1、Designation: F1970 121An American National StandardStandard Specification forSpecial Engineered Fittings, Appurtenances or Valves foruse in Poly (Vinyl Chloride) (PVC) or Chlorinated Poly (VinylChloride) (CPVC) Systems1This standard is issued under the fixed designation F1970; the number immediately
2、 following the designation indicates 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.1NOTESection 2 was edit
3、orially updated in August 2013.1. Scope*1.1 This specification covers fittings, appurtenances andvalves which are to be used with pipe and tubing complyingwith Specifications D1785, D2241, D2846/D2846M, F441/F441M or F442/F442M, or other piping as specified by thefittings manufacturer. These product
4、s, such as unions, flangesor valves, are not included in the scope of existing ASTMspecifications. This specification includes minimum require-ments for testing, materials, dimensions, workmanship,marking, and in-plant quality control.1.2 Fittings or appurtenances covered by this specificationare ge
5、nerally either molded, fabricated, or assembled frommolded or machined components. The materials used incomponents include rigid thermoplastics, thermoplasticelastomers, elastomerics, and metals. The body or main portionof the fitting, appurtenance or valve is typically PVC, CPVC,PE or PA (nylon). A
6、ll products covered by this standard areintended to be used in PVC or CPVC plastic piping systems, oras a transition from these to metal systems.1.3 The application of these products to gas service isbeyond the scope of this specification.1.4 The products covered by this specification are intendedfo
7、r use with the distribution of pressurized liquids only, whichare chemically compatible with the piping materials. Due toinherent hazards associated with testing components and sys-tems with compressed air or other compressed gases somemanufacturers do not allow pneumatic testing of their products.C
8、onsult with specific product/component manufacturers fortheir specific testing procedures prior to pneumatic testing.NOTE 1Warning: Pressurized (compressed) air or other compressedgases contain large amounts of stored energy which present serious safetywhich present serious safety hazards should a s
9、ystem fail for any reason.1.5 Fittings which rely on heat fusion welding for connec-tion to the piping system are outside the scope of thisspecification.1.6 Check valves (including foot valves) covered by thisspecification shall not be considered backflow preventiondevices and shall not be used for
10、the protection of a potablewater supply. For definitions and requirements of backflowprevention devices, consult model plumbing codes andASSE.21.7 Due to the complex and installation-specific concernssurrounding chemical resistance and corrosion, this specifica-tion does not address the compatibilit
11、y of the products with allpossible end-use environments. Additional testing specific tothe end-use environment is recommended if the system isconveying liquids other than potable water.1.8 The values stated in inch-pound units are to be regardedas the standard. The SI units given in parentheses are
12、given forinformation only.1.9 The following safety caveat applies only to the testmethods and in-plant quality control portions, section of thisspecification: This standard does not purport to address all ofthe safety concerns, if any, associated with its use. It is theresponsibility of the user of
13、this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:3D1598 Test Method for Time-to-Failure of Plastic PipeUnder Constant Internal PressureD1599 Test Method for Resistance
14、 to Short-Time HydraulicPressure of Plastic Pipe, Tubing, and Fittings1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.10Current edition approved Nov. 1, 2012. Published December 2012. Originallyapproved
15、 in 1999. Last previous edition approved in 2005 as F197005. DOI:10.1520/F1970-12.2American Society of Sanitary Engineering, 28901 Clemens Rd., Suite 100,Westlake, OH 44145.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For A
16、nnual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis inter
17、national standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Com
18、mittee.1D1600 Terminology forAbbreviated Terms Relating to Plas-ticsD1784 Specification for Rigid Poly(Vinyl Chloride) (PVC)Compounds and Chlorinated Poly(Vinyl Chloride)(CPVC) CompoundsD1785 Specification for Poly(Vinyl Chloride) (PVC) PlasticPipe, Schedules 40, 80, and 120D1898 Practice for Sampli
19、ng of Plastics (Withdrawn 1998)4D2000 Classification System for Rubber Products in Auto-motive ApplicationsD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD2241 Specification for Poly(Vinyl Chloride) (PVC)Pressure-Rated Pipe (SDR Series)D2466 Specification for Poly(Vi
20、nyl Chloride) (PVC) PlasticPipe Fittings, Schedule 40D2467 Specification for Poly(Vinyl Chloride) (PVC) PlasticPipe Fittings, Schedule 80D2846/D2846M Specification for Chlorinated Poly(VinylChloride) (CPVC) Plastic Hot- and Cold-Water Distribu-tion SystemsF412 Terminology Relating to Plastic Piping
21、SystemsF438 Specification for Socket-Type Chlorinated Poly(VinylChloride) (CPVC) Plastic Pipe Fittings, Schedule 40F439 Specification for Chlorinated Poly (Vinyl Chloride)(CPVC) Plastic Pipe Fittings, Schedule 80F441/F441M Specification for Chlorinated Poly(Vinyl Chlo-ride) (CPVC) Plastic Pipe, Sche
22、dules 40 and 80F442/F442M Specification for Chlorinated Poly(Vinyl Chlo-ride) (CPVC) Plastic Pipe (SDRPR)F477 Specification for Elastomeric Seals (Gaskets) for Join-ing Plastic PipeF1498 Specification for Taper Pipe Threads 60 for Thermo-plastic Pipe and Fittings2.2 ASME Standards:B1.20.1 Pipe Threa
23、ds, General Purpose (Inch)5B16.5 Pipe Flanges and Flanged Fittings52.3 NSF Standards:NSF 14 Plastics Piping Components and Related Materials6NSF 61 Drinking Water System Components - Health Ef-fects62.4 ISA Standard:ISA S75.02 Control Valve Capacity Test Procedure72.5 ASQ Standard:ANSI/ASQ Z1.4 Samp
24、ling Procedures and Tables for In-spection by Attributes83. Terminology3.1 GeneralDefinitions are in accordance with the Defi-nitions in F412 and abbreviations are in accordance withD1600 unless otherwise specified.3.2 Definitions of Terms Specific to This Standard:3.2.1 activation pressurethe activ
25、ation pressure of a checkvalve is that inlet pressure, exceeding the outlet pressure,required to open the check valve and allow water to flow.3.2.2 appurtenancesaccessories of a plastic piping systemdesigned for special applications or end-uses. Appurtenancesmay include, but are not limited to pipes
26、, fittings, valves,storage tanks, mechanical devices and expansion tanks.3.2.3 connectionsthe portion of the fitting intended to jointhe fitting with the rest of the piping system (see 5.1).3.2.4 CTSabbreviation for “copper tube size”, indicatingan outside-diameter controlled tubing with outside dia
27、meterdimensions meeting the tube specifications given in Specifica-tion D2846/D2846M.3.2.5 IPSabbreviation for “iron pipe size”, indicating anoutside-diameter controlled tubing with outside diameter di-mensions meeting the requirements of schedule 40 pipe (seeSpecification D1785 for dimensions of sc
28、hedule 40 pipe).3.2.6 lot sizethe total number of completely finishedfittings or appurtenances that are manufactured under condi-tions of production that are considered uniform.3.2.7 referee testtesting conducted to compare perfor-mance of the product against all requirements of this specifi-cation.
29、 In-plant QC testing is not considered referee testing.4. Materials and Manufacture4.1 The elastomeric seals designed for push-on joints,which require no internal or external pressure to effect theinitial seal, shall comply with the requirements of SpecificationF477, Table 1 for thermoset, Table 2 f
30、or thermoplastic.4.2 All other elastomeric seals shall be designed to meet theproduct performance requirements stated within this documentand be specified in accordance with Classification D2000.4.3 Materials used in components which provide structuralintegrity of the fitting or appurtenance shall m
31、eet the require-ments of 4.3.1, 4.3.2,or4.4.NOTE 2Components which provide structural integrity include thebody; connections such as sockets, compression joint components,saddles, and flanges.4.3.1 PVC materials shall meet the minimum requirementsfor a cell-classification of 12454, 13354, 11443 or 1
32、4333 asdefined by Specification D1784.4.3.2 CPVC materials shall meet the minimum require-ments for a cell-classification of 23447 or 23448 as defined inSpecification D1784.4.4 Rework Material The manufacturers shall use onlytheir own clean rework fitting material and the fittings pro-duced shall me
33、et the requirements of this specification. Mate-rials containing contaminants from other base materials orelastomerics shall not be used in the manufacture of fittings orappurtenances under this specification.4The last approved version of this historical standard is referenced onwww.astm.org.5Availa
34、ble from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990.6NSF International, P.O. Box 130140, Ann Arbor, MI 48113-0140.7Instrument Society of America, 67 Alexander Drive, Research Triangle Park,NC 27709.8American Society for Q
35、uality, 611 East Wisconsin Ave., Milwaukee, WI53201-3005.F1970 12125. Requirements5.1 Dimensions:5.1.1 Seal Dimensions Seal dimensions shall be in accor-dance with the manufacturers standard design dimensions andtolerances. The seal shall be designed to provide an adequatecompressive force against t
36、he mating parts after assembly toeffect a positive seal under all combinations of permitted fittingand seal tolerances.5.1.2 Solvent-Weld ConnectionsSockets shall complywith the fittings dimensions applicable to the size of pipe beingjoined. Dimensioning of sockets shall be conducted in accor-dance
37、with 8.2.5.1.2.1 Socket connections for solvent-weld to IPS pipeshall comply with the socket dimensions given in SpecificationD2467 for Sch 80 PVC, Specification D2466 for Sch 40 PVC,Specification F439 for Sch 80 CPVC or Specification F438 forSch 40 CPVC.5.1.2.2 Socket connections for solvent-weld t
38、o CTS pipeshall comply with the socket dimensions given in D2846/D2846M.5.1.3 Threaded ConnectionsFor all thermoplastic compo-nents having taper pipe threads, thermoplastic threads shallconform to Specification F1498 and be gaged in accordancewith 8.2.2. The tolerance on thermoplastic threads, whenm
39、easured using gages, shall be 61.5 turns. For all metalliccomponents having taper pipe threads, threads shall conform toANSI/ASME B1.20.1. The tolerance on metallic threads whenmeasured using gages shall be 61 turn.5.1.4 Flange ConnectionsFlanges and flange-connectionson assemblies shall meet the bo
40、lt-pattern requirements ofANSI/ASME B16.5.5.1.5 Spigot ConnectionsSpigot ends of fittings shall meetthe requirements for average outside diameter, out-of-roundness and minimum wall thickness of the correspondingpipe.5.1.6 Other dimensions shall be in accordance with themanufacturers standard dimensi
41、ons and tolerances.5.2 Internal Pressure TestsFittings shall meet the mini-mum requirements for resistance to hydrostatic pressure whentested in accordance with 8.2.5.2.1 ValvesValves shall be tested in both the open (shelltest) and shut-off (seat test) configurations for compliance withthis section
42、. Valves without a specified flow direction shall betested in shut-off position from each possible flow direction.For operating (test) temperatures above 145F (63C), the1000-h test on the valves shall be conducted only in the open(shell test) configuration.5.2.2 Blind Flanges Blind flanges shall be
43、tested inaddition to any other flange configurations for compliance withthis section.5.3 Valves and Check Valves:5.3.1 Pressure Drop Across Valves and Check ValvesWhen tested in accordance with 8.4, the pressure drop acrossthe valve shall not exceed the manufacturers published valuesat 25, 50, 75 an
44、d 100 % of maximum flow. The maximum flowrate shall be either as specified by the manufacturer, or the flowachieved with 80 psig (550 kPa) inlet (at no flow condition)pressure and pipe of the same nominal size as the valve. Forvalves with more than one flow direction, testing shall beconducted in ea
45、ch flow configuration.5.3.2 Leakage Through Reverse Direction of ValvesThisrequirement is applicable to valves with a specified flowdirection, and check valves. The reverse flow rate (leakage, L)through the valve shall not exceed 0.01 % of the flow thatwould exist if the valve were not installed (F)
46、, when tested inaccordance with 8.5. That is, L shall be less than or equal to0.0001(F), or alternatively, the leakage percentage, P, shall beless than or equal to 0.01 %.5.3.3 Activation Pressure of Check ValvesThe activationpressure of check valves shall be within6 5%or6 2 in. (mm)water column of
47、the manufacturers published value, which-ever is greater, when tested in accordance with 8.6.5.4 Joint Tightness Fittings utilizing push-on joints withelastomeric seals shall not leak or fail when tested in accor-dance with 8.3.6. Workmanship, Finish, and Appearance6.1 The requirements of this secti
48、on are verified by visual(non-magnified) inspection of the components and surfaces.6.2 All surfaces of the fitting or assembly against which aseal may rest shall be free of imperfections that could adverselyaffect the performance of the fitting or assembly.6.3 The surfaces of all thermoplastic and m
49、etallic compo-nents shall be free from defects which will adversely affect theperformance and service of the fitting or assembly.6.4 The thermoplastic materials, after molding orfabrication, shall be as uniform as commercially practical incolor and opacity.7. Sample Conditioning7.1 For referee testing, all samples shall be conditioned at73 6 3.6F (23 6 2C) for not less than 40 hours immediatelypreceding testing.7.2 For in-plant quality control testing purposes, samplesshall be conditioned at ambient temperature.8. Test Methods8.1 Dimensioning:8.1.
