall be

accepted. Should either of these additional test pieces

fail in the test, the batch shall be deemed as not

complying with this standard.

IS 8329 * 2V’O . Y

10.3.2 If test results do not satisfy the requirements

of 10.1.6 the manufacturer shall:

In the case where the metal doss not achieve the

required mechanical properties, investigate the reason

and ensure that all castings in the batch are either re-

heat treated or rejected.

NOTE -- If sufficient evidence is available that the failure ofthe

sample can be attributed to defect in test bar, fresh sample may be

drawn and tested. If It passes. the batch is accepted; if not the

manufacrurer has the option to proceedas in 10.3.2.

11 HYDROSTATIC TEST

11.1 All pipes shall be tested hydrostatically at a pressure

specified in Table 1. To perform the test, pressure shall

be applied internally and shall be steadily maintained

for a period of 10 s. The pipes shall withstand the

pressure test and shall not show any sign of leakage,

sweating or other defects of any kind.

11.1.1 It is recommended that the Hydrostatic test

pressure at works ‘p’ be expressed in MPa as a function

of the coefficient K (4.3) be calculated using the

following formulae:

for DN

80 to 300 p = 0.05 (K + 1)2

for DN 350 to 600 p = 0.05 (K)2

for DN 700 to 1 000

p = 0.05 (K- I)*

for DN 1 lOOto ~=0.05(K-2)~

11 .1.2 When pipes are required to be tested for higher

pressure, the test pressures are subject to agreement

between the purchaser and the manufacturer at the

time of enquiry and order.

11.2 Test shall be carried out before the application of

surface coating and lining.

12 SIZES

12.1 The standard nominal diameters DN, of pipes

and flanges followed in this standard are as follows :

80, 100, 125, 150,200,250,300,350,400,450,

500, 600, 700, 750, 800, 900, 1000, 1 100,

1 200, 1 400, 1 600, 1 800 and 2 000 mm.

12.2 Critical dimensions for socket and spigot of pipes

for push-on flexible joints and mechanical joints for

classes K7, K8, K9 and KlO are given in Table 2.

12.3 Dimensions of flanged pipes centrifugally cast

with screwed on flanges or welded flanges are given

in Tables 3, 4, 5 and 6.

13 DIMENSIONS

13.1 Length

The standard working length of socket and spigot pipes

shall be 4 m, 5 m, 5.5 m and 6 m and for flanged pipes

shall be 4 m, 5 m and 5.5 m other lengths are available

by agreement between the manufacturer and the

purchaser.

13.2 Internal Diameter

The nominal values of the internal diameters of

centrifugally cast pipes, expressed in millimetres are

approximately equal to the numbers indicating their

nominal sizes DN.

13.3 Wall Thickness

The nominal wall thickness of pipes shall be calculated

as a function of the nominal size. DN, as given in the

formula (1) in 4.3. The different nominal wall

thickness are given in Table 2. Other thickness and

class are possible for pipes by agreement between the

manufacturer and the purchaser.

14 MATERIALS IN CONTACT WITH POTABLE

WATER

When used under the conditions for which they are

designed, in permanent or in temporary contact with

water intended for human consumption, ductile iron

pipes and their joints shall not have detrimental effects

on the properties of the water for its intended use.

Table 1 Hydrostatic Test Pressure at Works for Ductile Iron Pipes

(Clauses 4.6 and 11.1)

Nominal

Minimum Hydrostatic Test Pressure at Works . MPa

Diameter (DA’)

-

mm

Centrifugally cast pipes with

Pipes with screwed 0;

flexible joints welded-on flanges

Class A7

Class KS Class K9, PNIO PN16

PN25

PN40

Class KIO, Flange

Flange Flange Flange

Class K12

(1)

(2) (3) (4)

(5) (6)

(7) (8)

80 to 300 3.2 4.0 5.0 1.6 2.5 3.2 4.0

350 to 600 2.5 3.2 4.0 1.6 2.5 3.2 4.0

7OG to 1 000 1.8 2.5 3.2 1.6 2.5 3.2 -

! looto2ooo I .2 1.8 2.5 1.6 2.5 2.5 -

NOTE -~ Recommended hydrostatic site test pressure and hydraulic working pressure are given in Annex E.

6

1s 8329 : 2000

Table 2 Dimensions of Sockets and Spigot Pipes, Classes K7, KS, K9 and X10

(Clauses 3.21, 12.2, 13.3 and 15.3.2)

DE

a,

Nominal

Diameter

DN

External

Diameter

DE

80 98

100 118

125 144

150 170

200 222

250 274

300 326

350 378

400 429

450

480

500 532

600 635

700

738

750

790

800

842

900

945

1000 1 048

1 100 1 152

I 200 I 255

I 400

I 462

I 600 1 668

I 800 I 875

2 000

2 082

All dimensions in millimetres.

Barrel Wall Thickness

‘0’ r

K-7 K8

5 6

5.3 6

5.6 6.4

6.0 6.8

6.3

7.2

6.6 7.6

7.0

8.0

7.7

8.8

9.0 9.6

9.7 10.0

10.4 10.4

11.2

12.0 12.0

14.4

15.3

17.1 17.1

18.9

20.7 20.7

22.5 22.5

c

K9

6.0

6.3

6.8

7.2

7.7

8.1

8.6

9.0

9.9

10.8

11.3

11.7

12.6

13.5

14.4

15.3

17.1

18.9

20.7

22.5

KIO

6.0

6.1

6.3

6.5

7.0

7.5

8.0

8.5

9.0

9.5

10.0

11.0

12.0

12.5

13.0

14.0

15.0

16.0

17.0

19.0

21.0

23.0

25.0

NOTE - For tolerances refer to 15.

IS 8329 : 2000

Table 3 Dimenshs of Standard Flange Drilling for Screwed Flanges and

Welded Flange (PA’ 10)

(Clauses 6.2.8 and 12.3).

All dimensions in millimetres.

Nominal

Dimensions Holes Bolt

Diameter

Slu

DN D

E

C b

/ a

S

Number

Dia (d)

MCbiC

80

200 132 160 I9 3 32 I5

4 I9 Ml6

100

220 156 180 19 3 32 15

8 19 Ml6

I25

250 184 210 I9 3 32 I5

8 I9 Ml6

I50

285 211 240 I9 3 32 I5

‘8 23 M20

200

340 266 295 20 3 34 I5

8 23 M20

250

395 319 350 I 22 3 48 I6

12 23 M20

300

445 370 400 24.5 4 52 17.5

I2 23 M20

350

505 429 460

I

24.5 4 52 19.5

I6 23 M20

400

565 480 515 24.5 4 60 19.5

16 28 .M24

450

615 530 565 25.5 4 63 20

20 28 M24

500

670 582 620 26.5 4 68 21

20 28 M24

600

780 682 725 30 5 75 24

20 3’1 M27

700

895 794 840 32.5 5 24

750

960”

82

24 31 M27

857 900 34 5 87 2-t

24 31 M27

800

1015 901 950 35 5 90 24.5

24 34 M30

900

I II5 1001 I 050 37.5 5 98 26.5

28 34 M30

I 000

I 230 I II2 I 160 40 5‘ I05 28

28 37 M33

I 100

I 340 1231 1270 43 5 II4 30

28 37 h433

I 200

I 455 I 328 I 380 45 5 120 31.5

32 40 M36

I 400

I 675 I 530 I 590 46 5 123 32

36 43 M39

I 600

I915 I 750 I 820 49 5 132 34.5

40 49 M45

I 800

2 115. I 950 2 020 52 5 I41 36.5

44 49 M45

2000

2 325 2150 2 230 55 5 I50 38.5

48 49 M45

NOTES

t The method ofscrewing and the exact form of thread shall be left to the discretion ofthe manufacturer as the flanges are never removed

aRer screwing on the barrels oftbe pipes.

2 Ifso required the screwed flanges may be spot welded on the back side after screwing.

3 Dimensions ‘a’ and’S;are for guidance only.

4 Unless otherwise specified, flanges shall be ofductile iron.

Table 4 Dimen$ions of Standard Flange Drilltag for Screwed Flanges and

Welded Flange ~(PN 16)

(Clauses 6.2.8 and 12.3)

Nominal

Diameter

DN

r

80

100

125

150

200

250

300

350

400

450

500

600

700

750

800

900

;t

1200

1400

I600

1800

2 000

NOTES

d

D

-

&

c b

200 132

160

19

220 156’ 180 19

250.

,184

210

19

285

211 240 19

340

266 295

20

400 31.9

355 22

455

370

410

24.5

520 429

470

26.5

580 480.

525 28

640 548

585 30

715

609

650 31,5

840 _

720 770

36

910 794

840 39.5

970 857

900

41

1 025 901

950

43

1 125

1001

I OS&

46

1 255

1112

1 170 50

I 355

1218

I 270 53.5

1485

1328

I 390 57

1685 1 530

1 590

60

I 930 1 750

1620

65

2 130 1 950

2 020

70

2 345

2 150 2 230

75.

Dimensions

‘T-

-I-

3

3-

3

4

5

-

a

32

34

48

52’

68

72

78

82

93

103

108

114

124

135

144

156

165

180

195

210

s

NUmba

I5

8

15

8

15

8

15

‘8

16

12

17.5 12

‘19.5 12

21

16

22.5

16

24

20

25 20

27.5

20

27.5

24

28

24

30 24

32.5 28

35 28

37.5 32

40

32

42

36

45.5 40

49

44

52.5

48

r

L

Dia (d)

19

23

28

::

31

34

37

:a..

ai

40

43

49

56

J

MChiC

Ml6

M20

fW

M24

.M27

Mz?

g;.

M33

M36

.h436

M39

!z

h&s

-f&32

-M52,

-MS6

1 The method of screwing and the exact form of thread ,shrdl be IeD to the discretion of the manufrctunrW the flanges * ~nmdved

after screwing on the barrels ofthe pipes.

2 If so required the screwed flanges may be spot welded on the back side after screwing.

3 Dimensions ‘0’ and’s’ are for guidance only.

4 Unless otherwise specifkd, flanges shall be ofductile iron.

9

IS 8329 : 2000

Table 5 Dimensioni of Standard FlangeDrilling for Screwed Flanges’and

Welded Flange (PN 25)

(Clhuses 6.2.Ihzd12.3)

All dimensions in millimetms.

Nominal. Dimensions HOkS Bolt

Diameter

Slxe

DN. D

E

’ c

b

f

a s

Numba Dia (d) Metric

80

200 132 160 19 3 30

15 8 19 Ml6

100

235 156 190 19 3 33

is 8 23 Ii420

125

270 184 220 3 37

IS 8 28 M24

150

300 211 250

:‘o

3 40

16 8 ‘28 M24

200

360 274 310 22 3 44

17.5 12 28 M24

250

425 330 370 24.1 3 49

19.5 12 31 M27

300

485 389 430 27.5 4 56

22 16 31 M27

350

555 448 490 30 4 57

24 16 34 M30

400

620 503 550 32 4 64

25.3 16 37 M33

450

670 548 600 34.5 4 69

27.5 20 37 M33

500

730 609 660 36.5 4 73

29 20 37 M33

600

845 720 770 42 5 83

33.5 20 40 M36

700

960 820 875 46.5 5 -. 84

33.5 24 43 M39

750

-I 020 883 940 50 5 100

34 24 43 M39

800

I 085 928 990

::5

5 102

35.5 24 49 M45

900

I 185 I 028 1090 5 112

39 28 49 M45

1000

I 320 I 140 1210 60‘ 5 118

42 28 56 MS2

I loo

1420 I 240 1310 65.5 5 120

45 32 56 M52

I 200

1 530 I 350 1420 69 5 138

48.5 32 56 MS2

1400

1755 1560 1640 74 5 148

52 36 62 M56

1600

1975 1730 1860 81 5 162

” 56.5 40 62 MS6

I 800

2 195 I 980 ‘2070 88 5 176

61.5 44 70 M64

2 000

2,425 2 210 2300 95 5. 190

66.5 48 70 . M64

NOTES

I The method of screwing and the exact form of thread shall be left to the discretion of the manufacturer as the flanges are. neverremoved

after screwing on the barrels of the pipes.

2 If so required the screwed flanges may be spot welded on the back side after screwing.

3 Dimensions ‘a’ and~=r’ are for guidance only.

4 Unless otherwise specified, flanges shall be of ductile iron.

10

Table 6 Dimensions of Standard Flange Drilling for Screwed Flanges and

Welded Flange (PN 40)

(Clauses 6.2.8 and 12.3)

Nominal

.Diameter

DN D E c

b

80 200 132 160

I9

100 235 156 190

I9

125 270 184

220 23.5

150 300 211 250

26

200 375 284 320

30

250 450 345 385

34.;

300 515

409 450 39.5

350 580 465

510 44

400

660 535

585 48

450

685 560

610 50

400 /

755 615

670

52

600 890

735

795’ 58

NOTES

All dimensions in millimetres.

T

f

-

3

4

5

a S

Number Dia (d)

43

48

51

52

62

67

73

76

83

z;

106

I5

8

I9

Ml6

15 8 23 M20

16.5 8 28 M24

18 8 28 hG?4

21 12 31 M27

24 12

34

M30

27.5

1~6 34 M30

31 I6 37 M33

33.5 16

40

M36

35 20

40

M36

36.5 20 43 M39

40.5

20 49

M45

HOkS Bolt

size

Metric

1 The method of screwing and the exact fo? of thread shall be left to the discretion of the manufacturer as the flanges are never removed

after screwing on the barrels of the pipes.

2 Ifso required the screwed flanges may be spot welded on the back side’after screwing.

3 Dimensions ‘a’ and?&re forguidance only.

4 Unless otherwise specified, flanges shall be ofductile iron.

11

IS8329:2000

15 TOLERANCES

15.1 Diameter

15.1.1 External Diameter

The values of the external diameter (DE) of the spigot

end of socket and spigot pipes and when measured

circumfetentialiy using a diameter tape shall confirm

to the requirements specified in 12. The positive

tolerance is + 1 mm and applies to all thickness classes

of pipes.

The negative tolerance of the external diameter depends

on the design of each type of joint and maximum

negative tolerance is specified in this standard.

Table 7 External Diameter DE (mm)

(Clause 15.1.1)

DN

Nominal

(1) (2)

80

98

100 118

125 144

150 170

200 222

250 274

300 326

350 378

400 429

450 480

500

532

600

635

700 738

750 789

800 842

900 945

1 000 k 048

I 100

1 152

I 200 1255

I 400 1462

1 500

1 565

I 600 1 668

I 800

I 875

2 000 2 082

Tolerance

(3)

+1,-2.2

+I,-2.8

+A, -2.8

+1,-2.9

+1, -3

+1,-3.1

+1, -3.3

+1, -3.4

+1,-3.5

+I, -3.6

+I,-3.8

+1,-I

+1,-4.3

+1, -4.4

+1,-4.5

+I, -4.8

+1,-s

+1,-6

+1, -6.2

+1,-6.6

+1,-7

+1,-7.4

+I,-8.2

+1,-g

15.1.2 For requirement of interchangeability all pipes

should be within the tolerance specified. Push-on

flexible joints may need closer tolerance for its effective

performance. Such tolerance should be specified by

the -manufacturer for the type ofjoint and the nominal

size considered, if required, in their catalogue.

15.1.3 In addition, the ovality (see 3.22) of the spigot

end of pipes shall:

-

remain within the tolerances on DE for

DN 80 to 200;

- not exceed I percent for DN 250 to DN 600

or 2 percent for DN above 600.

NOTE -The manufacturer’s guidance will be followed as to

the necessity and means of ovality correction; certain types of

flexible joints can accept the maximum ovality without need tbr

spigot re-rounding prior to jointing.

15.2 Up to size DN 300 the external diameter of the

barrel of pipes supplied shall be within the tolerance

specified, starting from spigot end of pipe to the section

at one metre from it so that the pipe can be cut and the

short length can be used.

15.2.1 Above size DN 300 subject to the agreement

between the purchaser and the manufacturer some of

the pipes may be ordered in accordance with 15.2.

These pipes may be especially marked by a continuous

longitudinal line. Such pipes so specially supplied may

be cut and used as short length pipes.

15.3 Tolerance on Ovality

15.3.1 Pipes shall be as far as possible circular

internally and externally. The tolerance for out-of-

roundness of the socket and spigot ends in the jointing

zone for push-on-joint is given in Table 8 and for

mechanical joint is given in Table 9.

15.3.2 In case of oval spigot ends for push-onjoints

(DE), the minor axis is permitted to be less than the

minimum allowable diameter by the value given below

provided the mean diameter DE measured by

circumferential tape, comes within the minimum

allowable dimensions of DE (Table 2) after applying

the tolerance.

Table 8 Allowable Ova&y for

Push-on-Joint Pipes

(Clause 153.1)

Nominal Diameter Allowable Difference Between

DN

Minor Axlb and DE, Min

mm

(1)

(2)

80 to 300

I.0

350 to 600

1.75

700

2.0

750 to 800

2.4

900 to 1 000

3.5

1100to1200 4.0

1 400 to 1 600 4.5

15.3.3 Mechanical joint will accept some degrees of

spigot ovality but the measured difference between the

maximum and minimum axis of individual spigots

shall not exceed the values given in Table 9.

15.4 Tolerance on Thickness

Thk tolerance on the wall thickness (e) and the flange

thickness (6) of the pipes shall be as follows:

Dimensions.

Tolerancepm

i) Wall thickness (e) - (1.3 + 0.001 DN)‘)

ii) Flange thickness (b) i-(2 + 0.05b)

I) The tolerance given is subject to minimum thickness against

classes KI, Kt? and Kl2 given in 4.3. No limit for the plus

tokrance is specified.

12

Table 9 Allowable Ovality for Mechanical

Joint Pipe

(Clauses 15.3.1 and 15.3.3)

Nominal Diameter

Maximum Ovality of Spigot of

DN External Diameter DE

mm mm

(1) (2)

80to 150

5

200 to 350

IO

400 to 500 20

600 to 800

30

900 to I 000

40

I loot0 1400

50

I 600 to ,2 000

60

15.5 Tolerance on Length

The tolerance on length of pipes shall be as follows:

Type of Casting Tolerance

mm

i) Socket and spigot and plain

f 100

ended pipes

ii) Flanged pipes

f 10

15.5.1 Of the total number of socket and spigot pipes

to be supplied in each diameter, the manufacturer may

supply up to 10 percent in length shorter than the

specified length as follows:

Specified Length Decrease in Length

m

i) Up to 4

0.5, 1

ii) Over 4

0.5, 1, 1.5, 2

15.6 Permissible Deviation from a Straight Line

The pipes shall be reasonably straight. When the pipe

is rolled along gantries, separated by distance

approximately two-thirds the length of the pipe to be

checked, the maximum deviation from a straight line

in mm shall not be greater than 1.25 times the

IS 8329 : 2000

length L, in metres of the pipe; thus:

f, <1.25xL

where

fm

= maximum deviation from straight line, and

L = length of the pipe.

15.7 Flanges

15.7.1 Tolerances for the various dimensions of

flanges shall be as given in Tables 10, 11, 12 and 13.

16 COATING

16.1 Pipes shall be normally delivered internally and

externally coated.

16.2 External Protection

By agreement between manufacturer and the

purchaser, any one ofthe following protection may be

applied depending upon the external condition of use:

‘Metallic zinc with finishing layer as included

in Annex A.

Zinc rich paint with finishing layer, as

included in Annex A.

Bituminous paint: as included in Annex C.

External Sleeving (Annex D).

NOTE -Unless and until agreed to between the purchaser and

manufacturer the requirement of coatings and sleeving shall

comply with the rcquinments contained in this standard.

16.2.1 The polyethylene sleeves may be supplied, for

encasement of the pipes at site, along with the pipes if

ordered by the purchaser at the time of enquiry and

order. This encasement shall so designed that prevent

contact between pipe and the surrounding backfill and

bedding material. Details as given in Annex D.

16.3 Internal Linings

By agreement between manufacturer and the

purchaser, the following lining may be applied

depending on the internal conditions of use:

Table 10 Tolerances on-the External Diameter ‘D and E’

(Clause 15.7.1)

DN

Tolerance on D

Tolerance on E

DN

Tolerance on D

Tolerance on E

80 100 I25 150 1 200 1 250 300 350 1 400 1 450 1 500 1 600 700 750

f 4.5 +5.5, -2.5 + 6.5, -3.5 + 7.5, -4

l 4

l 4.5 *5 as.5

800 900 1000 1100 1200 1400 1600 1800 2000

+ 7.5, -4 + 8.5, A +10, -5 +12,-6

f 5.5 f 5.5 f 6.0 f 6.0

13

IS 8329 : 2000

- Portland cement (with or without additives)

mortar, as included in Annex B.

- Blast furnace slag cement mortar as included

in Annex B.

- High alumina (calcium aluminate) cement

mortar as included in Annex B.

- Cement mortar with seal-coat: as included

in Annex B.

Bituminous paint as included in Annex C.

NOTE - Unless and until agreed to between the purchaser and

the manufacturer, the requirement of internal lining shall comply

with the requirements contained in this standard.

Table 11 Tolerances on Raised Face Height v)

(Clause 15.7.1)

All dimensions in millimetres.

Height of Raised Face v)

Tolerance

(I)

(2)

3

+I 5, -2.0

4

+2, -3.0

5

+2.5,+.0

Table 12 Tolerances on Thickness on Flange (b)

(Clause 15.7.1)

All dimensions in millimetres.

Type of Flange Tolerance

(1)

(2)

Integrally cast flanges

f (3 + 0.05 fr)

Welded and screwed on flanges

* (2 + 0.05 b)

Table 13 Tolerances on Flange Drilling

(Clause 15.7.1)

All dimensions in millimetres.

Dimension

Bolt Hole Diameter, Tolerance

---

19to28

31 to56

Above 62

(1)

(2) (3)

(4)

Bolt hole diameter, d

+2,-o +3,-o

+-4, - 0

~Pitch circte diameter, C

f 2

* 2.8

f 4.8

Centre to centre of

adjacent bolt holes *2 f 2.8 zk 4.8

17 QUALITY ASSURANCE

17.1 General

The manufacturer shall be able to demonstrate the

conformity of the product to the requirement contained

in this standard by controlling the manufacturing

process and by carrying out the various tests as

specified in this standard.

17.2 Quality Assurance System

The manufacturer shall control the quality of the

product during their manufacturing process by a

system of process control in order to comply with the

technical requirements contained in this standard.

Wherever possible, statistical sampling techniques

should be used to control the process so that the product

is produced within the specified limits.

18 MARKING

18.1 Each pipe shall have as cast or stamped or legibly

and indelibly painted on it with the following

appropriate marks:

a)

b)

c)

d)

4

Indication of the source of manufacture;

The nominal diameter;

Class reference;

The last two digits of the year of manufacture;

The non-standard length of the pipe if

specially ordered;

Where applicable, an indication of length

over which the pipe is suitable for cutting on

site; and

A short white line at the spigot end of each

pipe with push-on joint in sizes DN 700 and

above, to indicate the major axis of the

spigot.

NOTE - Manufacturers may recommend that spigot end ofsuch

pipes be jointed with the major~axis in the vertical position.

18.1.1 Marking may be Done

a) on the socket faces ofpipe centrifugally cast

in metal mould, and

b) on the outside of the socket or on the barrel

of pipe centrifugally cast in sand mould.

18.2 INS Certification Marking

The pipes may also be marked with the Standard Mark.

18.2.1 The use of Standard Mark is governed by the

provisions of Bureau of Indian Standards Act, 1986

and the Rules and Regulations made thereunder. The

details of conditions under which licence for the use

.of Standard Mark may be granted to the manufacturers

or producer may be obtained from the Bureau of Indian

Standards.

14

IS 8329 : 2000

ANNEX A

(Clause 16.2)

ZINC COATING

A-l PIPE SURFACE CONDITION

The pipe surface shall be dry and free from rust or

any non-adhering particles or foreign matter such as

oil or grease. Metallic zinc shall be applied on to the

oxide external surface of the pipe.

NOTE --~~ The zinc is normally applied on the pipe with oxide

skin but, at the manufacturer’s option, it may applied on a blast

cleaned pipe surface.

A-2 MATERIALS

The coating materials are metallic zinc with content

of at least 99 percent by mass.

A-3 METHOD OF APPLICATION

The metallic zinc coating shall be applied by a

spraying process in which metallic zinc material is

heated to a molten state and projected in small droplets

by spray guns onto surface. The zinc rich paint coating

shall be applied by a spraying or a brush process onto

the pipe surface in case of repair only.

A-4 COATING CHARACTERISTICS

A-4.1 The metallic zinc coating shall cover the outside

diameter of the pipe and shall be free from such defects

as bare patches or lack of adhesion.

A-4.2 Damaged areas of zinc coating caused by

handling are acceptable provided that the damage is

less than 5 cm2/m2 of coated surface and provided that

the minor dimensions of the damaged area do not

exceed 5 mm.

A-5 ZINC COATING MASS

The average mass of zinc coating shall be not less

than 130 g/m* with a local minimum of 110 g/m*.

A-6 DETERMINATION OF ZINC COATING

Manufacturing process control system shall specify

the frequency of this test. A rectangular token is

attached along the pipe axis before passing it through

the zinc coating equipment. After coating and

trimming the minimum token sizes shall be either:

a) 250 mm,x 100 mm, or

b) 500 mm x 50 mm.

The average mass of zinc coating M expressed in

grams per square metre, is calculated by mass

difference of the token before and after zinc coating

from the following formula:

M = C(M,-M,)

A

where

M,, IV, = mass in grams before and after zinc

coating measured to an accuracy of 0.1 g,

A = area of the token in square meter, and

C

= correction factor depending on the

material of the token taking into account

difference in surface roughness between

the token and the pipe surface.

The value of C shall be determined by the manufacturer

and specified when required in test documents.

A-7 REPAIRS OF THE ZINC COATING

Areas left uncoated, for .example under the test token

and coating damaged in excess of 5 cm2/m2 of coating

shall be repaired by either:

a) a metallic zinc spray.

b) by application of zinc rich paint containing

more than 90 percent zinc by mass in the

dried film: mean mass of the applied paint

shall not be less than 150 g/m*.

c) Flanges of welded flanged pipes and welded

parts of the flanges shall be coated with zinc

rich paints (90 percent).

A-8 FINISHING LAYER

After metallic zinc coating or zinc rich paint coating

the pipe shall be given a finishing layer of bituminous

paint or synthetic resin compatible with the zinc

coating.

Application of this finishing layer may be done by

any proven process such as spraying or brush coating

at the manufacturer’s choice. It shall uniformly cover

the zinc coating and be free from bare patches or lack

of adhesion.

The mean dry film thickness of the finishing layer

shall not be less than 70 pm with nowhere less than

50 pm.

15

IS 8329 : 2000

ANNEX B

(Clause 16.3)

CEMENT MORTAR LINING

B-l MATERIALS

B-l.1 Cement

The cement used for the lining shall conform to the

existing standards on cement. The type of cement to be

used is to be mutually decided between the purchaser

and manufacturer. Normal recommendations are:

a) Portland cement (as per IS 8 112 or IS 455)

mortar lining perform rather well and have

an expected life of approximately 50 years in

soft water with moderate amount of

aggressive CO, and whenpH is within 6 to 9.

Longer service life can be obtained by

increasing the mortar lining thickness.

b) Where cement mortar lining may be exposed

to sulphate attack, ordinary Portland cement

should be replaced by sulphate resisting

Portland cement (as per IS 12330 or IS 6909).

The sulphate concentration limit for suiphate

resisting Portland cement is approximately

3 000 mg/litre, the same as blast furnace slag

cement which naturally possess a good

resistance to sulphate attack. For sea water

transmission blast furnace slag cement which

has C, A content below 3 percent can be used.

c) High alumina cement’ (as per IS 6452)

mortar lining is suitable for continuous use

ofpH between 4 and 12 and no severe damage

occur after occasional exposure to pH 3 to 4

and 12 to 13.

d) The recommended type of cement used for

lining are as given in Table 14.

B-l.2 Sand

The sand used shall have a controlled granulometric

distribution from fine to coarser elements; it shall be

clean and shall be composed of inert, hard, strong and

stable granular particles.

The fine fraction comprising particles passing through

a sieve of aperture size 0, 125 mm shall not be more

than 10 percent by mass.

The fraction comprising grains up to a maximum

diameter equal to one-third of the normal thickness

of the mortar lining shall not be less than 50 percent

by mass.

The coarsest fraction (comprising particles which do

not pass through a sieve of the aperture size closest to

half the normal thickness of the mortar lining) shall

not exceed 5 percent by mass.

B-l.3 Water

The water used for the preparation of the mortar shall

not contain substances deleterious to the mortar nor

to the water it is eventually intended to transport in

the pipe. The presence of solid mineral particles is,

however, admissible provided that these requirements

are still fulfilled.

B-l.4 Mortar

The mortar of the lining shall be composed of cement,

sand and water.

Additives, which shall be specified, may be used,

provided that they do not prejudice the quality of the

coating and that of the transported water.

The mortar shall be thoroughly mixed and shall have

a consistency which results in a dense and

homogeneous lining.

The mortar shall contain by mass at least one part of

cement to 3.5 parts of sand.

B-2 CONDITION OFTHE INTJZRIOR SURFACE OF

THEPIPEBEFOREAPPLICATIONOFTHELINING

All foreign bodies, loose scale or any other material

Table 14 Recommended Type of Cement Used for Lining

(Clause B- 1.1)

Water Characteristics Portland Cement Sulphate Resisting Cements High Alumina Cement

(Including Blast-Furnace Slag

Cements)

(I) (2)

(3) (4)

i) Minimum value ofpH 6

5.5

4

ii) Maximum content (mg/l) of:

Aggressive CO, 7

15 No limit

Sulphates (SO,)

400

3 000

No limit

Magnesium (Mg”) 100 500 No limit

Ammonium (NHI*) 30 30 No limit

16

which could be detrimental to goodcontract between

the metal and the lining shall be removed from the

surface to which the lining is to be applied.

The inner surface of pipe shall also be free of any

metal projections likely to protrude beyond 50 percent

the thickness of the lining.

B-3 APPLICATION OF THE LINING

The cement mortar lining at works is applied by a

centrifugal spinning processor a centrifuged sprinkler

or a combination of both methods.

Apart from the inner surface of the joint, the parts of

the pipe coming into contact with the transported water

shall be entirely covered with mortar.

Once centrifuging is finished, the lining shall be cured

at temperatures greater than 4°C. Any loss of water

from the mortar by evaporation shall be sufficiently

slow so that hardening is not impeded.

B-4 REPAIR OF LINING

Repairs to damaged or defective areas are allowable.

The damaged mortar shall first be removed from these

areas. Then the defective part shall be repaired by

using, for example, a trowel with fresh mortar so that

a continuous lining having a constant thickness is

again obtained.

For the repair operation, the mortar shall have a

suitable consistency, if necessary, additives may be

included to obtain good adhesion against the side of

the existing undamaged mortar.

B-5 THICKNESS OF THE LINING

The normal thickness of the lining and the minimum

permissible mean and local values are given in the

Table 15.

At the pipe ends, the lining may be reduced to values

below the minimum thickness. The length of the

chamfer shail be as small as possible but, in any case,

shall be less than 50 mm.

B-6 DETERMINATION OF LINING THICKNESS

The thickness of the lining is checked on the freshly

centrifuged mortar by the insertion of a steel pin, or

on the hardened mortar by means~of a non-destructive

method of measurement. The thickness of the lining

shall be measured at both ends of the pipe in at least

one section perpendicular to the pipe~axis.

B-7 SURFACE CONDITION OF THE

HARDENED LINING

The surface of the cement mortar lining shall be

uniformly smooth. Only isolated grains of sand are

allowed to appear on the surface of the lining.

17

IS 8329 : 2000

The lining shall be such that it cannot be dislodged

with pressure of hand and shall be free from

corrugations or ridges that could reduce the thickness

of the lining to less than the minimum value at one

point, as specified in the Table 16.

Table 15 Thickness of the Lining

(Clause B-5)

All dimensions in millimetres.

DN

Thickness Maximum Crack

I Width I Radial

Nominal Value Tolerance Displacement

(1)

(2) (3) (4)

80 to 300 3.0 -1.5

018

350 to 600 5.0 -2 l/O

700 to I 200 6.0 -2.5 l/2

I 400 to 2 000 9.0 -3 l/5

NOTE - Fitting ends may have a chamfer of maximum length

50 mm.

Table 16 Minimum Bore Clearance Cement

Mortar Lining of Ductile Iron Pipe

(Clause B-7)

DN

Minimum Bore of Cement Mortar

Lined Pipe (mm)

(1)

(2)

80 67.0

100

87.0

I50 137.0

200

187.0

250 237.0

300 287.0

NOTE - For other DIV the minimum bore should not be less

than I5 mm from nominal dia.

On contraction of the lining, the formation of cracks

cannot be avoided. These cracks, tagether with other

isolated cracks which may result from manufacture

or may develop during transportation, are acceptable

up to awidth given-in the above.

B-8 SEAL-COAT

B-8.1 General

When specified the cement lining shall be given a seal-

coat of bituminous material or any other epoxy based

material compatible with cement mortar lining. Other

seal-coat materials may be used, but they shall be

agreed on at the time of purchase and shall be specified

on the purchase order.

The purpose of seal-coat is to minimize lime leaching

of the cement mortar as well as to restrict the unwanted

rise in pH value of the transmitted water.

When the pipes are to be used for conveying potable

water the inside coating .shall not contain any

constituent soluble in such water or any ingredient

which could impart any taste or whatsoever to the

potable water after sterilization and suitable washing

of the mains.

IS 8329 : 2000

ANNEX C

(Clause 16.2)

BITUMINOUS COATING

Unless otherwise agreed between the purchaser and

manufacturer, all pipes shall be coated externally and

internally with the same material. (Bituminous

coatings are either hot applied or cold applied.)

C-2 GENERAL CHARACTERISTICS

C-l GENERAL Minimum thickness shall be not less than 50 l_tm.

C-2.3 Where the coating material has a bitumen base,

it shall be smooth and tenacious and hard enough not

to flow when exposed to a temperature of 65°C but

not so brittle at a temperature of 0°C as to chip off

when scribed with a penknife.

C-2.4 When the pipes are to be used for conveying

potable water the inside coating shall not contain any

constituent soluble in such water or any ingredient

which could impart any taste or whatsoever to the

potable water after sterilization and suitable washing

of the mains.

C-2.1 Coating shall not be applied to any pipe unless

its surfaces are clean, dry and free from rust.

C-2.2 Unless otherwise agreed between the purchaser

and the manufacturer all pipes shall be coated

externally and internally with the same material. The

method of coating shall be as per usual practice of the

manufacturer. The coating material shall set rapidly

with good adherence and shall not scale off.

The mean thickness of the coating shall be not less

than 70 ym and the local.

C-2.5 Pipes with or without sockets and flanges which

are imperfectly coated or where the coating does not

set or conform to the required quality, the coating shall

be removed and the pipes/flanges recoated.

ANNEX D

(Clause 16.2.1)

POLYETHYLENE SLEEVING

D-l MATERIAL

D-l.1 Characteristics

The material used for making the film is polyethylene

or a mixture of polyethylenes and/or ethylene and

olefin copolymers.

Its density shall be between 910 and 930 kg/m3.

D-l.2 Additives and Impurities

Table 17 Layflat Width of Tubular Polyethylene

Film for Various Sizes of Iron Pipe

(Clause D-2.1)

Nominal lnternal For Use with Pipeline

Diameter of Pipe Incorporating

in mm

Flexible Joints

80 350

100 350

150 450

200 550

If protection against ultra-violet rays is required, the

material shall be stabilized by the addition of an

appropriate product: if carbon black is used for this

purpose the addition shall be in the range of 2 to 3

percent by mass.

D-2 DIMENSION

250

300

350

400

450

500

600

700

750

D-2.1 Width

650

700

800

I 100

1 100

1 350

I 350

I 750

2 000

800

900

I 000

2 000

I 100 2 500

I 200 2 500

I 400 2 750

I 500 2 750

1 600 3 100

I 800 3 600

2 000 4000

NOTE - Actual layflat width of the tubular film shall not differ

from the nominal by more than f 2.5 percent.

The nominal flat width of the tube or flat or flat sheet

is specified in Table 17.

D-2.2 Thickness

The nominal thickness of the sleeving shall be not

less than 200 and not

pm

more than 25Opm unless

otherwise agreed.

18

IS 8329 : 2000

The negative tolerance on the nominal thickness shall

not exceed 10 percent.

D-4 ELONGATION

The elongation at fracture of the film in the

longitudinal and transverse directions shall be not less

than 300 percent.

D-5 DIELECTRIC STRENGTH

The dielectric strength of the film should be 3 1.5 V/pm

minimum.

If necessary, it is permitted to use thicker sleeving or

double sleeving.

D-3 MECHANICAL PROPERTIES

Tensile strength of the film in the longitudinal and

transverse direction shall be not less than 8.3 MPa.

ANNEX E

(Table 1)

HYDROSTATIC SITE TEST PRESSURES AND HYDRAULIC WORKING PRESSURE

E-l Suggested maximum hydrostatic site test pressure

of surge and inclusive of surge) may be followed as

and maximum hydraulic working pressure (exclusive

under:

DN

(mm)

Allowable

Operating

Pressure

K9

Allowable

Maximum

Operating

Allowable Site

Test Pressure

(STP)

Allowable

Operating

Pressure

KIO

Allowable

Maximum

Operating

Allowable Site

Test Pressure

(STP)

(Excluding Surge)

Pressure

(Excluding Pressure

AOP (including Surge)

Surge) AOP

(Including Surge)

MOP MOP

MPa

MPa MPa

80

6.4 7.1

9.6

6.4 7.7

9.6

100

6.4 7.7

9.6

6.4 7.7 9.6

125

6.4 7.7

9.6

6.4 7.7

9.6

150

6.4 7.7

9.6

6.4 7.7

9.6

200

6.2 1.4

7.9

6.4 1.7 9.6

250

5.4 6.5

1.0

6.1 7.3 7.8

300

4.9 5.9

6.4

5.6 6.7 7.2

350

4.5 5.4

5.9

5.1 6.1

6.6

400

4.2 5.1

5.6

4.8 5.8

6.3

450

4.0 4.8

5.3

4.5 5.4

5.9

500

3.8 4.6

5.1

4.4 5.3

5.8

600

3.6 4.3

4.8

4.1 4.9

5.4

700

3.4 4.1

4.6

3.8 4.6

5.1

750

3.3

3.9 4.4

3.7 4.4

4.9

800

3.2

3.8 4.3

3.6 4.3

4.8

900

3.1

3.1 4.2

3.5 4.2 4.7

I 000

3.0

3.6 4.1

3.4 4.1

4.6

I 100

2.9

3.5 4.0

3.2 3.8

4.3

1 200

2.8

3.4 3.9

3.2 3.8

4.3

I400

2.8

3.3 3.8

3.1 3.7

4.2

1 500

2.7

3.2 3.7

3.0 3.6

4.1

I 600

2.7

3.2 3.7

3.0 3.6

4.1

1 800

2.6

3.1 3.6

3.0 3.6

1

2 000

2.6

3.1 3.6

2.9 3.5

,d- 4.0

19

(Continuedfrom second cover)

ISO/DIS 10803 : 1997(E)

ISO/DIS 10804:Part-l/l994

EN 545 : 1994

EN 598 : 1995

EN 969 : 1996

Design method for ductile iron pipes

Restrained joint system for ductile iron pipelines: Part 1 Design rule and

type testing

Ductile iron pipes, fittings accessories and their joints for water pipelines.

Ductile iron pipes, fittings, accessories and their joints for sewerage

applications

Ductile iron pipes, fittings, accessories and their joints for gas pipeline

For the purpose of deciding whether a particular requirement of this standard is complied with, the. final value,

observed or calculated, expressing the result of a test, shall be rounded off in accordance with IS 2 : 1960 ‘Rules

for rounding~off numerical values (revised)‘. The number of significant places retained in the rounded off value

should be the same as that of the specified value in this standard.

,_

..,_-.

________.._.__

_.

_

.--.__

Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promote

harmonious development of the activities of standardization, marking and quality certification of goods

and attending to connected matters in the country.

Copyright

BlS has the copyright of all its publications. No part of these publications may be reproduced in any form

without the prior permission in writing of BIS. This does not preclude the free use, in the course of

implementing the standard, of necessary details, such as symbols and sizes, type or grade designations.

Enquiries relating to copyright be addressed to the Director (Publications), BIS.

Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed

periodieally; a standard along with amendments is reaffirmed when such review indicates that no changes are

needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards

should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of

‘BIS Catalogue’ and ‘Standards: Monthly Additions’.

This lndian Standard has been developed from Dot : No. MTD 6 (4227).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

BUREAU OF INDIAN STANDARDS

Headquarters :

Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110 002 Telegrams : Manaksanstha

Telephones : 323 01 3 I, 323 33 75,323 94 02 (Common to all offices)

Regional Offices : Telephone

Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg 323 76 17

NEW DELHI 110 002 323 38 41

Eastern : l/l 4 C. I. T. Scheme VII M, V. I. P. Road, Kankurgachi 337 84 99,337 85 61

CALCUTTA 700 054 337 86 26,337 91 20

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60 20 25

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LUCKNOW. NAGPUR. PATNA. PUNE. RAJKOT. THIRUVANANTHAPURAM.

Printed at Dee Kay Printers, New Delhi

AMENDMENT NO. 1 SEPTEMBER 2001

IS 8329: 2000 CENT%JGALLY CAST (SPUN)

DUCTILE IRON PRESSURE PIPES FOR WATER, GAS

AND SEWAGE — SPECIFICATION

(

Third Revision)

(Page 3, clause 4.4) —

Delete.

(Page 3, clause 6.1.2) — Substitute the following for the existing clause:

‘6.1.2 For high pressure mains where working pressure is substantial, depending

on site condition, suitable flexible joint may be preferred where the joint is

restrained against axial movement.’

(

Page 4, clause 7.2, lines 14 and 15 ) — Substitute the following for the

existing:

‘all the requirements of clauses 10 and

11.’

(Ppge

5, clause 10.1.6, IVole 2 )

—

Substitute the following for the existing

‘2 For ductile iron pipes up (oDN 1 COO,if the microstructure reveals 75 percent ferrite with

spheroidal grapfrite and percentage elongation higher than or equal to 7, it shall be taken as

meeting the requirement of this standard when the tensile strength of the specimen is within

the specified limit.’

( Page 6, clause 11.1.1, line 1 ) — Insert ‘minimum’ before ‘Hydrostatic

test’.

(Page 6,

clause 11.2) — Substitute the following for the existing clause:

‘11.2 Test shall be carr@i out before the application of surface coating and

lining except zinc coating, which may be applied before the hydrostatic test.’

(Page 6, clause 12.2) — Substitute the following for the existing clause

‘12.2 The critical external diameter of spigot of pipes for push-on flexible joint

and mechanical joint for all classes are given in Table 2 for reasons of safety and

interchangeability.’

1

Amend No. 1 to IS 8329:2000

(Pages 8,9,10

and 11, Tables 3,4,5 and 6 ) – Delete the existing column

‘a’. Title ‘b’ of the column maybe read as ‘a’.The letter ‘b’ in the sketch may be

omitted.

(Page 12, clause 15.4 ) — Substitute the following for the existing

The tolerance on wall thickness (e) and flange thickness (b) of the pipes shall be

as follows:

S1

Dimension

Tolero~ce,

No.

mm

i Wall thickness (e)

upto 6 mm -1.3

ii)

Wall thickness(e) above 6 mm -(1.3 + 0.001 DN)*

.,.

111

Flange thickness (b)

*(2 + 0.05b)

Ine IoleraRWgiven is subj~t to ~i~mum thickness against all cl- given in 4.3. NO‘tit

for theplus tolerance is specified.’

(Page 12, clause 15.4 ) — Insert a new clause after 15.4:

‘15.4.1 Pipe wall thickness compliance shall be demonstrated by the

manufacturer, he may use combination of various means such as:

— Direct wall thickness measuring or gauging by suitable requirements such as

mechanical or ultrasonic equipment.

— The frequency of testing is related to the system of production and quality

control used by manufacturer,

(Page 13, clause 16.1 ) — Substitute the following for the existing:

‘16.1 Unless otherwise agreed betsveen the manufacturer and the purchaser, all

pipes shall be delivered with an external bituminous coating in accordanrx with

provisions of Annex C.’

(Page 13,

clause 16.2, line 8) — Delete the sentence ‘Bituminous paint: as

included in Annex C’.

(

Page 17, Table 15, CO14 ) — Substitute the following for the existing

values:

‘0.8, 1,0,1.2 and 1.5’ respectively.

2

Amend No. 1 to IS 8329:2000

(Page

19,Amex E) — Substitute the following for the existing

ANNEX

E

( Table

1 )

HYDROSTATIC SITE TEST PRESSURES AND

HYDRAULIC WORKING PRESSURE

80

100

125

150

200

250

300

350

400

450

500

600

700

750

800

900

1000

1100

1200

1400

I 600

1800

2000

0.8

0,8

0.8

1.0

2.9

2.8

2,7

2.6

(MTD6)

1’21

6-I

64

6.4

I.0

1.0

1.()

I.0

i.()

I,0

1.()

10

Lo

I o

10

1.()

10

2.9

2x

2.8

2.7

26

6.4

6.2

5.4

4.9

4.5

4.2

4.0

3.8

3.6

3.4

3.3

3.2

3.1

3.0

2,9

2.8

2.7

2.6

—

6,4

6.4

6,4

6.1

5.6

5.1

4.8

4.5

4.4

4.1

3.8

37

3.6

3,5

3.4

3.2

3.1

3.0

2.9

Allowable Maximum

Operating Pressure

(including surge) MOP

1 !

I

K71K8\K9

KIO

1.25

1,25

1.25

I,25

1.25

1,25

1.25

1.5

I.5

3.5

3.4

3.3

3.2

3.1

MPa

1

7.7

1.5

I.5

1,5

I.5

1,5

1.5

I.5

1.5

I.5

3.5

3.4

3.3

3,2

3.1

7.7

7.4

6.5

5.9

5.4

5.1

4.8

4.6

4.3

4,1

3.9

3.8

3.7

3.6

3,5

3.4

3.3

3.2

3.1

3,1

—

7.7

7.3

6.7

6.I

5.8

5.4

5.3

4.9

4.6

4,4

4.3

4.2

4.1

3.8

3.7

3.6

3.5

Allowable Site Test

Pressure

(STP)

K7 KS K9 K1O

1.75

I.75

i .75

1.75

1,75

1.75

1,75

[.75

I.75

2.0

4.0

3,9

3.8

3.7

3.6

MP

96

9.6

2.0

4.0

3.9

3.8

3.7

3.6

1

?.6

9.6

9,6 :

7.9

7.0

6.4

5.9

5.6

5.3

5.1

4.8

4.6

4,4

4,3

4.2

4.1

40

3.9

3.8

3.7

3,6

3.6

—

Reprography Unih BIS, New Delhi, Idla

3

—

9.6

7.8

7.2

6.6

6.3

5.9

5.8

5,4

5.I

4.9

4.8

4.7

4.6

4.3

4.2

4.I

4.1

4.0

1

.- —..

—— .—.

AMENDMENT NO. 2 NOVEMBER 2012

TO

IS 8329 : 2000 CENTRIFUGALLY CAST (SPUN)

DUCTILE IRON PRESSURE PIPES FOR WATER,

GAS AND SEWAGE — SPECIFICATION

( Third Revision )

(Page 8, Table 3, Nominal Diameter DN 1100, Number of holes) —

Substitute ‘32’ for ‘28’.

(MTD 6)

Reprography Unit, BIS, New Delhi, India