1、Designation: C 1541 04Standard Specification forShielded Transition Couplings Using Flexible Poly VinylChloride (PVC) Gaskets to Connect Dissimilar DWV Pipeand Fittings1This standard is issued under the fixed designation C 1541; the number immediately following the designation indicates the year ofo
2、riginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the performance of shieldedtransi
3、tion 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 the standard. The SI units given in brackets are forinformation only.1.3 The committee
4、 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 purport to address all of the safety concerns,if any, associated
5、 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:2A 493 Specification for Stainless Steel Wire and Wire Rodsfor Co
6、ld Heading and Cold ForgingC 717 Terminology of Building Seals and SealantsD 5926 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 Definitions of the following terms used in this speci-f
7、ication are found in Terminology C 717.3.2 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 clamp assembly, nthat portion of the couplingexc
8、luding 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 diameters, orboth.3.2.5 fitting, nparts of a pipeline other than straight pipes,valves, or couplings.3.2.6 gasket, nthe elastomeric port
9、ion 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 failure of the sealing assembly.4. Material
10、s and Manufacture4.1 Physical properties of Flexible PVC (Poly Vinyl Chlo-ride) gaskets shall comply with Specification D 5926. Thegaskets shall be permitted to be spliced or molded.4.2 All steel parts shall be 300 series stainless steel meetingthe requirements of Specification A 493 excluding coppe
11、rbearing 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 location wherethe expected internal
12、 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 andCouplings for Plumbing and Sewer Piping.Current edition approved February 1, 2004.
13、 Published March 2004. Originallyapproved in 2002. Last previous edition approved in 2002 as C 1541 - 02.2For 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 standar
14、ds Document Summary page onthe ASTM website.TABLE 1 Unrestrained Hydrostatic Joint TestPipe Size Test Pressure112 to 5 in. 38 to 76 mm 20 psi 138 kPa6 in. 152.4 mm 18 psi 124 kPa8 in. 203.2 mm 10 psi 69 kPa10 in. 254 mm 6 psi 41.4 kPa1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700,
15、 West Conshohocken, PA 19428-2959, United States.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
16、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 distance from the ends to serve as astop between the pipe/fitting ends. The center stop ring shallnot create an enlargement chamber or rec
17、ess 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 Ass
18、embly Requirements7.1 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 di
19、ameter and torque asrequired.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 stan
20、dards for thetype of 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 out boundends of the pipe shall be closed with
21、test plugs. The assemblyshall 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 linea
22、r foot of pipe. 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 29.6kPa for the duration of th
23、e test. Two joined lengths of pipeselected as provided in 8.1 shall be supported on blocks at threelocations. One length shall be supported on two blocks, onenear the uncoupled end and the other immediately adjacent tothe coupling. This length shall be firmly restrained in position(refer to Fig. 2).
24、 The other coupled length shall be supported bya single block 6 in. from 152.4 mm the end of the pipe.Aloadof 50 lb 22.7 kg per inch of nominal diameter shall be appliedat a point 6 in. 152.4 mm from the edge of the coupling upona 12 in. 304.8 mm length of 3 by 3 76.2 by 76.2 mm angleiron or load di
25、stributing 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 displacement of more than38 in. 9.5 mmfrom true a
26、lignment when an internal pressure equivalent to aFIG. 1 Deflection TestFIG. 2 Shear Testing ApparatusC154104210 ft 3 m head of water 4.3 psi 29.6 kPa is applied. The loadand internal pressure shall be maintained for 15 min andleakage shall not be permitted.8.4 Unrestrained Hydrostatic Joint Test:8.
27、4.1 Each coupling 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 types
28、of pipe for which 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 shallhav
29、e a 60 included 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 assem
30、bly with water, expelling all air andincrease the hydrostatic pressure at a rate of 1 psi 6.9 kPaevery 30 s to the target test pressure shown in Table 1. Whenthe target pressure is reached, it shall be held for 10 min. Anyleakage or axial joint movement of more than 0.150 in. 3.8mm shall mean failur
31、e.8.4.4 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, a
32、nd the designationSpecification D 5926.9.2 Each coupling shall be labeled as to the size(s), mate-rial(s), class for which it is intended, operating temperaturerange, and the designation ASTM showing compliance to thisstandard. The marking shall be visible after installation.C1541043FIG. 3 Unrestrai
33、ned Hydrostatic Joint Testing ApparatusC1541044ASTM 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,
34、and the riskof infringement 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 revi
35、sion of this standard 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
36、shouldmake your views 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 contacting 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).C1541045
