1、Designation:C154112Standard Specification forShielded Transition Couplings Using Flexible Poly VinylChloride(PVC)Gaskets to Connect Dissimilar DWV Pipeand Fittings1This standard is issued under the fixed designation C1541;the number immediately following the designation indicates the year oforiginal
2、 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 performance of shieldedtransition couplings
3、using flexible PVC gaskets to join dissimi-lar DWV pipe and fittings above and below ground up to andincluding 10-in.pipe and fittings.1.2 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
4、 information onlyand are not considered standard.1.3 The committee with jurisdiction over this standard is notaware of any comparable standards of any other organization.1.4 The following precaution pertains only to the testmethod portion,Sections 7 and 8 of this specification.Thisstandard does not
5、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 require-ments prior to use.2.Referenced Documents2.1 ASTM Standards:2A49
6、3 Specification for Stainless Steel Wire and Wire Rodsfor Cold Heading and Cold ForgingA644 Terminology Relating to Iron CastingsD5926 Specification for Poly(Vinyl Chloride)(PVC)Gas-kets for Drain,Waste,and Vent(DWV),Sewer,Sanitary,and Storm Plumbing Systems3.Terminology3.1 Definitions:3.1.1 Definit
7、ions of the following terms used in this speci-fication are found in Terminology A644.3.2 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 to be coupled.3.2.2 cl
8、amp assembly,nthat portion of the coupling ex-cluding the gasket.3.2.3 coupling,nthe complete assembly.3.2.4 dissimilar DWV pipe and fittings,n pipe and fittingsmade of different materials or different outside diameters,orboth.3.2.5 fitting,nparts of a pipeline other than straight pipes,valves,or co
9、uplings.3.2.6 gasket,nthe elastomeric portion of the coupling.3.2.7 joint,nthe point of assembly consisting of thecoupling and the joined pipes or fittings,or both.3.2.8 shield,nan external metallic protective device de-signed to protect the sealing gasket from external elements thatcould cause fail
10、ure of the sealing assembly.4.Materials and Manufacture4.1 Physical properties of Flexible PVC(Poly Vinyl Chlo-ride)gaskets shall comply with Specification D5926.Thegaskets shall be permitted to be spliced or molded.4.2 All steel parts shall be 300 series stainless steel meetingthe requirements of S
11、pecification A493 excluding copperbearing alloys.5.Requirements5.1 Couplings shall be supported with suitable hangers orsupport necessary to support the pipe,fitting,and contents.Thesupport must be located within 18 in.of the center of thecoupling.5.2 The coupling shall not be installed in a locatio
12、n wherethe expected internal or external temperatures are below-30F(-34C)or exceed 130F(54C).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 editio
13、n approved Dec.1,2012.Published January 2013.Originallyapproved in 2002.Last previous edition approved in 2008 as C1541-08.DOI:10.1520/C1541-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volum
14、e information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.3 Couplings shall not be installed in construction that hasa fire rating that restricts the use of flammable m
15、aterialsthrough penetrations or plenums without additional fire-resistive protection.6.Elastomeric Gasket Requirements6.1 The elastomeric gasket shall consist of one piece con-forming to the physical requirements of 4.1.6.2 The elastomeric gasket shall have an inside centerstop-ring spaced an equal
16、distance from the ends to serve as astop between the pipe/fitting ends.The center stop ring shallnot create an enlargement chamber or recess with a ledge,shoulder or reduction of pipe area or offer an obstruction toflow.A gasket without an inside center stop shall be permittedin tubular transition applications.6.3 The elastomeric gasket shall be free from imperfectionsand porosity that affects its use and serviceability.7.Clamp Assembly Requirements7.1 Stainless steel tension bands shall be test
