1、Designation: C1540 14C1540 15Standard 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 r
2、evision, 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 performance of heavy duty shielded couplings to j
3、oin hubless cast iron soilpipe and fittings.1.2 Couplings covered by this standard shall have nominal dimensions as found in Table 1 and Fig. 1 of this standard.1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI
4、 units that are provided for information only and are not considered standard.1.4 The following precautionary caveat pertains only to the test method portion, Section 7, of this specification. This standarddoes not purport to address all of the safety concerns, if any, associated with its use. It is
5、 the responsibility of the user of thisstandard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A240/A240M Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Shee
6、t, and Strip for Pressure Vessels andfor General ApplicationsA493 Specification for Stainless Steel Wire and Wire Rods for Cold Heading and Cold ForgingA644 Terminology Relating to Iron CastingsA888 Specification for Hubless Cast Iron Soil Pipe and Fittings for Sanitary and Storm Drain, Waste, and V
7、ent PipingApplicationsC564 Specification for Rubber Gaskets for Cast Iron Soil Pipe and FittingsD3677 Test Methods for RubberIdentification by Infrared Spectrophotometry2.2 CISPI Standards:3CISPI-301 Specification for Hubless Cast Iron Soil Pipe and Fittings for Sanitary and Storm Drain, Waste and V
8、ent PipingApplicationsCISPI-310 Specification for couplings for use in Connection with Hubless Cast Iron Soil Pipe and Fittings for Sanitary andStorm Drain, Waste and Vent Piping Applications2.3 Factory Mutual Standards:4FM 1680 Approval Standard for Couplings Used in Hubless Cast Iron Systems for D
9、rain, Waste or Vent, Sewer, Rainwater orStorm Drain Systems Above and Below Ground, Industrial/Commercial and Residential3. Terminology3.1 Definitions of the following terms used in this specification are found in Terminology A644.3.2 Definitions of Terms Specific to This Standard:1 This specificati
10、on is under the jurisdiction of ASTM Committee A04 on Iron Castings and is the direct responsibility of Subcommittee A04.75 on Gaskets and Couplingfor Plumbing and Sewer Piping.Current edition approved Oct. 1, 2014June 1, 2015. Published February 2015June 2015. Originally approved in 2002. Last prev
11、ious edition approved in 20112014 asC1540 11.C1540 14. DOI: 10.1520/C1540-14.10.1520/C1540-15.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document
12、Summary page on the ASTM website.3 Available from Cast Iron Soil Pipe Institute (CISPI), 5959 Shallowford Rd., Suite 419, Chattanooga, TN 37421, 2401 Fieldcrest Dr., Mundelein, IL 60060,http:/www.cispi.org.4 Available from FM Approvals, P.O. Box 9102, Norwood, MA 02062. http:/.This document is not a
13、n ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate.
14、In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.2.1 center stop, nan integral part of the gasket centered on the axi
15、al length of the gasket intended to limit the insertion depthof the pipe to be coupled.3.2.2 clamp assembly, nthat portion of the coupling excluding the gasket.3.2.3 coupling, nthe complete assembly.3.2.4 coupling manufacturer, nthe entity that assembles the gasket with the clamp and shield assembly
16、.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.3.2.7 gasket manufacturer, nthe entity that molds the gaskets inserted into the couplings covered by this standard specification.3.2.8 heavy duty coupling, na s
17、hielded coupling that has dimensions detailed in Table 1 and Fig. 1.3.2.9 joint, nthe point of assembly consisting of the coupling and the joined pipes or fittings, or both.3.2.10 shield, nan external metallic protective device designed to protect the sealing gasket from external elements that could
18、cause failure of the sealing assembly.4. Materials and Manufacture4.1 Physical and chemical properties of gaskets shall comply with Specification C564 in accordance with Column “C” of Table1 of that document. Typical dimensions shall be in accordance with Fig. 2 and Table 2.4.2 Clamp assembly screws
19、 or bolts shall not have screwdriver slots.4.3 All stainless steel shall meet the physical requirements of Specification A240/A240M.5. Elastomeric Gasket Requirements5.1 The gasket shall be tested in accordance with Test Methods D3677 and be manufactured from a properly vulcanized virgincompound whe
20、re the primary elastomer is polychloroprene (neoprene).5.2 The elastomeric gasket shall consist of one piece construction conforming to the physical requirements of SpecificationC564. The gaskets shall be tested by the gasket manufacturer for compliance to Specification C564 a minimum of 24 hours af
21、terproduction, but not longer than 72 hours after time of production. These tests shall include hardness, elongation and tensilestrength, tear strength and compression set. Heat, aging, water absorption, ozone resistance and oil immersion tests shall beconducted annually or when a formulation change
22、s, or a supplier changes, whichever occurs first.5.2.1 The elastomeric gasket shall have an inside center stop that does not create an enlargement chamber or recess with a ledge,shoulder, or reduction of pipe area or offer an obstruction to flow.5.2.2 The elastomeric gasket shall be free of defects
23、that affect the use and serviceability.FIG. 1 Typical Center Stop DetailTABLE 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)C1540 1526. Clamp Assembly Requirements6.1 The clamp
24、assembly shall be made of material conforming to the requirements as outlined in Sections 4 and 6, Table 3, andFig. 3.6.1.1 All metallic parts shall be of 300 series stainless steel and shall conform to the requirements of SpecificationA240/A240M.All metallic parts made from round stock shall be of
25、300 series stainless steel and shall conform to the requirementsof Specification A493 (excluding copper bearing alloys).6.1.2 Clamp assemblies shall be tested to withstand no less than 125 % of the manufacturers stated installation torque withoutvisible signs of failure. The clamp assembly shall be
26、tested over a steel mandrel of the appropriate diameter and torqued asrequired. These tests shall be performed on randomly selected samples during the course of production as needed, but not less thanone clamp per shift per size during clamp assembly production.7. Couplings Requirements and Test Met
27、hods7.1 Assemble each coupling to be tested according to the manufacturers instructions between two sections of randomly selectedhubless cast iron soil pipe meeting the requirements of CISPI 301 or Specification A888 and conduct deflection and shear tests.Dimensions1 1/2 in. 2 in. 3 in. 4 in. 5 in.
28、6 in. 8 in. 10 in. 12 in. 15 in.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 15.650NOTE 1The dimensi
29、ons A and B found in the table are mandatory. Dimensions D1 and D2 found in the table are reference only for mold design.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 Dimensional Tolerances for R
30、ubberStandardDimensional 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 0.050C1540 153FIG. 3 Shield and Clamp Assembly.NOTE 18
31、.000 and overmultiplied by 0.0050. These are commercialtolerances. All diametric dimensions shall have a tolerance of 6 1 %.C1540 154In addition, unrestrained hydrostatic tests shall be performed as detailed in 7.2. The deflection and shear tests shall be performedon each size and type coupling util
32、izing first article approval as required not to exceed 120 days. The unrestrained hydrostatic testshall be performed on randomly selected couplings of each size during the course of production using first article selection not toexceed 30 days.7.1.1 Deflection Test:7.1.1.1 A test apparatus such as t
33、he one shown in Fig. 4 is suggested. Other testing apparatus that provide restraint to theassembly shall also be permitted. Close the outboard ends of the pipe with test plugs.Pipe Size, In. Dimensions, in.P C L W112 0.813 .25 6.688 Ref. 7.37 min 3.000 .0152 0.813 .25 8.188 Ref. 8.87 min 3.000 .0153
34、 0.813 .25 11.438 Ref. 12.12 min 3.000 .0154 0.813 .25 14.813 Ref. 15.49 min 3.000 .0155 2.375 .50 17.563 Ref 19.69 min 4.000 .0156 2.375 .50 20.250 Ref 22.38 min 4.000 .0158 3.000 .50 26.000 Ref. 28.75 min 4.000 .01510 3.000 .50 33.250 Ref. 36.00 min 4.000 .01512 3.500 .50 39.100 Ref. 42.30 min 5.5
35、00 .01515 3.500 .50 49.200 Ref. 52.40 min 5.500 .015Pipe Size, In. Dimensions, in.P C L W Y112 0.813 .25 6.688 Ref. 7.37 min 3.000 .015 2.00 ref.2 0.813 .25 8.188 Ref. 8.87 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
36、 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.
37、52.40 min 5.500 .015 16.12 ref.NOTE 1The “P” dimension is allowed on either end of the part. A “P” dimension is required on shield designs that have a single corrugated pattern.Shield material thickness and the corrugated or pattern height is to be measured with a caliper or a disc micrometer. The m
38、aterial thickness is .0065 Min.Three random measurements of shield corrugated height should be taken and the median used as the value.FIG. 3 Shield and Clamp Assembly. (continued)TABLE 3 Material SpecificationsBand Type 301 AISI Stainless SteelMinimum Tensile 140 000 psi for 1 1/2to 15 in.; Type 304
39、 AISI StainlessSteel is permitted.Type 304 AISI Stainless SteelMinimum Tensile 140 000 psiEyelets/Rivets Type 300 grade AISI Stainless SteelScrew Housing Type 301 AISI Stainless Steel for 1 1/2to 15 in.; Type 304 AISI StainlessSteel is permitted.Screw Type 305 AISI or Type 304L, or both,Annealed Sta
40、inless SteelManufacturers shall identifyrecommended installation torques fortheir couplings either on the couplingsor within installation instructions.Shield Type 301 AISI or Type 304, or both,AISI Stainless Steel (Annealed andPickled Not Acceptable)HardnessRockwell B-100 (Vickers240) in accordance
41、with A240/A240MMax (Max Burr Height Not to Exceed25 % of Thickness)Thickness0.0065 in. MinC1540 1557.1.1.2 Fill the assembly with water, expel all air, and hydrostatically pressurize to 8.6 psi (59.3 kPa) for the duration of the test.One pipe shall be rigidly supported and while the assembly is unde
42、r pressure, raise the opposite end of the other pipe 1 in. (25mm) per lineal foot of pipe. Maintain the pressure for 15 min. Any leakage shall mean failure.7.1.2 Shear Test:7.1.2.1 Support two joined lengths of randomly selected hubless cast iron soil pipe on blocks, a minimum of 112 in. (38.1 mm)hi
43、gh, at three locations. One length shall be a minimum of 24 in. (609.6 mm) in length, supported on blocks, one near theuncoupled end, and the other immediately adjacent to the couplings. Firmly restrain this length in position as shown in Fig. 5. Theother coupled length shall be a minimum of 5 ft (1
44、.52 m) in length and supported by a single block 6 in. (152.4 mm) from theend of the pipe.7.1.2.2 Fill the assembly with water and expel all air. Apply a load of 50 lb per in. (22.7 kg) of nominal diameter at a point 6in. (152.4 mm) from the edge of the coupling upon a 12 in. (304.8 mm) length of 3
45、by 3 in. (76.2 by 76.2 mm) angle iron or loaddistribution pad located on the top of the pipe immediately adjacent to the coupling of the pipe having one support only. Underthis loading there shall be no visible leakage or displacement of more than 38 in. (9.53 mm) from true alignment adjacent to the
46、coupling, when an internal pressure equivalent to a 20 ft (6.10 m) head of water 8.6 psi (59.3 kPa) is applied. Maintain the loadand internal pressure for 15 min.7.2 Unrestrained Hydrostatic Joint Test:7.2.1 Assemble each coupling to be tested according to the manufacturers instruction between two s
47、ections of machined steelpipe and conduct the unrestrained hydrostatic joint test.7.2.2 The assembly shall consist of a maximum outside diameter pipe connected to a minimum outside diameter pipe withdiameters as referenced in Table 4 and lengths as shown in Fig. 6. Machine the plain ends of the pipe
48、 to be used for the thrust testto the correct diameters. Plain ends shall have 0.015 in. (0.38 mm) deep grooves machined circumferentially around them at 18in. (3.18 mm) intervals down the pipe section for a distance equal to that covered by the elastomeric sleeve of the coupling beingtested. The to
49、ol used to machine the grooves shall have a 60 included angle and cut into the pipe from a perpendicular position.The surface between the grooves shall be a lathe turned surface of 125 RMS.7.2.3 The plain ends of the pipe for the thrust test shall be uncoated and cleaned with acetone and thoroughly dried before eachassembly.7.2.4 Test Method:7.2.4.1 Support the pipe assemblies in a manner that does not restrain joint movement as shown in Fi
