1、Designation: A1056 12 (Reapproved 2017)Standard Specification forCast Iron Couplings Used for Joining Hubless Cast Iron SoilPipe and Fittings1This standard is issued under the fixed designation A1056; the number immediately following the designation indicates the year oforiginal adoption or, in the
2、case of revision, 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 materials and testing ofcast iron couplings for joining hu
3、bless cast iron soil pipe andfittings for sizes 112 to 10 in.1.2 It is the purpose of this specification to furnish informa-tion as to the characteristics of a particular sleeve type couplingwhen applied to cast iron soil pipe and fittings manufactured inaccordance with Specification A888, latest re
4、vision, and CISPIDesignation 301, latest revision.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 for information onlyand are not considered standard.1.4 The following precautionary cav
5、eat pertains only to thetest method portion, Section 8, 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 userof this standard to establish appropriate safety, health, andenvironmental practices
6、 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 Decision on Principles for theDevelopment of International Standards, Guides and Recom
7、-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A48/A48M Specification for Gray Iron CastingsA644 Terminology Relating to Iron CastingsA888 Specification for Hubless Cast Iron Soil Pipe andFittings for Sanitary
8、and Storm Drain, Waste, and VentPiping ApplicationsC564 Specification for Rubber Gaskets for Cast Iron SoilPipe and FittingsD2240 Test Method for Rubber PropertyDurometer Hard-nessE8 Test Methods for Tension Testing of Metallic Materials2.2 ASME Standards:3ASME B18.2.1 Square and Hex Bolt and Screws
9、 Inch SeriesASME B18.1.2 Square and Hex Nuts (Inch Series)2.3 CISPI Standard:4CISPI-301 Specification for Hubless Cast Iron Soil Pipe andFittings for Sanitary and Storm Drain, Waste and VentPiping Applications3. Terminology3.1 Definitions:3.1.1 Definitions of the following terms used in this speci-f
10、ication are found in Terminology A644: elastomeric, durom-eter and dynamic.3.2 Definitions of Terms Specific to This Standard:3.2.1 center stop, nan integral part of the gasket centeredon the axial length of the gasket intended to limit the insertiondepth of the pipe and/or fitting to be coupled.3.2
11、.2 clamp assembly, nthat portion of the coupling ex-cluding the gasket, nuts, and bolts.3.2.3 coupling, nthe complete assembly.3.2.4 fitting, nparts of a pipeline other than straight pipes,valves, or couplings.3.2.5 gasket, nthe elastomeric portion of the coupling.3.2.6 joint, nthe point of assembly
12、 consisting of thecoupling and the joined pipes or fittings, or both.3.2.7 manufacturer of the clamp assembly, nthe entity thatcasts the clamp assembly.1This specification is under the jurisdiction of ASTM Committee A04 on IronCastings and is the direct responsibility of Subcommittee A04.75 on Gaske
13、ts andCoupling for Plumbing and Sewer Piping.Current edition approved Oct. 1, 2017. Published October 2017. Originallyapproved in 2008. Last previous edition approved in 2012 as A1056 12. DOI:10.1520/A1056-12R17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Cus
14、tomer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.
15、asme.org.4Available from Cast Iron Soil Pipe Institute (CISPI), 5959 Shallowford Rd.,Suite 419, Chattanooga, TN 37421, http:/www.cispi.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in acc
16、ordance with internationally recognized principles on standardization 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.13.2.8 manufacturer of the coup
17、ling, nthe entity that as-sembles the components of the coupling such as the gasket andthe clamp assembly.3.2.9 manufacturer of the gasket, nthe entity that producesthe elastomeric portion of the coupling.4. Materials and Manufacture4.1 Physical properties of gaskets shall comply with Speci-fication
18、 C564 and the dimensions, material specifications, andphysical and chemical properties as shown in Figs. 1 and 2 andTables 1 and 2.4.2 All cast iron parts shall be made of a minimum class 25cast iron and shall show compliance to this requirement usingtest methods contained in Specification A48/A48M.
19、4.2.1 The manufacturer of the clamp assembly shall per-form tests to determine mechanical properties of the iron usedin the manufacture of iron soil couplings. Tension test speci-mens shall be employed. The manufacturer of the clampassembly shall maintain a record of mechanical tests for aminimum of
20、 seven years.Dimensions in. (mm)112 (38.100) 2 (50.800) 3 (76.200) 4 (101.600) 5 (127.000) 6 (152.400) 8 (203.200) 10 (254.000)A 2.125(53.975)2.125(53.975)2.125(53.975)2.125(53.975)3.000(76.200)3.000(76.200)4.000(101.600)4.000(101.600)B 1.531(38.887)1.969(50.013)2.969(75.413)4.000(101.600)4.969(126.
21、213)5.969(151.613)7.969(202.413)10.085(256.159)C 1.937(49.200)2.344(59.538)3.344(84.938)4.406(111.912)5.344(135.737)6.344(161.138)8.344(211.938)10.460(265.684)D 1.531(38.887)1.969(50.013)2.969(75.413)4.000(101.600)4.969(126.213)5.969(151.613)7.969(202.413)10.085(256.159)E 1.037(26.340)2.250(57.150)3
22、.250(82.550)4.313(109.550)5.250(133.350)6.250(158.750)8.250(209.550)10.366(263.296)F 1.937(49.200)2.344(59.538)3.344(84.938)4.406(111.912)5.344(135.737)6.344(161.138)8.344(211.938)10.460(265.684)G 2.125(53.975)2.531(64.287)3.531(89.687)4.594(116.688)5.532(140.513)6.532(165.913)8.532(216.713)10.650(2
23、70.510)H 2.219(56.363)2.625(66.675)3.625(92.075)4.684(118.974)5.626(142.900)6.626(168.300)8.626(219.100)10.744(272.898)J 2.313(58.750)2.719(69.063)3.719(94.463)4.781(121.437)5.720(145.288)6.720(170.688)8.720(221.488)10.838(275.285)NOTE 1Dimensional Tolerances to be RMA Class 3 (see Table 1).FIG. 1 R
24、ubber GasketA1056 12 (2017)24.2.2 Tensile Strength TestTest bars shall be cast inaccordance with the requirements of Specification A48/A48M.The machined test bar dimensions and drawing and dimensionsof as-cast test bars are found in Fig. 1 of Specification A888.The tensile strength shall be determin
25、ed in accordance withTest Methods E8. The tensile strength shall be not less than25 000 psi (145 MPa).4.2.3 Tension test reports shall include breaking load of testbars, machined diameter of test bar, and calculated tensilestrength.4.2.4 Analysis of castings or test bars after the time ofproduction
26、shall not be used as evidence of compliance to thisspecification.4.3 Nuts and bolts shall be stainless steel Grade 304, shallconform to the requirements of ASME Specification B18.2.1and B18.2.2, and shall not have screwdriver slots.5. Elastomeric Gasket Requirements5.1 The elastomeric gasket shall c
27、onsist of one piece con-forming to the physical requirements of Specification C564with hardness (nominal durometer 6 5) 70 as tested inaccordance with Test Method D2240.5.1.1 The elastomeric gasket shall have an inside center stopthat does not create an enlargement chamber or recess with aledge, sho
28、ulder, or reduction of pipe area or offer an obstruc-tion to flow.5.1.2 The elastomeric gasket shall be free of defects thataffect the use and serviceability.6. Clamp Assembly Requirements6.1 The clamp assembly material shall be class 25 cast ironand comply with 4.2.2 of this specification.6.1.1 The
29、 clamp assembly shall comply with dimensionspecifications, as are given in Figs. 2-4. The clamp assemblyshall consist of two sections that interlock using a nut and bolt.The clamp assembly shall have the minimum wall thicknessalong the ring wall and the minimum wall thickness along theear wall, with
30、 tapered ends as shown on Fig. 4.6.1.2 Clamp assemblies shall be tested to withstand no lessthan 125 % of manufacturer of the couplings stated installa-tion torque or a minimum of 175 lbfin. (19.77 Nm) of appliedtorque, whichever is greater, without visible signs of failure.The clamp assembly shall
31、be tested over a steel mandrel of theappropriate diameter and torqued as required.6.1.3 The clamp assembly shall be designed to accommo-date maximum and minimum ODs of pipe and fittings asshown in Table 3.7. Sampling7.1 The manufacturer of the coupling shall, upon receipt ofa shipment of clamp assem
32、blies from the manufacturer of theclamp assemblies, take a random sampling of couplingsmanufactured therefrom and subject them to the tests specifiedin Section 8. If a coupling fails any of the tests, then the entireshipment of clamp assemblies of that size shall be rejected andreturned to the manuf
33、acturer of the clamp assemblies. Themanufacturer of the coupling shall retain the test results andrelated documentation for not less than seven years.Nominal Size in. (mm) Coupling Size in. (mm) Bolt Size in. (mm)CouplingSizePipe Diameter Height X Width Y Depth Z No. Size Length112 (38) 1.90 .06 (48
34、.26 1.52) 2.875 (73.025) 4.50 (114.300) 2.125 (53.975) 2 0.375 1.502 (50) 2.35 .09 (59.69 2.29) 3.375 (85.725) 4.875 (123.825) 2.125 (53.975) 2 0.375 1.503 (76) 3.35 .09 (85.09 2.229) 4.25 (107.950) 6 (152.400) 2.125 (53.975) 2 0.375 1.504 (101) 4.38 +.09/-.05 (111.252 + 2.286 1.270) 5.25 (133.350)
35、7 (177.800) 2.125 (53.975) 2 0.375 1.505 (127) 5.30 +.09/-.05 (111.25 + 2.229 1.27) 6 .25 (158.750) 8.625 (219.075) 3.125 (79.375) 4 0.375 1.506 (152) 6.30 +.09/-.05 (160.02 + 2.229 1.270) 7.50 (190.500) 9.25 (234.950) 3.125 (79.375) 4 0.375 1.508 (203) 8.38 +.09/-.09 (212.85 + 3.3 2.29) 9.50 (241.3
36、00) 11.75 (298.450) 4 (101.600) 4 0.375 210 (254) 10.56 .09 (268.22 2.29) 11.813 (300.203) 14.33 (364.058) 4 (101.600) 4 0.3752.25NOTE 1Tolerance shall be 60.125 in. (0.975) unless otherwise specified.FIG. 2 Clamp Assembly DimensionsTABLE 1 Dimensional Tolerances for Rubber StandardDimensional Toler
37、ances RMA CLASS 3NOTE 18.000 and overmultiplied by 0.0050. These are commercialtolerances.Size in. (mm)Fixed, in. (mm)Closure, (in. (mm)0 to 0.499 (0 to 12.675) 0.010 (0.254) 0.015 (0.381)0.500 to 0.999 (12.700 to 25.375) 0.010 (0.254) 0.018 (0.457)1.000 to 1.999 (25.400 to 50.744) 0.015 (0.381) 0.0
38、20 (0.508)2.000 to 2.999 (50.800 to 76.175) 0.020 (0.508) 0.025 (0.635)3.000 to 3.999 (76.200 to 101.575) 0.025 (0.635) 0.030 (0.762)4.000 to 4.999 (101.600 to 126.975) 0.030 (0.762) 0.035 (0.889)5.000 to 7.999 (127.000 to 203.175) 0.035 (0.889) 0.050 (1.270)A1056 12 (2017)38. Coupling Requirements
39、and Test Methods8.1 Assemble each coupling tested according to the manu-facturer of the couplings instructions between two sections ofrandomly selected hubless cast iron soil pipe meeting therequirements of CISPI-301 or Specification A888, or onesection of randomly selected hubless cast iron soil pi
40、pemeeting the requirements of CISPI-301 or Specification A888and a fitting and conduct the following tests: deflection andshear. In addition, an unrestrained hydrostatic test will beperformed between two sections of machined steel pipe.8.1.1 Deflection Test:8.1.1.1 A test apparatus such as the one s
41、hown in Fig. 5 issuggested. Other testing apparatuses that provide restraint tothe assembly shall also be permitted. Close the outboard endsof the pipe with test plugs.8.1.1.2 Fill the assembly with water, expel all air, andhydrostatically pressurize to 4.3 psi (29.6 kPa) for the durationof the test
42、. One pipe shall be rigidly supported and while theassembly is under pressure, raise the opposite end of the otherpipe12 in. (12.7 mm) per lineal foot of pipe. Maintain thepressure for 5 min. Any leakage shall mean failure.8.1.2 Shear Test:8.1.2.1 Support two joined lengths of randomly selectedhuble
43、ss cast iron soil pipe on blocks, 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 coupling. Firmly restrain this length in positionas shown in
44、 Fig. 6. The other coupled length 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.8.1.2.2 Fill the assembly with water and expel all air. Applya load of 50 lb/in. of nominal diameter at a point 6 in.(152.4 mm) from the edge of the
45、 coupling upon a 12-in.TABLE 2 Rubber Gasket Physical RequirementsNOTE 1Material: The sealing sleeve shall be made from an elastomeric compound that meets the requirements of Specification C564.NOTE 2Physical Tests: The test specimens shall be obtained from finished sleeves and tested pursuant to th
46、e methods described in the following table.TestPhysical Tests,Min or Max RequirementsASTM MethodTensile Strength 1500 psi (105.49 kg/cm) min D412Elongation 250 min D412Durometer (Shore A) 705at765 D2240Accelerated Aging 15 % max tensile and 20 % max elongation deterioration, 10 points max; increase
47、in hardness, alldeterminations after oven aging for 96 h at 158 F (70 C)D573Compression Set 25 % max after 22 h at 158 F (70 C) D395 Method BOil Immersion 80 % max volume change after immersion in ASTM oil no. IRM903 for 70 h at 212 F (100 C) D471Ozone Cracking No visible cracking at 2 times magnifi
48、cation of the gasket after 100 h. Exposure in 1.5 ppm ozoneconcentration at 100 F (37.778 C). Testing and inspection to be on gasket which is loopmounted to give approximately 20 % elongation of outer surfaceD1149Tear Resistance Die C; 150 lb (68.089 mm) min per in. (25.400 mm) of thickness D624Wate
49、r Absorption 20 % max by weight after 7 days at 158 F (70 C) D471Nominal Pipe SizeStyle 1 Style 2ABCD112 1.0625 3.7600 2 1.0625 4.1875 3 1.0625 5.1875 4 1.0625 6.3437 5 2.0625 7.59376 2.0625 8.62508 1.6562 10.87510 1.6562 13.315NOTE 1Tolerance shall be 60.125 in. (0.975) unless otherwise specified.FIG. 3 Bolt Hole Layout DimensionsA1056 12 (2017)4(304.8-mm) length of (3 by 3) angle iron or load distributionpad located on the top of the pipe immediately adjacent to
