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ASTM A1056 - 12.pdf

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ASTM A1056 - 12.pdf

Designation A1056 − 12Standard 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 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 hubless cast iron soil pipe andfittings for sizes 11⁄2 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 revision, 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 caveat 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 and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards2A48/A48M Specification for Gray Iron CastingsA644 Terminology Relating to Iron CastingsA888 Specification for Hubless Cast Iron Soil Pipe andFittings for Sanitary 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 Standards3ASME B18.2.1 Square and Hex Bolt and Screws Inch SeriesASME B18.1.2 Square and Hex Nuts Inch Series2.3 CISPI Standard4CISPI-301 Specification for Hubless Cast Iron Soil Pipe andFittings for Sanitary and Storm Drain, Waste and VentPiping Applications3. Terminology3.1 Definitions3.1.1 Definitions of the following terms used in this speci-fication are found in Terminology A644 elastomeric, durom-eter and dynamic.3.2 Definitions of Terms Specific to This Standard3.2.1 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.3.2.2 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 consisting of thecoupling and the joined pipes or fittings, or both.3.2.7 manufacturer of the clamp assembly, n the entitythat casts the clamp assembly.3.2.8 manufacturer of the coupling, 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.1This specification is under the jurisdiction of ASTM Committee A04 on IronCastings and is the direct responsibility of Subcommittee A04.75 on Gaskets andCoupling for Plumbing and Sewer Piping.Current edition approved Dec. 1, 2012. Published January 2013. Originallyapproved in 2008. Last previous edition approved in 2008 as A1056 – 08. DOI10.1520/A1056-12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standard’s 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.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 States14. Materials and Manufacture4.1 Physical properties of gaskets shall comply with Speci-fication C564 and the dimensions, material specifications,physical and chemical properties as shown in Fig. 1, Fig. 2,Table 1, and Table 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.Dimensions in. mm11⁄2 38.100 2 50.800 3 76.200 4 101.600 5 127.000 6 152.400 8 203.200 10 254.000A 2.12553.9752.12553.9752.12553.9752.12553.9753.00076.2003.00076.2004.000101.6004.000101.600B 1.53138.8871.96950.0132.96975.4134.000101.6004.969126.2135.969151.6137.969202.41310.085256.159C 1.93749.2002.34459.5383.34484.9384.406111.9125.344135.7376.344161.1388.344211.93810.460265.684D 1.53138.8871.96950.0132.96975.4134.000101.6004.969126.2135.969151.6137.969202.41310.085256.159E 1.03726.3402.25057.1503.25082.5504.313109.5505.250133.3506.250158.7508.250209.55010.366263.296F 1.93749.2002.34459.5383.34484.9384.406111.9125.344135.7376.344161.1388.344211.93810.460265.684G 2.12553.9752.53164.2873.53189.6874.594116.6885.532140.5136.532165.9138.532216.71310.650270.510H 2.21956.3632.62566.6753.62592.0754.684118.9745.626142.9006.626168.3008.626219.10010.744272.898J 2.31358.7502.71969.0633.71994.4634.781121.4375.720145.2886.720170.6888.720221.48810.838275.285NOTE 1Dimensional Tolerances to be RMA Class 3 see Table 1.FIG. 1 Rubber GasketA1056 − 1224.2.1 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 7 years.4.2.2 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 determined 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 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 consist of one piece con-forming to the physical requirements of Specification C564with hardness nominal durometer 6 5 70 as tested inaccordance with Specification D2240.5.1.1 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 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 clamp assembly shall comply with dimensionspecifications, as are given in Fig. 2, Fig. 3, and Fig. 4. Theclamp assembly shall consist of two sections that interlockusing a nut and bolt. The clamp assembly shall have theminimum wall thickness along the ring wall and the minimumwall thickness along the ear wall with tapered ends as shownon Fig. 4.6.1.2 Clamp assemblies shall be tested to withstand no lessthan 125 of manufacturer of the coupling’s 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 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 OD’s of pipe and fittings asshown in Table 3.7. Sampling7.1 The manufacturer of the coupling shall, upon receipt ofa shipment of clamp assemblies from the manufacturer of theNominal Size – in. mm Coupling Size – in. mm Bolt Size – in. mmCouplingSizePipe Diameter Height X Width Y Depth Z No. Size Length11⁄2 38 1.90 .06 48.26 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 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 9.50 241.300 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 6 0.125 in. 0.975 unless otherwise specified.FIG. 2 Clamp Assembly DimensionsTABLE 1 Dimensional Tolerances for RubberStandardDimensional Tolerances RMA CLASS 3NOTE 18.000 and overmultiplied by 0.0050. These are commercialtolerances.Size in. mmFixed, in. mmClosure, in. mm0 to 0.499 0 to 12.675 0.010 0.254 0.015 0.3810.500 to 0.999 12.700 to 25.375 0.010 0.254 0.018 0.4571.000 to 1.999 25.400 to 50.744 0.015 0.381 0.020 0.5082.000 to 2.999 50.800 to 76.175 0.020 0.508 0.025 0.6353.000 to 3.999 76.200 to 101.575 0.025 0.635 0.030 0.7624.000 to 4.999 101.600 to 126.975 0.030 0.762 0.035 0.8895.000 to 7.999 127.000 to 203.175 0.035 0.889 0.050 1.270A1056 − 123clamp 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 manufacturer of the clamp assemblies. Themanufacturer of the coupling shall retain the test results andrelated documentation for not less than 7 years.8. Coupling Requirements and Test Methods8.1 Assemble each coupling tested according to the manu-facturer of the coupling’s 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 pipemeeting 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 Test8.1.1.1 A test apparatus such as the one shown 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. One pipe shall be rigidly supported and while theassembly is under pressure, raise the opposite end of the otherpipe1⁄2 in. 12.7 mm per lineal foot of pipe. Maintain thepressure for 5 min. Any leakage shall mean failure.8.1.2 Shear Test8.1.2.1 Support two joined lengths of randomly selectedhubless cast iron soil pipe on blocks, a minimum of 11⁄2 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 positionTABLE 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 the 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 in hardness, alldeterminations after oven aging for 96 h at 158F 70CD573Compression Set 25 max after 22 h at 158F 70C D395 Method BOil Immersion 80 max volume change after immersion in ASTM oil no. IRM903 for 70 h at 212F 100C D471Ozone Cracking No visible cracking at 2 times magnification of the gasket after 100 h. Exposure in 1.5 ppm ozoneconcentration at 100F 37.778C. Testing and inspection to be on gasket which is loop mountedto give approximately 20 elongation of outer surfaceD1149Tear Resistance Die C; 150 lb 68.089 mm min per in. 25.400 mm of thickness D624Water Absorption 20 max by weight after 7 days at 158F 70C D471Nominal Pipe SizeStyle 1 Style 2ABCD11⁄2 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 6 0.125 in. 0.975 unless otherwise specified.FIG. 3 Bolt Hole Layout DimensionsA1056 − 124as shown in 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. 152.4mm from the edge of the coupling upon a 12 in. 304.8 mmlength of 3 by 3 angle iron or load distribution pad located onthe top of the pipe immediately adjacent to the coupling of thepipe having one support only. Under this loading there shall beno visible leakage or displacement of more than3⁄8 in. 9.53mm from true alignment adjacent to the coupling, when aninternal pressure equivalent to a 10 ft 3.05 m head of water.4.3 psi 29.6 kPa is applied. Maintain the load and internalpressure for 15 min.8.1.3 Unrestrained Hydrostatic Test 8.1.3.1 Assemble each coupling tested according to themanufacturer’s instruction between two sections of pipe andconduct the unrestrained hydrostatic test.8.1.3.2 The assembly shall consist of a maximum outsidediameter pipe connected to a minimum outside diameter pipewith diameters as referenced i

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