1、Designation: C1540 11C1540 14Standard 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 minimumnominal dimensions as found in Table 1 and Fig. 1 of this standard.1.3 The committee with jurisdiction over this standard is aware of comparable standards published by other organizations,namely Cast
4、 Iron Soil Pipe Institute specification CISPI-310 and Factory Mutual Research standard FM 1680.1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not consider
5、ed 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 the responsibility of the user of thisstandard to establish appro
6、priate 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, Sheet, and Strip for Pressure Vessels andfor General ApplicationsA493
7、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 Vent PipingApplicationsC564 Specification for Rubber Gaskets for Ca
8、st 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 Vent PipingApplicationsCISPI-310 Specification for couplings for us
9、e 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 Drain, Waste or Vent, Sewer, Rainwater orStorm Drain Systems Above
10、and Below Ground, Industrial/Commercial and Residential3. Terminology3.1 Definitions: Definitions of the following terms used in this specification are found in Terminology A644.3.1.1 Definitions of the following terms used in this specification are found in Terminology A644.1 This specification is
11、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 June 1, 2011Oct. 1, 2014. Published July 2011February 2015. Originally approved in 2002. Last previous e
12、dition approved in 20092011 asC1540 09a.C1540 11. DOI: 10.1520/C1540-11.10.1520/C1540-14.2 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 Summa
13、ry page on the ASTM website.3 Available from Cast Iron Soil Pipe Institute (CISPI), 5959 Shallowford Rd., Suite 419, Chattanooga, TN 37421, http:/www.cispi.org.4 Available from FM Approvals, P.O. Box 9102, Norwood, MA 02062. http:/.This document is not an ASTM standard and is intended only to provid
14、e 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. In all cases only the current versionof the st
15、andard 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 Definitions of Terms Specific to This Standard:3.2.1 center stop, nan integral part of the gasket centered on th
16、e axial 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 attaches the coupling assembly to the shield of th
17、e couplings covered by thisstandard specification.assembles the 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.3.2.7 gasket manufacturer, nthe entity that molds the g
18、askets inserted into the couplings covered by this standard specification.3.2.8 heavy duty coupling, na shielded coupling that has dimensions not less than those 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.
19、2.10 shield, nan external metallic protective device designed to protect the sealing gasket from external elements that couldcause failure of the sealing assembly.4. Materials and Manufacture4.1 Physical and chemical properties of gaskets shall comply with Specification C564 using the applicable dur
20、ometer hardnessrequirement of the columnin accordance with Column “C” of Table 1 of Table 2 of that document as specified by themanufacturer.that document. Typical dimensions shall be in accordance with Fig. 2 and Table 2.4.2 Clamp assembly screws or bolts shall not have screwdriver slots.4.3 All st
21、ainless 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 where the primary elastomer is polychloroprene (neoprene
22、).FIG. 1 Typical Center Stop DetailTABLE 1Nominal Pipe Size Coupling Width112 to 4 in. (38 to 100 mm) 3 in. (76 mm) Minimum Width5 to 10 in. (127 to 254 mm) 4 in. (100 mm) Minimum Width12 to 15 in. (305 to 381 mm) 512 in. (140 mm) Minimum WidthTABLE 1Nominal Pipe Size Nominal Coupling Width112 to 4
23、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 1425.2 The elastomeric gasket shall consist of one piece construction conforming to the physical requirements of SpecificationC564. The gaskets shall be tested by the gasket m
24、anufacturer for compliance to Specification C564 during the course of productionnot to exceed 24 hours for each size of gasket being produced. These tests shall be performed at the manufacturer location duringthe a minimum of 24 hours after production, but not longer than 72 hours after time of prod
25、uction. These tests shall includehardness, elongation and tensile strength, tear strength and compression set. Heat, aging, water absorption, ozone resistance andoil immersion tests shall be conducted annually or when a formulation changes, or a supplier changes, whichever occurs first.5.2.1 The ela
26、stomeric 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 that affect the use and serviceability.6. Clamp Assembly Requi
27、rements6.1 The clamp 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 rou
28、nd stock shall be of 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 cla
29、mp assembly shall be 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 Requ
30、irements and Test Methods7.1 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.In addition, unrestrain
31、ed hydrostatic tests shall be performed as detailed in 7.2. The deflection and shear tests shall be performedon each size and type coupling utilizing first article approval as required not to exceed 120 days. The unrestrained hydrostatic testshall be performed on randomly selected couplings of each
32、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 the one shown in Fig. 24 is suggested. Other testing apparatus that provide restraint to theassembly shall also be permitted. Close the outboard ends of the
33、pipe with test plugs.7.1.1.2 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 under pressure, raise the opposite end of the other pipe 1 in. (25mm) per lineal f
34、oot 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)high, at three locations. One length shall be a minimum of 24 in. (609.6 mm) in
35、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. 35.The other coupled length shall be a minimum of 5 ft (1.52 m) in length and supported by a single block 6 in. (152.4 mm) fromthe end
36、 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 by 3 in. (76.2 by 76.2 mm) angle iron or loaddistribution pad located on the
37、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 thecoupling, when an internal pressure equivalent to a 20 ft (6.10 m) head of wa
38、ter 8.6 psi (59.3 kPa) is applied. Maintain the loadand internal pressure for 15 min.7.2 Unrestrained Hydrostatic Joint Test:TABLE 2 Dimensional Tolerances for RubberStandardDimensional 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 0.0
39、15 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 143FIG. 3 Shield and Clamp Assembly.NOTE 18.000 and overmultiplied by 0.0050. These are commercialtolerances. All diametric dimensions shall have a tolerance of 6 1 %.C1540 1447.2.1
40、Assemble each coupling to be tested according to the manufacturers instruction between two sections 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
41、 as referenced in Table 24 and lengths as shown in Fig. 46. Machine the plain ends of the pipe to be used for the thrusttest to the correct diameters. Plain ends shall have 0.015 in. (0.38 mm) deep grooves machined circumferentially around them at18 in. (3.18 mm) intervals down the pipe section for
42、a distance equal to that covered by the elastomeric sleeve of the coupling beingtested. The tool 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 e
43、nds 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 Fig. 46.7.2.4.2 Fill the pipe assembly (as required in 7.2) with
44、 water, expelling all air. Increase the hydrostatic pressure at a rate of 1psi (6.9 kPa) every 30 s until the specified test pressure is reached. The specified test pressure shall be 30 psi (206.8 kPa) for 112in. (38.1 mm) through 5 in. (127 mm), 27 psi (186 kPa) for 6 in. (152.4 mm), 15 psi (103.4
45、kPa) for 8 in. (203.2 mm), 9 psi (62kPa) for 10 in. (254 mm), and 6 psi (31.3 kPa) for 12 and 15 in. pipe. When the specified test pressure is reached, hold it for 15min. Any leakage or axial joint movement of more than 0.150 in. (3.81 mm) shall mean failure.8. Markings and Identification8.1 Permane
46、ntly mark each clamp assembly or shield with the manufacturers name or U.S. registered trademark, country oforigin, all stainless and the pipe size for which it is designed. Marking shall be visible after installation.Pipe Size, In. Dimensions, in.P C L W112 0.813 .25 6.688 Ref. 7.37 min 3.000 .0152
47、 0.813 .25 8.188 Ref. 8.87 min 3.000 .0153 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
48、.01512 3.500 .50 39.100 Ref. 42.30 min 5.500 .01515 3.500 .50 49.200 Ref. 52.40 min 5.500 .015NOTE 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 heig
49、ht is to be measured with a caliper or a disc micrometer. The material 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)FIG. 24 Deflection TestFIG. 35 Shear TestC1540 1458.2 Gasket markings shall conform to Specification C564.8.3 The product shall also have any other markings required by law and shall have the option to include this designation(Specification C1540).
