1、Designation:D285596(Reapproved 2010)Standard Practice forMaking Solvent-Cemented Joints with Poly(Vinyl Chloride)(PVC)Pipe and Fittings1This standard is issued under the fixed designation D2855;the number immediately following the designation indicates the year oforiginal adoption or,in the case of
2、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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This practice des
3、cribes a procedure for making jointswith poly(vinyl chloride)plastic(PVC)pipes,both plain endsand fittings,and bell ends,by means of solvent cements.Theseprocedures are general ones for PVC piping.In non-pressureapplications,simplified procedures may be used.Manufactur-ers should supply specific ins
4、tructions for their particularproducts,if and when it seems necessary.1.2 The techniques covered are applicable only to PVCpipe,both plain and bell-end,and fittings of the same classes asdescribed in Specification D1784.1.3 Pipe and fittings are manufactured within certain toler-ances to provide for
5、 the small variations in the extrusion,belling,and molding processes and are not to exact size.Apartial list of standards for PVC pipe,fittings,and cementssuitable for use in making solvent-cemented joints is given inAppendix X1.1.4 The values stated in inch-pound units are to be regardedas standard
6、.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 The text of this practice references notes and footnotesthat provide explanatory material.These notes and footnotes(excluding those in tables and figures
7、)shall not be consideredas requirements of the practice.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility o
8、f regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D740 Specification for Methyl Ethyl KetoneD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD1784 Specification for Rigid Poly(Vinyl Chloride)(PVC)Compounds and Chlorinated Poly(Vinyl Chloride)(CPVC)CompoundsD2
9、564 Specification for Solvent Cements for Poly(VinylChloride)(PVC)Plastic Piping SystemsF402 Practice for Safe Handling of Solvent Cements,Primers,and Cleaners Used for Joining ThermoplasticPipe and FittingsF412 Terminology Relating to Plastic Piping SystemsF656 Specification for Primers for Use in
10、Solvent CementJoints of Poly(Vinyl Chloride)(PVC)Plastic Pipe andFittings3.Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nology F412,and abbreviations are in accordance with Termi-nology D1600,unless otherwise specified.4.Summary of Practice4.1 To consistently make good joints,t
11、he following shouldbe clearly understood and adhered to:4.1.1 The joining surfaces must be softened(dissolved)andmade semi-fluid.4.1.2 Sufficient cement must be applied to fill the gapbetween pipe and fitting.4.1.3 Assembly of pipe and fittings must be made while thesurfaces are still wet and fluid.
12、1This practice is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.20 on Joining.Current edition approved Feb.1,2010.Published March 2010.Originallyapproved in 1970.Last previous edition approved in 2002 as D2855 96(2002).DOI:
13、10.1520/D2855-96R10.2For 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 standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor D
14、rive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.1.4 Joint strength develops as the cement dries.In the tightpart of the joint the surfaces will tend to fuse together;in theloose part the cement will bond to both surfaces.4.2 Penetration and dissolving can be achieved by thecement i
15、tself,by a suitable primer,or by the use of both primerand cement.A suitable primer will penetrate and dissolve theplastic more quickly than cement alone.In cold weather,moretime and additional applications are required(see Fig.1).4.3 More than sufficient cement to fill the loose part of thejoint mu
16、st be applied(see Fig.2).Besides filling the gap,adequate cement layers will penetrate the surfaces and alsoremain wet until the joint is assembled.4.4 If the cement coatings on the pipe and fittings are wetand fluid when assembly takes place,they will tend to flowtogether and become one cement layer.Also,if the cement iswet the surfaces beneath them will still be soft,and thesedissolved surfaces in the tight part of the joint will tend to fusetogether(see Fig.3).4.5 As the solvent dissipates,th
