MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG, NEW DELHI

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG, NEW DELHI 110002 य प च ल म द ह द भ : द ईड 50/ट - 90 24 11 2015 त पम प द त : कटप प त षय द त, द ईड 50 र त कत त : 1 स व ल इ ज न यर व भ ग पररष क च रख ल द य 2 ईड 50, ईड 50:1 ए ईड 50:2 क भ द य 3 च रख ल अ य न क य ह य(य ), न सल खत भ रत य म क म द ल : र ख द य श षप द ईड 50(8066)WC उ म ख UNPLASTISIZED ल र इड (प -ओ ) प इ दब म प क क सलए - व स टत क पय इ म क क अ ल क कर और अप म मनतय य बत त ए भ ज कक यदद य म क क प म रक स त त इ पर अमल कर म आपक य य अथ क र ब र म क य कद इय आ कत म मनतय भ ज क अ नतम नतचथ 24 ज र 2016 म मनत यदद क ई त क पय अध त षर क उपरसल खत पत पर लग फ म ट म भ ज य ईम ल कर द यदद क ई मनत र त त अथ मनत म क ल भ ष ब ध ट दट ई त उपर त रल ख क यथ त अ नतम प ददय ज एग यदद म त तक क रक नत क ई त व षय समनत क अ यष क पर म त अथ उ क इ छ पर आग क क यत क सलए व षय समनत क भ ज ज क ब द रल ख क अ नतम प द ददय ज एग य रल ख भ रत य म क य र क ब इट पर भ ध य द य (ब प द ह ) र ख ( द ज मय ) e-mail : ced@bis.org.in द म : उ च खखत

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG, NEW DELHI 110002 DOCUMENT DESPATCH ADVICE DRAFTS IN WIDE CIRCULATION Reference Date TECHNICAL COMMITTEE: CED 50/T- 90 24 November 2015 Plastic Piping Systems Sectional Committee, CED 50 ADDRESSED TO: 1. All Members of Civil Engineering Division Council, CEDC 2. All Members of CED 50 3. All others interested Dear Sir (s), Please find enclosed the following document: Doc No. Title CED 50 (8066 )WC ORIENTED UNPLASTISIZED POLYVINYL CHLORIDE (PVC-O) PIPES AND JOINTS FOR THE CONVEYANCE OF WATER UNDER PRESSURE SPECIFICATION Kindly examine the draft and forward your views stating any difficulties which you are likely to experience in your business or profession, if this is finally adopted as National Standards. Last Date for comments: 24 January 2016. Comments if any, may please mailed to dbhadra@bis.org.in In case no comments are received or comments received are of editorial nature, you will kindly permit us to presume your approval for the above document as finalized. However, in case comments of technical in nature are received then it may be finalized either in consultation with the Chairman, Sectional Committee or referred to the Sectional Committee for further necessary action if so desired by the Chairman, Sectional Committee. The documents are also hosted on BIS website www.bis.org.in. Thanking you, Yours faithfully, Encl: as above (B K Sinha) Head (Civil Engg.) email : ced@bis.org.in

FORMAT FOR SENDING COMMENTS ON THE DOCUMENT [Please use A4 size sheet of paper only and type within fields indicated. Comments on each clause/sub-clause/ table/figure, etc, be stated on a fresh row. Information/comments should include reasons for comments, technical references and suggestions for modified wordings of the clause. Comments through e-mail to dbhadra@bis.org.in shall be appreciated.] Doc. No.: CED 50(8066) C BIS Letter Ref: CED 50/T- 90 Dated: 24 November 2015 Title: Wide Circulation Draft of ORIENTED UNPLASTISIZED POLYVINYL CHLORIDE (PVC-O) PIPES AND JOINTS FOR THE CONVEYANCE OF WATER UNDER PRESSURE SPECIFICATION Name of the Commentator/ Organization: Clause/ Para/ Table/ Figure No. commented Comments/Modified Wordings Justification of Proposed Change

Doc: CED 50(8066) Draft Indian Standard ORIENTED UNPLASTISIZED POLYVINYL CHLORIDE (PVC-O) PIPES FOR THE CONVEYANCE OF WATER UNDER PRESSURE SPECIFICATION BIS 2015 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 November 2015 Price Group xx

For BIS Use Only Doc: CED 50(8066 ) November 2015 BUREAU OF INDIAN STANDARDS DRAFT FOR COMMENTS ONLY (Not to be reproduced without the permission of BIS or used as an Indian Standard) Plastic Piping Systems Last Date for Comments: Sectional Committee, CED 50 24 January 2015 Draft Indian Standard ORIENTED UNPLASTISIZED POLYVINYL CHLORIDE (PVC-O) PIPES AND JOINTS FOR THE CONVEYANCE OF WATER UNDER PRESSURE SPECIFICATION FOREWORD In the formulation of this standard, considerable assistance has been derived from ISO 16422 : 2014(E) Pipes for the Conveyance of Water Under Pressure Specification Oriented polyvinyl chloride (PVC O).The sizes of pipes however have been kept as per manufacturing practices being followed in India. This standard does not purport to address all the safety problems associated with its use. It is the responsibility of the users of this standard to establish appropriate safety and health practices and determine the applicability of regulatory safety and health practices and determine the applicability of regulatory limitation prior to use. For the purpose of deciding whether a particular requirement of this standard is compiled 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 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.

Draft Indian Standard Doc:CED50(8066) November 2015 ORIENTED UNPLASTISIZED POLYVINYL CHLORIDE (PVC-O) PIPES AND JOINTS FOR THE CONVEYANCE OF WATER UNDER PRESSURE SPECIFICATION 1. SCOPE 1.1 This standard specifies the requirements of pipes and joints made of oriented unplasticized poly(vinyl chloride) (PVC-O), for piping systems intended to be used underground or above-ground where not exposed to direct sunlight, for water mains and services, pressurized sewer systems and irrigation systems. The piping system according to this standard is intended for the conveyance of cold water under pressure, for drinking water and for general purposes up to and including 45 C, and especially in those applications where special performance requirements are needed, such as impact loads and pressure fluctuations, up to pressure of 25 bars. Joints constructed of other materials should meet their own relevant standards in addition to the fitness-for-purpose requirements of this Indian Standard. 1.2 When used under the conditions for which they are designed, materials in contact with, or likely to come into contact with, drinking water shall not constitute a toxic hazard, shall not support microbial growth and shall not give rise to any unpleasant taste or odour, cloudiness or discoloration of the water. Where applicable, pipes and their joints and the sealing rings shall conform to the current national regulations concerning materials in contact with drinking water. NOTE 1 The producer and the end-user can come to agreement on the possibilities of use for temperatures above 45 C on a case-by-case basis. 2. REFERENCES The standards listed in Annex A contain provisions which, through reference in this text, constitute provision of this standard. At the time of publication the editions indicated were valid. All standards are subject to revision and parties to agreement based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated in Annex A. 3. TERMS AND DEFINITIONS For the purposes of this document the following terms and definitions apply. Table 1

Abbreviations, terms and definitions which are applicable to this standard. Term Abbreviation Definition Orientation λ a Is the ratio between the length of the test piece level in axial before heat treatment and the lowest measured direction length after the heat treatment: λa = lo / li. Orientation Λ r Is the ratio between the circumfirence of the test level in in piece before (d co ) and after (d ci ) heat treatment: λr = tangential d co / d ci. The orientation ratio in tangental direction direction is the lowest measured value. Nominal dn Specified diameter assigned to a nominal size. diameter Outside de Value of the measurement of the outside diameter diameter at any through its cross-section at any point of a pipe, point rounded up to the nearest 0,1 mm Mean outside dem Value of the measurement of the outer diameter circumference of a pipe or spigot end of a fitting in any cross-section, divided by π ( 3,142), rounded up to the nearest 0,1 mm Minimum dem,min The minimum value of the mean outside diameter as outside diameter specified in this document. The value is equal to the nominal outside diameter dn and is expressed in mm Maximum dem,max The maximum value of the mean outside diameter as outside diameter specified in this document. The value is equal to the nominal outside diameter dn and is expressed in mm Inside diameter d i Value of the measurement of the inside diameter At any point through its cross-section at any point of a pipe, rounded up to the nearest 0,1 mm Wall thickness e Value of the wall thickness of the pipe or fitting. Tolerance out- dem,max dem,min of- roundness Measured out of Difference between the measured maximum and the roundness measured minimum outside diameter in the same cross-section of a pipe. Tolerance Permitted variation of the specified value of a quantity expressed as the difference between the permitted maximum and the permitted minimum value Standard SDR Numerical designation of a pipe series which is a dimension ratio convenient round number approximately equal to the dimension ratio of the nominal outside diameter, dn, and the nominal wall thickness, en Note: The standard dimension ratio, SDR, and the pipe series S are related as given in the following equation:

SDR = 2 S + 1 Pipe series S Dimensionless number for pipe designation. Note: The pipe series S is related to a given pipe geometry as given in the following equation: S = SDR-1/2 = d n -e n /2xe n Lower σlpl Quantity with the dimension of stress, which prediction limit represents the 97,5% lower confidence limit of the predicted hydrostatic strength for a single value at a temperature T and a time t (respectively 20 o C and 50 years) Note1. To entry: It is denoted as σlpl= σ(t,t,0,975) Note 2 to entry:the value of this quantity is determined by the method given in ISO 9080 Minimum MRS Required valueofσlpl for a T=20 o C and a time t required of 50 years. strength Note 1 to entry: For a particular material, its MRS is established from the value of σlpl rounded to the next lower value of the R10 series from ISO 3:1973, when σlplis less than 10MPa, or to the next lower value of the R 20 series when σlplis greater than 10 MPa. Design C Overall coefficient with a value greater than 1.0, coefficient which takes into consideration service conditions as well as properties of the components of a piping system other than those represented in the lower predictive limit (LPL) Design stress σ s Allowable stress for a given application at 20 C and t=50 years. Note 1: It is derived from the MRS by dividing it by the coefficient, C, using the following equation: σ s = MRS/C Nominal PN Numerical designation used for reference purposes pressure related to the mechanical characteristics of a component of a piping system Note 1: A pressure in bar, numerically equal to PN is identical to the (maximum) allowable working pressure (PFA). Note 2: For plastics piping systems, it corresponds to the allowable operating pressure, in bar 1), conveying water at 20 C during 50 years, as given in the following equation: PN = 20 MRS x e n / C(d n -e n ) MRS is expressed in MPa, PN is also expressed in MPa Allowable PFA Maximum hydrostatic pressure which a component operating pressure is capable of withstanding continuously in service (excluding surge). Note: For water temperatures up to and including

25 C: PFA = PN For water temperatures above 25 C: PFA: PFA = ft PN where ft is the derating factor depending on water temperature; PN is the nominal pressure. In cases where a further derating factor for application is required: PFA = fa ft PN, where fa is the factor depending on the application. Allowable Site PEA Maximum hydrostatic pressure which a newly Test Pressure installed component is capable of withstanding for a relatively short duration, in order to ensure the integrity and leaktightness of the pipe line. Type Tests Tests carried out whenever a change is made in the composition or in the size/series in order to establish the suitability and the performance capability of the pipe. Acceptance Tests carried out on samples taken from a lot for the Tests Virgin Material Own Material Rewo rk purpose of acceptance of the lot. Material in such form as granules or powder that has not been subjected to use or processing other than that required for its manufacture and to which no reprocessible or recyclable material(s) have been added. Material prepared from rejected unused pipes, including the trimmings from the production of pipes, which will be reprocessed in a manufacturer s plant by a process such as extrusion and for which the complete formulation is known. 4. MATERIAL 4.1 General The material from which the pipes and joints are made shall be PVC-U compound/formulation. This compound/formulation shall consist substantially of PVC-U resin/powder to which shall be added only those additives necessary to facilitate the production of pipes and fittings in accordance with this Indian Standard. All additives shall be uniformly dispersed. 4.2 Rework material The use of the manufacturer s own reprocessed material, produced during the manufacture and works testing of products and conforming to the material requirements of this International Standard, is permitted. Reprocessed or recycled material obtained from external sources shall not be used

4.3 VCM Content The monomer content (VCM content) in the resin shall be within the limits specified in 3.3.1 of IS 10151, when tested as per Annex A of IS 10151. 4.4 K Value The composition shall be based on PVC resin having a K-value 64 for pipes NOTE A test report or conformity certificate may be obtained from the resin manufacturer for the VCM content (see 4.3) and K - value (see 4.4) of the resin being used, unless the same is tested in an independent laboratory. 4.5 Density The oriented polyvinyl chloride pipe compounds containing additives such as modifiers, lubricants, fillers, etc, from which the pipes are to be manufactured, shall have a density between 1 350 kg/m 3 to 1 450 kg/m 3, when tested in accordance with IS 12235 (Part 14). 4.6 Classification of Materials Oriented pipes shall be made of PVC-U with a well-defined orientation level in circumferential and axial direction. The classification and verification of the MRS value shall comply to the requirements as per table 2. Among other things this means that the pipe material shall be subjected to tests with internal pressure according to series. Pipe material classification number Table 2 Material Classification (Clause 4.6) 315 355 400 450 500 MRS MPa 1 31.5 35.5 40.0 45.0 50.0 C 1.6 2.0 1.6 2.0 1.6 2.0 1.4 1.6 2.0 1.4 1.6 2 σ s MPa 20 16 22 18 25 20 32 28 23 36 32 25 1 Higher MRS classes can be chosen, provided they fall in the R20 range of ISO 3:1973. 5. CLASSIFICATION OF PIPES The pipe shall be classified by pressure rating (Nominal Pressure) at 27 0 C. The nominal pressure PN, the pipe series S and the design stress, σ s, are connected by the following relationship. PN = 20 MRS x e n / C(d n -e n ) S = (SDR-1)/2 = (d n -e n )/2xe n SDR = 2 S + 1 σ s = MRS/C

where e n d n is expressed in millimetres (mm); is expressed in millimeters (mm); PN is expressed in megapascals (MPa); MRS is expressed in megapascals (MPa); C is non dimensional; The nominal pressure, PN, of a pipe shall be designated in accordance with Table 3, depending on the diameter of the pipe and the pipe series S. NOTE When the design stress σs is expressed in megapascals, the value of the nominal pressure Corresponds to a pressure in bars. Table 3 Nominal Pressure of Pipes PN Design Nominal Coefficie nt Diameter C dn (Clause 5) Nominal Pressure Pipe series / SDR 32.0 28.0 25.0 22. 20. 18. 16. 14. 12. 11. 10. 9.0 8.0 / / / 4 0 0 0 0 5 2 0 / / 65 57 51 / / 41 / 37 / 33 / 29 / 26 / / 21 19 17 45. 23. 8 4 Material classification number - 315 1.6 90 -- -- PN8 -- PN -- PN -- PN -- PN -- 12. 10 5 16 20 PN6 > 90. -- PN8 -- PN -- PN -- PN -- PN -- 12. 3 10 5 16 20 PN6 2.0 90 -- --. -- PN -- PN -- PN -- PN -- 12. 3 8 10 5 16 PN6 > 90 PN5 --. -- PN -- PN -- PN -- PN -- 12. 3 8 10 5 16 Material classification number - 355 PN 1.6 90 -- PN8 -- 1 -- PN -- PN -- PN -- 12. 0 5 16 20 PN > 90 -- PN8 -- 1 -- PN -- PN -- PN -- 0 12. 5 16 20 PN2 5 -- PN2 5 -- PN2 5 PN2 5 PN2 0 PN2 0

PN6 PN PN2 2.0 90 --. -- 8 -- PN -- PN -- PN -- 0 -- 12. 3 10 5 16 PN6 PN PN2 > 90 --. -- 8 -- PN -- PN -- PN -- 0 -- 12. 3 10 5 16 Material classification number - 400 PN1 1.6 90 -- -- 0 -- PN -- PN -- PN -- PN -- -- 12. 5 16 20 25 PN1 > 90 PN8 -- 0 -- PN -- PN -- PN -- PN -- -- 12. 5 16 20 25 2.0 90 -- -- PN8 -- PN -- PN -- PN -- PN -- 12. 10 5 16 20 PN6 > 90. -- PN8 -- PN -- PN -- PN -- PN -- 12. 3 10 5 16 20 Material classification number - 450 PN1 1.4 90 -- -- 2 -- PN -- PN -- PN -- -- -- --.5 16 20 25 > 90 1.6 90 -- > 90 -- PN1 0 -- PN1 0 -- PN1 0 -- 2.0 90 -- PN8 -- > 90 -- PN8 -- PN2 5 PN2 5 PN1 2 -- PN -- PN -- PN -- -- -- --.5 16 20 25 PN 1 -- PN -- PN -- PN -- -- -- 2.5 16 20 25 PN 1 -- PN -- PN -- PN -- -- -- 2.5 16 20 25 PN 1 -- PN -- PN -- PN -- 12. 0 5 16 20 PN 1 -- PN -- PN -- PN -- 12. 5 16 20 0 Material classification number - 500 PN1 1.4 90 -- 2 --.5 6 20 25 > PN1 90 -- 2 --.5 6 20 25 1.6 90 -- -- > 90 PN1 0 -- 2.0 90 -- -- PN2 5 -- PN2 5 -- PN 1 -- PN -- PN -- -- -- -- -- PN 1 -- PN -- PN -- -- -- -- -- PN1 2 -- PN -- PN -- PN -- -- -- --.5 16 20 25 PN1 2 -- PN -- PN -- PN -- -- -- --.5 16 20 25 PN1 0 -- PN -- PN -- PN -- PN -- -- 12. 5 16 20 25

> 90 PN8 -- PN1 0 -- PN -- PN -- PN -- PN -- -- 12. 5 16 20 25 Nominal Pressure Working Pressure PN 5 0.5 MPa (5 kg/cm 2 ) 0..63 MPa (6.3 PN 6.3 kg/cm 2 ) PN 8 0.8 MPa (8 kg/cm 2 ) PN 10 1.0 MPa (10 kg/cm 2 ) 1.25 MPa (12.5 PN 12.5 kg/cm 2 ) PN 16 1.6 MPa (16 kg/cm 2 ) PN 20 2.0 MPa (20 kg/cm 2 ) PN 25 2.5 MPa (25 kg/cm 2 ) NOTE The above pipes are recommended for water temperatures ranging from +1 to +45 C. At higher temperature up t o 45 C, the strength of the pipe reduces and the working pressure shall be modified in accordance with Fig. D-1. Occasional rise in temperature as in summer season with concurrent corresponding reduction in temperature during nights has no deleterious effect on the life/working pressure of the pipes considering the total life of pipes. 6 GENERAL REQUIREMENTS OF PIPES 6.1 Appearance When viewed without magnification, the internal and external surfaces of the pipe shall be smooth, clean, and free from scoring, cavities and other surface defects which would prevent conformity with this Indian Standard. The material shall not contain visible impurities. The ends of the pipe shall be cut cleanly and square to the axis of the pipe. 6.2 Colour The colour of the pipes shall be grey, blue or cream. The cream colour is not allowed for pipes intended for aboveground application. 6.3 Opacity If a pipe is required to be opaque for use in above ground applications, the wall of the pipe shall not transmit more than 0.2 % of visible light falling on it when tested in accordance with IS 12235(Part3). 7 GEOMETRICAL CHARACTERISTICS OF PIPES 7.1 Dimension of Pipes

7.1.1 Diameter The mean outside diameter, outside diameter at any point and their tolerances shall be as given in Table 4 and shall be measured according to the method given in IS 12235 (part1). 7.1.1.1 Mean outside diameter The permissible variation (dem - dn) between the mean outside diameter (dem' ) and the nominal outside diameter (dn) of a pipe shall be positive in the form +x, where x is less than or equal to the greater of the following two values: a) 0.3 mm, and b) 0.003 dn rounded off to the next higher 0.1 mm. 7.1.1.2 Diameter at any point The permissible variation between the outside diameter at any point (de) and the nominal diameter (da) of a pipe (also called tolerance on ovality) shall not exceed the greater of the following two values: a) 0.5 mm, and b) 0.012 dn rounded off to the next higher 0.1 mm. Table 4 Outside Diameter and Tolerances (Clause 7.1.1) All dimensions in milimeter Nominal Mean Outside Diameter, dem Outside Diameter at Any Point, Outside de Diameter, dn Min. Max. Min. Max. 63 63.0 63.3 62.2 63.8 75 75.0 75.3 74.1 75.9 90 90.0 90.3 88.9 91.1 110 110.0 110.4 108.6 111.4 125 125.0 125.4 123.5 126.5 140 140.0 140.5 138.3 141.7 160 160.0 160.5 158.0 162.0 180 180.0 180.6 177.8 182.2 200 200.0 200.6 197.6 202.4 225 225.0 225.7 222.3 227.7 250 250.0 250.8 247.0 253.0 280 280.0 280.9 276.6 283.4 315 315.0 316.0 311.2 318.8 355 355.0 356.1 350.7 359.3 400 400.0 401.2 395.2 404.8 450 450.0 451.4 444.6 455.4 500 500.0 501.5 494.0 506.0 560 560.0 561.7 553.2 566.8 630 630.0 631.9 622.4 637.6

710 710.0 712.2 701.4 718.6 800 800.0 802.4 790.4 809.6 900 900.0 902.7 889.2 910.8 1000 1000.0 1003.0 988.0 1012.0 7.1.2 Wall Thickness The wall thickness of the pipes shall be as given in Table (5 to 9b) as follows: Table 5 for material class 315 for C=1.6 and 2.0 Table 6 for material class 355 for C=1.6 and 2.0 Table 7 for material class 400 for C=1.6 and 2.0 Table 8a for material class 450 for C=1.6 and 2.0 Table 8b for material class 450 for C=1.4 Table 9a for material class 500 for C =1.6 and 2. Table 9b for material class 500 for C = 1.4 Wall thickness shall be measured by any of the three methods given in IS 12235 (Part 1). To check the conformity of the wall thickness of the pipe throughout its entire length, it is necessary to measure the wall thickness of the pipe at any point along its length. This shall be done by cutting the pipe at any point along its length and measuring the wall thickness as above. Alternatively, to avoid destruction of the pipe, non- destructive testing methods such as the use of ultrasonic wall thickness measurement gauges shall be used at any four points along the length of the pipe. 7.1.2.1 Tolerance on wall thickness a) For pipes of minimum wall thickness 6 mm or less, the permissible variation between the minimum wall thickness (e min ) and the wall thickness at any point (e), (e e min ) shall be positive in the form of +y, where y =O.l e min +0.2mrn. b) For pipes of minimum wall thickness greater than 6 mm, the permissible variation of wall thickness shall again be positive in the form of +Y, where y would be applied in two parts. c) The average wall thickness shall be determined by taking at least six measurements of wall thickness round the pipe and including both the absolute minimum and absolute maximum measured values. The tolerance applied to this average wall thickness from these measurements shall be within the range 0.1 e min + 0.2 mm (see Table 5, 6, 7, 8a, 8b, 9a & 9b). d) The maximum wall thickness at any point shall be within the range O.15 e min (see Table 5, 6, 7, 8a, 8b, 9a & 9b) e) The results of these calculations for checking tolerance shall be rounded off to the next higher 0.1 mm. 7.1.3 Length The nominal pipe length, l m, shall be a minimum length which does not include the depth of the socketed portions. It is recommended that pipes be supplied in one or more of the following lengths: 6 m, 10

m, 12 m. The pipes may be supplied in other lengths where so agreed upon between the manufacturer and the purchaser. 7.2 Dimensions of Integral Socket The minimum depth of engagement of integral sockets with elastomeric sealing ring type joints shall conform to IS 4985. Attention is drawn to the fact that the depths of engagement required by IS 4985 could be insufficient for PVC-O pipes under certain circumstances. It is recommended that the suitability of depth of engagement be verified. In Annex B example is given of calculation of depth of engagement. NOTE There is no minimum wall thickness requirement for sealing ring type sockets. It is considered as being more relevant to verify the strength of the sockets as being at least the same as the strength of the pipe in accordance with 8.1.2. Although this Indian Standard covers only pipes and joints of PVC-O materials, the requirements of depth of engagement are relevant to couplers of other materials that can be employed with PVC-O pipes. Shorter depths of engagement can be suitable where restricted to 6 m and shorter lengths. 7.3 Pipe Ends Pipes with plain end(s) to be used with elastomeric sealing ring type joints shall have a chamfer conforming to Figure 1 with 12 α 15. Fig. 1 Spigot end for pipes with elastomeric se aling ring

Table 5 Wall Thickness for Material Class 315 (Clause 7.1.2) All Dimensions in millimeter (mm) Wall Thickness e n, mm Pipe series S and standard dimension ratios (SDR) 32.0 / 65 25.0 / 51 20.0 / 41 16.0 / 33 12.5 / 26 10.0 / 21 8.0 / 17 Nomin al Diame ter d n Nominal Pressure PN based on design coefficient C = 1.6 6.3 8 10 12.5 16 20 25 Nominal Pressure PN based on design coefficient C = 2.0 5 6.3 8 10 12.5 16 20 Min. Min. Min. Min. Min. Min. Min. 63 1.6 2.0 2.5 3.0 3.8 75 1.5 1.9 2.3 2.9 3.6 4.5 90 1.8 2.2 2.8 3.5 4.3 5.4 110 1.8 2.2 2.7 3.4 4.2 5.3 6.6 125 2.0 2.5 3.1 3.9 4.8 6.0 7.4 140 2.2 2.8 3.5 4.3 5.4 6.7 8.3 160 2.5 3.2 4.0 4.9 6.2 7.7 9.5 180 2.8 3.6 4.4 5.5 6.9 8.6 10.7 200 3.2 3.9 4.9 6.2 7.7 9.6 11.9 225 3.5 4.4 5.5 6.9 8.6 10.8 13.4 250 3.9 4.9 6.2 7.7 9.6 11.9 14.8 280 4.4 5.5 6.9 8.6 10.7 13.4 16.6 315 4.9 6.2 7.7 9.7 12.1 15.0 18.7

355 5.6 7.0 8.7 10.9 13.6 16.9 21.1 400 6.3 7.9 9.8 12.3 15.3 19.1 23.7 450 7.0 8.8 11.0 13.8 17.2 21.5 26.7 500 7.8 9.8 12.3 15.3 19.1 23.9 29.7 560 8.8 11.0 13.7 17.2 21.4 26.7 33.2 630 9.9 12.3 15.4 19.3 24.1 30.0 37.4 710 11.2 14.1 17.5 21.8 27.6 34.2 42.2 800 12.6 15.9 19.8 24.5 31.1 38.5 47.6 900 14.1 17.9 22.2 27.6 35.0 43.3 53.5 1 000 15.7 19.9 24.7 30.6 38.9 48.1 59.4 14

28.0 / 57 Table 6 Wall Thickness for Material Class 355 (Clause 7.1.2) All Dimensions in millimeter (mm) Wall Thickness e n, mm Pipe series S and standard dimension ratios (SDR) 22.4 / 45.8 18.0 / 37 14.0 / 29 11.2 / 23.4 9.0 / 19 Nomin Nominal Pressure PN based on design coefficient al C = 1.6 Diam eter d n 8 10 12.5 16 20 25 Nominal Pressure PN based on design coefficient C = 2.0 6.3 8 10 12.5 16 20 Min. Min. Min. Min. Min. Min. 63 1.8 2.2 2.7 3.4 75 1.7 2.1 2.6 3.2 4.0 90 1.6 2.0 2.5 3.1 3.9 4.8 110 2.0 2..4 3.1 3.8 4.7 5.9 125 2.2 2.8 3.5 4.3 5.4 6.7 140 2.5 3.1 3.9 4.8 6.0 7.5 160 2.8 3.5 4.4 5.5 6.9 8.5 180 3.2 4.0 5.0 6.2 7.7 9.6 200 3.5 4.4 5.5 6.9 8.6 10.7 225 4.0 5.0 6.2 7.7 9.6 12.0

250 4.4 5.5 6.9 8.6 10.7 13.3 280 4.9 6.2 7.7 9.6 12.0 14.9 315 5.5 6.9 8.7 10.8 13.5 16.8 355 6.2 7.8 9.8 12.2 15.2 18.9 400 7.0 8.8 11.0 13.7 17.1 21.3 450 7.9 9.9 12.4 15.4 19.2 23.9 500 8.8 11.0 13.7 17.1 21.4 26.6 560 9.8 12.3 15.4 19.2 23.9 29.8 630 11.0 13.8 17.3 21.6 26.9 33.5 710 12.4 15.4 19.2 24.4 30.2 37.3 800 14.0 17.4 21.6 27.4 34.0 42.0 900 15.7 19.6 24.3 30.9 38.2 47.3 1 000 17.5 21.7 27.0 34.3 42.5 52.5 15

Table 7 Wall Thickness for Material Class 400 (Clause 7.1.2) All Dimensions in millimeter (mm) Wall Thickness e n, mm Pipe series S and standard dimension ratios (SDR) 32.0 / 65 25.0 / 51 20.0 / 41 16.0 / 33 12.5 / 26 10.0 / 21 8.0 / 17 Nomin al Diame ter dn Nominal Pressure PN based on design coefficient C = 1.6 8 10 12.5 16 20 25 Nominal Pressure PN based on design coefficient C = 2.0 6.3 8 10 12.5 16 20 25 Min. Min. Min. Min. Min. Min. Min. 63 1.6 2.0 2.5 3.0 3.8 75 1.5 1.9 2.3 2.9 3.6 4.5 90 1.8 2.2 2.8 3.5 4.3 5.4 110 1.8 2.2 2.7 3.4 4.2 5.3 6.6 125 2.0 2.5 3.1 3.9 4.8 6.0 7.4 140 2.2 2.8 3.5 4.3 5.4 6.7 8.3 160 2.5 3.2 4.0 4.9 6.2 7.7 9.5 180 2.8 3.6 4.4 5.5 6.9 8.6 10.7 200 3.2 3.9 4.9 6.2 7.7 9.6 11.9 225 3.5 4.4 5.5 6.9 8.6 10.8 13.4 250 3.9 4.9 6.2 7.7 9.6 11.9 14.8

280 4.4 5.5 6.9 8.6 10.7 13.4 16.6 315 4.9 6.2 7.7 9.7 12.1 15.0 18.7 355 5.6 7.0 8.7 10.9 13.6 16.9 21.1 400 6.3 7.9 9.8 12.3 15.3 19.1 23.7 450 7.0 8.8 11.0 13.8 17.2 21.5 26.7 500 7.8 9.8 12.3 15.3 19.1 23.9 29.7 560 8.8 11.0 13.7 17.2 21.4 26.7 33.2 630 9.9 12.3 15.4 19.3 24.1 30.0 37.4 710 11.2 14.1 17.5 21.8 27.6 34.2 42.2 800 12.6 15.9 19.8 24.5 31.1 38.5 47.6 900 14.1 17.9 22.2 27.6 35.0 43.3 53.5 1 000 15.7 19.9 24.7 30.6 38.9 48.1 59.4 16

Table 8a Wall Thickness for Material Class 450 (Clause 7.1.2) All Dimensions in millimeter (mm) Wall Thickness e n, mm Pipe series S and standard dimension ratios (SDR) 22.4 / 45.8 18.0 / 37 14.0 / 29 28.0 / 57 Nomin al Nominal Pressure PN based on design coefficient C = 1.6 Diame ter d n 10 12.5 16 20 Nominal Pressure PN based on design coefficient C = 2.0 11.2 / 23.4 9.0 / 19 25 8 10 12.5 16 20 25 Min. Min. Min. Min. Min. Min. 63 1.8 2.2 2.7 3.4 75 1.7 2.1 2.6 3.2 4.0 90 1.6 2.0 2.5 3.1 3.9 4.8 110 2.0 2..4 3.1 3.8 4.7 5.9 125 2.2 2.8 3.5 4.3 5.4 6.7 140 2.5 3.1 3.9 4.8 6.0 7.5 160 2.8 3.5 4.4 5.5 6.9 8.5 180 3.2 4.0 5.0 6.2 7.7 9.6 200 3.5 4.4 5.5 6.9 8.6 10.7 225 4.0 5.0 6.2 7.7 9.6 12.0 250 4.4 5.5 6.9 8.6 10.7 13.3 280 4.9 6.2 7.7 9.6 12.0 14.9 315 5.5 6.9 8.7 10.8 13.5 16.8 355 6.2 7.8 9.8 12.2 15.2 18.9 400 7.0 8.8 11.0 13.7 17.1 21.3

450 7.9 9.9 12.4 15.4 19.2 23.9 500 8.8 11.0 13.7 17.1 21.4 26.6 560 9.8 12.3 15.4 19.2 23.9 29.8 630 11.0 13.8 17.3 21.6 26.9 33.5 710 12.4 15.4 19.2 24.4 30.2 37.3 800 14.0 17.4 21.6 27.4 34.0 42.0 900 15.7 19.6 24.3 30.9 38.2 47.3 1 000 17.5 21.7 27.0 34.3 42.5 52.5

Table 8b Wall Thickness for Material Class 450 (Clause 7.1.2) All Dimensions in millimeter (mm) Wall Thickness e n, mm Pipe series S and standard dimension ratios (SDR) Nomin al Diamete rd n 32.0 / 65 25.0 / 51 20.0 / 41 16.0 / 33 12.5 / 26 Nominal Pressure PN based on design coefficient C = 1.4 10 12.5 16 20 25 Min. Min. Min. Min. Min. 63 1.6 2.0 2.5 75 1.5 1.9 2.3 2.9 90 1.8 2.2 2.8 3.5 110 1.8 2.2 2.7 3.4 4.2 125 2.0 2.5 3.1 3.9 4.8 140 2.2 2.8 3.5 4.3 5.4 160 2.5 3.2 4.0 4.9 6.2 180 2.8 3.6 4.4 5.5 6.9 200 3.2 3.9 4.9 6.2 7.7 225 3.5 4.4 5.5 6.9 8.6 250 3.9 4.9 6.2 7.7 9.6 280 4.4 5.5 6.9 8.6 10.7 315 4.9 6.2 7.7 9.7 12.1 355 5.6 7.0 8.7 10.9 13.6 400 6.3 7.9 9.8 12.3 15.3 450 7.0 8.8 11.0 13.8 17.2 500 7.8 9.8 12.3 15.3 19.1 560 8.8 11.0 13.7 17.2 21.4

630 9.9 12.3 15.4 19.3 24.1 710 11.2 14.1 17.5 21.8 27.6 800 12.6 15.9 19.8 24.5 31.1 900 14.1 17.9 22.2 27.6 35.0 1 000 15.7 19.9 24.7 30.6 38.9 18

Table 9a Wall Thickness for Material Class 500 (Clause 7.1.2) All Dimensions in millimeter (mm) Wall Thickness e n, mm Pipe series S and standard dimension ratios (SDR) 32.0 / 65 25.0 / 51 20.0 / 41 16.0 / 33 12.5 / 26 10.0 / 21 Nomin al Diame ter d n Nominal Pressure PN based on design coefficient C = 1.6 10 12.5 16 20 Nominal Pressure PN based on design coefficient C = 2.0 25 8 10 12.5 16 20 25 Min. Min. Min. Min. Min. Min. 63 1.6 2.0 2.5 3.0 75 1.5 1.9 2.3 2.9 3.6 90 1.8 2.2 2.8 3.5 4.3 110 1.8 2.2 2.7 3.4 4.2 5.3 125 2.0 2.5 3.1 3.9 4.8 6.0 140 2.2 2.8 3.5 4.3 5.4 6.7 160 2.5 3.2 4.0 4.9 6.2 7.7 180 2.8 3.6 4.4 5.5 6.9 8.6 200 3.2 3.9 4.9 6.2 7.7 9.6 225 3.5 4.4 5.5 6.9 8.6 10.8 250 3.9 4.9 6.2 7.7 9.6 11.9 280 4.4 5.5 6.9 8.6 10.7 13.4 315 4.9 6.2 7.7 9.7 12.1 15.0

355 5.6 7.0 8.7 10.9 13.6 16.9 400 6.3 7.9 9.8 12.3 15.3 19.1 450 7.0 8.8 11.0 13.8 17.2 21.5 500 7.8 9.8 12.3 15.3 19.1 23.9 560 8.8 11.0 13.7 17.2 21.4 26.7 630 9.9 12.3 15.4 19.3 24.1 30.0 710 11.2 14.1 17.5 21.8 27.6 34.2 800 12.6 15.9 19.8 24.5 31.1 38.5 900 14.1 17.9 22.2 27.6 35.0 43.3 1 000 15.7 19.9 24.7 30.6 38.9 48.1 19

Table 9b Wall Thickness for Material Class 500 (Clause 7.1.2) All Dimensions in millimeter (mm) Wall Thickness e n, mm Pipe series S and standard dimension ratios (SDR) Nominal 28.0 / 57 22.4 / 45.8 18.0 / 37 14.0 / 29 Diameter dn Nominal Pressure PN based on design coefficient C = 1.4 12.5 16 20 25 Min. Min. Min. Min. 63 1.8 2.2 75 1.7 2.1 2.6 90 1.6 2.0 2.5 3.1 110 2.0 2..4 3.1 3.8 125 2.2 2.8 3.5 4.3 140 2.5 3.1 3.9 4.8 160 2.8 3.5 4.4 5.5 180 3.2 4.0 5.0 6.2 200 3.5 4.4 5.5 6.9 225 4.0 5.0 6.2 7.7 250 4.4 5.5 6.9 8.6 280 4.9 6.2 7.7 9.6 315 5.5 6.9 8.7 10.8 355 6.2 7.8 9.8 12.2 400 7.0 8.8 11.0 13.7 450 7.9 9.9 12.4 15.4 500 8.8 11.0 13.7 17.1 560 9.8 12.3 15.4 19.2

630 11.0 13.8 17.3 21.6 710 12.4 15.4 19.2 24.4 800 14.0 17.4 21.6 27.4 900 15.7 19.6 24.3 30.9 1 000 17.5 21.7 27.0 34.3 8 MECHANICAL CHARACTERISTICS OF PIPES 8.1 Resistance to Hydrostatic Pressure 8.1.1 Pipes When subjected to internal hydrostatic pressure test in accordance with the procedure given in IS 12235 (Part 8/See 1), the pipe shall not fail during the prescribed test duration. The temperatures, duration and hydrostatic (hoop) stress for the test shall conform to the requirements given in Table 10. The test shall be carried out not earlier than 24 h after the pipes have been manufactured. Table 10 Test Parameters for the Determination of the Resistance to Internal Pressure Test Tempera Duration Circumferential Stress/Hoop Stress, σ ture (Hours) (MPa) ( 0 C) PVC-O PVC-O PVC-O PVC-O PVC-O 315 355 400 450 500 Acceptance 27 10 44* 46* 52* 60* 65* Type 60 1000 20 22 25 29 32 Test water- in- water * Stress values calculated at 27ºC in order to calculate the testing pressure. It is required to apply the derating factor according Annex D. NOTE The minimum circumferential stress in the material of the pipe wall shall be calculated on the basis of the results of the pre-certification tests which included the determination of the regression lines and the MRS value. The test pressure shall be calculated by using the following formula: σ = p T (d n e n )/ 20e n p T = f T p Therefore, p = 20σe n /(d n e n )f T Where,

σ is hoop stress in MPa d n is nominal diameter in mm e n is minimum wall thickness in mm p is test pressure in bar p T is test pressure having into account the derating factor f T is derating factor depending on Temperature for Acceptance tests. Defined in Annex D. For 27ºC, f T is 0.95. For Type test f T is 1, because the Stress value from Table 10 is calculated having into account 60ºC. Example 1: for pipe of DN 200 mm, PN 16 (Wall Thickness- 4.4mm) of 500 class of material. Acceptance test at 27 0 C for 10 hrs P = 27.78 bar Type test at 60 0 C for 1000 hrs P = 14.4 bar Example 2: for pipe of DN 200 mm, PN 16 (Wall Thickness- 4.9mm) of 450 class of material. Acceptance test at 27 0 C for 10 hrs P = 28.63 bar Type test at 60 0 C for 1000 hrs P = 14.57 bar 8.1.2 Pipes with Integral Socket When tested in accordance with IS 12235 (Part 8), using the test procedure as given in 8.1.1, integral sealing ring sockets formed on pipes shall not fail in less than the time according to 8.1.1. The length of the pipe section shall meet the requirements or specification given in 8.1.1. Failure shall not occur in either pipe or socket sections. Data obtained is valid for pipe specified in 8.1.1. The requirements for integral sealing ring sockets are given in Table 7. 8.2 Resistance to External Blow at 0 0 C Pipes shall be tested at 0 C in accordance with IS 12235(Part9), and shall have a true impact rate (TIR) of not more than 10 % when using masses given in Table 11. The radius of the striker nose shall be R = 12.5 mm. The drop height is 2 meter. Table 11 Classified Striker Mass and Drop Height Conditions for the Falling-Weight Impact Test Nominal size DN Total mass kg 63 4

75 5 90 5 110 6,3 125 6,3 140 8 160 8 180 10 200 10 225 12,5 NOTE Masses are based on experience of pipe material classes 450 and 500. Masses for other pipe material classes are still under study. NOTE Impact characteristics can change over time. These values are applicable only at the time of manufacture. 8.3 Ring Stiffness The ring stiffness of pipes conforming to this Indian Standard can be determined in accordance with IS 12235 (Part 18). Pipes of stiffness less than 4 KN/m 2 might not be suitable where high vacuum or external pressure could be developed, and could need special installation techniques where installed below ground. National regulations and/or national practices on use of specific fittings can require minimum stiffness of pipes. NOTE Minimum stiffness of pipes could be required for installation with some type of fittings. The calculated nominal stiffness of the pipes is given in Annex C. 8.4 Orientation Level Variations in stretch ratios should be within 10 % of the value determined on the pipes used for classification. The determination of the stretch ratios may be carried out as per Annex F. NOTE When determining the orientation degrees in the tangential and axial direction of the pipe, use is made of the fact that the biaxial oriented pipe in the rubber phase (above the glass/rubber transition temperature) will shrink till the initial dimensions determined by the extrusion process. 9 PHYSICAL CHARACTERISTICS

When tested in accordance with the test methods as specified in Table 13 using the indicated parameters, the pipe shall have physical characteristics conforming to the requirements given in Table 13. Table 13 Physical characteristics (Clause 9) Characteristic Requirement Test parameters Test method Vicat softening temperature)a 80 C Shall conform to IS 12235(Part2) IS 12235(Part2) and IS 12235(Part2). Number of test pieces:3 Resistance to dichloromethane at a of bath: (15 No attack at any part Temperature of specific temperature (degree of the surface of the test ± 1) C gelation)a piece Immersion time: 15 min. Min. wall thickness: 1.5 mm IS 12235(Part11) Alternative test method to resistance to dichloromethane Uniaxial tensile test Minimum stress 48 MPa In accordance with IS 12235(Part 13) IS 12235(Part13) Alternative test method to resistance to dichloromethane Differential Scanning Calorim- etry B onset tempera- Shall conform to IS 13360 (Part-6) (DSC) ture 185 C Sec 10. Number of test pieces:4 IS 13360 (Part-6) Sec 10 a To be carried out on feedstock pipe (preform) or on reverted pipe. 10 MECHANICAL CHARACTERISTICS OF ASSEMBLIES, INCLUDING JOINTS 10.1 Assemblies With Non-End-Load-Bearing Joints The following types of assemblies with non-end-load-bearing joints shall fulfil the fitness

for purpose requirements given in 10.2 to 10.5 and Tables 14, 15, and 16, as applicable: a) integrally socketed PVC-O pipe to pipe assemblies with elastomeric ring seal joints conforming to this Indian Standard; b) metal fitting and PVC-O pipe assemblies with elastomeric ring seal joints; c) metal valve and PVC-O pipe assemblies with elastomeric ring seal joints; d) mechanical joint assemblies with PVC-O pipes. 10.2 Short-Term Pressure Test for Leak Tightness of Assemblies 10.2.1 Test Procedure When an assembly with one or more elastomeric sealing ring type joints is tested using a hydrostatic pressure and angular deflection in accordance with IS 12235(Part8) Sec 2, and the test conditions given in Table 14, the assembly shall conform to the requirement given in Table 14. Table 14 Test Conditions and Requirement for Short-Term Assembly Test Test temperature Test pressure Test time Test requirement bar C T ± 5 Pressure calculated in One cycle in accordance No leakage at any point accordance with Figure with Figure 2 of the jointing areas where T is any and 10.2.2 through-out the whole temperature test cycle. between 20 C and 27 C NOTE The pressure changes from one pressure level to the next shall take place within the periods indicated, but need not take place at strictly linear rates. Key X time, min Y factor f Fig. 2 Hydrostatic pressure test regime

10.2.2 Test Pressure The test pressures ptshall be calculated by multiplying the factor ƒ indicated in Figure 2 by the nominal pressure PN, i.e. by using the following equation: pt=ƒ PN x ƒt where PN is the nominal pressure f pt is the multiplying factor is the test pressure ƒt is derating factor (0,95at 27º C) 10.3 Short-Term Negative Pressure Test for Leak Tightness of Assemblies When an assembly with one or more elastomeric sealing ring type joints is tested using a negative pressure with angular deflection and the deformation in accordance with IS 12235(Part 8/Sec 3) : 2004 and the test conditions given in Table 15, the assembly shall conform to the requirement given in Table 15. Table 15 Test Conditions and Requirement for Short-Term Negative-Pressure Assembly Test Test temperature Test pressure Test time Test requirement bar C T ± 5 Pressure calculated in One cycle in accordance The change in negative accordance with Figure with Figure 3. pressure shall be not where T 27 C. 3. more than 0.005 MPa during each 15 min test period shown in Figure 3. The pressure changes from one pressure level to the next need not take place at strictly Note 1 linear rates. For pipes with integral sockets there is no need for testing with Note 2 angular deflection. For pipes SN less than 4 kn/m 2 it is allowed to support the pipe to avoid collapsing during Note 3 testing.

Key X time, min Y pressure, bar Pt=Y x ƒt (ƒt = derating factor (0,95at 27 o C)) Fig. 3 Negative-pressure test regime 10.4 Long-Term Pressure Test for Leak Tightness When an assembly with one or more joints selected from elastomeric sealing ring type sockets and other end-load-bearing and non-end-load-bearing joints for oriented PVC-U components for a piping system is tested in accordance with IS 12235(Part8/Sec 4), using the test conditions given in Table 16 for the test temperatures of 27 C and 40 C, the assembly shall conform to the requirement given in Table 16. Table 16 Test Requirement for the Long-Term Pressure Testing of Assembled Joints Test temperature Test pressurea Test time Test requirement Bar (h) C 27 1.4 PN 1 000 No leakage at any point of the jointing areas for 40 1.1 PN 1 000 at least the test time. a The PN rating used in this calculation is the PN rating of the fitting or, if pipe with an integral joint is being tested, the PN rating of the pipe. See Annex F for an explanation of the values. 27

10.5 End-Load-Bearing Joints Pressure and Bending Test for Leak Tightness and Strength When end-load-bearing joints having one or more sockets (see note) and fitted with one or more elastomeric sealing rings together with one or more locking rings to withstand the longitudinal forces resulting from the application of internal hydraulic pressure are tested in accordance with IS 7634 (Part -3) at a single ambient temperature of (T ± 5) C (where T is any temperature between 20 C and 35 C), the joint shall remain le ak tight throughout the whole of the test period. NOTE Such joints are usually, but not necessarily, in the form of double sockets. 11 ELASTOMERIC SEALS Elastomeric seals used for joining components shall conform to both of the following requirements. a) The rings shall conform to the material requirements specified in IS 5382. b) The rings shall be free from chemical agents (e.g. plasticizers) that could have a detrimental effect on the pipes or fittings, or on the quality of the water. 12 SAMPLING AND CRITERIA FOR CONFORMITY The sampling procedure and the criteria for conformity shall be as given in Annex. F. 13 MARKING Pipes shall be permanently marked at intervals not greater than 1 m. The markings shall include at least the following information: a) the manufacturer s name and/or trade mark; b) the pipe material and material classification number, e.g. PVC-O 450; c) the nominal outside diameter d n and nominal wall thickness e n, e.g. 160 3.1; d) reference to this Indian Standard, e) the nominal pressure PN; f) the C-factor, i.e. C = 1.4, C = 1.6 or C = 2.0; g) production site; h) production date or code. 28

14 GUIDELINES FOR STORAGE AND INSTALATION 14.1 Storage The following guidelines are suggested: Store the pipes horizontally on a flat surface and place supports every 1.5 meters to avoid the bending of the product. Avoid scratches especially in the crest of the socket, due to dragging the pipe on the ground, mainly if the surface is made of stone, concrete or asphalt. Do not stack more than 1.5 meters high, as this can damage lower pipes or even the upper pipes could fall. The sockets should be free, alternating sockets and ends. In case of prolonged sun exposure, protect pallets with an opaque material. White colour is preferable because it avoids the over-heating of the pipes. 14.2 Realization of the Trench The trench must be free of stones at the bottom and at the sides. Stones smaller than 10-20 mm are allowed, but they cannot be the main size of the ground particles. Minimum Trench Width: DN Minimum width of trench mm m 90-250 0.60 315 0.85 355 1.00 400 1.10 450 1.15 500 1.20 630 1.35 800 1.65 Depth of Minimum width of trench trench m m h<1.00 0.60 1.00<h<1.7 5 0.80 1.75<h<4.0 0 0.90 h>4.00 1.00 As a rule of thumb, when there is no road traffic involved, the pipes crown will be at a minimum depth of 0.6 meters; with road traffic, the minimum depth is 1 meter. 29

14.3 Bedding and Filling the Trench Pipes should be installed following the guidelines below: 1. Before placing the pipe, a sand bed should be prepared (a fine granular material could be used instead of sand) with a thickness from 10 cm to 15 cm. The pipe should be well aligned and levelled. 2. The pipe must lie on the sand bed.it must be ensured that all the lower part of the pipe is settled on the sand bed trying to soak as much as possible in order to make the angle of sand that supports the kidneys of the pipe as big as possible. 3. Once the pipe is placed, chamberlain sides must be filled with the selected material and compacted to achieve >95% Proctor Normal. 4. The trench must be filled with the selected material and compacted laterally until the upper part of the pipe is buried at least 30 cm. 5. Steps 3 and 4 can be done with the same natural material obtained from the excavation, trying to avoid rocks and large stones, and checking that this natural material can support the forces produced by the pressure inside of the pipe. Natural soil can be used as the selected filler material whenever it fulfills the following criteria: a) The material cannot consist of angular stones or similar material. b) Filler material should not contain bigger particles than the ones shown in the following table. c) Filler material should not contain blocks of soil twice the size of the maximum dimensions of the particles given in the table. Maximum Particle Size Nominal diameter Maximumsize DN mm DN <100 15 100 DN <300 20 300 DN <600 30 600 DN 40

6. From the 30 cm above the pipe until the surface of the ground, the trench can be filled with natural material not specifically selected and compacting directly over the whole surface of the trench. 31

14.4 Assembly Remove the protection caps. Verify that the pipe is clean and in good condition. Paying attention to the sockets and spigot ends. Check that the chamfer is correct and free of cracks. Verify that the seal is in its place, clean and free of foreign materials (stones, sand, etc.). Lubricate the chamfer of the spigot and the seal with joint lubricant. Line up the pipe as much as possible horizontal and vertically. Insert only the chamfer edge of the socket, just to support the pipe but leaving the socket lip free. In the case of pipes with nominal diameter 250 mm, a firm and dry push should be given to seize the momentum produced by the free movement in the lip of the socket and introduce it until the mark is hidden into the socket. When installing diameters >250mm, one should use mechanical means to introduce the pipe using materials such as wood, hoists, tackles or slings. 32

ANNEX A (Clause 2) LIST OF REFERRED INDIAN STANDARDS 4669 : 1968 Methods of tests for Polyvinyl Chloride resins. 4985 : 2000 Unplasticized PVC pipes for potable water supplies specification 7634 (Part 3) : 2003 Plastics pipes selection, handling, storage and installation for potable water supplies Code of Practice. Part 3 Laying an d jointing of UPVC pipes. 7834 (Part 1) : 1987 Specification for Injection moulded PVC Socket Fittings with solvent cement joints for water supplies-part 1- General Requirements. 10151 : 1982 Specification for polyvinyl chloride (PVC) and its copolymers for its safe use in contact with foodstuffs, pharmaceuticals and drinking water. 12235(Part 1) : 2004 Thermoplastics pipes and fittings Methods of test: Part: 1 Measurement of Dimensions. 12235(Part 2) : 2004 Thermoplastics pipes and fittings Methods of test: Part: 2 Determination of Vicat softening temperature. 12235(Part 3) : 2004 Thermoplastics pipes and fittings Methods of test: Part: 3 Test for opacity. IS 12235(Part 5/Sec 1):2004 Thermoplastics pipes and fittings Methods of test: Part: 5 Longitudinal reversion. Sec 1 Determination methods. 12235(Part 5/Sec 2) : 2004 Thermoplastics pipes and fittings Methods of test: Part: 5 Longitudinal reversion. Sec 2 Determination parameters. 12235(Part 8/Sec 1) : 2004 Thermoplastics pipes and fittings Methods of test: Part 8 Resistance to internal hydrostatic pressure Section 1 Resistance to internal hydrostatic pressure at constant internal water pressure. 12235(Part 8/Sec 2) : 2004 Thermoplastics pipes and fittings Methods of test: Part 8 Resistance to internal hydrostatic pressure Section 2 Leaktightness of elastomeric sealing ring type socket joints under positive internal pressure and with angular deflection. 12235(Part 8/Sec 3) : 2004 Thermoplastics pipes and fittings Methods of test: Part 8 Resistance to internal hydrostatic pressure Section 3 Leaktightness of elastomeric sealing ring type socket joints under negative internal pressure and with angular deflection.

12235(Part 9) : 2004 Thermoplastics pipes and fittings Methods of test: Part: 9 Resistance to external blows (impact resistance) at O C (round -the-clock method). I12235(Part 11) : 2004 Thermoplastics pipes and fittings Methods of test: Part: 11 Resistance to dichloromethane at specified temperature 12235(Part 13) : 2004 Thermoplastics pipes and fittings Methods of test: Part: 13 Determination of tensile strength and elongation 12235(Part 18) : 2004 Thermoplastics pipes and fittings Methods of test: Part 18 Determination of ring stiffness. 13360 (part 6/sec 10) : 2013 Plastics Methods of testing. Part 6 thermal properties. Section 10: Determination of melting behaviour (melting temperature or melting range) of semi-crystalline polymers by capillary tube and polarizing microscope methods 13592 : 2013 Unplastisized Polyvinyl Chloride (PVC-U) pipes for soil and waste Discharge system for Inside and Outside Buildings including Ventilation and Rain Water System specification. 14151 Irrigation equipment Sprinkler pipes Specification Part 1 Polyethylene Pipes. 14735 : 1999 Unplasticized Polyvinyl Chloride (UPVC) Injection Moulded Fittings for Soil and Waste Discharge System for Inside and Outside Buildings Including Ventilation and Rain Water System Specification 15328 Unplasticized Non-pressure Polyvinylchloride (UPVC) pipes for use in underground drainage and sewerage system- Specification. 15778 : 2007 Chlorinated Polyvinylchloride (CPVC) pipes for potable hot and cold water distribution supplies specification IS 16130:2014 Thermoplastics materials for pipes and fittings for pressure applications Classification and designation - Overall service (design) co-efficient.