IS 651 : 1992 ( Reaffii~ed 1997 )

Indian Standard

SALT-GLAZED STONEWARE PIPES AND FITTINGS - SPECIFICATION

( Fifth Revision )

Third Reprint DECEMBER 1998

uDC 621.643.032.5

B CJ H E A IJ 0 I’ 1 Iv D I A N S ‘I’ A N D A R 11 S

MANAJ< BHAVAN. 9 BAHAJIUR SHAH ZAFAR MARG

NEW DELHI 110002

Alwch 1992 Price Group 8

-;

Sanitary Appliances and Water Fittings Sectional Committee, CED 3

FOREWORD

This Indian Standard ( Fifth Revision) was adopted by the Bureau of tndian Standards after the draft finalized by the Sanitary Appliances and Water Fittings Sectional Committee had been approved by the Civil Engineering Division Councii.

This standard was first published in 1956. First, second, third. and fourth revioions of the- stani:d;‘i$ were issued in 1962. 1965, 19’71 and 1980 respectively.

In this revision, the following major modifications have been made:

a) Classification of pipes and fittings which earlier was in two grades has been dispensed with.

b) Tests for acid resistance and alkali resistance for pipes and fittings which earlier were optional have now been made mandatory.

c) In addition to,general updation, the values have now been given in SI units.

For the purpcse of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis. shall be rounded off in accordance with IS 2 : 1960 ‘Rules for rounding off numericat values ( revised 1’. The number of significant places retained.in the rounded off values should be the same as that of the specified values in this standard.

IS 651 : LWb

Indian Standard SALT-GLAZEDSTONEWAREPIPESAND

KI-TINGS --SPECIFICATION ( Fiji% Revision )

1 SCOPE

I .I. This standard covers dimensions and performance requirements for the following salt glazed stoneware. $~s and fittings:

a) Straigbt pipes; b) Bends; c) Taper bend; d) Junctions; e) Half-section channels, straight and taper; f) Channel junctions; g) Channel bends; b) Channel interceptors; j) Gully traps; and k) Inspection pipes.

1,P.f The pipes as covered in this standard .;:d 35; meant for,potable water applitatic-xi.

I,2 Dimensions of glazed stoneware pipes aird i&rr*gs are grouped into two Sectrons, A&B. Scclron W covexs dimensions of straip,l:t pi;xs and ski :.ii<h fittings which normally form part of pipe-11nc :i:.d ,‘>;hich are subject to same mnditicm. specificati~::i~s scd tesLs as straight pipes. Se&on 13 inc?u.les dimenxtcions of fittings wbici, are comr~.only uscc :lut Jo not form a part of the norms1 pipe-iitse. IYbe fi?t~ll~x is? Secti~n B being hand_moulded articles, tb~r

conformity to dimensional specifications is not required to be so awurate as for those in Section A.

2 REFERENCES

2.1 Tbe following Indian Standards are the necessaq adjunct to this standard:

IS IVO. Title

X08 : 1989 L>imensions for hot rolled steel beam, column channel and angle section : third revision )

2730 : 19?7 Magnesium sulphate (epsom salt) ; firsr revision )

2-T: :Y75 ~bSil~ Of krmS Mhtiq t0 CeI?lJIUC

ware ( jirsl revision )

3,1 FOI &hr puqm~ of tbis standard, the definitions of :r’r~n~ gx~cn in IS 2781 : 1975 shall apply.

4 %8(;H’F-It4ND AND LEFT-HAND FITTINGS

4.1 A Tight-band fitting is such that when viewed t’r~an the spigot towards the socket, the arm of a iu~aion or the sockrt of a bend projects to the righ : SW I-ig. 1.4 2nd 13 . A Ml-hand fitting is such tha ~:ii,:n viewed 7~ atlctvr, rhc at-m of socket projec s tc the left.

i 1 A Channel Junction 18 Channel Bend

FIG. 1 RIGHT-HAND FIITNGS

1

IS 651 : 1992

5.1 All pipes and fittings shall be sound and free from visible defects which impair the strength, durability and serviceability. The glaze of pipes and fittings shall be free from crazing. The pipes and fittings shall give a sharp clear note when struck with a iight h;%mmer.

5.2 For pipes and fittings, a maximum of 10 percent shall be acceptable with any one of following blem- ishes which do not impair the strength, durability and serviceability provided these pipes and fittings satis- factorily pass the hydraulic test specified in 7.2:

a)

c)

A thin chipping not exceeding one quarter of the thickness of the body and not exceeding 10 c&on the outside of spigot or on either side of the socket;

One blister, unbroken, not more than 3 mm high not more than 40 mm in largest dimrn- sion inside or outside of the pipe; and

Hairline surface cracks.

5.3 Colour of pipes/fittings may vary from yellow to dark brown/black.

6 GLAZING

6.1 The interior and exterior surfaces of the pipes and, fittings which remain exposed after jointing, shall be glazed. The portion which remains covered afterjoint- ing may or may not be glazed. The glaze shall be obtained by the action of fumes of volatized COII~IOII

salt on the material of the pipes and fittings during the process of burning ( see Note ).

NOTE - Alternatively glaze shall be ceramic glaze consisbn$of glazing material. applied prior IO firing.

7 TESTS

7.1 Testing Facilities

De manufacturer shall, at his premises and at his own cost, provide the necessary gauges, supply and prepare all test.pieces and supply all labour and apparatus for testing which may be necessary for carrying out the tests as required by this standard.

7.2 Hydraulic Test

When subjected to the hydraulic test straight pipes shall withstand an internal hydraulic test pressure of:

a) 0.15 MPa* on the barrelsand fittingsspecified in Section A, and

b) 0.07.5 MPa for fittings covered in Section 8.

Without showing signs of injury or leakage. The pres- sure shall be applied on pipes and fittings at a rate not exceeding 0.075 MPa in 5 seconds, and futl pressure shall be maintained forat least 5 seconds. Care shall be taken toensure that all air is expelled before the test is commenced.

l l MPa = 10.2 kg/cm*.

7.3 Absorption Test

The test pieces for testing shall be tahen from the body ofthe pipe or fitting but not from within 150 mm of the end.

l!ach test pieces shall be of the whole thickness of the wall of thr pipe or fitting and shall have two glazed surfaces each h::ving an area i)f not less than 50 cm2 aud not more thau 130 cd. The test pieces shall be cleaned by wire brush to dislodge au~‘:nose particles ~+!lich may increase loss of liiass during boiling. ne testpicccshallhedrirdatatc~~~peratureofnotlessthan 1So;‘C until MI furthrr loss ofntass is noted and cooied in a desiccator to the rmnl temperature and the speci- IW!I weighed to au accuracy of 0.1 g. The test piere may be suitable suspcndcd in cold Distilled water by means of thread so that the test piece may not strike against each other or tt,c container and incur loss in mass and the water in the container shall then be brought to the boiling point. The water shall be main- taiued at that !rmperaturr for 1 hour and after it has been allowed to cool to room temperature, the test pieces shall be removed carefully wiped with a dry cloth and then the mass determined. The percentage increase in mass of each test piece by absorption of water shall not exceed the following values:

Thickness of Pipe increase in Mas.s or Fitbng, 111111 Percrnt

Up to and including 20 6 Over 20 and up to 25 7 Over 25 dnd up to 32 8 Over 32 and up to 38 9 Over 38 IO

7.4 Test for Acid Resistance

Pipes and fitt;,lgs shall be tested for acid resistance with hydrocholoric or nitric or sulphuric or acetic acid in accordance with the procedure given in Annex A. The loss in mass shall not exceed 0.25 percent.

7.5 Test for Allurli Resistance

Pipes and fittings shall be tested to the action of magnesium sulphate in axordance with the procedure given in Amiex B. There shall be no evidence of pitting, softening, spalling or cracking in the pipe or fitting after the test.

7.6 Crushing Strength Test

When tested along the full length of the pipe barrel from shoulder to spigot in accordance with Annex C, the pipe tested shall have a minimum crushing strength of 16 k N/m length.

8 SAMPLING AND CRI’TERZA FOR CONFORMITY

8.1 The method of drawing representative samples and the criteria for conformity shall be as przscribed in Annex D.

2

IS 651 : lM2

9 MARKING a) Name or trade-nI:Irk of Ihe rnantifachmr, and b) Size (Internal D~‘;I).

9.1 Every pipe and fitting shall have legibly impressed upon it More firing the following:

9.1.1 Each pipe and fitting ~llny also be marked with the Standard Mark.

SECTION A PIPES AND FllTlNGS FORMING PART OF PIPE LINE

10 IN-I’ERNAL DIAME’IXR

10.1 The internal diameter of the barrels of straight pipes, junctions and bends shall be as specified in co1 1 of Table 1.

10.2 Permissible Tolerances

The internal diameters specified in 10.1 shall be within the following tolerances:

lnterntrl Dinmclcr Permissible of Pips Tolcrcrnce

111111 111 Ill

100 +3 150 z5 200, 230 +6 250 to 350 +8 400,450 210 500, 600 ?I2

Table 1 Dimensions of Barrels and Sockets

(Ck~~rrses 10.1, 10.2,11.1, 13.1, 13.1.1, 13.2, 14.1 crnd 1X.1 )

All dimensions in millimetres.

1lltcnlid Diameter

(1)

Mean Thlck- DCSS of Rarrei and of Socket,

Min A

(2)

Intcnlal Depth of Socket,

Min B

(3)

Excess Sbouldcr

M~SUMUCII~

Mlll c

(4)

L-gtbQf Groovhg of

wtel Min

D(l’/,B)

(5)

100 12 30 10 75

150 15 57 11 85.5

200 16 63 12 94.5

230 t 19 63 12 94.5

250 20 IO 16 105

300 25 70 16 105

350 30 75 16 113.5

400 35 75 16 112.5

450 37 76 16 114

500 40 80 19 120

600 43 90 19 135

*E = widthofshoulderof socket whichshall exceed the mean thicknessof the barrel offhe pipc(ascerlained asdirected in 11.1) by not less than

Ihe values for C given in co1 4.

t This is non-preferred size and has been included to facililafe replacements.

3

%S 651 : 1392

THICKNESS OF RA EHS, SOCKETS AXD NDS

11.1 The mean thickness of the barrel and the socket f the pipes junctions and bends shall not be less than

the means thickness given i;a co1 2 of Table 1. Such mean thickness of the barrels or sockets of any individ- ual pipe juctions and bends shall be ascertained by making several minimum4 measurements and adding the measured minimum thickness (not in the groove) to the maximum thickness and dividing the sum by kwcp. The mean thickness of the barrel and socket shall be determined separately.

11.2 Permissible Variation

The difference between the minimum and maximum measured thicknesses mentioned in 11.1 shali not exceed the amounts given below:

internal Diameter of Pipe

Permissible Variation in Thickness of Barrel and

sockets

mm mm

Not exceeding 450 2

500 and 600 3

12 LENI : 2x1 AND STRAIGHTNESS OF- I%!? I::, G. : :W STRAIGHT AND ‘FAPER PIPES

It.1 ?T-!e ;~n+qh of the barrels of straight and taper pipes, junctions and half-section channels, exclusive of the ;nt$,rn;lI rlcp~;~ of the socket, shall be 600,750 or 9!J@ mm.

12.2 PernTasFible Tolerance on Length

The permissible tolerance on length shall be within ~10 mm for pipes of 600 and 750 mm length and rt 15 mm for pipes of 900 mm fength.

12.3 Permissible Deviafion From Straightness

The maximum permissible deviation from straight- ness of the barrel of a pipe, measured on the inside of the curve and lested by means of a straight edge, for all diameters of pipe, shall be 5 mm for pipes of 600 mm length, 6 mm for pipes of 750 mm length and 7 mm for pipes of 900 mm length.

13 TAPERS, RENDS AND JUNCTIONS

13.1 I&ernal diameters of taper pipes (seed and D of Fig. 2), half-section straight channels (scle Dof Fig. 3), half-section taper channels (seed and D of Fig. 4) and junctions (see Fig. 5 and Fig. 6) shall be selected from thosexiven in co1 1 of Table 1. Dimensions of bends shall be in accordance with Tables 2 to 6.

RG. 2 CONCENTRIC TAPE& hl’E

FIG. 3 H.UFSEC’IlON !hAIGHT CHANNEL

d-fitiif- - --- --+ D

Frc;. 4 fhLF&CTiON TAPER CHANNU.

IS 651 : 1992

5A SQUARE TYPE

i

58 CURVED SQUARE TYPE

NOTE - The socket of rhe branch arm should IX as close to the main socket as possible. The barrels and branches of junclions may be of any of fhe diameters shown in co1 1 of Table 1 but the diameter ‘d’ of ihe branch shall not exceed that of the barrel ‘D’. The length of the barrel may be 600 mm, 750 mm or 900 mm.

FIG. 5 JUNCTIONS WITH BRANCH AT AN ANGLE OF APPROXIMATELY 900

?_ 45’ OR 90”

NOTE - The socket of the branch arm should he. as close lo the main socket as possible. The barrels and branches ofjunctions may

bcofanyof thediametersshownincoi lofTable 1 butthediameter’d’cfthe branchshailnotexccedrhatofthebamldia’D’.Bnnches

up to and including 200 mm diameter form an-angle of approximately 45Oand branches over 200 mm diameter form an angle of

approximately 55“to 60” IO the barrel, according IO size.

FIG. 6 JUNCTION WITH BRANCH AT AN ACUIE AVGLJZ

5

-

TipMe 2 Dimensions of One-Quarter Bends (Clause 13.1)

All dimensions in millimerres.

i a

(1) (2) (3) (4)

100 90 140 150

1so 150 190 190

200 215

230, 215

2so >

255

300

330 390

400 420

450 455

500 490

600 550

W is a non-preferred size and has been included to facilitate replrcemen~~.

(5) (6) (7)

19b 215 255

230 230 ?65

265 -

265

305

465 -

495

530

570

640 -

6

, -

IS 651: I992

Table 3 Dimensions of One-Eighth Beads Table 4 Dimensions of One-Sixteenth Bends (Clause 13.1) (Clause 13.1)

All dimensions in millimettes. All dimensions in millimetres.

1o.i

1%)

2tM

230 *

250

300

350

400

450

SOCI

600

Short

I

(2:

250

3RO

-

-

__

MCdlUlBl r

(3)

380

460

530

530

610

640

670

700

735

785

Long r

(4’1

5ix.

5i.J

“-

-

_-

-.

-

-

-

*This is a non-preferred swe and ha been included IO facilitate

.Jacements.

lmkrnd Lnameter I

(8 (2) 100 750

150 900

200 1050

230’ 1050

250

300 1200

350 lSO0

400 1800

450 2 150

500 2600

600 3 050

*This is a non-prefwrd SIP w-t has hen included (0 hdlitatc

replacements.

is651:19!32

Table 5 Dimensions of One-Quarter Taper Bends (Clause 13.1)

All dimensions in millimetres

c 1

(1) 100

150

Ir.Iemd Dluda A

I

I

D

(2) (3)

150 150

230 199

a

(4)

190

230

Table 6 Dimensions of One-Eighth Taper Bends (Chtse 13.1)

in millimetres.

Lund-

-1 7

D

0) (2)

100 150

(3)

380

8

13.1.1 The barrels and branches of half-section chan- nel junctions may be of any of the diameters shown in co1 1 of Table 1 but the diameter of the branches shall not exceed that of the barrel diameter (see Fig.7). The angle at junction shall be 4S” z 3O or 900 2 3O.

132 Taper pipes, and half-section taperchannels may be ordered in any normal combination of diameters and lengths. The other dimensions shall be within the limits of pipe size given in Table 1 and under 11 and 12.

14 socKETs

14.1 The interior of the sockets shall be conical, hav- ing a minimum taper of 1 mm, measured on the diameter, per 15 mm length (that is, 1 in 30); this the diameter of a socket 50 mm deep will be at least 3 mm greater at the top than at the bottom. The depth ok the sockets shall be in accordance with Table 1. The width of the shoulder of socket of any individual pipe or fitting shall exceed the mean thickness ofthe barrel by not less than the values given in co1 4 of Table 1.

15 GROOVING

15.1 The interior of the sockets and exterior of the spigots shall be grooved circumferentially, and such groovingon the spigot shall be for a lengthequal toone

IS 651: 1992

and half times the depth of sockets, and the depth of such grooves shall be between 1 inm to 25 mm.

FIG. 7 HAIJ-SECllON CHANNEL JUNCXSON

SECTION B

16 GENERAL for quality. It includes inspection pipes (see Fig. 8)

16.1 This section deals only with designs and dimen- straight and taper channels, junctions and channel

sions of fittings and it does not embody specifications bends, channel interceptors and gully traps.

All dimensions in millimctns

FIG. 8 INS~EC~ON PIPE

9

ISu1:1992

17 DIMENSIONS

17.1 The dimensions

to the appropriate corresponding dimensions of straight

of fittings shall be as given in pipes and sockets given in Table 1.

Table 7 to Table 12 and Fig. 8 within practical limits 19 GROOVING without affecting the utility or serviceability of the fittings. 19.1 The interior of the sockets and the exterior of the

18 SPIGOTS AND SOCKETS OF FITFINGS spigots shall be grooved circumferentially. Where applicable such grooving on the spigots shall be for a

18.1 The spigots and sockets of fittings, except where otherwise provided for in this standard, shall conform

length equal to one and a half times the depth of the sockets, and the depth ofsuch grooves shall be 1 mm to 2.5 mm.

Table 7 Dimensions of Half-Section One-Quarter Channel Eznds (C&we 17.1)

All dimensions in millimetrcs.

(1) (2) (3) (4) (3) (6) (7)

100

lso

200

230

230

300

3so

400

430

So0

600

190 220 260

230 230 270

2c5 -

270

30s

305 -

465

495

530

570

640

Table 8 Dimensions of Half-Section One-Eighth Channel Bends

(C/mm 17.1)

A!1 dimensions in nlillinletrcs.

IS 651: 1992

Table 9 Dimensions of Half-Section One-Sixteenth Channel Bends

(Clause 17.1)

All dimensions in millimeWes.

htecrd Dhmeter

(1)

loo

150

200

230

250

300

350

400

450

500

600

sbesi I

(2)

250

380

(3)

380

460

SO

xw

610

610

640

670

700

735

78s

l Thii is l non-prefemd size rod br kcll itch&d to facilitate rcdacemeaa

lmtumdDbml@a r

(1) (2)

100 750

150 900

200 lo50

230 lOSO

2so 1200

300 1200

350 1XlO

400 18lUl

450 21so

SO0 2600

600 3060

l ‘lhisiar~-prrfenedriae~Idbrrbca~lofrdWsro rcplroemelts.

11

ls651:1992

Tabk 10 Dimensions of Channel Intmepbrs (Chuse 17.1)

Ail dictions in millinetres.

lso 610 7s 65

230* 790 75 65

E

(3 (6)

100 20

100 20

100 20

F G

(7)

7s

7s

90

WJ.& is a nom-preferred size and Itm been iocludad to f&lime replac~~mnts.

12

IS 651: 1992

Table 11 Dimensions of Round Mouth Gully Traps (Chse 17.1)

All dimensions in millimetres.

.--- -

------

TW

11)

P

Q

S

size

(2)

i

100x loo

125xlcO

150x loo

125x100

{

lOOx loo

150x loo

150x 150

P-TYPE,1 /

YPE

A

(3)

330

355

343

330

305

343

405

c D E F

a4 F’ G

(4) (5) (6) (7) (8) (9) (10) (11)

165 100 100 100 75 - - 360

185 100 125 100 75 340

200 100 150 100 75 - - 385

175 100 125 100 - 75

165 100 100 100 -

200 100 150 100 -

255 150 150 150

- 340

120 360

115 385

110 460 .

13

IS 651: 1992

Table 12 Dimensions of Square-Mouth Gully Traps jc%US~ 17.1)

Typr

(1)

P

Q

s

sh?

(2)

100x loo

12.5xlcn

150x 100

180x 100

180 x 150

125X100

i

125x100

150x 100

180x 150

‘VPE

A

(3) (4)

305 175

265 165

330 165

320 200

405 270

330 16s 100 125 100 - 80 -

290 165 100 125 loo - - loo

330 165 100 150 100 - - 115

445 275 150 180 i 5;: - - 12s

c d D u-.w (fw

(5) (‘5)

100 100

100 125

100 ! 50

100 180

150 ! 8C

E F F’

(8) (9? (1Oi

65 - -

60 - -

75 - -

65 - ._

15 - -_

G

(11)

330

345

346

380

520

345

345

346

520

IS 651: 1992

ANNEX A (Ckmse 7.4)

TEST FOR RESISTANCE TO ACIDS

A-O ?‘Ri!WIPLE

A-O.1 The test specimen is completely immersed in the test solution and the resistance to acid is deter- mined as the percentage of acid soluble matter ex- pressed as sulphate.

A-l REAGENTS

A-1.1 Nitric Acid - 6.30 percent, specific gravity 1.42.

A-l.2 Acetic Acid - 6.00 percent, specific gravity 1.05.

A-l.3 Hydrochloric Acid - 3.65 percent, specific gravity 1.19.

A-L4 Sulphuric Acid - 4.90 percent, specific grav- ity 1.84.

A-2 PREPARATION OF TEST SPECIMEN

A-2.1 Test specimen shall be sound tiith all edges freshly broken, free from cracks or shattered edges, about 5 cm square, not more than 200 g in mass, and shall be thoroughly cleaned with wire brush,

A-3 WEIGRING APPARATUS

A-3.1 The weighing shall be made on a balance accu- rate to 0.01 g when loaded with 200 g.

A-4 PROCEDURE

A-l.1 The specimens to’be tested shall be dried to a cc;nstant mass (M,) at a temperature not less than ‘,5@C. The specimens upon reaching constant mass shall1 be completely immersed in the test solution at the ambient temperature for a period of 48 hours. Then removed from the solution and carefully and fhor- oughly washed with hot distilled water, allowing the. wash to run into the solution in which specimens were immersed. The solution shall be filtered and to the filtrate shall be added 5 ml of concentrated sulphuric acid. The tilutioe shall then be evaporated (avoiding loss by ignition) and heated cautiously to dryness. It shall then be ignited to constant mass (MJ.

A-5 CALCULATION

A-5.1 The pe~~ntage of acid soluble matter, eqmssed as sulphate shall be calculated as follows:

Loss in mass % = Mass of residue (MJ

xl00 Mass of dry specimen (M,)

ANNEX B (Clawe 7.5)

TEST FOR ALKALI RESISTANCE

B-O PRINCIPLE

B-0.1 The resistance of stoneware pipes or fittings to alkali is determined by reacting it with magnesium sulphate solution.

B-l PREPARATION OF SAMPLE

B-l.1 Test samples measuring not less than 75 cm2 and not more than 130 cm2 shall be broken from the pipe or fittings. The samples shall be sound, free from cracks or surface defects.

B-2 REAGENTS

B-2.1 Saturated Solution of Magnesium Sulphate --Conforming to IS 2730 : 1977.

B-3 PROCEDURE

B-3.1 Heat the magnesiumsulphatc solution (specific gravity 1.295 to 1.3Ot3) to the boiling tempentu=. Place the test sample in a wire bsket and submerge it into the boiling solution; continue heating for two hours, Then remove the. sample and bring it to a constant mass in a drier or oven at a temperature ‘not less than 110%. Subject the test sampk to at least five cycles using fresh solution for each cycle. After the completion of five cycles remove the saqle fmm the solution, wash it and bring it to constant mass in a drier or oven at a temperature not less &an 1UPC. Air cool the sample and ohserve.

B-3.2 There shall be no evidence of pitting, softc~ spalling or cracking.

15

IS 651: 1992

ANNEX C (Clau.w 7.6)

CRUSHING STRENGTH TEST

C-l CRUSflING STRENGTH TESTING MACHINE

C-l.1 While the pipe to be tested is supported in a horizontal position on two hearings parallel to its axis, the load shall be applied to it along the length of the barrel through a third hearing on top of the barrel (see Fig. 9).

C-l.2 Any testing machine having a device that will apply the load at a uniform rate of abou! 30 (kN/m) min, or in increments of not more than SOONat thesamerate, maybeused formaking the test.

C-13 The testing machine shall be substantial and rigid throughout, so that the distribution of the load

will not be affected appreciably by the deformation or yieldingofrny part. Th,e bearings shall be as specified in C-1.4, C-1.5, C-l.6 and C-2.1, and shall be attached to the. machine so as to receive and uniformly transmit maximum loads required in the tests without lost motion, vibrations, or sudden shock. The machine and bearings shall he designed to transmit the load in a vertical plane through the longitudinal centre lines of the bearings and pipe.

C-l.4 The three hearings shall consist of a lower member, being a rigid beam on which two hearings

strips are symmetrically disposed parallel to a vertical plane passing tbrougb the longitudinal axis oftbe pipe, and an upper member also being a rigid bram, on which one bearing strip is centrcd and disposed so that it lies in the vertical plane passing througb the longitu- dinal axis of the pipe (see Fig. 9).

C-l.5 The beam on which the hearing strips arc dis- posed shall be structural steel beams single or of compound sections having moments of inertia about the vertical and horizontal axis of the cross section not less than those of WB250(se~ IS 808 : 19S9) arid \\ irt a width of flange not less than 200 mm.

C-l.6 Mild steel, teak ot similar hardwood shall b< used to face the upper flange oftbe bottom beam. The facingsball be straight and free nfwarpingor twisfing andsballbecentrallylocatedontbe flangeofthebcam by means of hardwood strips attached to its lower face and in contact with the edges o!‘Ihc flange. The cross section of the facing may have either of two shapes at the discretion of the pipe manufacturer.

Shape A shall be rectangular 280 x 35 111111 mini- mum, without a joint. Shape B is shown in Fig. 10.

A similar facing of shape A may be used to face

the lower flange of the uppet beam if dcsircd.

LOAD IN kg LOAD IN kg

LOAD IN kg I

fo01~7 0f A~PLI~A~I~N-.+

RUBBER STRIPS

Q CWUSWNG TF.ST RIG;

16

SECTION XX

IS 651 : 1992

C-2.1 ‘J‘ht bearing strips’shall consist of tubber cut or formed front material having sufficient h,rdness. The strips shall be of rectangular cross seci;ou having a width of 30 mm and a thickness of not less than 25 nun c,t more than 40 nm. The two bottom strips shall be of equal thickness.

C-2.2 The single top bearing strip shall be used with the 50 nmdinteusion in contact with the pipe. It may be positioned 011 the bearing by the use of wood or metal strips along its outside edges, provided the thickness of the positioning strips does not exceed one-half the thickness of the rubber bearing strip.

C-2.3 The two lowerbearingstrips shall be laid on the 50 nm diutensiou and may be positioned on the bearing with wood or metal strips between them and adjacent to their outside edges, provided the thickness of these positioningstrips does not exceed one-half the thickness of these rubber bearing strips. The two strips :bwllbeparralleland,whenusedwitl~afacingofShape ‘. ,.bitll ‘9, spaced a distance apart of approximately 1 m311 per 12 nuu of pipe diameter but in no case has than 2.5 mm. When used with Sbape B they shall be parallel and 25 mm apart for all pipe diameters.

C-2.4 The rubberbearingstrips may be attached to the facings, or in the case of the single upper strip, directly

to the upper beam, by adhesive if desired, provided, such method of attachment results in the strip reniain- ing firmly fixed in position whet) carrying the maxi- mm load.

C-3 APPLlCATION OF LOAD

C-3.1 The load shall be applied to the top bearing at a point distant front the spigot and of the pipe equal to one-half of the overall length of the pipe including the socket if any. The test load shall be applied to the top bearing in such a way that the bearing is free to rotate in vertical plane through tbe longitudinal centre line, of the top artd bottom bearings. In testing a pipe that is not straight it shall be placed betwee.n the bearings in the position that appears to give the most favourable bearing conditions for fair test.

c-3.2 The ‘,~~.,~!ig of the pipe shall be a continuous operation, and the pipe shall not be allowed to stand under load longer than is required lo apply the load and record the observations.

C-4 EVALUATION OF CRIJSHING STRENGTH

C-4.1 The ultimate crushing strength in kN per linear nletre shall be calculated by dividing the total applied load at fracture by the inside length of the barrel of the sa n?p!e bmkezl.

KS 651 : f992

ANNEX D

(Ch~e 0.1)

S4MPLING AND CRITERIA FOR CONFORMITY

D-l SCALE OF SAMPLING

D-1.1 Lot

Inanyconsignmrnt,allthepipesorfittingsofthesarne type, size and manufactured under similar conditions of production, shall be grouped together to constitute a lot.

D-l.2 The number of pipes or fittings to be selected at random from the 10,t depends upon the size of the lot and shall be in accordance with co1 1 to 4 of Table 13.

D-2 NUMBER OF TESTS

D-2.1 All the pipes or fittings selected as in D-l.2 shall be inspected for general quality (see S.l), dimensions (see Secticn A or Section B).

D-2.2 The number of pipes or fittings to be tested for hydraulic test (see 7.2) shall be 5 percent of the lot, as prescribed in D-2.2.

These pipes may be selected at random from those already selected in D-l.2 and suitable test specimens shall be selected from them.

D-2.3 The number of pipes or fittings to be tested for absorption (see 7.3) for resistance to action of acids (see 7.4) and of alkali (SW 7.5) and crushing strength {see 7.6) shall be as given below:

Lot Size Number of Sitw to be Testegf

up $0 150 2 !5! ” 300 3 301 ” 500 4 501 ” 1 CIOO

1001 ” 3OcKl 5 3 001 and above 8

These pipes may be selected at random from those already selected in D-l.2 and suitable test specimens shall be selected from them.

D-3 CRlTERL4 FOR CONFORMITY

D-3.1 A lot shall be considered as conforming to the requirements of ;he specification, if the conditions mentioned in D-3.2 to D-3.5 are all satisfied.

D-3.2 General Quality (see 4.1) and Dimensions (sqe Section A and Section B)

The number of pipes and fittings in the first sample (seecol2 and 3 of Table 13) shall be first selected and subjected to inspection for general quality and dimen- sions. If in the first sample the number of defectives, that is those failing either for general quality or dimen- sions, is less than or equal to the corresponding accep- tance number a, (co1 5 of Table 13) the lot shall be

Table 13 Sample Size and Criteria for Conformity (Clause D- 1.2)

IArt Slzc SBmplc SSWlDlC SL

C~UlatlVC Sample

She

(1)

up lo 150

(2) (4)

Firs1

Second

(3)

13 13

13 26

Genunl Qunllty (5.1) and Dtmawioms

(Secttom A & B)

A- % rl

(3 (6)

0 2 1 2

51 to 300 First 20 20 0 3

Second 20 40 3 4

301 lo500 First 32 32 1 4 Second 32 64 4 5

501 to 1000 First 50 50 2 5 Second 50 100 6 7

lcmJ1103cm First 80 80 3 7

Second 80 160 8 9

3 001 and First 1’5 125 5 9

above SecUIh? 125 250 12 13

Minor Blanlsha (5.2)

W-- 5 I:

(3 (8)

2 5 6 7

3 7 8 9

5 9 12 13

7 11 18 19

11 ! :., 26 . ?

17 L ,J 37 38

___- _-“- _- _. .

18

corresponding rejection number rz (co1 8 ofTa5k I?‘), the lot shall be considered as not conforming, If the number of defectives in the first san9ple lies between the corresponding 0, and I,, a secono sample (see co1 2 and 3 of Table 13) shall bk selected and subjected to Inspectron. !f in the combined sample. the numoer or‘ defectives is less than 01 equal to the corresy>ontding acceptance number cl;, the lot shall be considered conforming, 2nd ifthe number of defectives s greater thanor equal to the corresponding rejection :ILL~~SCI r:, the iot shall be considered as not conformin~~

D-3.6 For resistance 90 action of acids nr9d of macne- siun9 sulphate; all test specimens shail satisfy-the seqr:irements specified in ‘7.X end 7.5 respectivea?.

considered as conforming to the requirements of general quality and dimensions. If the number of defectives in the first sample is greaterthan oresual to the correspond9r9g rejection number rl (co1 6 of’Tabte 13). the lot shall be considered as not conforming. If the number of defectives in the first sample lies be- tween the corresponding (I, and I-,, a second sample (see co! 2 and 3 of Table 13) shall be selected bnd subjected to inspection. Ifin the combined sampie, the number of defectives is !ess than or equal to the corresponding rejection ilumber r9, the lot shall be considered as not conforming.

D-3.3 h&nor Blemiskes (SW 4.2:

The number of pipes and fittings in the first samp?e (see co! 2 and 3 of Table 13) shall be first selected and subjected to inspection for blemishes which do snot impair the strength, durability and serviceabiiity. 3f in the first san99ple the numberofdefectives is less thanor equal to the corresponding acceptance number a, (CO! 7 of Table 13), the jot shall be considered as con- forming to the requirements. If the number of defec- tives in the first sample is greater than or equa! to the

Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promote harmonious tl: \ elopmeni of the activities of standardization, marking and quality certification of goods and attending to conneiied matters in the country.

Copyright

BIS 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 rckiting 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 periodically; a standard alon, 0 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 Handbook’ and ‘Standards: Monthly Additions’.

This Indian Standard has been developed from DOC : NO. CLL, 3 ( 5035 I

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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Printed at Ptitograph, New Delhi, Ph : 5726847

AMENDMENT NO. 1 JUNE 1996 TO

IS 651: 1992 SALT-GLAZED STONEWARE PIPES AND FI’ITINGS - SPECIFICATION

(Fifth Rrvisim)

( First covet page ad page 1, Tide ) - Substitute the following for the existing:

‘GLAZED STONEWARE PIPES AND FI’ITINGS - SPECIFICATION’

(Page 1, clause 1.1, line 2) - Delete the word ‘salt’.

[ Page 1, clause 1.1(a) ] - SUbStiNk ‘Straight and taper pipes‘ for ‘Straight pipes’.

( Page 1, clause 2.1 ) - Add reference to ‘IS 4905 : 1968 Methods for random sampling’.

( Page 2, clause 6.1 ) - Delete the ‘NOTE’ appearing at the end of the clause and add the following at the end of the clause in place of the wotds ‘(see Note)‘:

’ ‘or glaze shall be ceramic glaze consisting of glazing material, applied prior to tiring’.

(Page 2, clause 7.2 ) - Suktitute the following for the existing:

‘7.2 When subjected to hydraulic test, straight pipes shall withstand the internal hydraulic test pressure of 0.15 MPa on the barrels and fitting covered in Section A and 0.075 MPa for fitting coveted in Section B, without showing signs of injury or leakage. The pressure shall be applied on pipes and fittings at a rate not exceeding 0.075 MPa in 5 set and full pressure shall be maintained for atleast 5 sec. Care shall be taken to ensure that all air is expelled before the test is commenced.’

( Page 2, clause 7.4 ) - Substitute the following for the existing:

‘7.4 Pipes and fittings shall be tested for acid resistance in accordance with the procedure given in Amtex A. The loss in mass shall not exceed 2.5 percent.

(Page 2, clause 8.1) - Substitute the following for the existing:

1

Amend No. 1 to IS 651: 1992

‘8.1 Scale of sampling and criteria for conformity of a lot shall be as prescribed in Annex D’

(Page 7, Tables 3 and 4, co1 1) - Put a bracket against Internal Diameters 250 and 300 as shown below:

‘250 ’ 3aJ

( Page 9, clause 13.2 ) -Add the following matter after 13.2 as follows:

‘13.3 Permissible Tolemnce on Bends

133.1 Tolerance on angles of bends shall be within t 3’.

133.2 Tolerance on dimension ‘t’ and ‘a’ of bends shall be as follows:

Dimenkms r and a, mm Permissible Variation, mm

up to loo *3

101 to 300 i5

301t0600 *7

(Page 9, clause 15.1, line 5 ) - Substitute ‘2.5 mm’ for ‘25 mm’

( Page 15, clause A-l ) - Delete clauses ‘A-1.1, A-l.2 and A-11.3’ and retain ‘A-W without clause No.

( Page 18 and 19, Annex D ) - Substitute for following for the existing Annex:

‘ANNEX D (Clause 8.1)

SAMPLING AND CRITERIA FOR CONFORMITY

D-l LOT

AI1 the pipes or fittings of the same type, size and manufactured under similar conditions of production, shall be grouped together to consitute a lot.

D-2 SCALE OF SAMPLING

The number of pipes or fittings to be selected at random ( see IS 4905 : 1%8 ) from the lot depends upon the size of the lot and shall be in accordance with co1 lto4ofTabk13.

2

Arnend No. 1 to IS 651: 1992

D-3 NUhfBER OF TESTS

D-3.1 All tbe pipes or fittings selected as in D-2 sball be inspected for general quality (see 5) and dimensions (see Section A or Section B, as relevant ).

D-3.2 The number of pipes or fittings to be tested for hydraulic test ( see 7.2 ) shall lx 5 percent of the lot, as prescribed in D-l. These pipes may be selected at random from those already selected in D-2.

D-33 Tbe number of pipes or fittings to be tested for water absorption ( see 7.3 ), for resistance to action of acids ( see 7.4), for resistance to action of alkali ( see 7.5 ) and crushing strength (see 7.6) sball be as given below:

Lot Size Number of P;pes to be Tested

up to 150 3

151 to 1200 5

1201to10ooo 8

These pipes may be selected at random from those already selected in D-2 and suitable test specimens prepared.

D-4 CRITERIA FOR CONFORMITY

D-4.1 A lot shall be considered as conforming to the requirements of tbe specification, if the conditions mentioned in D-4.2 to D-4.6 are satisfied.

D-4.2 Gene& Quality ( see 5 ) and Dimensions ( see Section A and Section B )

The number of pipes or fittings in the first sample ( see co1 2 and 3 of Table 13) shall he first selected and subjected to inspection for general quality and dimensions. lf in the first sample the number of defectives, that is, those failing either for general quality or dimensions, is less than or equal to tbe corresponding acceptance number a, ( co1 5 of Table 13 ), tbe lot sball be considered as conforming to the requirements of general quality and dimensions. If the number of defectives in the first sample is greater than or equal to the corresponding rejection number re ( co1 6 of Table 13 ), the lot shall lx considered as not conforming. lf the number of defectives in the first sample lies between the corresponding ac and re, a second sample (see co1 2 and 3 of Table 13 ), shall be selected and subjected to inspection. If in the combined sample, the number of defectives is greater than or equal to the corresponding rejection number re, the lot shall be considered as not conforming.

3

Amend No. 1 to IS 651: 1992

D-4.3 For the hydraulic test, all tbe specimens shall satisfy the requirements as specified in 7.2.

Table 13 Sample Size and Criteria for Conformity ( Chses D-2 and D-4.2 )

Lutsizc Smpk

(1) up to 150

151tO280

281 to 500

501 to t 200

12Olto3200

3201to10m

(2) First S@YJod

First SecOnd

First scmiKl

First

First SWlld

First swlld

Sampk size

(3) (4)

20 20 20 40

32 32 32 64

50 50 50 100

80 80 80 160

125 12.5 125 250

200 200 200 400

CUmUktiVC

Sample size

Ga~eml Quality (serS)~dDimensiam

(SectioasA&B) c .

ac r=’

(5 ) (6)

1 4 4 5

2 5 6 7

3 7 8 9

5 9 12 13

7 11 18 19

11 16 26 27

D-4.4 For water absorption test, the mean and the range (difference between the highest and tbe lowest value ) of the test results obtained shall be calculated and ( mesn +. 0.6 range ) shall be less than or equal to tbe maximum limit specified in 73.

D-4.5 For resistance to actions of acid and of alkali, all test specimens shall satisfy the requirements specified in 7.4 and 7.5 respectively.

D-4.6 For crushing strength test, all the test specimens shall satisfy the requirements as specified in 7.6.’

(CED3)

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