1、Designation: C1541 12 (Reapproved 2017)Standard Specification forShielded Transition Couplings Using Flexible PolyvinylChloride (PVC) Gaskets to Connect Dissimilar DWV Pipeand Fittings1This standard is issued under the fixed designation C1541; the number immediately following the designation indicat
2、es 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 performance of
3、shieldedtransition couplings 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
4、 SI units that are provided for 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 spec
5、ification. 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, health, andenvironmental practices and determine the applicability ofregulatory limitations prior to u
6、se.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers
7、 to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A493 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), Sewe
8、r, Sanitary,and Storm Plumbing Systems3. Terminology3.1 Definitions:3.1.1 Definitions 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
9、the gasket intended to limit the insertiondepth of the pipe to be coupled.3.2.2 clamp 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, npipe and fittingsmade of different materials or different outside diamet
10、ers, orboth.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 joint, nthe point of assembly consisting of thecoupling and the joined pipes or fittings, or both.3.2.8 shield, nan external metallic protective
11、 device de-signed to protect the sealing gasket from external elements thatcould cause failure of the sealing assembly.4. Materials and Manufacture4.1 Physical properties of flexible PVC (polyvinyl chloride)gaskets shall comply with Specification D5926. The gasketsshall be permitted to be spliced or
12、 molded.4.2 All steel parts shall be 300 series stainless steel meetingthe requirements of Specification A493, excluding copper-bearing alloys.5. Requirements5.1 Couplings shall be supported with suitable hangers orsupport necessary to support the pipe, fitting, and contents. Thesupport must be loca
13、ted within 18 in. of the center of thecoupling.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 Oct. 1, 2017. Published October 201
14、7. Originallyapproved in 2002. Last previous edition approved in 2012 as C1541 12. DOI:10.1520/C1541-12R17.2For 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 stand
15、ards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Deci
16、sion on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.15.2 The coupling shall not be installed in a location wherethe expected internal or external temperatures are below 30 F(34
17、 C) or exceed 130 F (54 C).5.3 Couplings shall not be installed in construction that hasa fire rating that restricts the use of flammable materialsthrough penetrations or plenums without additional fire-resistive protection.6. Elastomeric Gasket Requirements6.1 The elastomeric gasket shall consist o
18、f 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 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,shoul
19、der, 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
20、 Stainless steel tension bands shall be tested to withstand125 % of the manufacturers installation torque or a minimumof 60 in.-lbf of applied torque, whichever is greater withoutvisible signs of failure. The band shall be tested over a steelmandrel of the appropriate coupling diameter and torque as
21、required.7.2 Clamp assembly screws or bolts shall not have screw-driver slots.8. Coupling Requirements and Test Methods8.1 Assemble each coupling tested in accordance with themanufacturers instructions between two sections of randomlyselected pipe manufactured to appropriate standards for thetype of
22、 pipe the couplings are expected to join. The pipesection will not exceed a length of 20 ft (6.1 m). Conduct thefollowing tests:8.2 Deflection TestEach coupling tested shall be mountedbetween two pieces of pipe as provided in 8.1. The outboundends of the pipe shall be closed with test plugs. The ass
23、emblyshall be filled with water, all air expelled, and hydrostaticallypressurized to 4.3 psi (29.6 kPa) for the duration of the test.One pipe shall be rigidly supported, and while the assembly isunder pressure, the opposite end of the other pipe shall beraised12 in. (12.7 mm) per linear foot of pipe
24、. The pressureshall be maintained for 15 min and leakage shall not bepermitted. A test apparatus such as the one shown in Fig. 1 issuggested.8.3 Shear TestThe assembly shall be filled with water, allair expelled, and hydrostatically pressurized to 4.3 psi(29.6 kPa) for the duration of the test. Two
25、joined lengths ofpipe selected as provided in 8.1 shall be supported on blocks atthree locations. One length shall be supported on two blocks,one near the uncoupled end and the other immediately adjacentto the coupling. This length shall be firmly restrained inposition (refer to Fig. 2). The other c
26、oupled length shall be aminimum of 5 ft. (1.52 m) in length and supported by a singleblock 6 in. from (152.4 mm) the end of the pipe.Aload of 50 lb(22.7 kg) per inch of nominal diameter shall be applied at apoint 6 in. (152.4 mm) from the edge of the coupling upon a12-in. (304.8-mm) length of 3 by 3
27、 (76.2 by 76.2 mm) angleiron or load distributing pad located on the top of the pipeimmediately adjacent to the coupling of the pipe having onesupport only. When testing reducing couplings the load shall beapplied to the reduced size. Under this loading there shall be novisible leakage or displaceme
28、nt of more than38 in. (9.5 mm)from true alignment when an internal pressure equivalent to a10-ft (3-m) head of water 4.3 psi (29.6 kPa) is applied. Theload and internal pressure shall be maintained for 15 min andleakage shall not be permitted.8.4 Unrestrained Hydrostatic Joint Test:8.4.1 Each coupli
29、ng tested shall be assembled in accordancewith the manufacturers instructions between two sections ofmachined steel pipe and conduct the unrestrained hydrostaticjoint test.8.4.2 The plain ends of the pipe to be used shall bemachined to the correct nominal outside diameter of the typesof pipe for whi
30、ch the coupling is intended to join. Plain endsshall have 0.015-in. (2-mm) deep grooves machined circum-ferentially around them at 0.125-in. (3.2-mm) intervals downthe pipe section for a distance equal to that covered by theelastomeric sleeve. The tool used to machine the grooves shallhave a 60 incl
31、uded angle and shall cut into the pipe from aperpendicular position. The surface between the grooves shallbe a lathe-turned surface of 125 RMS. The plain ends of thepipe are to be uncoated and shall be cleaned with acetone andthoroughly dried before each assembly.8.4.3 Fill the pipe assembly with wa
32、ter, expelling all air andincrease the hydrostatic pressure at a rate of 1 psi (6.9 kPa)every 30 s to the target test pressure shown in Table 1. Whenthe target pressure is reached, it shall be held for 5 min. Anyleakage or axial joint movement of more than 0.150 in.(3.8 mm) shall mean failure.8.4.4
33、The pipe assemblies are to be supported in a mannerthat does not restrain joint movement as shown in Fig. 3.9. Markings and Identification9.1 Each gasket shall be permanently marked with themanufacturers name or US registered trademark, country oforigin, pipe size for which it is designed, and the d
34、esignationSpecification D5926.9.2 Each coupling shall be labeled as to the size(s),material(s), class for which it is intended, operating tempera-ture range, and the ASTM designation showing compliance tothis standard. The marking shall be visible after installation.TABLE 1 Unrestrained Hydrostatic
35、Joint TestPipe Size Test Pressure112 to 5 in. (38 to 76 mm) 20 psi (138 kPa)6 in. (152.4 mm) 18 psi (124 kPa)8 in. (203.2 mm) 10 psi (69 kPa)10 in. (254 mm) 6 psi (41.4 kPa)C1541 12 (2017)2FIG. 1 Deflection TestFIG. 2 Shear Testing ApparatusC1541 12 (2017)3FIG. 3 Unrestrained Hydrostatic Joint Testi
36、ng ApparatusC1541 12 (2017)4ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infr
37、ingement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standa
38、rd or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your vie
39、ws known to the ASTM Committee on Standards, 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 contacti
40、ng ASTM at the aboveaddress or at 610-832-9585 (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:/ 12 (2017)5
