IS 8931 : 1933 ( Superseding IS 8934) ( Reaffirmed 2003 ) ( Py?rT !pe.bm ) Indian Standard COPPER ALLOY FANCY SINGLE TAPS, COMBINATION TAP ASSEMBLY AND STOP VALVES FOR WATER SERVICES SPECIFICATION ( First Revision ) UDC 62 1.643 *54-034-3 Q BIS 1993 BUREAU MANAK OF BHAVAN, INDIAN STANDARDS ZAFAR MARG 9 BAHADUR SHAH NEW DELHI 110002 nugust 1993 Price Group 8 Sanitary Fittings and Water Fittings Sectional Committee, CED 3 FOREWORD This Indian Standa .rd ( First Revision ) was adopted by the Bureau of Indian Standards, Fittings and Water Fittings Sectionaf Committee draft finalized by the Sanitary approved by the Civil Engineering Division Council. after the had been Pillar tap. bib taps and stop valves are extensively used as water fittings for domestic water supplies. Bib taps and stop valves and pillar taps were covered separately in IS 8931 and IS 8934 respectively. Since the functional requirements of these taps and valves are identical, the committee c!ecided to merge these two specifications. In its first revision this standard besides merging the two specifications, incorporates the following major modifications: a) b) c) d) e) Combination tap assembly has been included. that the design flexibilities as may be been elabo- Only the critical dimensions have been given so required by the manufacturer are incorporated. Material specifications for various components/parts rated. Since the commonly of taps and valves have taps of nominal size of 10, 20 and 25 mm and valves used, these have been withdrawn. performance tests have been included, of 10 and 25 mm are not necessary. Some additional as these were found taps Requirements cf screw down rising spindle bib tap.;, stop valves and pillar in IS 781 : 1984 and IS 179.5 : 1982 respectively. have been covered In the formulation of this standard, considerable assistance has been derived from EN 200 : 1989 `Sanitary tapware : General technical specifications for single taps and mixer taps ( nominal size l/2 ) PN 10 : Minimum flow pressure 0f0.05 MPa ( 0.5 bar )`, pub!ished by European Committee for standardization. However, mechanical endurance characteristics and acoustic characteristics as covered in EN 200 have not been included, as the test facilities for these tests do not exist irt the country. These are intented to be included in due coure of time. The committee responsible for the preparation of this standard is given at Annex F. 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 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. iS 8931 : 199.3 Indian Standard COPPER ALLOY FANCY SINGLE TAPS, COMBINATION TAP ASSEMBLY AND STOP VALVES FOR WATER SERVICES SPECIFICATION ( First Revision ) I SCOPE This standard lays down the requirements regarding materials, manufacture, workmanship, constructions, dimensions. finish and testing cf chromium plated cc>pper alloy non-rising spindle typt: fancy single taps, combination tap for operation assembly and Valves, suitable from 0. I MPa to 0.5 MPa pressure at maximum temperature of 65%. 2 REFERENCES The Indian Standards listed in Annex necessary adjuncts to this standard. 3 TERMINOLOGY 3.0 For the p11rpose of this stal:dard, the definitions give!1 in IS 10446 : 1983 shall apply, in addition to the following. 3.1 Combination Tap Assemblies 3.1.1 Pillar Motmting Combination The tap assembly with a vertical inlet nnd a nozzle arranged to discharge in a downward direction ( such as sir,gle hole and three hole combination tap assemblies far wash basin ) and is suitable fhc~~~bicci, I I!c parts shall be axial ~~~rallcl and cyl~nd~-ical, \vilh surface snioothiy finished \IIihlll the limit\ of dimensions specified for various componcnl~. Tllc nominal size shall he dcstgnatcd by the nominal bore of the pipe o~~tlct to which the IS 8931 : 1993 Table 1 Material for Components Parts of Single Taps, Combination ( Chise 5.1 ) Tap Assemblies and Valves Sl No. 1. Component Body, body components, inlet tubes, nozzle, bonnet and back nuts ") b) C) d) e) f-1 g) 2. Flanges ") b) C) d) e) 0 3. Spindle. glands, washer nuts, screws and pin Circlip, wire locks plate, ;I ) Material Cast brass Die cast brass* Forged brass Leaded tin bronze Brass rods Brass tubes Copper tube`s Cast brass Die cast blass* Floged brass Leaded tin bronze` Brass rods Brass sheet Brass rods ( Lxlruded or rolled ) Forged brass Phosphor bronze sheet Phosphor bronze wire Stainless steel Synthetic rubber Acrylo Nitrille butndicne rubber Ncop1er.e rubber Syflthetic butadicne rubber ( S.B.R. ) Ci:si brass Die cast brass* f:orged brass Leaded tin bronze Brass rods Zinc base alloys Plastics Grade Grade Grade Glade Indian Standard CB 2 of IS 292 : 1983 DCB2 of IS 1264 : 1989 FIB of 1s 6912 : 198.5 LTB 2 of IS 318 : 1981 Type 1 Half hard of IS 319 : 1989 1s 4J7 : 1981 Soft, a,:ncalcd IS 10773 : 1983 Grade LCB 2 of IS 292 : 1983 Grade DCB2 of IS 1264 : 1989 Glade FLB of IS 6912 : 1985 Grade LTB 2 of IS 318 : 1981 `fype 1 Half hard of IS 319 : 19X9 Grade CuZn 37 of IS 410 : 1977 Type 1 Half hard of IS 319 : 1989 Grade FLB of IS 6912 : 1985 Grade 111 HE of IS 7814 : 197.5 IS 7608 : 1987 Grade 1 of IS 4454 ( Part 4 ) : 1975 IS 9975 ( Parts 1 to 4 ) : 1981 b, 4. a) b) C) 5. 6. 0 ring Gasket and seat washer a) ") b) Cl Grade 5 of IS 7450 : 1974 Grade LCB 2 of IS 292 : 1983 Grade DCB 2 of IS 1264 : 1959 Glade FLB of IS 6912 : 1985 (;~a& LTB 2 of IS 318 : 1981 Type 1. Half hard IS 319 : 1989 IS 742 : 1981 Polyacetal, Polypropylene, ARS ( Acryfo Ni!rillc - Butadiene Styrent). Arcylics Polymethyl - Mcthacrylatec, Nylon Polymides 7. Knob. knoh components, divertor and divertor components ") b) C) J) e) f) g) *Conformity only with chemical composition to comply with. 6.6 Screw Threads 6.6.1 The inlets and outlet connection threads whether internal or externa!, shall b: a pipe thread conforming to either IS 5.54 : 1985 or IS 2643 ( Parts 1 to 3 ) : 1975. This requirement does not apply to single hole combinatio,l tap assembly. 6.6.2 The threads on the spindle shall bc trapezoidal or square conforming to IS 7008 ( P,lrts 1 to 4 ) : 1988 and 1s 4694 : 1968 respectively. The length of spindle threads shall be such that when the washerplate is resting on the seating without any washer, a length cf thread equal to not less than 50 percent of the external diameter of the threaded portion of the spindle shall be in full engagement with the internal thread of the washer plate. 2 6.7 Waterway 6.7.1 Except where otherwise spzcificd in this standard, the arca of .,vaterway throughout the body of a tap or valve shall not be less then thr area of a circle of diameter equal to the minimum bore of seating, spccificd in Tublc 2. single outlet combination tap 6.7.2 In any assembly the area r)f waterway through the individual tap shall be as :,pccified in 6.7.1 up to the junction of the two tap outlet with the The internal diameter 01` ;L combined outlet. combined outlet shall not be less than 15 mm. If the combined outlet is not circular it shall have an area of waterway not less than the area of a circle ciiametcr equal to 15 nkm. IS 8931 : 1993 6.7.3 In a combination tap assembly with divertor for bath and shower the area of waterway may be reduced below the bore specified in 6.7.1. 6.8 Flow Straightening and Aerating Device 6.13 Knob Taps may be fitted with these devices at the manufacturer's option. NOTES 1 Flow straightening of the corrugated sleeve or moulded plastic may be incorporated at the outlet within the nozzle of the tap. It may be noted that straightners usually reduce the area of waterway. 2 Flow straightening and aerating device which incorporate a multiplicity of small o&es, that is those contai.ling wire gauge or perforated plates, shall be screwed type and be easily removable for cleaning purpose. It should be noted that when aerators are fitted there is usually a reduction in flow. All knobs shall be close fit on a squared or serrated spindle. The knob may be secured by a screw or using any other efficient device, provided that the minimum cross-sectional area of attachment is not less than the equivalent square for that size of spindle. A non-metallic insert may be provided between knob and the spindle to restrict the heat transfer, when hot water is flowing. No knob shall be screwed on to the spindle directly. 7 DIMENSIONS 7.1 Minimum Thickness Except where a lesser thickness is specified, no point of body subjected to direct water pressure shall have a thickness less than 2.0 mm. However, in the case of single tap and combination tap assemblies the open outlet nozzle portion may be reduced to l-6 mm in case of castings and forging and to 0.6 mm when drawn tubes are used. 7.2 Body 7.2.1 The dimensions 6.9 Body Seats 6.9.1 The seats may be integral with the body or may be separate renewable seat rings, screwed into body and shall have serations or slots or any other not less efficient device to faciliThe area through the renewable tate renewal. seat ring shall be at least equal to a circle of diameter equal to the minimum bore of seating specified in Tab!e 2. Seat ring faces shall be finished smooth and edges shall be deburred. 6.9.2 The body shall be machined SO that when the body and seat are assembled and secured in position they are co-axial and the fdces of seats and body are parallel. 6.10 Bonnet Assembly The surface forming the body to bonnet joint shall bz machiiled smooth. The joint may be with a gasket or an `0' ring. 6.11 Gland Packing 6.11.1 Except as specified in 6.11.2 the gland or stuffing box shall be packed with a suitable asbestos gland packiog or other equally efficient packing material suitable for both cold and hot water. A suitable washer rnly also be fitted in the bottom of stuffing box but this may be omitted if the packing is in the form of a mouldcd composition packing ring. 6.11.2 When `0' rings are to be employed for the gland seal, a minimum of two rings shall be fitted in spindle or one each in spindle and washer plate unit and these shall be made They shall be capable of of synthetic rubber. being renewed. 6.12 Flanges Taps designed for mounting on to flat surfaces may have integral or separate flanges. 3 of body to bonnet connection and seat shall conform to the values specified in Table 2, read with Pig. 1. be rounded off to 7.2.2 The seat edges shall avoid cutting edges. 7.2.3 Square or lugs on the shank under the flange of pillar tap known as locating feature is an optional feature. Where provided it shall not exceed the following dimensions: Circumscribed diameter of locating feature Depth of locating feature under flange 29 mm 5mm 7.2.4 Dimensions of bodies of pillar taps and bib taps shall conform to those specified in Table 3 read with Fig. 2, and Table 4 read with Fig. 3 respectively. 7.2.5 Dimensions of bodies for stop valves including ang!e stop valves shall conform to those specifisd in Table 5, read with Fig. 4. 7.2.6 Dimensions of bodies for wall mounting shall conform to those specified in Table 6 read with Fig. 5. Dimensions of bodies of different tap types of pillar mounting combination assemblies shall conform to those specified in Table 7 read with Fig. 6 and in Table 8 read with Fig. 7. c OPTIONAL RECESSED NO, EXCEEOING 2'/2 TO A DEPTH THREADS Fan. 1 BODY TO BONNET CONNECTION ( TYPICAL DETAILS ) Table 2 Dimensions of Body to Bonnet Connection 6.9.1 anJ7.2.1 ) ( Clauses 6.7.1. All dimznsioils SI Psrficulars ( SEC Fig. 1 ) NO. in millimetre~. Dimensions for Nominal Size ____h_ _-___-_---_--, c _-_-__20 15 rM~---h---7 1. Boreof seating, 2. 3. 4. 5. 6. 4 Thickness of metal supporting Connection thread, C (_.-in____*_-_-__7 _._ 11.0 2.0 nIr1.r 12.0 15.5 2.0 *ci 3,`4 24.0 9.0 31 0 24.0 Max 16.5 28.0 seat, B *c-i 1/2 9.0 25.0 21.0 _-...---- Length of internal thread on body, D Diameter of face of body, E Face of body to face ofscating, F to IS 26.13 ( Parr 3 ) : 1975. -. *Conforming FIG. 2 BODIES FOR PILLAR TAPS ( TYPICAL DETAILS ) IS 8931 : 1993 Table 3 Dimensions of Bodies for Pillar Tap, Size 15 mm ( Clause 7.2.4 ) All dimensions ( see Fig. 2 ) in millimetres. Dimensions 5zl----w - SI No. Particulars 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Il. Bore of inlet shank, A Thread of inlet shank, B Diameter or size across flats, C Horizontal length from center of body to center outlet, D Height from flange to center outlet, E Length of thread, F Length of shank, G Diameter of flange, H Thickness of flange, J Size across Hats, K Height of flats, L The nozzle may either be manufactured to IS 2643 ( Part 3 ) : 1915. 14.5 *G l/2 B ( brass tube ). of 42 80 25 42 50 38 2 25 7 NOTE - frJ,m cast or from wrought material *Conforming NOZZLE FIG. 3 BODES FORBIB TAPS ( TYPICAL &TAILS ) IS 8931 : 1993 Table 4 Dimensions of Bodies for BIB Tap, Size 15 mm ( Clause 7.2.4 ) All dimensions Si No. in millimetres. r-------n4in 11 80 150 20 be manuFactwed 3 ) from cast or from c roug!lt material Dimensions h_______~ MU *G l/2 B/R I/2* ( brass tub: ). I_e>:end SYP I'ig. 3 ) A I: c I> F r.0271~ may ( 1. 2. 3. 4. 5. NOTE 111~ cithcl *C`onforming to IS 2643 ( Part : 1975 or IS 554 : 1985. WITH STOP VALVE INTERNAL THREAD ANGLE STOP VALV STOP VALVE WITH EXTERNAI. THREAG FIG. 4 !~IIIIES FOR CONCEALED S T3P VALVE Srop VALVFS AND ANGLE Sror~ VALVES ( TYPICAL DETAILS ) of Bodies for Stop Valve and Angle Stop Valve ( Chtsc All dimrrrsions Table 5 Dimensions 7.2.5 ) in millimctres. Dimensions for Nominal Size SI No. Legend ( sw Irig. 4 ) ~-.--__-_--_ 15 ___.-- ~------_-~-_-__7 20 -_.-h_-__.`~ _.&fir1 .\lrr \ *<; 3 1 II\? 3,4* `(i 3'3H II 3 `I* IO.5 12 - h OOSE FLANGE ,/ /' -,'I' I tY NO2 ZL E E 1 L----l LOOSE FLANGE FIG 5 130111~~ FOR WALI. MOUNTING COMBINATION TAP ASSEMBLY ( TYPICAL Kh'AILS ) Table 6 Dimensions of Bodies for Wall Mounting Combination ( Clause 7.2.6 ) All dimensions in m~llinlctws. Tap Assembly, Size 15 mm SI No. Particulars ( see Fig. 5 ) Thrcad of ivlet shank, 11 Lergth of shank, B Adjllstment range of S-union, C Diameter of range. D Distance betMc:n ccntres of inlets, E Lcllgth fIOJ~1 flargc to cciltre of spoIIt, I; Lwgrh from flange to ccutrc of zpout, G 711~ ~;oz;llc may ciihcr be mnnufacturcci Dimensions ~~_~~__-~~~~~ h4in MflX 1. 2. 3. 4. 5. *Ci l/2 B 25 5 so - 6. 7. NOR! 148 13s 200 - flon1 cast 01 fl(>m wi~~ght nl:tel ial ( hr;is\ luh ). *C`onforming to iS 2643 \ Part 3 ) : 1975 LOOSE FLANGE PERMITTED c INLET TUBES Mr 1 FIG. 6 Table 7 BODIESFOR PILLAR MOUNTING COMBINATION TAP ASSEMBLY ( TYPICAL DETAILS ) Dimensions of Bodies for Pillar Mounting Combination Tap Assembly, ( Clause 7.2.6 ) ( All dimensions in millimetres. ) Size 15 mm SI No. Particulars ( we Fig. 6 ) r-----_-_A______, Dimensions Mifr MUX 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Dimension 01 b'ase from ccntrc of body, A Diameter of shank, II Outer dimension, C Smallest dimension of Kinge, D Hori&ntal length from c:ntrc of body to ccnlre of outlet, E Height from flange to ccntrc of outlet, I' ~xngth of threaded shank, LI Deplh of iicxagol-I., ff Dinrvetcr of flar;gz, .I Length of connection, K Mean outside diameter of copper tube, L. Mean thickness of tube, hl NOTES 1 The nwrlc may cithcr be nianufacturcd 2 The inlet tubes made of soft annealed from cast or from copper tubes. 21 42 w) 25 40 7 31 29 33.5 _124 .I. - 42 350 9.5 0.6 material .- wrOught ( brars tube )" PERMITTED FIG. Table 7 8 BOIXES FOR PILLAR MOUNTING Dimension COMDINATION TAP ASSEMBLY ( TYPICAL DETAILS ) of Bodies for Pillar Mounting ( All dimensions Combination Tap Assembly, Size 15 mm ( CIatrse 7.2.6 ) in villimetrec r---_ ) Dimensions h---__-T SI No. Particulars ( we Fig. 7 ) Mbr 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Bore Thread Length Height Diamctcr Smallest Diamctcr Distance of inlet shank, shank, A B shank, C ), D 8 5 42 42 Ii to 195 90 25 9.5 0.6 from cast or from threaded E of flange, G centres of inlet. center of body of outlet, tube, MUX 14.5 G l/2 R* of inlet of cxtcrnal for tightening of shank, dimension of flange, between 30 29 62 210 125 wrought material ( brass tub). ( adjustable F Horizontal length from centrc of outlet, J IIcight Mean Mean from flange to cenire K L outsi:l: diameter o! copper thickness of tube, M The nozzle may either to IS 2643 NOTE _ *Conforming be man.ufacturcd ( Part 3 ) : 1975. WASHER PLAT - 1 SEAT WAStiER--/ II---U F----+---i Flc. 8 BONNET ASSEMBLY ( TYPICAL DETAILS ) Table 9 Dimensions of Bonnet Assembly ( Cluuse 7.3.2 ) SI No. ( All dimensi0r.s in millimetres ) Dimensions for Nominal Size Particulars ( see Fig. 8 ) r--_--4-15 25 2.5 3.7 31 2-s 1. 2. 3. 4. 5. 6. I. 8. 9. 10. 11. 12. 13. Diameter, A ( Min ) Thickness, R ( Mitt ) Diameter of seat washer, C ( Min ) Projection from edge of washer plate, D ( Min ) ( applicable for shrouded type oiily ) Thickness of seat washer, E ( Min ) Length of closing thurst collar of bonnet, F( Min ) Thread, G Length, II ( MUX ) Diameter of spindle, J ( Mire ) Diameter of thur.st collor, K (Mire ) Thickress of thurst collar, L ( Min ) Ccrc diameter of spindle actuating thread, M ( Mitt ) Outside diameter of washer plate, N (Max ) *Conforming to 1s 2643 ( Part 3 ) : 1975. 15 6 20.6 1 4 2.0 1 4 2.5 *G l/2 B 9 7 11.8 *G 3/J B 9 9 13.8 1.5 6.0 18.5 1.5 8-O 24 IS 8931 : 1993 7.3 Bonnet Assembly 7-3-1 Spindle, bonnet, washer plate and other parts shall be machined true, so that when assembled, the parts shall be axial, parallel and cylindrical with surface smoothly finished. 7.3.2 The dimensions of bonnet assembly shall conform to those specified in Table 9, read with Fig. 8. 7.3.3 Washer Plate 7.3.3.1 The washet plate shall be shrouded flat type, made from one piece and shall machined all over. or be nickle chromium plated complying grade No. 2 of IS 8376 : 1988. with service 8.4 The knobs and knob components of zinc base alloy shall be nickle chromium plated complying with service grade No. 2 of IS 4828 : 1983. 9 TESTING 9.1 Material Test Material tests required shall be those given in corresponding material specifications referred in Table 1. The material shall be either certified by the suppliers with regard to their compliance to specifications laid down for them and/or test shall be made to ascertain their compliance witn the relevant specifications before use. 9.2 Performance Test All taps and valves shall be capable of complying with the tests specified in 9.2.1 to 9.2.4. The test specified are laboratory tests and not quality control tests during production. 9.2.1 Water Tightness Characteristic 9.2.1.1 This test consists of checking under cold water pressure or under air pressure the watertightness of bonnet assembly on seat, tap and valve upstream, taps and valve downstream and bath/shower divertors whether manual or automatically operated. 9.2.1.2 The test under cold water pressure and air pressure are considered to be equivalent. The choice between one or the other method should be agreed between purchaser and test laboratory. 9.2.1.3 Throughout the duration of either water test of air test under water, there shall be no leakage of water or escape of air bubbles respectively, through the walls of the body, the bonnet and the divertor assembly. 9.2.1.4 The test equipment, duration and procedure as specified in Annex B shall be followed. 9.2.2 pressure Resistance Characteristic 9.2.2.1 7.3.3.2 The part of washer plate that prevents turning shall be either two flats, a square, a hexagon or any other shape that prevents turning. 7.3.3.3 The seat washer shall be inserted in washer housing. The connection between the seat washer and its housing shall be ensured by a screw, a nut or any other means that ensures the firm seating cf the washer in its place. 7.3.3.4 The minimum lift of washer plate with washer in position shall be 3.5 mm and 5.0 mm respectively for 15 and 20 nominal bore taps and valves. 7.3.4 The seat washer shall be suitable for heat resistant applications Basic polymer ( nitirile and SBR or neoprene ) shall be used in their manufacture. 8 FINISH 8.1 The significant surfaces of taps, combination tap assembly and stop valves shall be nickle-chromium plated. However, the body of concealed stop valve and side stop valve of pillar mounting combination tap assembly may be polished bright or may have an unpolished surface, as `Cast' finish. 8.1.1 Dejinition of Signi$cant Surfaces Significant surfaces are all parts of the article ( taps, valves and combination tap assembly ) covered or to be covered by the coating and for which the coating is essential for serviceability and/or appearance of the fitted article. For example, internal sufaces of hollow parts such as cross pieces, caps, knobs are not deemed significant. taps and valves chromium plated complying No. 2 of IS 4827 : 1983. 8.2 The shall be nicklewith service grade This test consists of revealing mation in the tap and valve that under the action of cold water at The test shall be high pressure. LIpstream and downstream of the valves. any deformay result a relatively carried out taps and 8.3 The knobs and knob components of plastic material may be used in as moulded finish, or 11 9.2.2.2 Criteria for conformity shall be that no permanent deformation in the part of the taps and valves situated upstream or downstream shall be produced. IS 8931 : 1993 9.2.2.3 The test cquip:nent, p:occdurc and duration as specified in Annex C shall be followed. 9.2.3 Hydraulic Characteristics ( Flow Ru!e ) 9.2.4.3 The Lap with its operating mechanism ( bonnet assembly ) shall not be supplied with water during the test. 9.2.4.4 Throughout the duration of test and at the end of test there shall be no permanent deformation or loosing of any part of the tap and valve. 10 SAMPLING CONFORMITY AND CRITERIA FOR 9.2.3.1 Tllis test is pcrforn-ied to dcterminc the value of the flow rate corresp:>nding to rcftrc!icC pressure equal to 0.3 MPa. The measurement is carried out with taps and valves fully opan. If it if fitib:d with flo\+ straightening or aerating device the same may bc removed for the purpose. 9.2.3.2 than: The value of flow rate shall not be less single The sampling procedure criteria for conformity Annex E. 11 MARKING to be adopted and shall be as given in a) 12 l/mitt and f0r 15 mm nominal size comhinntion tap and valve for 20 mm nominal size. b) 23 l/min 9.2.3.3 The test dure as specified 9.2.4 9.2.4.1 Adechanical 11.1 Each pillar tap, bib tap, combination tap assembly, stop valve alld angIe stop v,llvc shall be legibly marked with the followiitg information: circuit, apparatus and procein Annex D shall be followed. Strength Characteristics a) b) Manufilcturer's name or trade-mark. This test is performed to verify the torsional strength of operating mechanism ( honnet assembly ) to a torque of 6 Nm, in both opening and closing positions. c) Letter `H' or `C' or alternatively fire red or blue colour for taps meant for hot water or cold water applications. In the case cf combination tap assembly, the hot water shall be on the left and cold water on the right. Direction of flow in case of atop valves. shall be tap may 9.2.4.2 The required tcrque of 6 Nm shall be applied and maintained for a period of 5 minutes either with a torque wrench, having an accuracy of 10 percent. fitted to operating metnber or a lever arm and device for measuIt shall be assured that ring the force applied. shear force does not affect the measurement. size of taps and valves 11.1.1 Nominal given on the cat-ton/packing. 11.2 Each pillar tap, bib tap, combination assembly, stop valve and angle stop valve also be marked with the Standard Mat-h. ANNEX A ( Clmse 2.1 ) 1.1% IS No. 292 : 1953 OF REFERRED brass tin INDIAN STANDARDS Title Title IS No. Specification f0r leaded ingots and castings Specilicaticln b:.onze ingots for leaded and castings 554 : 198.5 Dimensions for pipe where pressure-right are made on threads Specification for alloys die casting /inc t hrcads joinls base 31s : 1981 319 : 1989 742 : 1981 7sl . 1984 ' Specification for free cutting leaded bra\a bars, rods and sections Specificatiotl for brass tube\ for gcnct-al purpose Specification for cold rolled brass k,heets, strip and f!lil 12 407 : 1989 410 : 1977 Specification for cast cc)ppcr alloys screw down bib tap, and stop valves for water services Specification for brass gravity die cast inos ( ingot5 and i` cattings ) 1264 : 1989 IS 8931 : 1993 IS No. 1795 : 1982 2643 : 1975 4454 ( Part Title Specification for pillar for aater supply purpose Dimensions for fastening for pipe purpose taps IS No. Title diameter combinations revision ) (first threads 7008 ( Part 3 ) : 1988 7008 ( Part 4 ) : 1988 7450 : 1974 4 ) : 1975 Steel wires for cold formed : Part 4 Stainless springs spring steel wire for normal ccrrosion resistance ( first revision ) Basic dimension threads of square IS0 metric trapezoidal screw threads : Part 3 Basic dimensions (Jirst revisim ) IS0 metric trapezoidal screw threads : Part 4 Tolerances (first revision ) Specification for vulcanized butadiene rubbct styrcne ( SBR ) based compounds Specification for phosphor bronze nire ( for general cngineeering purposes ) Specification bronze sheets for phosphor an<1 strip of on pur- 4694 : 1968 4827 : 1983 4828 : 1983 Electroplated coatings of nickle and chromium on copper and copper alloys Electroplated coatings of copper nicklc and chromium on zinc alloys Methods ling for random samp- 76% : 1975 7814: 1985 4905 : 1986 5192 : 1975 8376 : 1988 Specification for vulcanized natural rubber based compounds Specification for copper and copper alloys forging stock and forgings IS0 metric trapezoidal screw threads : Part 1 Basic profile and maximum material profile (first revision ) ISO screw metric threads trapezoidal : Part 2 Pitch Electroplated coatings nickle and chromium plastics for decorative post 9844 : 1981 6912 : 1985 7008 ( Part Method of testing corrosion resistance of electroplated and anodized aluminum coatings by neutral salt sp:xy test Specification for `0' rings to Glossary of terms relating hater supply and sanitation Copper tubes for refrigeration purostZs 1 ) : 1988 9975 : 1981 10446 : 1983 10773 : 1983 7008 ( Part 2) : 1988 ANNEX B ( Clause 9.2.1.4 ) WATERTIGHTNESS R-l GENERAL CHARACTERISTICS B-2.2 For Air Test Under Water Tank fi!led \cith water and its acccssorics. Pneumatic circuit that can deliver the required prcssurc and mainlain it f Ir !he duraticln of the test. B-2.3 For Automatic Divertor This annex specifies test methods to verify the watertightness of the complete taps and valves specimen. B-2 TEST EQUIPMENT Test B-2.1 For Water The hydraulic test circuit shall be capable of producing the static and dynamic prc\sures required and maintaining them for 1.11~duration of the test. 13 A tlow rate regulator having a nominal flow of 15.0 ( niinimum 13.5) iitrc per minu!e at ;i dynamic pt-e\\urc of 0.3 WPa. IS sp31 : 1993 B-2.4 Test Duration The periods given are minimum periods. B-3 PROCEDURE FOR CHECKING THE WATERTIGHTNESS OF THE BONNET ASSEMBLY ON THE SEAT, AND `CHE WATERTTGHTNESS OF THE TAPS AND VALVES UPSTREAM B-3.1 Water Test i> Connect B-4.2 Air Test Under Water i) Connect . circuit. the tap/valve specimen to the ii) With the outlet orifice closed. iii) Immerse the tap/valve specimen in water contained in the tank. iv) Apply an air pressure of 0.2 MPa for 20 s. the tap/valve test circuit. specimen to the ii) With the outlet orifice open generally turned downwards, close the seat ( bonnet assembly ) using a torque of 1.5 Nm. iii) Apply water pressure of I.6 MPa for 60 s. of the spinNOTE - When the watertightness dle is ensured by a stuffing box, the packing gland is loosened. v) In addition, for taps and valves where the watertightness of the spindle is ensured by one or more O-rings, apply an air pressure of 0.02 MPa for 20 s. vi) In the latter case, begin by applying O-2 MPa gradually reducing down to the test pressure of 0.02 MPa. B-5 PROCEDURE FOR CHECKING THE WATERTIGHTNESS OF MANUALLY OPERATED DIVERTERS B-5.1 Water Test the tap in its normal position of i> Connect use, to the test circuit. ii) Put the diverter in the bath position, the bath outlet being artifically closed and shower outlet being open and generally turned downwards. iii) Apply a static water pressure of 0.4 MPa for 60 s. Check that watertightness is maintained on the shower side. iv) In addition, when the watertightness of diverter is ensured by one or more 0 rings, apply a static water pressure of 0.02 MPa for 20 s. In the latter case, begin by the highest pressure, then applying gradually reducing down to the lowest pressure of 0.02 MPa. Check that is maintained on the watertightness shower side. v) Put the and ally the diverter in the shower position, shower outlet being artificially closed the bath outlet being open the generturned downards. B-3.2 Air Test Under Water i) Connect the tap/valve test circuit. specimen to the ii) With the outlet orifice open and generally turned upwards, close the seat ( bonnet assembly ) using a torque of 1.5 Nm. iii) Completely immerse the tap/valve men in water contained in tank. speci- iv) Apply an air pressure of 0.6 MPa to the tap/valve specimen for 20 s. NOTE - If the watertightness is ensured by a stuffing box, the is loosened. of the spindle packing gland B-4 PROCEDURE FOR CHECKING THE WATERTlGHTNESS OF THE TAPS AND VALVES DOWNSTREAM B-4.1 Water Test i) Connect the tap/valve test circuit. specimen to the ii) With the outlet orifice closed and generally turned downwards? open the seat ( bonnet assembly ). iii) Apply to the tap/valve specimen, pressure of 0.4 MPa for 60 S. a water vi) Apply a static water pressure of 0.4 MPa for 60 s. Check that watertightness is maintained on the bath side. of the vii) In addition, if the watertightness diverter is ensured by one or more 0 apply a static water pressure of F8vIPa for 20 s. In the latter case, begin by applying the highest pressure, then gradually reducing down to the lowest pressure of 0.02 MPa. Check that watertightness is maintained on the bath side. iv) In addition, for tap and valves where the watertightness of the spindle is ensured by one or more O-rings, apply a water pressure of 0802 MPa for 60 s. v) ln the latter case, begin by applying O-4 MPa gradually reducing down to the test pressure of 0.02 MPa. 14 IS 8931:1993 B-5.2 Air Test Under Water i) Connect the tap in its normal of use to the test circuit. positions ii) Place the diverter in the bath position, with the bath outlet being artificially closed and shower 0utlet being open generally turned upwards. iii) Immerse the in the tank. tap ir. the water contained 0.02 MPa for 20 s. In the latter case begin by applying the highest prcssurc then gradually reducing down to the lowest pressure of 0.02 MPa. Check that watertightnrss is mnin:aincd 011 the bath side. B-5.3 Procedure for Checking of Automatic Diverters ( The test shall be carried the Watertightness out with water only. ) iv) Apply a static air pressure of 0.2 MPa for 20 s. Check that watertightness is maintained on the bhowcr side. v) In addition, if the watertightness of the divertor is ensured by one or more 0 I ings, apply a static air pressure cf 0.02 MPa for 20 s. In the latter case begin by applying the highest pressure of 0.02 MPa. Cheek that watertightncss is maintaincc! on the shower side. vi) Put the divertor in the shower position with the shower side outlet being artificially closed and the bath side outlet generally turned and Opelid being upwards. vii) Immerse the in the tank. tap in the water contained i) Conlieci the tap, in its normal position of LLC~. to the test circuit with outlet orifices open and geneI-ally tul~nz(! Jownwards. Connect the flow regulator ( SEP B-2.3 ), to the shower outlet. ii) Put the diverter in the bat.h position, and apply a dynamic water pressure of 0 4 Ml% for 60 s. Check that wztertightness is maintained on the shower side. iii) Put the diverter in sho\ver position, check that watcrtightncss is maintained on the bath side. iv) With tions, the diverter still in shower posireduce the dynamic p:-esswe to 0.05 MPa. Check that the diverter has not disengaged. Maintain this pressure for 60 s and cheek [hat wntcrtightness is maintained on the bath side. viii) air pressure of 0.2 MPa Apply a static for 2O s. Check that watertightness is maintai~icd on the bath side. 111 addition, V) check that th,_ c!ivcrtcl Stnp the water, returns to the bath positions. ix) divcrtor 0 rings, if the watertightness of the is ensured by 0ne or more apply a static air pressure of vi) Rs-apply the dynamic p:c;;urz of 0.05 MPa fur 60 s. Cheek Ihat wate;tightness is maintained on the shower side. I5 IS 8931 : 1993 ANNEX PRESSURE RESISTANCE C CHARACTERISTICS ( Clause 9.2.2.3 ) C-l GENERAL This annex specifies the test method for checking the mechanical behaviour with cold water of the body of the taps and valves and lays down rhe test criteria. C-2 TEST EQUIPMENT Use a hydraulic test circuit capable of proand dynamic pressures the static ducing required and of mail?taining them for the test duration. C-3 PROCEDURE FOR CHECKING OF MECHANICAL BEHAVIOUR UPSTREAM SEAT ( BONNET ASSEMBLY ) IN SHUT POSITION Apply MPa. for 60 s a static water pressure of 2.5 C-4 PROCEDURE FOR CHECKING MECHANICAL BEHAVIOUR DOWNSTREAM, SEAT ( BONNET ASSEMBLY ) IN OPEN POSITION THE Apply for 60 s a dynamic water pressure of 0.4 MPa, this pressure being measured at the junction of the tap and the pipe. Carry out the test on the tap and valve as supplied. For taps containing a removable aerating device in the nozzle carry out an additional test with the device removed. ANNEX HYDRAULIC D-l GENERAL This annex specifies the test method which enables the flow rate of single and combination taps and velve together with their standard accessories to be measured for a given pressure. D-2 APPARATUS The apparatus test circuit. ( see Fig. 9 ) D ( Clause 9.2.3.3 ) CHARACTERISTICS 0 a straight portion of tube, having a minimum internal diameter 13 mm and 19 mm for 15 and 20 nominal size of taps and valve respectively, with a pressure tapping, as shown in Fig. IO. nut or socket ii) consists of a supply circuit and a iii) a tap and valve connecting of suitable size; D-2.1 The supply circuit assembly consists of : a) a device ( A ) enabling the required ssure to be achieved; pre- a pressure circuit, connected to the pressure take off tee and to the pressure measuring device. NOTE - The connection between the pressure circuit and measuring apparatus is situated. a) at the connection level, for all taps ( Fig. 10a and 1Oc ) except for tap with combined visible bodies and all mixers with copper inlet pipe of 250 mm minimum length ( Fig. lob ). b) 200mm above types of tap. the connection level for all b) piping ( B ) with a cross section such that the test circuit without the tap and valve to be tested, enables a flow rate of 50 percent greater than the flow rate to be measured to be achieved. c) a device ( C ) to measure the flow rate. NOTE - This device may also be placed downstream of the test circuit, provided it is separate from the test circuit. Example of the fitting of the tap and valve to the test circuit are shown in Fig. 10. D-3.1 Pipes The pipes shall be of metal and their internal surface shall be smooth. D-3 TEST CIRCUIT ( see Fig. 10 ) The circuit shown in Fig. 10 is suitable whatever the type of the tap and valve to be tested. It consists of : 16 IS 8931 : 1993 JJ$+_______Hj ,______?_ SUPKY ClRCUIT j, TESTCIRCUIT /I-FIG. 9 SUPPLY 61 `_ \1 TEST CIRCUIT /lX AND TEST (hXJIT : ! FIG. 10 D-3.2 Pressure Take off Tee mST CIRCUIT D-4.2.5 D-4.2.6 dynamic Open the valve to its maximum. Supply the test circuit pressure to 0.3 MPu. and adjust the `The pressure take off tees shall b,: made of brass and machined to the dimension as specified in Table 10. D-4 TEST D-4.1 CONDITIONS of the Measurements Precision D-4.2.7 When a stable, continuous few has been established, measure the corresponding flow rate. D-4.2.8 For greater accuracy, procedure is rccommcndcd: the following The precicion c:f the device for measuring the flow rates and pressures shall be & 2 percent. D-4,2 Procedure to be tested orito D-4.2.1 Fit the tap and valve the test circuit. D-4.2.2 For combination the test shall he carried inlets separately. taps out on with two inlets, each of these carry our several measurements of the flow rate ai different v:~lucs of prcssurc ( for example between 0. I MPa and 0.5 MI's ). using logarithmic coorclinatcs, plot the curve of the flow rate ( Q ) ;I!, a function of the piescurc ( P ); determine 0li this curve fl<)w rate correspondiny of 0.3 MPiI. D-S CALIBRATION It i$ recommended that the mea\uring appllancc< and the test circuit be c;llihr-aleil at rcgulai intcrvnl\. Ihe value of the to the prcssul-e D-4.2.3 For combination tap with combined visible body, reduce, if necessary the 1el:gth of the supply tubes to a value of 250 mm. For the tap., and valves which be connected (directly to the test use iritermctfiatc COIlilCCtill~ connector, which have minimum hcnd Iohs. D-4.2.4 cannot circuit device: 17 IS 8931 : 1993 All dimensions FIG. 11 in millimetres. of Pressure Take Off Tee in mlllimetres. ) Width Across Flats 32 ;7 Bolts r--_~__7 NumSix bcr : MSXlh M4x 16 DIMENSIONS OF PRESSURE TAKE OFF `IEE Table 10 Nominal Size :; Thread -_---Size A'RCDEFCHJK G 3/4 I/2 13 19 34 41 Dimensions ( All dimensmns ______ Legends ( ser Fig. I I --_-A________-___-_~-, ) L MN f: 15 17 0 0.5 0.6 55 62 26 21 35 31 43 50 59 66 27 29 lo" 12.4 12.5 "Conforming to IS 2643 ( PJrt 3 ) : 197.5. ANNEX E ( Clfltrse 10 ) E-l SCALE E-l.1 Cot SAMPLING OF SAMPLING AND CRITERIA FOR CONFORMITY selection, procedures given in JS 4905 : 1968 may be followed. E-2 NIJMBER OF TESTS AND CRITERIA FOR CONFORMITY E-2.1 All the taps and valves selected according to E-l.3 shall be examined for material ( 5.5.1 ), workmarrship and construction manufacture, ( 6 ), ciimensions ( 7), and finish ( 8). A sample item failing to satisfy one or more of these requirements shall he considered as defective. E-2.1.1 The lot shall be consictcled to have satixficd thcsc requirements if the nunlhcr of defective itcn;s found in the san~plc is less than or Equal to the corresponding acccptancc number given in co1 3 of Tsble Il. E-2.2 The lot having been fount! satisfactory according to E-2.1 shall be further tcstcci for performance test specified under 9.2. For thi, purpose, as sub-sample of taps and Valves given in co1 4 of Table 1 I shall he take!; and subjected The number of items J.cquireci to these tests. in the sub-sample may be taken from those exam i II ed and found sat isfactor) alre;tdv accorciing to E-2.1. E-2.2.1 The lot shall be consiticred to have satibfLzd the requirement\ for these tchta rf none of tap and valve\ in the sub-sample f:liIs irl any of these tests. 111any consig:!mcnt, all the items ( Pillar taps bib taps, combination tap assembly, stop valves and atlgle stop valves ) made of the same material, of the same nominal size and from the same batch of manufacture shall be grouped together to constitute a lot. E-l.2 For ascertaining the conformity of material in the lot to the requirements of this specisample shall be tested from each lot fication, separately. E-l.3 The number of items to he selecttd from the lot shall depend on the size of the lot and shall be accord in& to Table 11. Table 11 No. of Taps and Valves io the Lot (1) up to 150 151 to 300 301 to 500 501 to 1 000 1 001 to 3 oco 3 001 and above Scale of Sampling for Coriformity Sample Size and Criteria SubSample (4) S 13 13 20 32 32 ( 2; :: :: 80 Acccplancr: Number (3) 0 0 : : E-1.3.1 These from the lot, items shall he selected at rarldom in order to ensure randomness of IS 8931 : 1993 ANNEX COMMITTEE Sanitary C/airman SIJRI F ( foreword ) COMPOSlTION Fittings Sectional Committee, CED 3 Undertaking, New Appliances and Water Representing Delhi Water Supply and Sewage Disposal Delhi to S. PRAKASH Menlbcr SHRI P. K. JAIN I Akwrate Shri S. Prakash ) ADVISOR ( PHE ) Dr ADVISFR ( PHE ) ( AIternatc ) ) SHRI J. K. SIJIU ARIJN AGGARWAL SHRI SANJAY AGCZARWALL ( KANTI BISWAS Central Public Health and Environmental Engineering tion, New Delhi M/s Govardhan Das P. A. ( Calcutta), Calcutta Natio;o~~;ironmentnl Engineering Research Institute Orgniza- Aftmate (CSIR). i)R T. K. DAN SHRI G. DHAMODARAM SHRI V. GOPAL ( Altcvwatr Central Glass and Ceramic Research Insitute E.I.D. Parry ( India ) Limited, Madras (CSIR), Calcutta ) Municipal Ahcrnatc Corporation Test House, Shipyard of Greater Calcutta Ltd, Visakhapatnam Trivandrum New Delhi ( India ), Calcutta New Delhi Bombay, Bombay HYDRAULIC ENGINEER DY HYDRAULIC ENGINEER ( SHRI D. K. KANUNGO SHRI R. KAPOOR ( I National Alternate ) Hindustan ) Kerala Water Authority, Buildings SHRI K. LAKSHMI NARAYAnA SHRI A. SHARIFF ( Alternntc MANAGING DIRECTOR CHIEF ENGINEER ( PB & G ) ( A[fermte SHRI M. M. MISTRY SHRI A. G. DHONGADE ( Altfrtlnte SHRI S. K. NEOC~I SHRI A. K. SFNGUPTA ( SIIRI Y. N. RAO MAJ P. NAC; ( ) ) National lnstitution Organization, of Public Health Branch, Limited, Works, Engineers Alterwtr ) Engineer-in-Chief's Army Headquarters, Pune Jalandhar Kirloskar Brothers Altc~rmte) .-lhrrrafc ) Leader Engineering Altcrnutc ) Railway Board ( Ministry of Railways ), New Delhi Directorate General of Supplies and Disposals, New Delhi Hindustan Sanitaryware and lndustrics Limited, Bahadurgarh Central Altermte ) Glass Fibre Technology Ccntre ( R and D ) CEAT Limited, Secunderabad Uttar Pradesh Jal Nigam, Lucknow Director General, HIS ( E.x-ofliciu Mmbcr ) Building Research Instit utc, Roorkee SFJRIR. H. ROTITHOR SHRI S. D. JOSHI ( S~JRI D. K. SEIJGAL SIJR I B. B. SIKKA ( SENIOR CIVIL ENGINEER ( WATT-R SUPPLY ) SIIRI R. C. SHRI SFJARMA R. K. SOMANY SI~IuPTA ( ff/tcf?late StlRI S. PRAKASH SHRI RAKI-SKI RATHCXJR Sl~Rl 0. P. WADIIWA ( RFPRFSI'NTATIVE S~l