1、Designation: C1540 18Standard Specification forHeavy-Duty Shielded Couplings Joining Hubless Cast IronSoil Pipe and Fittings1This standard is issued under the fixed designation C1540; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision,
2、 the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the evaluating of the perfor-mance of heavy-duty shielded couplings to join hub
3、less castiron soil pipe and fittings.1.2 Couplings covered by this standard shall have nominaldimensions as found in Table 1 and Fig. 1.1.3 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided f
4、or information onlyand are not considered standard.1.4 The following precautionary caveat pertains only to thetest method portion, Section 7, of this specification. Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the us
5、erof this standard to establish appropriate safety, health, andenvironmental practices and determine the applicability ofregulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the
6、Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A240/A240M Specification for Chromium and Chromium-Nickel Stainless Steel Pla
7、te, Sheet, and Strip for PressureVessels and for General ApplicationsA493 Specification for Stainless Steel Wire and Wire Rodsfor Cold Heading and Cold ForgingA644 Terminology Relating to Iron CastingsA888 Specification for Hubless Cast Iron Soil Pipe andFittings for Sanitary and Storm Drain, Waste,
8、 and VentPiping ApplicationsC564 Specification for Rubber Gaskets for Cast Iron SoilPipe and FittingsD3677 Test Methods for RubberIdentification by InfraredSpectrophotometry2.2 CISPI Standards:3CISPI-301 Specification for Hubless Cast Iron Soil Pipe andFittings for Sanitary and Storm Drain, Waste an
9、d VentPiping ApplicationsCISPI-310 Specification for Couplings for Use in Connec-tion With Hubless Cast Iron Soil Pipe and Fittings forSanitary and Storm Drain, Waste and Vent Piping Appli-cations2.3 Factory Mutual Standard:4FM 1680 Approval Standard for Couplings Used in HublessCast Iron Systems fo
10、r Drain, Waste or Vent, Sewer,Rainwater or Storm Drain Systems Above and BelowGround, Industrial/Commercial and Residential3. Terminology3.1 Definitions of the following terms used in this specifi-cation are found in Terminology A644.3.2 Definitions of Terms Specific to This Standard:3.2.1 center st
11、op, nan integral part of the gasket centeredon the axial length of the gasket, intended to limit the insertiondepth of the pipe to be coupled.3.2.2 clamp assembly, nthat portion of the coupling ex-cluding the gasket.3.2.3 coupling, nthe complete assembly.3.2.4 coupling manufacturer, nthe entity that
12、 assemblesthe gasket with the clamp and shield assembly.3.2.5 fitting, nparts of a pipeline other than straight pipes,valves, or couplings.3.2.6 gasket, nthe elastomeric portion of the coupling.1This specification is under the jurisdiction of ASTM Committee A04 on IronCastings and is the direct resp
13、onsibility of Subcommittee A04.75 on Gaskets andCoupling for Plumbing and Sewer Piping.Current edition approved Feb. 1, 2018. Published February 2018. Originallyapproved in 2002. Last previous edition approved in 2015 as C1540 15. DOI:10.1520/C1540-18.2For referenced ASTM standards, visit the ASTM w
14、ebsite, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Cast Iron Soil Pipe Institute (CISPI), 2401 Fieldcrest Dr.,Mundelein, IL 60060, http:/www.cis
15、pi.org.4Available from FM Approvals, P.O. Box 9102, Norwood, MA 02062. http:/.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standar
16、dization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.13.2.7 gasket manufacturer, nthe entity that molds thegaskets inserted into the couplings co
17、vered by this standardspecification.3.2.8 heavy-duty coupling, na shielded coupling that hasdimensions detailed in Table 1 and Fig. 1.3.2.9 joint, nthe point of assembly consisting of thecoupling and the joined pipes or fittings, or both.3.2.10 shield, nan external metallic protective devicedesigned
18、 to protect the sealing gasket from external elementsthat could cause failure of the sealing assembly.4. Materials and Manufacture4.1 Physical and chemical properties of gaskets shall com-ply with Specification C564 in accordance with Column “C” ofTable 1 of that document. Typical dimensions shall b
19、e inaccordance with Fig. 2 and Table 2.4.2 Clamp assembly screws or bolts shall not have screw-driver slots.4.3 All stainless steel shall meet the physical requirementsof Specification A240/A240M.5. Elastomeric Gasket Requirements5.1 The gasket shall be tested in accordance with TestMethods D3677 an
20、d be manufactured from a properly vulca-nized virgin compound where the primary elastomer is poly-chloroprene (neoprene).5.2 The elastomeric gasket shall consist of a one-piececonstruction conforming to the physical requirements of Speci-fication C564. The gaskets shall be tested by the gasketmanufa
21、cturer for compliance to Specification C564 a minimumof 24 h after production, but not longer than 72 h after time ofproduction. These tests shall include hardness, elongation andtensile strength, tear strength, and compression set. Heat,aging, water absorption, ozone resistance, and oil immersionte
22、sts shall be conducted annually or when a formulationchanges, or a supplier changes, whichever occurs first.5.2.1 The elastomeric gasket shall have an inside center stopthat does not create an enlargement chamber or recess with aledge, shoulder, or reduction of pipe area or offer an obstruc-tion to
23、flow.5.2.2 The elastomeric gasket shall be free of defects thataffect the use and serviceability.6. Clamp Assembly Requirements6.1 The clamp assembly shall be made of material conform-ing to the requirements as outlined in Sections 4 and 6, Table3, and Fig. 3.6.1.1 All metallic parts shall be of 300
24、 series stainless steeland shall conform to the requirements of Specification A240/A240M. All metallic parts made from round stock shall be of300 series stainless steel and shall conform to the requirementsof Specification A493 (excluding copper-bearing alloys).6.1.2 Clamp assemblies shall be tested
25、 to withstand no lessthan 125 % of the manufacturers stated installation torquewithout visible signs of failure. The clamp assembly shall betested over a steel mandrel of the appropriate diameter andtorqued as required. These tests shall be performed on ran-domly selected samples during the course o
26、f production asneeded, but not less than one clamp per shift per size duringclamp assembly production.TABLE 1Nominal Pipe Size Nominal Coupling Width112 to 4 in. (38 to 100 mm) 3 in. (76 mm)5 to 10 in. (127 to 254 mm) 4 in. (100 mm)12 to 15 in. (305 to 381 mm) 512 in. (140 mm)Dimensions1 1/2 in. 2 i
27、n. 3 in. 4 in. 5 in. 6 in. 8 in. 10in.12 in. 15in.A 1.500 1.500 1.500 1.500 2.000 2.000 2.000 2.000 2.750 2.750B 3.000 3.000 3.000 3.000 4.000 4.000 4.000 4.000 5.500 5.500D1 1.531 1.968 2.968 3.968 4.968 5.968 7.968 9.975 12.000 15.200D2 1.937 2.343 3.343 4.343 5.343 6.343 8.343 10.350 12.430 15.65
28、0NOTE 1The dimensions A and B found in the table are mandatory.Dimensions D1 and D2 found in the table are referenced only for molddesign. Sealing ring shape and dimensions are to manufacturers design.NOTE 2Dimensional tolerances to be RMA Class 3 (see Table 2).FIG. 2 Rubber GasketTABLE 2 Dimensiona
29、l Tolerances for Rubber StandardDimensional Tolerances RMA CLASS 3Size, in. Fixed, Closure, 0 to 0.499 0.010 0.0150.500 to 0.999 0.010 0.0181.000 to 1.999 0.015 0.0202.000 to 2.999 0.020 0.0253.000 to 3.999 0.025 0.0304.000 to 4.999 0.030 0.0355.000 to 7.999 0.035 0.050NOTE 18.000 and overmultiplied
30、 by 0.0050. These are commercialtolerances. All diametric dimensions shall have a tolerance of 61%.C1540 1827. Couplings Requirements and Test Methods7.1 Assemble each coupling to be tested according to themanufacturers instructions between two sections of randomlyselected hubless cast iron soil pip
31、e meeting the requirements ofCISPI 301 or Specification A888 and conduct deflection andshear tests. In addition, unrestrained hydrostatic tests shall beperformed as detailed in 7.2. The deflection and shear testsshall be performed on each size and type coupling utilizing firstarticle approval as req
32、uired, not to exceed 120 days. Theunrestrained hydrostatic test shall be performed on randomlyselected couplings of each size during the course of productionusing first article selection, not to exceed 30 days.7.1.1 Deflection Test:7.1.1.1 A test apparatus such as the one shown in Fig. 4 issuggested
33、. Other testing apparatus that provide restraint to theassembly shall also be permitted. Close the outboard ends ofthe pipe with test plugs.7.1.1.2 Fill the assembly with water, expel all air, andhydrostatically pressurize to 8.6 psi (59.3 kPa) for the durationof the test. One pipe shall be rigidly
34、supported and while theassembly is under pressure, raise the opposite end of the otherpipe 1 in. (25 mm) per lineal foot of pipe. Maintain the pressurefor 15 min. Any leakage shall mean failure.7.1.2 Shear Test:7.1.2.1 Support two joined lengths of randomly selectedhubless cast iron soil pipe on blo
35、cks, a minimum of 112 in.(38.1 mm) high, at three locations. One length shall be aminimum of 24 in. (609.6 mm) in length, supported on blocks,one near the uncoupled end, and the other immediatelyadjacent to the couplings. Firmly restrain this length in positionas shown in Fig. 5. The other coupled l
36、ength shall be aminimum of 5 ft (1.52 m) in length and supported by a singleblock 6 in. (152.4 mm) from the end of the pipe.7.1.2.2 Fill the assembly with water and expel all air. Applya load of 50 lb per in. (22.7 kg) of nominal diameter at a point6 in. (152.4 mm) from the edge of the coupling upon
37、 a 12-in.(304.8-mm) length of 3 by 3-in. (76.2 by 76.2-mm) angle ironor load distribution pad located on the top of the pipeimmediately adjacent to the coupling of the pipe having onesupport only. Under this loading there shall be no visibleleakage or displacement of more than38 in. (9.53 mm) fromtr
38、ue alignment adjacent to the coupling, when an internalpressure equivalent to a 20-ft (6.10-m) head of water 8.6 psi(59.3 kPa) is applied. Maintain the load and internal pressurefor 15 min.7.2 Unrestrained Hydrostatic Joint Test:7.2.1 Assemble each coupling to be tested according to themanufacturers
39、 instruction between two sections of machinedsteel pipe and conduct the unrestrained hydrostatic joint test.7.2.2 The assembly shall consist of a maximum outsidediameter pipe connected to a minimum outside diameter pipewith diameters as referenced in Table 4 and lengths as shownFIG. 1 Typical Center
40、 Stop DetailTABLE 3 Material SpecificationsBand Type 301 AISI stainless steel minimum tensile 140 000 psi for 112 to15 in.; Type 304 AISI stainless steel ispermitted.Type 304 AISI stainless steel minimum tensile 140 000 psiEyelets/Rivets Type 300 grade AISI stainless steelScrew Housing Type 301 AISI
41、 stainless steel for 112to 15 in.; Type 304 AISI stainless steelis permitted.Screw Type 305 AISI or Type 304L, or both,annealed stainless steel manufacturers shall identifyrecommended installation torques fortheir couplings either on the couplingsor within installation instructions.Shield Type 301 A
42、ISI or Type 304, or both,AISI stainless steel (annealed andpickled not acceptable)Hardness Rockwell B-100 (Vickers240) in accordance with A240/A240Mmax (max burr height not to exceed25 % of thickness)Thickness 0.0065 in. minC1540 183in Fig. 6. Machine the plain ends of the pipe to be used for thethr
43、ust test to the correct diameters. Plain ends shall have0.015-in. (0.38-mm) deep grooves machined circumferentiallyaround them at18-in. (3.18-mm) intervals down the pipesection for a distance equal to that covered by the elastomericsleeve of the coupling being tested. The tool used to machineFIG. 3
44、Shield and Clamp AssemblyC1540 184the grooves shall have a 60 included angle and cut into thepipe from a perpendicular position. The surface between thegrooves shall be a lathe-turned surface of 125 RMS.7.2.3 The plain ends of the pipe for the thrust test shall beuncoated and cleaned with acetone an
45、d thoroughly dried beforeeach assembly.7.2.4 Test Method:7.2.4.1 Support the pipe assemblies in a manner that doesnot restrain joint movement as shown in Fig. 6.7.2.4.2 Fill the pipe assembly (as required in 7.2) withwater, expelling all air. Increase the hydrostatic pressure at arate of 1 psi (6.9
46、kPa) every 30 s until the specified testpressure is reached. The specified test pressure shall be 30 psi(206.8 kPa) for 112 in. (38.1 mm) through 5 in. (127 mm),27 psi (186 kPa) for 6 in. (152.4 mm), 15 psi (103.4 kPa) for8 in. (203.2 mm), 9 psi (62 kPa) for 10 in. (254 mm), and 6 psi(31.3 kPa) for
47、12 and 15 in. pipe. When the specified testpressure is reached, hold it for 15 min. Any leakage or axialjoint movement of more than 0.150 in. (3.81 mm) shall meanfailure.8. Markings and Identification8.1 Permanently mark each clamp assembly or shield withthe manufacturers name or U.S. registered tra
48、demark, countryof origin, all stainless, and the pipe size for which it isdesigned. Marking shall be visible after installation.8.2 Gasket markings shall conform to Specification C564.Pipe Size, In.Dimensions, in.PCL W Y112 0.813 .25 6.688 Ref. 7.37 min 3.000 .015 2.00 ref.2 0.813 .25 8.188 Ref. 8.8
49、7 min 3.000 .015 2.50 ref.3 0.813 .25 11.438 Ref. 12.12 min 3.000 .015 3.50 ref.4 0.813 .25 14.813 Ref. 15.49 min 3.000 .015 4.50 ref.5 2.375 .50 17.563 Ref 19.69 min 4.000 .015 5.75 ref.6 2.375 .50 20.250 Ref 22.38 min 4.000 .015 6.75 ref.8 3.000 .50 26.000 Ref. 28.75 min 4.000 .015 8.75 ref.10 3.000 .50 33.250 Ref. 36.00 min 4.000 .015 10.9 ref.12 3.500 .50 39.100 Ref. 42.30 min 5.500 .015 12.9 ref.15 3.500 .50 49.200 Ref. 52.40 min 5.500 .015 16.12 ref.NOTE 1The “P” dimension
