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Is 15328 Pvc Pipes in Sewerage
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UNPLASTICIZED NON-PRESSURE POLYVINYL CHLORIDE ( PVC-U) PIPES FOR USE IN UNDERGROUND DRAINAGE AND SEWERAGE SYSTEMS SPECIFICATION
lCS 83. 140.30;93.030
0 BIS 2003 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 Jldy 2003 Price Group 10
Plastic Piping System Sectional Commitlee, CED 50
FOREWORD This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Plastic Piping System Sectional Committee had been approved by the Civil Engineering Division Council. This standard has been prepared with a view to providing guidance for the manufacture and selection of PVC-U pipes for the conveyance of domestic sewage, industrial waste and surface water ( other than potable water ). PVC-U pipes for conveyance of potable water are covered in IS 4985:2000 water supplies Specification ( third revision ). U.nplasticized PVC pipes for potable
In the formulation of this standard, due weightage has been given to bring it in line with International Standards as well as market situations and practices prevailing in India and considerable assistance has been derived from the following International Standards published by International Organization for Standardization: 1S0 580:1990 1S0 1167:1996 1S03127 :1994 1S0 4065:1996 1s04435 :1991 1S03604-1976 Injection moulded unplasticized ( polyvinyl chloride ) ( PVC-U ) fittings Oven test Test method and basic specifications Thermoplastics pipes for the transport of fluids Resistance to internal pressure Test method Thermoplastic pipes Determination of resistance to external blows Thermoplastics pipes Universal wall thickness table Unplasticized ( polyvinyl chloride) ( PVC-U ) pipes and fittings for buried drainage and sewerage systems Specification Fitting for unplasticized polyvinyl chloride ( PVC-U) pressure pipes with elastic sealing ring type joints Pressure test for Ieakproofhess under conditions of external hydraulic pressure Plastics piping systems Elastomeric-sealing-ring-type socket joints for use with unplasticized ( polyvinyl chloride) ( PVC-U ) pipes Test method for leaktightness under internal pressure and with angular deflection Plastics piping systems End-load-bearing and non-end-load-bearing assemblies for thermoplastics pressure piping Test method for long-term leaktightness under internal water pressure
Iso/DIs 3845-1995
ISOiDIS 13846-1995
The composition of the Committee responsible for formulation of this standard is given in Annex G. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance The number of significant places retained with 1S 2: 1960 Rules for rounding off numerical values ( revised). in the rounded off value should be the same as that of the specified value in this standard.
IS 15328:2003
1 SCOPE This standard specifies the requirements of plain ended or equipped with integral sockets for either solvent-cement welding or for jointing with elastomeric sealing rings pipes made of unplasticized polyvinyl chloride ( PVC-U ) of nominal outside diameters ranging from 110 mm up to and including 630 mm, intended for underground (buried) nonpressure gravity drain and sewer applications for transportation of soil and waste discharge of domestic origin, surface water ( storm water ) and industrial effluent. In the case of industrial effluent, chemical and temperature resistance and resistance to suspended matter have to be taken into account. 2 REFERENCES The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below:
14182:1994
Solvent cement for use with unplasticized polyvinyl chloride pipe and fittings Specification
3 TERMINOLOGY 3.0 For the purpose of this standard, the following definitions shall apply. 3.1 Nominal Size ( DN) The numerical designation for the size of a pipe, other than a pipe designated by thread size, which is a convenient round number approximately equal to the manufacturing dimension in millimetres. 3.2 Nominal Outside Diameter (da) The specified outside diameter in millimetres assigned to the nominal size. 3.3 Outside Diameter at Any Point ( d,) The value of the measurement of the outside diameter of a pipe through its cross-section at any point of Ihe pipe, rounded off to the next higher 0.1 mm. 3.4 Mean Outside Diameter ( dem) The quotient of the outer circumference of a pipe and 3.142 ( n ) in any cross-section, rounded off to the next higher 0,1 mm. 3.5 Minimum Mean Outside Diameter ( dem,~in ) The minimum value of the mean outside diameter as specified for a given nominal size.
~ax) 3.6 Maximum Mean Outside Diameter ( dem, The maximum value of the mean outside diameter as specified for a given nominal size.
4905:1968 4985:2000
Methods for random sampling Unplasticized PVC pipes for potable water supplies Specification ( third revision ) Specification for rubber sealing rings for gas mains, water mains and sewers (first revision ) Methods of test for unplasticized PVC pipes for potable water supplies:
3.7 Inside Diameter of a Socket (d, ) The value of the measurement of the inside diameter of the socket at any point in any cross-section of the socket. 3.8 Mean Inside Diameter of a Socket (d,m) The arithmetical mean of four measurements, taken at 45 to each other, of the inside diameter of the socket in the same cross-section of the socket. 3.9 Out-of Roundness ( Ovality ) The difference between the measured maximum and the measured minimum outside diameter in the same cross-section of the pipe. 1
(Part 1): 1986 Method of measurement of outside diameter (Part 5):1986 (Part 8):1986 Reversion test Internal hydrostatic pressure test
IS 15328:2003 3.10 Nominal Wall Thickness (en ) A numerical designation of the wall thickness of a component which is a convenient round number, approximately equal to the manufacturing dimension in millimetres. 3.11 Wall Thickness at Any Point(e) The value of the measurement of wall thickness at any point around the circumference of a pipe, rounded off to the next higher 0.1 mm. 3.12 Minimum Wall Thickness at Any Point ( e~in) The minimum value for the wall thickness at any point around the circumference of a pipe, rounded off to the next higher 0.1 mm. 3.13 Maximum Wall Thickness at Any Point ( e~,X) The maximum value for the wall thickness at any point round the circumference of a pipe, rounded off to the next higher 0.1 mm. 3.14 Mean Wall Thickness ( em ) The arithmetical mean of at least four measurements regularly spaced around the circumference and in the same cross-section of a pipe, including the measured minimum and the measured maximum values of the wall thickness in that cross-section, rounded off to the next higher 0.1 mm. 3.15 Maximum Mean Wall Thickness ( em,~,X) The maximum value for the mean wall thickness around the circumference of a component, as specified. 3.16 Tolerance The permitted variation of the specified value of a quantity, expressed as the difference between the permitted maximum and the permitted minimum value. 3.17 Standard Dimension Ratio ( SDR ) A numeri cal designation of a pipe series, which is a convenient round number approximately equal to the ratio of the minimum mean outside diameter, d~,n,,ninand the minimum wall thickness at any point, e~in
SDR d em,min = ~
use or processing other than that required for its manufacture and to which no reprocessable or recyclable materials have been added. 3.21 Own Rework Material Material prepared from rejected, unused pipes, including trimmings from the production of pipes that will be reprocessed in a manufacturers plant by.a process such as extrusion and for which the complete formulation is known. 3.22 Tests 3.22.1 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 pipes. 3.22.2 Acceptance Tests Tests carried out on samples taken from a lot for the purpose of acceptance of the lot. 4 SYMBOLS The following notations ( symbols) shall apply in this standard:
dn de dem : Nominal outside diameter : Outside diameter at any point
d em,nmx : Maximum mean outside diameter dem,min : Minimum mean outside diameter d, d: ;; e em: emm e,m]n em,m A: B:
: Inside diameter of socket
Mean inside diameter of socket
: Dimension ratio
Wall thickness at any point Mean wall thickness
: Maximum wall thickness at any point : Minimum wall thickness at any point : Maximum mean wall thickness
Minimum depth of engagement Length of lip Depth of sealing zone Wall thickness of the socket : Wall thickness of the groove Effective length of pipe
: Length of spigot : Length of solvent cement socket
3.18 Nominal Ring Stiffness( SN) A numerical designation, which is a convenient round number, of the ring stiffness of a pipe or fitting, relative to the determined stiffness in kilonewtons per square metre ( kN.m2 ), indicating the minimum required ring stiftiess ofa pipe or fitting. 3.19 Socket-Ended Pipe UnplasticiZed PVC pipes whose one end is expanded after heating for the purpose ofjointing by solvent cement or jointing using an elastomeric sealing ring, to the plain ends of the pipes. 3.20 Virgin Material Material in such form as granules or powder that has not been subjected to 2
e2 e3 1;
1, 12 H:
NOTE The meanings of the symbolsA, 1?,C and H are i1 Iustratedin the respective figures.
5 COMPOSITION OF THE MATERIAL 5.1 The material ffom which the pipe is produced shall consist substantially of polyvinyl chloride, to which
IS 15328:2003 may be added only those additives that are needed to facilitate the manufacture of the compound and the manufacture of sound and durable pipe of good surface finish, mechanical strength and opacity under conditions of use. None of these additives shall be used separately or together in quantities sufficient materially to impair the fabrication or welding properties of the pipe, or to impair its chemical and physical or mechanical properties ( in particular long-term mechanical strength and impact strength ) as defined in this standard. 5.2 The material shall contain a minimum of 0.3 percent ofrutile grade titanium dioxide. 5.3 When sealing rings are retained by means of retaining devices ( rings or caps ), the devices may be made from polymers other than PVC-U, provided they conform to the same functional dimensions and test requirements as applied to sockets with either loose or fixed sealing rings. 5,4 The manufacturers own rework material conforming to the requirements given in 3.21 is permissible. No other rework material shall be used. 6 DIMENSIONS
NOTE The sketches in this standard are schematic. They are meant to demonstrate relevant dimensions. They do not necessarily represent manufactured components.
6.1.2 Wall Thickness The nominal wall thickness, e, shall be in accordance with Table 2. Tolerances in outside diameters shall be those given in IS 4985 6.1.3 Length of Pipe
6.1,3.1 Effective length (L, ) of pipes with sockets is
considered to be the distance between ends minus the socket depth as shown in Fig. 1. The lengths may be supplied as agreed to between the purchaser and the manufacturer. 6.1.4 Dimensions
Ends of Integral Sockets and Spigots
The basic dimensions shall be in accordance with Tables 3 and 4, and Fig. 2,3,4 and 5. 6.1.4.1 WaII Thickness of Sockets
e2min 0.9e and e~~in= 0.75e
ej ~imapplies only to those parts of the sealing ring zone where the fluid contained within the pipe comes into contact with the fluid, that is beyond the designated ring seal point, walls thinner than e3 are permitted. If retaining caps or rings areprovided, they can be made to other designs or from polymers other than unplasticized polyvinyl chloride, provided that the finished joint conforms to the same functional test requirements. When a sealing ring is retained by means of a retaining ring or cap, the wall thickness Of the area shall be calculated by addition of the wall thickness at the corresponding places of the socket and the retaining ring or cap ( see Fig. 3 ). In all cases, the components shall meet the functional test requirements.
6.1 Dimension of Pipes 6.1. 1 Mean Outside Diameter The mean outside diameter, outside diameter at any point and tolerances shall be as given in Table 1 and shall be measured according to the method given in IS 12235 (Part 1 ).
Table 1 Outside Diameters and Tolerances ( Clause 6.1.1)
All dimensions in millimetres. S1 No. Nominal Outside Diameter, dn (2) Mean Outside Diameter, dem Min (3) ? Max (4) 110.4 Outside Diameter at Any Point, de Min (5) 108.6 123.5 158.0 197.6 247.0 311.2 395.2 494.0 622.4
125.0 160.0
111.4 126.5 162.0 202.4 253.0 318.8 404.8 506.0 637.6
200.0 250.0 315.0 400.0 500.0 630.0 3
125.4 160.5 200.6 250.8 316.0 401.2 501.5 631.9
SOCKET SINGLE :~p>KET SLIDING SOCKET . I I .
[ . . . .
PLAIN ENDED PIPE I I 1 IWITHOUT L CHAMFER ... EFFECTIVE .. LENGTH .. .. . ..
1 EFFECTIVE LENGTHOFPIPES Annex B, the pipe shall have a true impact rate of not more than 10 percent. In case of socket-ended pipes, this test shall be carried out on the plain portion of the pipe taken at least 100 mm away from the root of the socket. 8.2 Ring Stiffness When tested according to the method described in Annex C, the ring stiffhess of the pipe shall be as stated in Table 5. 8.3 Resistance to Internal Hydrostatic Pressure ( ~pe Test ) When tested according to the method described in 1S 12235 ( Part 8 )the pipe shall not fail ( seep, crack, bulge or burst ) during the prescribed test duration of the test and shall meet the requirements given in Table 6. 9 JOINTS 9.1 Elastomeric Sealing Rings
7 PHYSICAL 7.1 Appearance
When viewed without magnification, the internal and external surfaces of the pipe shall be smooth, clean and ffee tlom grooving, blistering and any other surface irregularity, which is likely to prevent conformance of the pipe with this standard. Slight shallow longitudinal grooves or irregularities in the pipe shall be permissible, provided the wall thickness remains within permissible limits. The pipe wall shall not contain impurities or pores. The pipe ends shall be cleanly cut and reasonably square to the axis of the pipe.
The colour of the pipes shall be dark ( any shade of brown ). The pipe shall be uniformly coloured throughout the entire wall. Slight variations in the appearance of the colour are permitted. 7.3 Vicat Softening Temperature The Vicat softening temperature, when determined according to Annex A, shall not be less than 79C. 7.4 Longitudinal Reversion
The longitudinal reversion, when tested according to the method prescribed in IS 12235( Part 5 ), shall not exceed + 5 percent. In the case of socket ended pipe, this test shall be carried out on the plain portion of the pipe taken at least 100 mm away from the root of the socket. The pipe shall not exhibit any blisters, bubbles or cracks on completion of the test. 8 MECHANICAL CHARACTERISTICS 8.1 Resistance to External Blows at OC When tested according to the method prescribed in 4
Elastomeric sealing rings shall be free fi-omsubstances (for example, plasticizers ) that can have a detrimental effect on the polyvinyl chloride of the pipes or fittings used in conjunction with the pipes. The design of the profile and dimensions of the sealing ring is left to the manufacturer, as long as the pipe with the sealing ring meets the requirements of this standard. Where the design of the socket is such that the sealing ring is not firmly fixed in position, the housing for the ring shall be so designed as to minimize the possibility of the ring being dislodged duringinsertion of the pipe ( or spigot of a fitting ) to complete the joint.
IS 15328:2003 Table 2 Wall Thickness and Tolerances ( Clause 6.1.2 ) 9.2 Solvent Cement The solvent cement used shall conform requirements laid down in IS 14182. e 10 PERFORMANCE REQUIREMENTS 10.1 Elastomeric Sealing Ring Joints
10.1.1 Internal Hydrostatic Pressure
+-dn
Nominal Stiffness, SN kN/m2 Dimension Ratio ( SDR ) Pipe Se-ries Nominal Outside Diameter, d., mm
Ring 2 4 8
When tested according to the method described in Annex D, the joint, when assembled according to the manufacturers instructions and subjected to an angulardeflection,@ ofminimum 2 as well as a diametric deflection ( distortion ) of 5 percent of the outer diameter, shall withstand an internal pressure of up to and including 0.05 MPa ( 0.5 bar ) for a minimum of 15 min without leakage. 10.1.2
(Internal Internal Negative Vacuum ) Hydrostatic Pressure
41 s 20 Wall Thickness,
34 S 16.5 e, mm
125 160 200 250 315 400 500 630 NOTES 1 SDR=2S+I
3.2 +0.5 3.9+0.6 4.9+0.7 6.2+0.8 7.9+1.0 9.8+1.2 12.3+ 1.2
3.2+0.5 4.0+0.6 4.9+0.7 6.2+0.8 7.7+1.0 9.8+1.2 12.3+ 1.4 15.4+ 1.7
3.2+0.5 3.7+0.7 4.7+0.7 5.9+0.8 7.3+1.0 9.2+ 1.2 11.7+ 1.4 14.6+ 1.7 18.4+ 1.9
When tested according to the method described in Annex E, the joint, when assembled according to the manufacturers instructions and subjected to an angular deflection, a, of minimum 2 as well as a diametric deflection (distortion ) of 5 percent of the outer diameter, shall withstand an internal negative pressure ( internal vacuum ) of up to and including 0.03 MPa ( 0.3 bar ) for a minimum of 15 min without leakage. 10.2 Solvent Cemented Joints 10.2.1 Internal Hydrostatic
When assembled according to the manufacturers instructions, the joint shall withstand an internal pressure of up to and including 0.05 MPa ( 0.5 bar ) for a minimum period of 15 min without leakage. 10.2.2
( Internal Internal Negative Vacuum) Hydrostatic Pressure
2 The tolerances for nominal diameter and the wall thickness have been calculated as per 7.1.1.1 and7.1.2.1
respectivelyof IS 4985. Elastomeric sealing rings shall be in accordance with one of the types ( Type 1 to Type 6 ) of IS 5382. The manufacturer has to, however, speciQ the type of sealing ring ( namely Type 1, 2, 3, 4, 5 or 6 ) that is being offered.
NOTE A test report or conformity certificate may be obtained from the manufacturer of the sealing ring for conformity to IS 5382. The frequency of this certificate shall be once in three months or whenever source of supply is changed.
When assembled according instructions, the joint shall negative pressure ( internal including 0.03 MPa ( 0.3 bar) 15 min without leakage.
to the manufacturers withstand an internal vacuum ) of up to and for a minimum period of
NOTE Deflection and distortion shall not apply to solvent cemented joints.
11 SAMPLING AND CRITERIA FOR CONFORMITY The sampling procedure and criteria for conformity shall be as given in Annex F. 5
IS 15328:2003 Table 3 Dimensions of Elastomeric Sealing Ring Sockets and Spigot Ends ( Clause 6.1.4 )
All dimensions in millimetres. S1 No. Nominal Diameter Socket d M: (3) 110.4 125.4 160.5 200.6 250.8 316.0 401.2 A Min (4) 32 35 42 50 55 62 70 c M( x (5) 26 26 32 40 70 70 80 1, Spigot
(1) i) ii) iii) iv) v) vi) vii) (2)
Min (6) 60 67 81 99 125
(7) 6 6 7 9 9
viii) ix) NOTES 1 A ~inford. <200 2 A ~in for dn 2250
501.5 631.9
mm, shall be 0.2 d. + 10 mm mm, shall be 0.1 dn + 30 mm
3 Values for B may be smaller for constructions with sealing rings firmly fixed in the groove of the socket. Where sealing rings are firmly fixed and have multiple sealing zones, the dimensions Aminand CmaX should be measured to the effective sealing point as specified by the manufacturer ( see Fig. 4 ). I) Approximate values, when a chamfer is applied.
Table 4 Dimensions of Sockets and Spigot Ends for Solvent-Cemented Joints ( Clause 6.1.4 ) All dimensionsin millimetres.
S1 No. Nominal Diameter dn (2) 110 125 160 200 Socket \ #
(3) 110.1 125.1 160.2 200.3
A Min (4) 110.4 125.4 160.4 200.6
Max (5) 61.0 68.5 86.0 106.0
Min (6) 67 78 100 134
(7) 6 6 7 9
(1) i) ii) iii) iv)
NOTE For soIvent cement sockets, the manufacturer shall declare whether the socket is designed tapered or parallel. If they are parallel, or near parallel, the mean outside diameter of the socket, d .~, shall apply over the entire length of the socket. If the socket is tapered, then the limits for dm apply at the mid point of the socket with a maximum taper of 030.
1)Approximate values, when a chamfer is applied.
FIG. 2 BASICDIMENSIONS OF INTEGRAL SOCKETS ANDSPIGOT ENDSFORELASTOMERIC SIWLING RINGJowrs
FIG. 3 EXAMPLEOFA SEALRETAINING CAP ANDCALCULATION OFTHEWALL THICKNESS OFSOCKETS
FIG. 4 EXAMPLE FORMEASURING THEEFFECTIVE SEALING POINT
EFFECTIVE SEALING POINT AS SPECIFIED BY THE MANUFACTURER
FIG. 5 BASICDIMENSIONS FORINTEGRAL SOCKETS ANDSPIGOTS FORSOLVENT-CEMENTED JOINTS 7,
IS 15328:2003 Table5 Ring Stiffness of Pipes ( Clause 8.2) S1 No.
SDRI Stiffness
12.2 The marking shall show the following:
Ring Stiffness kN.ni-2 (3) <2
Identification of the source of manufacture, Outside diameter, Stiffness class, and Batch or Lot number.
Class (2) 511SN 2
ii) iii) 12 MARKING
41/SN4 341SN8
>4 >8
12.3 The colour of the marking shall be such that it differs from the basic colour of the pipe. 12.4 BIS Certification Marking 12.4.1 Each pipe may also be marked with the Standard Mark. 12.4.1.1 The use of the Standard Mark is governed by the provisions of the Bureau of Indian Standards made Act, 1986 and the rules and regulations thereunder. Details of conditions under which a license for the use of the Standard Mark maybe granted to the manufacturers or the producers maybe obtained from the Bureau of Indian Standards.
12.1 Each pipe shall be clearly and indelibly marked in ink/ paint or hot embossed on white base at intervals of not more than 3 m, but at least once per pipe, in the colour indicated in 12.3. The marking shall be legible without magnification. The marking shall not initiate cracks or other types of defects which adversely influence the performance of the pipe. Marking by indentation reducing the wall thickness not more than 0.15 mm shall be deemed to conform to this clause without infringing the requirements for the wall thickness given in 6.1.2.
Table 6 Requirements of Pipes for Internal Hydrostatic Pressure Test ( Clause 8.3)
S1 No. Test Test Temperature T Test Duration ( Minimum Holding Time ) h (4) 1 I Circumferential Hoop Stress, &fin Requirements
(5) 36 (6) No seepage cracking, bursting }
(2) Acceptance Type test test
(3) 27 60 10 cr 2.emin dem - emin
NOTE Required internal test pressure in MPa, can be calculated as follows: p. where o = hoop stress, in MPa;
dem = measured mean outside diameter, in mm; and emin= measured mean wall thickness of free length of test specimen.
IS 15328:2003 ANNEX A
( Clause 7.3) DETERMINATION OF VICAISOFTENING TEMPERATURE A-1 SCOPE This Annex provides a method for the determination of the Vicat softening temperature for PVC-U pipes. A-2 PRINCIPLE Determination of the temperature at which a standard indenter penetrates 1 mm into the surface of the test specimen, cut from the wall of a pipe or fitting, under a test load of 50 N + 1 N. During the test, the temperature is raised at a uniform rate. The temperature at 1 mm penetration is quoted as the vicat softening temperature ( VST ) in C. A-3 APPARATUS A-3.1 Rod Provided with a load carrying plate, held in a rigid metal flame so that it can move freely in the vertical direction, the base of the frame serving to support the test specimen under the indenting tip at the end of the rod ( see Fig. 6 ). A-3.2 Indenting Tip Preferably of hardened steel, 3 mm long, of circular cross-section, and area 1.000 + 0.015 mm2, fixed at the bottom of the rod. The lower surface of the indenting tip shall be plane and perpendicular to the axis of the rod and be free from burrs. A-3.3 Micrometer Dial Gauge Graduated in divisions of 0.01 mm, to measure the penetration of the indenting tip into the test specimen. The thrust of the dial gauge, which contributes to the thrust on the test specimen, shall be known and shall comply with the requirements of A-3.4. A-3.4 Load-Carrying Plate Fitted to the rod, and suitable weights adjusted centrally so that the total thrust applied to the test specimen can be made up to 50 N + 1 N ( 5.097+ 0.1 kgf ). The combined masses of the rod, indenting tip and load-carrying plate shall not exceed 1 N ( 100 g). NOTE If the rod and the components of the frame
do not have the same linear coefficient of expansion, their differential change in length introduces an error into the readings. A blank test shall be carried out for each apparatus using a test specimen of rigid metal of low coefficient of thermal expansion. This test shall cover the whole range of service ,temperatures and a correction term shall be determined for each temperature. If the correction term ii greater than or equal to 0.02 mm, its algebraic sign shall be noted and the correction shall be applied to each test by adding it to the value observed for apparent penetration. It is recommended that the apparatus be constructed using an alloy with a low coefficient of thermal expansion.
A-3.5 Heating Bath Containing a suitable liquid (see Notes 2 and 3 ) in which the apparatus is placed so that the specimen is at least 35 mm below the surface of the liquid. An efficient stirrer shall be provided. The heating bath shall be equipped with a means of control so that the temperature can be raised at a uniform rate of 50 + 5C/h ( see Note 4 ). This heating rate shall be considered to be met if, over every 5 min interval during the test, the temperature change is within the specified limits.
1 Liquid paraffin, transformer oil, glycerol andsilicone oilsmaybe suitableliquidheat-transfermedia,but other liquids may be used. In all cases, it shall be established that the liquid chosenis stable at the temperature used
and does not affect the material under test. 2 If no suitable liquid can be found for use as a heattransfer medium as defined in Note 1, some different heating arrangement, for example, air, may be used. If air is used as the heat-transfer medium, it should be noted that errors in the quoted sottening point may arise, unless care is taken to correct for possible differences in temperature between the air and the specimen. 3 A uniform rate ~f temperature rise can be obtained by controlling the heat input either manually or automatically, although the latter is strongly recommended. One method of operation found to be satisfactory is to provide an immersion heater adjusted to give the correct rate of temperature rise at the starting temperature of the test, and then to increase the power input (either in the same heater or in a subsidiary heater) by adjustment of a rheostat or a variable transformer. 4 It is desirable to have a cooling coil in the liquid bath in order to reduce the time required to lower the temperature between determinations. This must be removed or drained before starting a test, as boiling of coolant can affect temperature rise.
A-3.6 Thermometer or Any Other Accurate Temperature-Measuring Device Of appropriate range, and with graduations at least at each O.5C. The scale error at any reading shall not exceed 0.5C. If a mercury-in-glass thermometer is used, it should be calibrated for the depth of immersion as required under A-5.4. A-4 TEST SPECIMENS A-4. 1 Preparation A-4.1.1 Two test specimens shall be used for each sample. The test specimen shall consist of segments 9
IS 15328:2003 of rings removed from pipes, limited by cross-sections and having the following dimensions: a) b)
A-4.2 Conditioning Condition the test specimens for 5 min al a temperature about 50C lower than the expected VST of the product under test. A-5 PROCEDURE A-5. 1 A schematic arrangement of the apparatus is given in Fig. 6. A-5.2 Bring the heating bath to a temperature about 50C lower than that expected for the VST of the product under test (see A-3.5, Note 4). Maintain this temperate constant. A-5.3 Mount the test specimen horizontally under the indenting tip ( see A-3.2 ) of the unloaded rod ( see A-3.1 ), which shall rest on the concave surface of the test specimen. In the case of pipes with a wall thickness of less than 2.4 mm, the indenting tip shall rest on the concave surface of the non-flattened segment, the latter being placed on the flattened segment. The indenting tip shall at no point be less than 3 mm from the edge of the test specimen.
50 mm measured along the circumference of the ring, and
Width between 10 mm and 20 mm.
A-4.1.2 If the wall thickness of the pipe is greater than 6 mm, reduce it to 4 mm by machining the outer surface only of the pipe, by a suitable technique. A-4.1.3 Test specimens of thickness between 2 mm, 4 mm and 6 mm shall be tested as they are. A-4. 1.4 If the wall thickness of the pipe or fitting is less than 2.4 mm, each test specimen shall comprise three ring segments superimposed so as to obtain an overall thickness of at least 2.4 mm, The lower segments, which will serve as the base, shall be flattened by heating them to 140C for 15 rein, while resting a thin metal plate on them. A-4.1.5 Use two test pieces for each test, but provide additional test pieces, in case the difference between the results is too great.
ASSEMBLY OF ROD ANO INDENTING TIP SUPPORTING THE LOAO CARRYING PLATE
--. . _ --- --. -=_ ----- ___ ____ ___ TIP SPECIMEN s
Es SPECIMEN suppoRT~
6 SCHEMATIC DIAGRAMOFAPPARATUS FOR DETERMINING VICATSOFTENING TEMPERATURE 10
IS 15328:2003 A-5.4 Immerse the apparatus in the heating bath. The bulb of the thermometer or the sensing portion of the temperature measuring device shall be at the same level as and as close as possible to the test specimen. A-5.5 Position the indenting tip and, after 5 rein, add to the load carrying plate the weight required so that the total thrust on the test specimen is 50 + 1N. Record the reading on the micrometer dial gauge or other indentation-measuring instrument, and set the instrument to zero. A-5.6 Raise the temperature of the bath at a uniform rate of 50 + 5C per hour. Stir the liquid well during the test. A-5.7 Record the temperature of the bath at which the indenting tip has penetrated into the test specimen by 1 + 0.01 mm relative to its starting position, and record the value as the VST of the test specimen. A-5.8 Record the arithmetic mean of the VST of the two test specimens as the VST of the pipe under test, and express the result in C. A-5.9 If the individual results differ by more than 2C, report them in the test report and repeat the test using a new set of at least two test specimens.
( Clause 8.1 ) RESISTANCE TO EXTERNAL BLOWS AT OC ( ROUND-THE-CLOCK METHOD) B-1 SCOPE This Annex specifies a method for the determination of the resistance to external blows of thermoplastics pipes, including unplasticized PVC pipes. This method is applicable to isolated batches of pipe tested at OC. B-2 DEFINITIONS For the purposes definitions apply. of this Annex, the following extruder, is estimated. The severity of this test method can be adjusted by changing the mass of the striker and/or by changing the drop height. It is not technically correct to vary the severity of the test by choosing values of the TIR other than those specified. The maximum acceptable values for the TIR is taken to be 10 percent.
NOTE It should be appreciated that a completely definitive result can be reached only by testing the whole batch. But in practice, a balance is necessary between the statistical possibility of a definitive result and the cost of further testing.
B-2. 1 True Impact Rate ( TIR ) The total number of failures divided by the total number of blows, as a percentage, as if the whole batch had been tested.
NOTE In practice, test specimens are drawn at random from the batch and the result is only an estimate of the TIR for that batch.
B-4 APPARATUS B-4.1 Falling Weight Testing Machine Incorporating the following basic components ( see Fig. 7 ). B-4. 1.1 Main Frame With guide rails or tube, which can be fixed in the true vertical position, to accommodate a striker ( see B-4.1.2 ) and release mechanism to release the striker to fall vertically and freely. B-4.1.2 S/riker Having a nose comprising all or part of a hemisphere, combined with a stem at least 10 mm long, and having dimensions conforming to Fig. 8 and Table 7. The mass of the striker, including any associated weights, shall be selected from the values given in Table 8. Below the stem, the nose shall be of solid steel, polished and free of flats, 11
B-2.2 Failure Shattering or any crack or split on the inside of the pipe that was caused by the impact and that can be seen by the naked eye ( lighting devices may be used to assist in examining the specimens ). Indentation of the test specimen is not considered a failure. B-3 PRINCIPLE Test pieces are subjected to blows from a falling striker, of specified mass and shape, dropped from a known height onto specified positions around the circumference of the test specimen. The true impact rate ( TIR ) of the batch, or production run from an
indentations or other imperfections, influence the result.
Table 7 Dimensions of the Nose of the Striker ( Clause B-4.1.2) All dimensionsin millimetres. S1 No. (1)
--GRADUATEO SCALE VERTICALLY ADJUSTABLE FOR OIFFERENT SIZES OF PIPES
25+1 90+1
(6) Free Free
dz~
Table 8 Classified Striker Mass and Drop Height Conditions for the Falling Weight Impact Test ( Clause B-4.1.2)
dsoL1o
ENLARGEOVIEW
50 64 80 100
FIG. 7 IMPACT TESTING MACHINE
+~s
B-4. 1.3 Rigid Specimen Support Consisting of a 120 V-Block at least 200 mm long positioned so that the vertical projection of the point of impact of the falling striker is within 2.5 mm of the axis of the V-block ( see Fig. 7 ) B-4. 1.4 Release Mechanism Such that the striker can fall from a variable height which can be adjusted to any height up to at least 2 m, measured from the top surface of the test specimen, with an accuracy of+ 10 mm. B-5 TEST SPECIMENS
8A Type d25 ( for Strikers of Mass 0.5 kg and 0.8 kg )
I -. , . + --
Test specimens of length 200 + 10 mm shall be cut from pipe selected at random from the batch, or the production run from an extruder.
fOmin.
The cut ends shall be square to the axis of the pipe, clean and free from damage. For pipes with outside diameters greater than 40 mm, a straight line shall be drawn along the length of each test specimen at a random position. Further lines shall be drawn at equal distances around the pipe piece so that each test specimen has a number of lines given in Table 9. The number of blows required is given in B-6. For pipes with outside diameters less than or equal to 40 mm, only one blow pertest specimen shall be made. 12
8B Type d90 ( for Strikers of Mass 21 kg) FIG. 8 NOSES OF STRIKERS
IS 15328:2003 Table 9 Number of Equidistant Lines to be Drawn on Test Specimens ( Clause B-5) S1 No.
Nominal Outside Diameter of Pipe mm (2) Number of Equidistant Lines to be Drawn (3)
B-6 SAMPLING TO CONFIRM VALUE OF TIR ON ISOLATED BATCHES If the number of failures from a sample falls into Region A of Fig. 9 ( for a TIR of less than or equal to 10 percent), then reasonable confirmation is obtained that the batch has a TIR less than or equal to the specified level. If the number of failures falls into the Region C of Fig. 9, the batch can be judged to have a TIR greater than the specified value. If the number of failures falls into the Region B of Fig. 9, in general fi.uthertest specimens should be taken so that a decision can be arrived at. The decision shall be made by using the cumulative result of all the test specimens examined from the batch under consideration.
NOTE The graph is provided only to indicate the principal of the test method and is only a guideline. Evaluation of the test results shall be made based on Table 3. If the number of blows exceeds 124, see Fig. 9 for assessment of results.
(1) i) ii) iii) iv) v) vi)
125 140 160 180 200 225 250 280 >315 NOTE
6 8 8 8 12 12 12 16 16
Initially,a minimum of 25blowsshallbe made. Incaseno failureoccurs, the lot is deemed to have passed.
In case of 4 or more failures, the lot is treated as rejected. In case 1, 2 or 3 failures occur at this stage ( after 25 blows ), the test has to be continued further till the results fall into either Region A or Region C, before arriving at a decision of acceptance or rejection respectively.
B-7 CONDITIONING B-7. 1 The test specimens shall be conditioned in a
800 t 600 u-l 500 3
0 fJlo -1 m ~ 300
z g : 100 + : 80 60 50 40 1 23 4 5678910
30 LO 50607080
between regions are calculated o.5+p[np(l-p)]-J5 o.5+p[( /7p(l-p)]-05
s/lJ~=r?ps~,~=rtp+ where P p = =
1.282, O.lO(TIR), and
= Number of blows.
FIG. 9 NUMBER OFTESTPIECES FOR 10 PERCENTTIR (AT 90 PERCENT CONFIDENCE LEVEL) 13
IS 15328:2003 liquid bath or in air at a temperature of O+ 1C for at least the period given in Table 10. In case of disputes over the results, a liquid bath shall be used. B-7.2 Test specimens with wall thickness up to 8.6 mm shall be tested within 10 s of their removal from air conditioning, or within 20s of their removal from liquid conditioning, as applicable. Test specimens with wall thickness greater than 8.6 mm shall be tested within 20 s of their removal from air conditioning or within 30s of their removal from liquid conditioning, as applicable. If this interval is exceeded, the test specimen shall be returned immediately to the unit for re-conditioning for a further period of at least 10 min. Table 10 Conditioning Period ( Clauses B-7.1 and8. 1 ) S1 No. Wall Thickness,
mm e Conditioning Min t Liquid Bath (1) i) ii) iii) (2) <8.6 8.6 to 14. I (3) 15 30 60 Period, Air (4) 60 120 240 .
B-8 PROCEDU~ B-8.1 The mass of the falling striker and the drop height appropriate to the pipe shall be as specified in Table 10. B-8.2 For pipes of outside diameter 40 mm or less, subject the test specimen to only single blow. B-8.3 For pipes of outside diameter greater than 40 mm, subject the test specimen to a blow by allowing the striker to fall on one of the marked lines. If the test specimen passes the test, rotate it in the V-block to the next marked line and again subject it to a blow tlom the falling striker, after re-conditioning if necessary ( see B-7 ). B-8.4 Continue this procedure until the test specimen fails the test, or until all the marked lines have been struck one blow. B-8.5 If required, carry out the test on subsequent test specimens, subjecting each one to the required number of blows. B-9 TEST REPORT The result shall reexpressed as A, B or C for the batch or the production run from an extruder, as follows: a) b) A If the TIR is below 10 percent;
B If no decision can be made on the basis of the number of test specimens used ( see 10.3); and
Above 14.1
B-7.3 For pipes with smooth inside and outside surfaces, the wall thickness of the pipe to be tested shall be the total wall through the pipe section. B-7,4 For pipes which are corrugated or ribbed externally, the wall thickness is the thickest wall of the pipe cross-section,
C If the TIR is greater than 10 percent.
NOTE The number of failed testspecimens,as compared to the total number of blows, should not be expressed as a percentage, to avoid confusion with the TIR, of which the percentage is only an estimate.
( Clause 8.2) DETERMINATION c-1 SCOPE OF RING STIFFNESS OF THERMOPLASTICS PIPE horizontally is compressed vertically between two parallel plates moved at a constant speed, which is dependent of the diameter of the pipe. The ring stiffhess is calculated as a function of the force necessary to produce a deflection of 3 percent diametrically across the pipe. C-3 DEFINITIONS C-3.1 Initial Internal Diameter (~) The average of the inside diameters of the test specimen expressed in metres (m). 14
This Annex covers the method for the determination of the ring stiffness of thermoplastics pipes, including unplasticized polyvinyl chloride ( PVC-U ) pipes having a circular cross-section, under parallelplate loading C-2 PRINCIPLE The ring stiffness is determined by measuring the force and the deflection while deflecting the pipe at a constant rate. A length of pipe supported
IS 15328:2003 C-3.2 Vertical Deflection (y) Measured change of the inside diameter in the directon of the load application expressed in metres (m). C-3.3 Percentage Deflection (P) The ratio of the reduction in pipe inside diameter to the pipe initial diameter expressed as a percentage of the initial inside diameter. C-3.4 Load ( F ) The load applied to the pipe to produce a given percentage deflection, expressed in kilonewtons ( kN ). A-3.5 Length ( L ) The average length of the test specimen expressed in metres ( m ). C-3.6 Ring Stiffness ( S ) The value obtained by dividing the force per unit length of specimen by the resulting deflection in the same units at the prescribed percentage deflection and multiplied by a factor, expressed in kilonewtons per square metre ( kN/m2 ). C-4 APPARATUS C-4. 1 Testing Machine A properly calibrated compression-testing machine of the constant-rateof-crosshead-movement type, shall be used for the tests. The rate of head movement shall be in accordance with Table 11, with sufficient force and travel to produce the specified deflection through the parallel plates. Table 11 Deflection Speeds ( Clauses C-4,1 and C-7.4 )
S1 No. Nominal Diameter of Pipe, dn mm (2) loo<dns 200 Deflection Speed
or the plate, or in any way affect the load deflection measurements. Changes in diameter maybe measured during loading by continuously recording plate travel. C-4.4 Measuring Devices The measuring devices shall be capable of measuring the following:
Length of the test specimen to within 1 mm; Internal diameter of the test specimen to within 0.5 percent; and Change in inside diameter of the test specimen in the direction of loading; and with an accuracy of 0.1 mm, or 1 percent of the deflection, which ever is greater.
C-4.5 Force-measuring device capable of determining to within 2 percent the force necessary to produce a 1 percent to 4 percent deflection of the test specimen diametrically across the test specimen. C-5 TEST SPECIMENS C-5.1 Marking The pipe from which the specimens are to be cut shall be marked on the outside along its full length with a line parallel to the pipe axis. Three test specimens, marked a, b, and c, shall be tested for each sample of pipe. The ends of the test specimens shall be reasonably square to the axis of the pipe, free of burrs and jagged ends and the lengths shall conform to C-5.2. C-5.2 Length C-5.2.1 The length of the test specimen shall be determined by calculating the arithmetic mean of n length measurements, made to within 1 mm, equally spaced around the circumference of the pipe in conformation with Table 12. For each individual test specimen, the smallest of the length measurements shall not be less than 0.9 times the largest. Table 12 Number of Length Measurements ( Clause C-5.2.1)
mmlmin
(3) 5* I 10+2 20*2
200< dn <400 400< dn <1000
C-4.2 Loading Plates The load shall be applied to the specimens through two parallel steel bearing plates. The plates shall be flat, smooth and clean. The thickness of the plates shall be sufficient so that no bending or deformation occurs during the test, but it shall not be less than 6.0 mm. The plate length shall equal or exceed the specimen length and the plate width shall not be less than the pipe contact width at maximum pipe deflection plus 25 mm. C-4.3 Deformation ( Deflection) Indicator The change in the inside diameter or deformation parallel to the direction of loading, shall be measured with a suitable instrument accurate to the nearest 0.25 mm. The instrument shall not support the pipe test specimen 15
Nominal Diameter of Pipe, dn
Number of Measurements,
dn<200
200 <d. <500
C-5.2.2 For pipes with nominal diameter less than or equal to 1500 mm, the average length of each test specimen shall 300 + 10 mm. C-5.2.3 For pipes that have a nominal diameter, dn, greater than 1500 mm, the average length of each test specimen sh~ll be 0.2 dn.
IS 15328:2003 C-5.3 Inside Diameter Determine inside diameter, di,, di~, diC,ofeach test specimen as the arithmetic mean of four measurements made at 45 intervals along one cross-section of the test specimen. Finally, calculate the average internal diameter, di, of all three test specimens using the following equation: di=(di, +di~+di~)/3 has been found, place the first specimen with the thinnest portion on top. Rotate each successive specimen 35 and 70. If no minimum wall thickness has been found, use any base line. C-7.3 With the deflection indicator in place, bring the upper plate in contact with no more load than necessary to hold it in place. This establishes the beginning point for the measurement of subsequent deflections. C-7.4 Compress the specimen at a constant speed specified in Table 11, while continuously recording the force and deflection. C-7.5 If the load/deflection plot, which is typically a smooth curve, indicates that the zero point may be incorrect ( see Fig. 10 ), extrapolate back the initial straight-line portion of the curve and use the intersect with the horizontal axis as the ( 0,0 ) point ( origin ). C-8 CALCULATIONS C-8.1 Calculate the ring stiffness, S., S~, SC,of each of the three test specimens using the following equations: s, = 0.0186 + 0.025 yJdi. Fa/Laya
s~ = 0.0186
C-5.4 Average Outside Diameter
Measure the average outside diameter of each test with IS 12235.( Part 1 ). specimen in accordance
C-5.5 Wall Thickness Measure the wall thickness in accordance with IS 12235 ( Part 1 ) at eight evenly spaced points along the perimeter of each test specimen. Note the maximum and minimum values and calculate the average. Mark the point of minimum wall thickness, if any, on each test specimen. C-6 CONDITIONING The test specimens shall beat least 24 h old. For type testing and in cases of dispute, the age of the test shall be 21 + 2 days. C-6.1 Condition the pipe samples for at least 24 h in air, at a temperature of 27 G 2C, and conduct the test at the same temperature. C-6.2 In case of dispute, the specimens shall be conditioned at a temperature of 23 + 2C and a relative humidity of 50 + 5 percent for 40 h and the test conducted under the same conditions. C-7 PROCEDURE C-7. 1 Locate the pipe specimen with its longitudinal axis parallel to the bearing plates and centre it laterally in the testing machine. C-7.2 If an orientation of minimum wall thickness
+ 0.025 yddi. Fb/Lbyb
0.018-6 + 0.025 yC/di. FC/LCyC force, in kilonewtons, corresponding to 3.0 percent pipe deflection; length, in m, of the test specimen; and deflection, in m, corresponding to 3.0 percent deflection, that is, y/di = 0.03.
where F= L= Y=
Calculate the ring stiffness of the pipe, in kilonewtons per square metre, as the mean of these three values, using the following equation: s=(sa+s~+sc)/3
ESTIMATED ZERO~
1 00) \ I
.#YARENT ERO
FIG. 10 LOADDEFLECTION CURVE
IS 15328:2003 C-9 TEST REPORT Test report information: a) b) c) d) shall contain the following t) g) and h) j e) The calculated vaIues of S., Sb and SC of the ring stiffness of each test specimen, to three decimal places; The calculated value of the ring stiffness S, to two decimal places; If required, a force/deflection plot for each test specimen; Any factors which may affect the results; and Date of report.
Complete identification of the samples tested; All dimensions of each specimen; Conditioning environment; time, temperature
Testing temperature and environment;
ANNEX (Ch.se
10.1.1 )
TEST METHOD FOR LEAKTIGHTNESS OF ELASTOMERIC SEALING RING TYPE SOCKET JOINTS UNDER POSITIVE INTERNAL PRESSURE AND WITH ANGULAR DEFLECTION D-1 SCOPE This Annex specifies a method of testing the Ieaktightness under positive pressure of assemblies of polyvinyl chloride ( PVC-U ) pipes with elastomeric sealing ring type socket joints including the following: a) b) c) Single sockets of pipes; Double sockets; and Sockets of figings. within the socket. A typical arrangement is shown in Fig. 11. D-3.2 A pressure contro) device connected to the test specimen and capable of applying and maintaining a variable internal hydrostatic pressure of the PVC-U pipe section mounted into the socket of the component to be tested. D-3.3 The assembly shall be carried out in accordance with the socket manufacturers instructions. D-3.4 A pipe of the same nominal pressure as that of the socket shall be used for the te$t. D-3.5 The length of the pipe section shall that the free length, L, between the socket end-seal is equal to five times the normal diameter, d,, of the pipe with a minimum of and a maximum of 1500 mm. be such and the outside 500 mm
It also applies to elastomeric sealing ring type sockets made of ductile iron for use with PVC-U pressure piping. D-2 PRINCIPLE A joint assembly as a test specimen consisting of a PVC-U pipe mounted into a PVC-U socket is exposed, within a specified temperature range, to a specified internal pressure regime for a specified time while the pipe is subject to an angular deflection in the socket. While under pressure the test piece is monitored for signs of leakage.
NOTE It is assumed that the following test parameters are set by the standard making the reference to this standard: a) b) Test pressure, and Number of test specimens to be used.
NOTE The mean outside diameter, dem, of the pipe should preferably conform to the minimum specified value, and the socket dimensions ( mean inside diameter, dim,and the diameter of the groove for housing the sealing ring ) should preferably conform to the maximum values stated by the manufacturer, in order to have dimensions as close to the extreme Iimits of the relevant tolerances. D-4 PROCEDURE D-4. 1 Secure the socket, without any deformation, to the solid framework and align the pipe section with the axis of the socket.
D-3 APPARATUS D-3. 1 Framework Comprising of at least two fixing devices, one of which is movable to allow angular deflection, vertical or horizontal, to be applied
D-4.2 Incline the pipe in the test apparatus, determine the free angle of deflection, u, which the joint can tolerate without application of force. Ifct22, firmly anchor the pipe to maintain the deflected pipe in this position for the remainder of the test.
>lOmm L= 5dn (min. 500mm ANO mox.1500 mm-)
FIG. 11 TYPICALARRANGEMENT OFFRAMEWORK If ct <2, carry out the test at a deflection of 2 by forcing the pipe to that degree of deflection. D-4.3 Measure the mean outside diameter at a point 0.5 d. away from the mouth of the socket. Calculate the amount of distortion required and tighten the bolts of the distortion clamp until the required distortion is achieved. D-4.4 Fill the test specimen with water at a temperature of 27 + 5C and release any trapped air. D-4.5 Condition the test specimen assembly for a period of at least 20 min to ensure equalization of temperature. D-4.6 While testing in accordance with 5.7: a) Maintain the ambient temperature within &5C of any temperature between 20 and 32C; and Examine the joint during the whole test cycle and record any sign of leakage. D-4.7 Apply and raise the hydrostatic pressure slowly over a period of not less than 15 min to a minimumof0.05MPa (0.5 bar). Maintainthepressm atthis value for a minimum of 15 min. D-5 TEST REPORT The test report information. a) b) c) d) e) shall include the following
Nominal pressure class of the PVC-U pipe and socket used for the test; Angle of deflection, et, used for the test; Ambient temperature during the test; Information of the leaktightness of the joint Any factors which may have tiected the results, such as, any incidents or any operating details not specified in this standard; and
t) Date of the test.
( Clause 10.1.2) TEST METHOD FOR LEAKTIGHTNESS OF ELASTOMERIC SEALING RING TYPE SOCKET JOINTS UNDER NEGATIVE INTERNAL PRESSURE AND WITH ANGULAR DEFLECTION E-1 SCOPE
This Annex specifies a method of testing the leaktightness under negative pressure of assemblies
It also applies to elastomeric sealing ring type sockets made of ductile iron for use with PVC-U pressure piping. E-2 PRINCIPLE A joint assembly as a test specimen consisting of a PVC-U pipe mounted into a PVC-U socket is exposed, within a specified temperature range, to a specified negative pressure for a specified time while the pipe 18
of polyvinyl chloride ( PVC-U ) pipes with elastomeric sealing ring type socket joints including: a)
Single sockets of pipes; Double sockets; and Sockets of fittings.
IS 15328:2003 is subject to an angular deflection in the socket. While
under vacuum the test ,piece is monitored of leakage. NOTE It is assumed that the following test parameters are set by the standard making the reference to this standard: a) b) Test pressure, and Number of test specimens to be used. for signs dm, and the diameter of the groove for housing the sealing ring ) should preferably conform to the maximum values stated by the manufacturer, in order to have dimensions as close to the extreme limits of the relevant tolerances.
E-4 PROCEDURE E-4. 1 Secure the socket, without any deformation, to the immovable portion of the framework and align the pipe section with the axis of the socket. E-4.2 Incline the pipe in the test apparatus,determine the free angle of deflection, cz, which the joint can tolerate without application of force.
Ifct> 2, firmly anchorthepipeto maintainthe deflected pipe in this position for the remainder of the test.
E-3 APPARATUS E-3.1 Framework Comprisingof atleasttwo fixing devices, one of which is movable to allow angular deflection, vertical or horizontal, to be applied within the socket. A typical arrangement is shown in Fig. 12. E3.2 Vacuum Pump and Control Device-Connected to the test specimen, preferably at the immovable end of the apparatus, and capable of applying and maintaining two required levels of negative pressure of the PVC-U pipe section mounted into the socket of the component to be tested. E-3.3 An isolation valve between the test piece and the vacuum pump. E-3.4 The assembly shall be carried out in accordance with the socket manufacturers instructions. E-3.5 A pipe of the same nominal pressure as that of the socket shall be used for the test. E-3.6 The length of the pipe section shall be such that the free length, L, between the socket and the end-seal is equal to five times the normal outside diameter, d., of the pipe with a minimum of 500 mm and a maximum of 1500 mm. NOTE The mean outside diameter, dm, of the pipe
should preferably conform to the minimum specified value, and the socket dimensions ( mean inside diameter,
If rx <2, carry out the test at a deflection of 2 by forcing the pipe to that degree of deflection. E-4.3 Measure the mean outside diameter at a point 0.5 d. away from the mouth of the socket. Calculate the amountof distortionrequiredandtighten the bolts of the distortion clamp until the required distortion is achieved. E-4.4 While testing, maintain the ambient temperaturewithin * 5C of any temperaturebetween 20 and 32C. E-4.5 Apply a negative pressure ( vacuum ) to the test piece until a constant gauge pressure of -0.03 Mpa ( -0.3 bar) is achieved. E-4.6 Isolate the vacuum pump fr~rnthe test piece, but not from the control device. Record the change in the negativepressurefor 15 min. During this period, the variation in negative pressure should not be more than * 10 percent of the required test pressure. E-4.7 Again, isolate the vacuum pump from the test piece, monitor the pressure for a fhrther 15 min and record any changein the negative pressure.
>lOmm L= 5dn (min. 500mm AND mox.1500 mm)
. =%
FIG. 12 TYPICALARRANGEMENT OFFRAMEWORK 19
IS 15328:2003 E-5 TEST REPORT The tesi report shall include the following information: a) b) Nominal pressure class of the PVC-U pipe and socket used for the test; Angle of deflection, et, used for the test; ~ c) d) e) Ambient temperature during the test; Information of the Ieaktightness of the joint; Any factors which may have affected the results, such as, any incidents or any operating details not specified in this standard; and Date of the test.
( Clause11 ) SAMPLING AND CRITERIA FOR CONFORMITY F-1 ACCEPTANCE TESTS F-1. 1 Acceptance tests are carried out on samples selected from a lot for the purpose of acceptance of the lot. F-1.2 All PVC pipes in a single consignment of the same class, same size and manufactured under essentially similar conditions shall constitute a lot. F-1.3 For ascertaining the conformity of the lot to the requirements of the standard, samples shall be tested from each lot separately. F-1.4 Visual and Dimensional Requirements F-1 .4.1 The number of test samples taken from a lot shall depend on the size of the lot and the outside diameter of the pipes, and shall be in accordance with Table 13. F-1 .4.2 These pipes shall be selected at random from the lot and in order to ensure the randomness of the selection, a random number table shall be used. For guidance, and use of random number tables, IS 4905 may be referred to. In the absence of a random number table, the following procedure may be adopted:
from any pipe in the lot, count 1, 2, 3 . . . and so on up to r, where r is the integral part of N/n, N being the number of pipes in the lot, and n the number of pipes in the sample. Every rth pipe so counted shall be withdrawn so as to constitute the required sample size. Starting
deemed not to have met these requirements, if the number of defective found in the first sample is greater than or equal to the corresponding rejection number given in COI7 of Table 13. If, however, the number of defective found in the first sample lies between the corresponding acceptance or rejection numbers given in CO1 6 and 7, a second sample of the size given in CO1 4 shall be taken and examined for these requirements. The lot shall be considered to have satisfied these requirements if the cumulative sample is less than or equal to the corresponding acceptance number given in CO1 6, otherwise not. F-1.5 Reversion Test F-1.5.1 The lot, having satisfied visual and dimensional requirements, shall be tested for reversion. F-1.5.2 For this purpose, the number of pipes given for the first sample in COI3 of Table 14 shall be taken from the lot. The sample pipe failing in reversion shall be considered to be defective. The lot shall be deemed to have met the requirements given in this standard for the reversion test if the number of defective found in the first sample is less than or equal to the corresponding acceptance number given inCO15. The lot shall be deemed not to have met the requirements, if the number of defective found in the first sample is greater than or equal to the corresponding rejection number given in COI6. If, however, the number of defective in the first sample lies between the corresponding acceptance and rejection numbers given in co] 5 and 7, a second sample of the size given in COI3 shall be taken and examined for the requirement. The lot shall be deemed to have satisfied the requirements, if the number of defective found in the cumulative sample is less than or equal to the corresponding acceptance number given in COI6, otherwise not. F-1.6 Vicat Softening Temperature F-1.6.1 The lot, having satisfied the visual and 20
F-1.4.3 The number of pipes given for the first sample in CO1 4 of Table 13, shall be taken from the lot and examined for visual and dimensional requirements given in 6, 7.1 and 7.2. A pipe failing to satisfy any of these requirements shall be considered defective. The lot shall be deemed to have satisfied these requirements, if the number ofdefectives found in the first sample is less than or equal to the corresponding acceptance number given in COI6 of Table 13. The lot shall be
IS 15328:2003 Table 13 Scale of Sampling for Vkual Appearance and Dimensional Requirements ( Clauses F-1.4.1 arrdF-l .4.3 )
S1 No. (1) i) ii) Number of Pipes in the Lot (2) up to 1000 Sample Number (3) First Second 1001 to 3000 First Second iii) 3001 to Sample Size (4) 13 13 20 20 32 32 50 50 Cumulative Sample Size (5) 13 26 20 40 32 64 50 100
Acceptance Number (6)
o 1 0 1 0 3 1 4
Rejection Number (7) 2 2 2 2 3 4 4 5
Table 14 Scale of Sampling for Reversion and Vicat Softening Temperature Tests ( Clauses F-1.5.2 andF-l .6.2 )
Number of Pipes in the Lot (1) Sample Number (2) Sample Size (3) Cumulative Sample Size (4) Acceptance Number (5) Rejection Number (6)
For nominal diameters up to and including 110 mm up
5 5 8 8 13 13 20 20
5 10 8 16 13 26 20 40
1000 I and above
For nominal diameters above 110 mm up
3 3 5 5 8 8
3 6 5 10 8 16
dimensional requirements, shall be tested for Vicat softening temperature. F-1 .6.2 For this purpose, the procedure adopted for sampling and criteria for conformity shall be the same as given in F-1.5, using Table 14. F-1.7 Resistance to External Blows at OC
F-2 TYPE TESTS F-2.1 Type tests are intended to prove the suitability and performance of a new corpposition or a new size of pipe, Such tests, therefore, need to be applied only when a change is made in polymer composition or when a new size is to be introduced. F-2.1. 1 Resistance to Internal Hydrostatic
Preksure ( ~pe Test )
F-1 .7.1 The lot, having been found satisfactory according to F-1.4, F-1.5 and F-1.6, shall be tested for resistance to external blows at OC. F-1 .7.2 For this purpose, the procedure adopted for sampling and criteria for conformity shall be as specified in Table 15. 21
For this test, the manufacturer or the supplier shall supply furnish to the testing authority, three samples of pipes of different diameters and different classes, selected preferably from a reguIar production lot.
F-2.1.1.1
IS 15328:2003 Table 15 Scale of Sampling for Resistance to External Blows
(Clause F-1 .7.2)
Number of Pipes in tbe Lot (1) For all sizes up to 3000 First Second 3001
Sample Number (2)
Cumulative Sample Size (4)
Acceptance Number (5)
Rejection Number (6)
3 3 5 s 8 8
NOTE The numbers mentioned in CO13 to 6 in the table represent the number of times the test is to be carried out and do not represent either the number of pipe samples or the number of blows or the number of failures.
Three samples so selected shall be tested for compliance with the requirements of the type test given in Table 6.
P-2.1.1.2
samples not exceeding the original number and subject them to the type test. If, in the repeat test, no single
F-2.1 .1.3 If all the three samples pass the requirements of the quality test, the type of pipe under consideration shall be considered to be eligible
for type approval, period which shall be normally valid for a
failure occurs, type of pipe shall be considered for type approval. If any of the samples fails in the repeat tests, the type of pipe shall not be approved. The manufacturer or the supplier maybe asked to improve the design and resubmit the product for type approval. F-2.1.1.5 At the end of the validity period (normally one year) or earlier, if necessary, the testing authority may call for fresh samples for ~pe test for the purpose of type approval.
In case any of the samples at its discretion, fail in this test, may call for fresh
F-2.1.1.4
the testing authority,
IS 15328:2003 ANNEX ( Iorewor~ G )
COMMITTEE COMPOSITION Plastic Piping System Sectional Committee, CED 50
Engineer-in-Chiefs Branch, Army Headquarters, New Delhi
SHRI K. SHRI N.
Representative(s) PRABHAKAR RAO P. PATEL Alternate )
Chairman )
Ahmedabad Municipal Corporation, Ahmedabad
SHRI V. B. PARMAR(
Brihanmumbai Mahanagar Palika, Mumbai
DEPUTY HYDRAULIC ENGINEER(
Building Materials New Delhi
SHRI J. SEN GUPTA
Calcutta Municipal Corporation,
SHRI D. K. SANYAL SHRI A. K. BISWAS (
Carbon Everflow Limited, Nashik
SEEMA VAIDYA SHRI B. M. VALASKAR (
SHRI SURESHKUMAR SHARMA (
Central Institute of Bhopal/Lucknow
DR VUAY KUiMAR DR SANIA AKHTAR ( AOVISER
Central Public Health Environment Engineering Organization, New Delhi Central Public Works Department, New Delhi
(PHE) ASSISTANT ADWSER (PHE) ( Alternate )
CHIEF ENGINEER( DESIGN ) SUPERINTENDING ENGINEER (S&
S) ( Alternate )
Chennai Metropolitan Chennai Delhi Development
Water Supply and Sewerage Board,
SHRI R. N. SURIYA NARAYAN SINGH THIRU V. SIVAKUMARAN(
DIRECTOR ( MATERIALS MANAGEMENT ) SHRI SUPERINTENDING ENGINEER( DESIGN ) (
Delhi Jal Board, New Delhi
SHRI L. N. KAPOOR (
SHRI SURINDEk NATH SHRI A. K. NAGAR (
Directorate General of Supplies and Disposals, Mumbai /Patna
SHRI A. K. M. KASHYAP (
Engineer-in-Chiefs
Branch, Army Headquarters, New Delhi
SHRI R. A. DUBEY SHRI AJAY SHANKAR, SE (
EPC Industries Private Limited, Nashik
SHR1VINAYAK V. SHEMBLKAR(
Fioolex Industries Limited, Pune Housing and Urban Development New Delhi Corporation Limited,
DR DHANANIAY RAW SHRI K. SUBRAMANIAN SHRI P. R. SRIVASTAVA (
Institute of Co-operati e Management, imited, Jalgaon
DR M. K. PANDEY (
SHRI S. NARAYANASWAMY(
Ahernate )
( Continued on page 24) 23
IS 15328:2003 ( Continued from page 23)
Organization Kerala Water Authority, Thiruvananthapuram
DEPUTY CHIEF ENGINEER(MTRL MGT SHRI S. SUNDRAiV SHRI P.
KWH Pipe India Limited, Raigad
V. KULKARNI ( Alternate )
Mahanagar Telephone Nigam Limited, New Delhi
SHRI A. K. NAGAR (
National Environmental Nagpur NOCIL Limited, Thane
DR M. V. NANOTI DR S. P. PANDE ( SHRI R. K. BHATIA
Alternate ) )
SHRI A. R. PARASURAMAN ( Alternate
Public Health Engineering, Bhubaneswar
MAHAPATRA-
SHRI G. C. PATRA(
Public Health Engineering, Public Health Engineering
Roorkee Department, Jaipur
SHRI SUDESHKUMAR SHARMA SUPERINTENDING ENGINEER EXECUTIVE ENGINHEER(
SHRI GULAM AHMED SHRI SUBHASHSANZGIRI
SHRI V. B. RAMARAO(
RITES, New Delhi Supreme Industries Limited, Jalgaon
SHRI C. SHRI G.
SHARMA SAXENA
SHRI WILLIAM HANDONES (
JOINT CHIEF ENGINEER( CONTRACT ) ENGINEERINGDIRECTOR (
U.P. Jal Nigam, Lucknow
MATERIALS MANAGER CHIEF ENGINEER(
PPR & D ) ( Alternate )
Uniplas India Limited, New Delhi Vinplex India Private Limited, Chennai
MANAGING DIRECTOR SHRI G.
K. SRINIVASAN Alternate )
SHRI P. SAI VENKATA PRASAD (
In personal capacity Gurgaon )
(C-478B,
Sushanl Lok, Phase 1,
O. P. RATRA
In personal capacity ( 196 Gulmohar Park, New Delhi 110049) BIS Directorate General
SHRI KANWAR A. SINGH SHRI S. K. JAIN, Director and Head (CED) [.Representing Director General ( Ex-ofJcio ) ]
SHRI J. K. PRASAD Director
(CED), BIS
SHRI R. K. GUPTA Joint Director
( Continued on page 25)
( Continued from page 24)
PVC and ABS Piping System Subcommittee, CED 50:3
Vinplex India Pvt Limited, Chennai
SHRI G. K. SRINIVASAN(
Convener)
SHRI P. SAIVANKATAPRASAD (
SHRI S. S. GUPTA SHRI DEEPAK PODDAR SHRI L. N. PODDAR (
Ashirvad Enterprises,
Alternate ) Ahernate )
HYDRAULIC ENGINEER DEPUTY HYDRAULIC ENGINEER(
Central Institute Bhopal
DR VIIAIKUMAR DR SONIA AICUTAR( CHIEF ENGINEER( CSQ ) EXECUTIVE ENGINEER( S & S ) (
ENGINEER-IN-CHIEF (W) SHRI
CHADHA (
Delhi Test House, New Delhi Department of Telecommunications, New Delhi
SHRI M. C. GOEL SHRI V. L. VENKATARAMAN SHRI P. ADINARAYANA (
Alternate ) Alternate ) Alternate ) Alternate )
Directorate General Kolkata/New Delhi
SHRI RAIENDER PRASAD SHRI N. K. KAUSHAL (
Finolex Industries Limited,
DR DHANANIAY RAU SHRI V.
KANDEKAR (
SHRI S. NARAYANASWAMI SHRI L. JAGANNATHAN(
K. SINGHAL ( Alternate )
National Organic Chemical Industries Limited, Thane
SHRIP. K. BHATIA SHRIM. M. SHAH ( Alternate )
SHRI M. V. PRASAD (
Rex Poiyextrusion RITES, New Delhi
Limited, Sangali
SHRI CHANDERSEKHAR SHRI C. K, SHAR~A DEPUTY CHIEF INSPECTORENGINEER (
Alternate) Alternate )
Supreme Industries, Jalgaon
SHRI W. MANDONCA SHRI G. K. SAXENA (
ENGINEER-IN-CHIEF JOINT CHIEF ENGINEER( MATERIAL ) (
Tamil Nadu Water Supply and Sewage Board, Chennai
SHRI P. M. HARINATH DEPUTY DIRECTOR (CR) (
Consultants India Limited, New Delhi
SHRIS. N. JHA SHRIM. K.
SRIVASTAVA(
In personal capacity ( C-478B, Sushant Lok, Phase 1, Gurgaon ) In personal capacity ( /96 Grdmohar Park, New Delhi 110049)
SHRI O. P. RATRA SHRI KANWAR A. SINGH
Bureau of Indian Standards BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promote harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country. Copyright 131S has the copyright of all its publications. No part of these publications maybe reproduced in any form without the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director (Publications), BIS. Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed periodically; a standard along with amendments is reaffirmed when such review indicates that no changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of BIS Catalogue and Standards : Monthly Additions. This Indian Standard has been developed from Doc : No. CED50(5931 ). Amendments Issued Since Publication
Amend No. Date
Headquarters: Manak Bhavan, 9 Bahadur Shah Zafar Marg, New
Telephones: 23230131,23233375,2323
Telegrams: Manaksanstha ( Common to all offices)
Central: Manak Bhavan, 9 Bahadur Shah Zafar Marg NEW DELHI 110002
Eastern: 1/1 4 C. I. T. Scheme KOLKATA Northern: 700054 Sector 34-A, CHANDIGARH 160022 VIl M, V, 1. P. Road, Kankurgachi
23237617 { 23233841
23378499,23378561 { 23378626,23379120 603843 { 609285
SCO 335-336,
IV Cross Road,
Western : Manakalaya, E9 MlDC, Marol, Andheri (East) MUMBAI 400093
22541216,22541442 { 22542519,22542315 28329295,28327858 { 28327891,28327892
AHMEDABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE. FARIDABAD. GHAZIABAD. GUWAHAT1. HYDERABAD. JAIPUR. KANPUR. LUCKNOW. NAGPUR. NALAGARH.PATNA. PUNE. RAJKOT. THIRWANANTHAP URAM.
Printed at New India Printing Press, Khurja, India
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