1、Designation: C1460 12C1460 17Standard Specification forShielded Transition Couplings for Use Withwith DissimilarDWV Pipe and Fittings Above Ground1This standard is issued under the fixed designation C1460; the number immediately following the designation indicates the year oforiginal adoption or, in
2、 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 performance of shielded transition couplings to join
3、dissimilar DWV pipe and fittings aboveground up to and including 10 in. 10-in. pipe and fittings.1.2 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 consid
4、ered standard.1.3 The committee with jurisdiction over this standard is not aware of any comparable standards published by otherorganizations.1.4 The following precaution comment pertains only to the test method portion, Section 7, of this specification. This standarddoes not purport to address all
5、of the safety concerns, if any, associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety safety, health, and healthenvironmental practices and determine the applicability ofregulatory limitations prior to use.1.4 The committee with jurisdiction ov
6、er this standard is not aware of any comparable standards published by otherorganizations.1.5 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards,
7、 Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A493 Specification for Stainless Steel Wire and Wire Rods for Cold Heading and Cold ForgingA644 Terminology Relating to Iron CastingsC564 Specifica
8、tion for Rubber Gaskets for Cast Iron Soil Pipe and Fittings3. Terminology3.1 DefinitionsThe following definitions used in this specification are found in Terminology A644: elastomeric,thermoset, andthermoplasticthermoplastic.3.2 Definitions of Terms Specific to This Standard:3.2.1 center stop, nan
9、integral part of the gasket centered on the 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 dissimilar DWV pipe and fittings, npipe and fitt
10、ings made of different materials or different outside diameters, or both.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.1 This specification is under the jurisdiction of ASTM Committee A04 on Iron Castings.Cu
11、rrent edition approved Dec. 1, 2012Nov. 15, 2017. Published December 2012November 2017. Originally approved in 2000. Last previous edition approved in 20082012as C1460 - 08.C1460 12. DOI: 10.1520/C1460-12.10.1520/C1460-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contac
12、tASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been
13、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 standard as published by ASTM is to be considered the official document.C
14、opyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.2.7 joint, nthe point of assembly consisting of the coupling and the joined pipes or fittings, or both.3.2.8 shield, nan external metallic protective device designed to protect the seal
15、ing gasket from external elements that couldcause failure of the sealing assembly.4. Materials and Manufacture4.1 Physical properties of gaskets shall be in accordance with Table 1 of Specification C564, using the Durometerdurometerhardness column as specified by the manufacturer.4.2 All steel parts
16、 made from round stock shall be 300 series stainless steel and shall conform to the requirements ofSpecification A493 (excluding copper bearing alloys).5. Elastomeric Gasket Requirements5.1 The elastomeric gasket shall consist of one piece in accordance with the physical requirements of 4.15.1.1 The
17、 elastomeric gasket shall have an inside center stop-ring spaced equal distance from the ends to serve as a stop betweenthe pipe/fitting ends that does not create an enlargement chamber or recess with a ledge, shoulder, or reduction of pipe area or offeran obstruction to flow. A gasket without an in
18、side center stop shall be permitted where telescoping of the piping is necessary.5.1.2 The elastomeric gasket shall be free of defects that affect the use and performance.6. Clamp Assembly Requirements6.1 Clamp assemblies shall be tested to withstand no less than 125 % of the manufacturer stated ins
19、tallation torque60manufacturer-stated installation torque, 60 lb lb/in. in. minimum (6.78 N-m) of applied torque, whichever is greater, withoutvisible signs of failure. The clamp assembly shall be tested over a steel mandrel sized within the range of the clamp and torquedas required.6.2 Clamp assemb
20、ly screws or bolts shall not have screwdriver slots.7. Coupling Requirements and Test Methods7.1 Assemble each coupling tested in accordance with the manufacturers instructions between two sections of randomlyselected pipe not to exceed 20 ft in length manufactured to appropriate standards for the t
21、ype of pipe the couplings are expectedto join, and conduct the following tests:7.1.1 Deflection TestMount each coupling tested between two pieces of pipe as provided in 7.1. Close the out bound outboundends of the pipe with test plugs. Fill the assembly with water, expel all air, and hydrostatically
22、 pressurize to 4.3 psi for the durationof the test. Rigidly support one pipe while the assembly is under pressure, raise the opposite end of the other pipe one-half inchper lineal foot of pipe. Maintain the pressure for 5 min and do not permit leakage. A test apparatus such as the one shown in Fig.1
23、 is suggested.7.1.2 Shear TestFill the assembly with water, expel all air, and hydrostatically pressurize to 4.3 psi for the duration of the test.Support two joined lengths of pipe selected in accordance with 7.1 on blocks at three locations. Support one length on blocks, onenear the uncoupled end,
24、and the other immediately adjacent to the couplings. Firmly restrain this length in position (see Fig. 2).The other coupled length shall be a minimum of 5 ft. 5 ft. (1.52 m) in length and supported by a single block 6 in. (152.4 mm)from the end of the pipe.Apply a load of 50 lb/in. of nominal diamet
25、er at a point 6 in. from the edge of the coupling upon a 12-in.length of (3 by 3) angle iron or load distributing pad located on the top of the pipe immediately adjacent to the coupling of thepipe having one support only. When testing reducing couplings, apply the load to the reduced size. Under thi
26、s loading there shallbe no visible leakage displacement of more than 38 in. from true alignment when an internal pressure equivalent to a 10-ft headof water (4.3 psi) is applied. Maintain the load and internal pressure 15 min and do not permit leakage.7.2 Unrestrained Hydrostatic Joint Test:FIG. 1 D
27、eflection TestC1460 1727.2.1 Each coupling tested shall be assembled in accordance with the manufacturers instructions between two sections ofmachined steel pipe and conduct the unrestrained hydrostatic joint test.7.2.2 The plain ends of the pipe to be used shall be machined to the correct nominal o
28、utside diameter of the types of pipe forwhich the coupling is intended to join. Plain ends shall have 0.015 in. (2 mm) 0.015-in. (2-mm) deep grooves machinedcircumferentially around them at 0.125 in. (3.2 mm) 0.125-in. (3.2-mm) intervals down the pipe section for a distance equal to thatcovered by t
29、he elastomeric sleeve. The tool used to machine the grooves shall have a 60 included angle and shall cut into the pipefrom a perpendicular position. The surface between the grooves shall be a lathe turned lathe-turned surface of 125 RMS. The plainends of the pipe are to be uncoated and shall be clea
30、ned with acetone and thoroughly dried before each assembly.7.2.3 Fill the pipe assembly with water, expelling all air and increase the hydrostatic pressure at a rate of 1 psi (6.9 kPa) every30 s until the target test pressure is reached. The target test pressure shall be 20 psi (138 kPa) for 112 thr
31、ough 5-in. pipe, 18 psi(124 kPa) for 6-in. pipe, 10 psi (69 kPa) for 8-in. pipe, and 6 psi (41.4 kPa) for 10-in. pipe. When the target pressure is reached,it shall be held for 5 min. Any leakage or axial joint movement of more than 0.150 in. (3.8 mm) shall mean failure.7.2.4 Support the pipe assembl
32、ies in a manner that does not restrain joint movement as shown in Fig. 3.8. Markings and Identification8.1 Each gasket shall be permanently marked with the manufacturers name or U.S. registered trademark, country of origin, thepipe size and class for which it is designed, and Specification C564.8.2
33、Each clamp assembly shall be labeled or permanently marked with the manufacturers name or U.S. registered trademark,country or origin, the pipe size, and class for which it is designed, and Specification C1460. The label or marking shall be visibleafter installation.FIG. 2 Shear TestC1460 173ASTM In
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37、andards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 61
38、0-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 3 Unrestrained Hydrostatic Joint Testing ApparatusC1460 174
