IS 11246 (1992): glass fibre reinforced polyester resins ...11551: 1986 11320: 1985 2.1 The following Indian Standards are necessary adjuncts to this standard: IS No. 1221 : 1971 1.1

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”

है”ह”ह

IS 11246 (1992): glass fibre reinforced polyester resins(GRP) squatting pans [CED 3: Sanitary Appliances and WaterFittings]

IS 11246 : 1992(Reaffirmed 2007)

~~

Cf)T:q ~~T~~~ ~~ ( ~T.~.qT. )m1Vr 1IT?I" -~

( q~~T tj~~)etUJ )

Indian Standard

GLASS FIBRE REINFORCED POLYESTERRESIN (GRP ) SQUATTING PANS —

SPECIFICATION

( First Revision )

UDC 696.141.1 [678.674.067-5]

BIS 1992

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

February 1992

©

Price Group 3

AMENDMENT NO. 1 DECEMBER 1998TO

IS 11246: 1992 GLASS FIBRE REINFORCEDPOLYESTER RFSIN (GRP) SQUA1TING PANS­

SPECIFICATION( FintRmsioltJ

( Page 2, Fig. 1, PLAN) - SubstiCute the foJJowing figure for tIaeexisting:

PLAN

(CE03)Repropa.-,~ BlS. Hew DeJJb. I.dia

Sanitary Appliances and Water Fittings Sectional Committee, CED 3

FOREWORD

This Indian Standard ( First Revision) was adopted by the Bureau of Indian Standards, after thedraft finalized by the Sanitary Appliances and Water Fittings Sectional Committee bad beenapproved by the Civil Engineering Division Council.

In view of the priority given for low-cost urban sanitation by Government of India, alternative andcompetitive materials ( other than the commonly used ceramic ones), lik-e ORP, PVC and HDPEare coming into usc. A large number of manufacturers have come forward to manufacture glassfibre reinforced plastic (GRP) squatting pans because of their lower cost and satisfactoryperformance,

This standard covering the pourft.ush type GRP squatting pans was first published in 1985 at theinstance of the Technology Advisory Group of the World Bank. In this revision, apart fromincorporating the Amendment No. 1 certain dimensions and tolerances on the same have beenmodified.

For the purpose of deciding whether a particular requirement of this standard is complied with, thefinal value. observed or calculated, expressing the result of a measurement, shall be rounded off inaccordance with IS 2 : 1960 'Rules for rounding off numerical values (revised I', The number ofsignificant places retained in the rounded off value should be the same as that of the specified valuein this standard.

IS 11246: 1991

Indian Standard

GLASS FIBRE REINFORCED POLYESTERRESIN (GRP) SQUATTING PANS

SPECIFICATION

( First Revision )

2 REFERENCES

1 SCOPE

3.11 Unevenness

Flushing surface.

3.10 Traces of Mending

The traces left over after mending car. jed out toeliminate small defects.

Unevenness and wrinkles present on the surface.

Pores of size Jess than 1 mm appearing on thesurface.

3.9 Surface

The material used in the manufacture of squattingpans other than the glass fibre, resin and pigmentspecified.

3.7 Impurities

The foreign matters present.

3.8 Pin Holes

3.6 Filler

3.S Defective Impregnation

Imperfect impregnation of glass fibre withunsaturated polyester resin.

Title

Dye based fountain pen inkst first revision)Specification for brush scrubbing(first revision)Household laundry detergentpowders ( ( second revision)Unsaturated polyester resinsystems for low pressure fibrereinforced plastics .Glass fibre rovings for thereinforcement of polyester andof epoxide resin systems

Glass fibre chopped strand matfor the reinforcement of polyes­ter resin systems

4955 : 1982

6746 : 1972

3015 : 1985

11551: 1986

11320: 1985

2.1 The following Indian Standards are necessaryadjuncts to this standard:

IS No.

1221 : 1971

1.1 This standard Jays down the requirements formaterial, construction, workmanship, finish,performance and testing for glass fibre reinforcedpolyester resin ( G RP ) pourflush type squattingpans contact moulded as well as compressionmoulded.

3 TERMINOLOGY

3.0 For the purpose of this standard. the follow­ing definitions shall apply.

3.1 Bubbles

Air bubbles entrapped in the pan.

3.1 Coating

A pigmented protective layer provided on thesurface.

3.11 Warpage

Distortion of original shape during the rrr-nufac­turing process.

4 MATERIAL

4.1 Glass Fibre

The glass fibre in the form of chopped strand mator ravings used in the manufacture of squat­ting pan shall be low alkali glass ( for example,E-glass) compatible with polyester resin (seeIS 11320: 1985 and IS 11551 : 1986 ).

3.3 Colour Blots

Colour blots appearing on the surface on theaccount of uneven distribution of colouringmaterial and uneven coating.

3.4 Cr8zlng

Fine hair crack( s ) on the surface.

4.1.1 The glass content of the laminate shall beminimum 30 percent by weight when testedaccording to the method described in 8.1.10.

4.2 Polyester Resin

Unsaturated polyester resin shall be isophthalictype ( see IS 6746 : 1972).

1

IS lIZ46: 1992

4.3 Sheet Mouldla. Compound ( SMC )

It is the material use4 for compression mouldedsquatting pans and shall be of low profile gradeand shall consist of glass fibre reinforcements pre"impregnated with filled unsaturated polyesterresin system in sheet form.

4.4 Surrace Coat

Any of the coats specified in 4.4.1 and 4.4.2 shallbe provided on the surface.

4.4.1 Gel-Coat

The gel-coat used shall be based on isophthalicgrade of polyester resin, resistant to chemicalsand suitably pigmented.

4.4.1 Polyurethane R.!;n Coat

The coat shall be two component polyurethanesuitably pigmented.

5 CONSTRUCTION

-of fibre-glass chopped strand mat or requisitequantity of rovings to build up a minimumthickness of \·S mm excluding surface coat,throughout the body of the pan, with additionalreinforcement at the rim and the bottom outlet.

S.l For compression moulded squatting pans theprocess shall be carried out using SMC (see 4.3 )and matched metal dies under required temper­ture and pressure.

S.3 Surrace Finish

The surface of the moulded pans shall be freefrom pin boles, unevenness, crazing. cracks,and resin areas. It shall contain no impurities.The surface shan be coated with high gloss,scratch and chemical resistant coating (s~e 4.4 ) ..Surface of the pan shall be smooth and free fromany sharp edges and unwanted curves, etc.

6 DIMENSIONS AND MASS

6.1 The squatting pan shall comply with theS.t The contact moulded or cold-pressed dimensions specified in Table 1 read with Fig. 1.squatting pan shall consist of two or more layers

----E----..jL ,--..--.,ct

x

PLAN SECTION XX

FIG. 1 SQl.fATTING PAN

Table 1 DlmeDllons of Squatting Pans

Description

( 1 )

Width of front profile (semi-circle)Width at rear profile ( semi-circle )Vertical drop in (ront wan of panIlear of back wall of the pan inclination to horizontal oft'

aet to trap openingLength of lop openinaSlope of bottom of panOverall depth of pan (s,. Note)

Lenlth of entrYor squattinl pan Into the P-trapDia a t entry (rom squattin. pan to P-CrapPrejected bend of rim all-round

NOTES:1 Dimension C) G and H are for Icneralguidance.1, Tolerance ± 4" for all dimensions of '0 mm and above.

( 2 )

A

BCD

EFGHJK

Dlmena.oUl(mm)(J )

t25200706-80

42525-28·32040 Min77,ID2()..2S

2

6.~ Thickness

The thickness of the GRP laminate including thesurface coat shall not be less than the values givenbelow:

i) With.gel coat - 2"0 mm

ii) With PU coat - l·S mm

6.2.1 At the point of additional reinforcement,that is rim and bottom outlet, the minimumthickness shan be 2·8 mm with gel coat and 2·6mm with PU coat.

6.3 Mass

The minimum mass of hand laid pans shallbe 750 gm and for sheet moulding compound( SMC ) shall be 900 gms.

7 PERFORMANCE REQUIREMENTS

7.1 Warpage

The squatting pan shall be considered to be withinwarpage limit if a feeler gauge of 4 mm does notslide under it without application of force whentested according to 8.2.1.

7.2 Thickness

The thickness of the pan shall be measured onthe pieces cut from the pan at ten different pointsand minimum thickness shall conform to 6.1.

7.3 Impact Resistance

Two test pieces cut from the side or bottom ofthe squatting pan shall be subjected to impacttest in accordance with 8.1.1. The test pieces oninspection shall not show any cracks in thesurface coat.

7.4 Crazing

A complete squatting pan or a test piece takenfrom any part of it shall not show on visualinspection and signs of cracking or crazing afterthe oven test conducted in accordance with 8.1.3.

7.5 Water Absorption

The squatting pan shall not absorb water inexcess of O·S percent when tested in accordancewith 8.2.4.

7.6 Gel Coat

The gel coat, when provided, shall not be lessthan 0·20 mm thickness and not more than 0'40rom in thickness when determined in accordancewith 8.2.5.

7.7 Resistance of Hydrocholorlc Acid/Uric Acid

There shall be no discoloration and exposure ofglass fibre, on subjecting to the tests forhydrochloric acid and uric acid as describedin 8.2.6 and 8.2.7 respectively.

IS 11146: 1991

7.8 Hardness

The squatting pan get coat surface and backingshall show a minimum reading of 30 points( 20 points for polyurethane coated surface) on aBarcol Impressor when tested in accordancewith 8.2.8.

7.9 Scratcb Reslstanct

Squatting pans shall withstand 40 000 cycles inthe scrub test, described in 8.2.9 slight brushmark~ at the completion of the test, may bepermitted.

8 INSPECTION TESTS

8.1 VisuallolpectioD

The surface of the squating pan shall be visuallyInspected for defects after being inked in accord­ance with 8.1.1. The light source shall be practi­cally diffused day light, supplemented, is!1eces~ary., with diffused artificial light to provideillumination comparable to that usually availablewithin a short distance of the outside windowfacin~ n<:>rth but not in direct sunlight. Theillumination shall have an intensity of 1 000to 2 000 lux. Ink stains and the defects men­tioned at 5.3 shall not be permitted.

8.1.1 lnk~Test

To do the visual examination of the surface ofsquatting pan, ink is applied to the area to beinspected as follows:

a) Wash the entire area to be inspected with awater soluble ink (see IS 1221 : 1971 )and allow to dry completely,

b) Rinse the surface with fresh water andexamine, Ink win be 'entrapped in crazing,cracks. pores, etc.

NOTE - In this standard, all reference to visibledcfect.s shall refer to defects apparent to the eye uponclose Inspection, after the surface has been ink-tested.

8.1 Laboratory Tests

8.2.1 Warpage

The squatting pan shall be placed face down ona flat surface preferably a surface plate toascertain the": amount of deviation from thehorizontal plane that exists an the edge of thepan. If the pan rocks on two points, a horizontalplane shall be determined by placing a feelergauge of 4 rom under one low corner and forcingthe pan down on this gauge. A second feelergauge shall be inserted under the opposite edgeto check for performance requirement specifiedunder 7.1.

3

IS 11246 : 1992

8.1.1 Impact

The test pieces shall be tested at room tempera­ture of 27 ±2°C by supporting and clamping themfirmly in a 125 mm dia frame. A 38 mm dia steelball, weighing 225 g shall be dropped on thecentre of the panel from a height of 1SO mm tostrike the reverse side and from a height of7S mm to strike the surface. Two differentsamples shall be used for the two tests. After thedrop of the ba 11, the presence of crack shall bedetermined by applying the ink test to theaffected area (.see 8.1.1 ) and carefully examiningthe area for conformity with 7.3.

8.Z.3 Oven Test f01 Crazing

After keeping the pan or a test piece for 10. daysin a circulating air oven maintained at 80.:t:2°C,the test pieces shall be inspected for conformitywith 7.4.

8.2.4 Water Absorption

Test pieces shall be cut to size 50 x 50 mm or areaof dia 30 mm, the exposed edges of the testpieces shall be coated with resin to prevent inter­laminar attack. The sections of the pieces shallbe cleaned, dried for 24 hour 'in air bath atSO ±3°e and then allowed to cool in a desiccator.Following this the pieces shall be weighedimmediately with the help of a chemical balance.Next the test pieces shall be immersed in distilledwater for 24 h at 27 ±2°C test piece then shallbe taken out, the wa'er wiped out with a piece ofdry cloth and weighed immediately. Theabsorption coefficient shall be determined fromthe following:

A.c:: M.,-Ml x 100Ml

where

A = absorption coefficient ( percent ),

Ml = mass before immersion, and

M. = mass after immersion.

8.1.5 Gel-Coat Thickness

The thickness of the gel-coat shall be measuredby cutting 8 test section from the areas to bemeasured and sand-papering the edge of thesection until smooth. A suitable measuring deviceshall be kept across the edge, perpendicular tothe plane of the gel-coat and the thickness of thegel-coat shall be measured with the aid of readingglass. if needed, for conformity with 7.6.

8.1.6 Test for Hydrochloric Acid

One millilitre of hydrochloric acid of 3 percentconcentration is placed on the test piece andinspected after 60 minutes. Following thisinspection, the surface hardness shall be tested asper 8.2.1.

8.1.7 Test for Uric Acid

One miJlilitre of uric acid of 0'06 percent con­centration is placed on the test piece and inspect­ed after 60 minutes. 'following this inspection,the surface hardness shall be tested as per 8.2.8.

8.Z.8 Hardness

With the indentor perpendicular to the testsurface, a Jight hand pressure is exerted againstthe instrument to drive the spring load indentorinto the material and the hardness dial reading istaken immediately and recorded. An average ofat least 5 tests shall be used for determininghardness for conformity with 7.8.

8.2.9 Scrub Test

The general construction of the equipment shallbe as given in Fig. 2A. Dimensions and otherdetails of scrubbing brush shall be as given inFig.2B.

Fix the specimen in the tray rigidly such that thesurface is horizontal and adjust the brush heightso that it just touches the specimen in verticalposition. Then lower down the brush by 10 mmso that it exerts a positive pressure on the speci..men and also passes over the specimen to andfro describing a scrubbing path of at least 70 mm,Fill the specimen tray with 0·5 percent detergent(Grade I of IS 4955 : 1982) solution made withdistilled water till the sample is immersed, Startthe test with the counter reset to zero and stop at40 000 cycles (80 000 strokes). Add detergentsolution in between the test so that the specimenis immersed throughout the testing. Immediatelyafter completion of (est, wash the test specimenin tap water and inspect the specimen forconformity with 7.9.

8.2.10 Glass Content

The glass content in the laminate shall be deter­mined using the following procedure. Thespecimen is first weighed on an analytical balancein a previously weighed, ignited crucible. Thespecimen is placed in the furnace at a temperaturenot greater than 345°C. The temperature of thefurnace is raised to 56S± 25°C, at a rate that willnot cause blowing or loss of inorganic filler. Thespecimen and crucible are then ignited at thismaximum temperature to constant mass (2-6hours depending on the thickness) and allowedto cool in a desiccator. The residue shall beweighed.

Glass content, mass ( %)= ~: x 100

whereMl = residue mass, andMe = original mass.

9 PACKING

9.1 The squatting pans shall be wrapped withpolythene sheets and then packed securely inlots of suitable numbers in cardboard or othercartons to avoid damage in transit.

4

t,--I

.....•.

STROKE COUNTER

IS 11246: 1992

BRUSH ASSEMBLY

/TRAV FOR HOlO'NG~.// SPECIMEN

~------------ 840 -_.-J

PLATFORM

WOODEN SUPPORTS(6 NO.)

All dimensions in millimetres,

FIG. 2A T"PICAL SCRuu-TESTING EQUIPMENT

.....-WOOOEN/ HANOLE

150

25

/BASf

STIFF BASSINfF'BRES AS PERIS 301S~'981j

BUTT CUTIWEIGHT 20 s min 1

All dimcnsions in millimetres.

Flo. 28 TYPICAL SCRUBBING BRUSH

5

IS 11246: 1991

1% MARKING

11.1 Each pan shall be clearly marked by transfixlable, on the rear top outside surface, with thename or trade-mark of the manufacturer, data ofmanufacture, balch number and mass of pan.

12.1.1 Each squatting pan may also be markedwith the Standard Mark.

11.1.4.1 Characteristics requiring lion-destructivetesting

Each of the pans selected according to col l and2 of Table 2 shall be examined for requirementsspecified in 5.3, 6.1, 6.2, 6.3 and 7.1. A pan failingto satisfy one or more of these requirements shallbe considered as defective. The lot shall be con­sidered as defective. The lot shall be consideredto have satisfied these requirements if the numberof defective found in the sample is less than orequal to the corresponding acceptance numbergiven in col 3 of Table 2. The lot having satisfiedthese requirements shall be further tested forother requirements according to 11.2.4.1.

I J.2.4.2 Each of the pans given in col 4 ofTable 2 shall be tested for requirements requiringdestructive testing that are given in 7.3, 7.6 and7.9. These pans may be selected from thosealready examined according to 11.1.4.1 and foundsatisfactory. The Jot shall be declared as con­forming to the requirements of these specificationif there is no failure.

11.2.3.1 These pans sha'I be selected at randomfrom the lot. In order to ensure the randomnessof selection, procedures given in IS 4905 : 1968may be followed.

11.2.4 Number of Tests and Criteriafor Conformity

11.1.3 TQe number of pans to be selected from aJot shall depend on the size of the lot and shallbe according to Table 2.

Clause Frequency7 4 5 pieces per month7.5 S pieces for every

six months4.1.1 I piece per month

Characteristics8) Crazingb) VVater absorp­

tionc) G lass content

11.2.1 Lot

All pans. in a single consignment of the same size,manufactured essentially under similar conditionsof manufacture and produced in a day shallconstitute a lot.

11.1.1 The manufacture or supplier shall furnishto the testing authority the same number ofsamples as given in )1.1.1. They shall be selectedat random from a mouth's or six months' pro­duction as the case may be and subjected tovarious type tests given in 11.1.1.

11.1.1.1 If all the samples tested accordingto 11.1.1 pass the requirements of the type testsgiven in the specification, the type of pan underconsideration shall be considered eligible for typeapproval. In case of failure, the manufacturer orsupplier may be asked to improve the design andre-submit the product for type approval.

11.1 Acceptance Tests

Acceptance tests are carried out on samplesselected from a lot for the purpose of determin­ing the acceptance or otherwise of the lot.

11 SAMPLING

11.1 Type Tests

Type tests are intended to prove the suitabilityand performance of a new composition. a newtechnique or a new size of pan.

J 1.1.1 The frequency of testing for various typetests to be conducted by the manufacturer is given.

below:

10 MANUFACTURER·S INSTRUCTIONS 11.2.1 For ascertaining the conformity of thematerial in the lot to the requirements of the

10.1 The pan manufacturer shall furnish with specification, samples shall be tested from eacheach squatting pan, suitable instructions for its lot separately.cleaning and maintenance, Abrasives and scour­ing powders shall not be used.

Table 2 Scale of SlmpiiDI and Permissible Number of DcrcctJYCI( Clause 11.2.3)

Number of Pans In the Lot

( J )

Up to SO51 to 100

101 to 300301 to soc'01 and above

For Characteristics Given In5.3, 6.1, 6.2, 6.3 and 7.1

r-------A-------~Sample Size Acceptance

Number(2) (3)

2 03 0S 08 0

13 1

Sample Size for CharacterlltlcsGiven In 7.3, 7.6 and 7.9

(4)

11233

6

Standard Mark

The use of the Standard Marje is governed by (he provistons of the 8UT~au of India"Standards Act, 1986 and the Rules and Regulations made thereunder. The Standard Mark onproducts covered by an Indian Standard conveys the assurance that they have been producedto comply with the requirements of that standard under a well defined system of inspection,testing and quality control which is devised and supervised by DIS and operated by theproducer. Standard marked products are also continuously checked by BIS for conformityto that standard as a further safeguard. Details of conditions under which a licence for thouse of the Standard Mark may be granted to manufacturers or producers may be obtainedfrom the Bureau of Indian Standards.

Bureau of lodla. Standard.

BIS is a statutory institution established under the Bu'~au oJ Indian Standards Act, 1986 to promoteharmonious development of tho activities of standardization, marking and quality certification of goodsand attending to connected matters in the country.

Copyrl&ht

DIS has the copyright of all its publications. No part of these publications may be reproduced inany form without the prior permission in writing of BIS. This docs not preclude the free use, in thecourse of implementing the standard, of necessary details, such as symbols and sizes) type or gradedesignations. Enquiries relating to copyright be addressed to the Director ( Publications ), BIS.

Revision of Indian Staadard.

Indian Standards are reviewed periodically and revised, when necessary and amendments, if any, areissued from time to time. Users of Indian Standards should ascertain that they are in possession ofthe latest amendments or edition. Comments on this Indian Standard may be lent to HIS giving thefollowing reference :

Doc: No. CEO 3 ( 5043 )

AmeDdmeatl Issued Since Publication

Amend No.

Headquarters:

Dato of Issue

BUREAU OF INDIAN STANDARDS

Text Affected

Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002Telephones: 331 0 I 31, 331 13 75

Regional Office.:

Central: Manak Bhavan, 9 Bahadur Shah Zafar MargNEW DELHI 110002

Eastern: 1/14 C. I. T. Scheme VII M, V. I. P. Road. ManiktolaCALCUTTA 700054

Northern: SeQ 44S-446, Sector 3S-C. CHANDIGARH 160036

Southern: C. I. T. Campus, IV Cross Road, MADRAS 600113

Western: Manakalaya, E9 MIDC, Marol, Andheri ( East)BOMBAY 400093

Telegrams: Manaksanstha( Common to all Offices)

Telephone

{331 01 31331 13 75

37 16 62

" 53 38 43

235 02 16

6 32 92 95

Branches: AHMADABAD. BANGAlORE. BHOPAL. 8HUBANESHWAR. C01MBAT01~B.

FARIDABAD. GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR.LUCKNOW. PATNA. SRINAGAR. THIRUVANANTHAPURAM.

Printed at Printrade, New Delhi,lndia