1、Designation: F 438 04An American National StandardStandard Specification forSocket-Type Chlorinated Poly(Vinyl Chloride) (CPVC) PlasticPipe Fittings, Schedule 401This standard is issued under the fixed designation F 438; 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 (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defens
3、e.1. Scope1.1 This specification covers chlorinated poly(vinyl chlo-ride) (CPVC) Schedule 40 socket-type pipe fittings. Includedare requirements for materials, workmanship, dimensions, andburst pressure.NOTE 1The CPVC fittings covered by this standard were coveredpreviously in Specification D 2466.1
4、.2 The products covered by this specification are intendedfor 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, someman
5、ufacturers do not allow pneumatic testing of their products.Consult with specific product/component manufacturers fortheir specific testing procedures prior to pneumatic testing.NOTE 2Pressurized (compressed) air or other compressed gasescontain large amounts of stored energy, which present serious
6、safetyhazards should a system fail for any reason.1.3 The text of this specification references notes, footnotes,and appendixes which provide explanatory material. Thesenotes and footnotes (excluding those in tables and figures) shallnot be considered as requirements of the specification.1.4 The val
7、ues stated in inch-pound units are to be regardedas the standard. The values in parentheses are given forinformation only.1.5 The following safety hazards caveat pertains only to thetest method portion, Section 8, of this specification: Thisstandard does not purport to address all of the safety conc
8、erns,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 limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2D 618 Practice for Conditioning Plastics f
9、or TestingD 1599 Test Method for Resistance to Short-Time Hydrau-lic Failure Pressure of Plastic Pipe, Tubing, and FittingsD 1600 Terminology for Abbreviated Terms Relating toPlasticsD 1784 Specification for Rigid Poly(Vinyl Chloride) (PVC)Compounds and Chlorinated Poly(Vinyl Chloride)(CPVC) Compoun
10、dsD 2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD 2466 Specification for Poly(Vinyl Chloride) (PVC) Plas-tic Pipe Fittings, Schedule 40D 2749 Symbols for Dimensions of Plastic Pipe FittingsF 412 Terminology Relating to Plastic Piping SystemsF 1498 Specification for
11、 Taper Pipe Threads 60 for Ther-moplastic Pipe and Fittings2.2 Federal Standard:3Fed. Std. No. 123 Marking for Shipment (Civil Agencies)2.3 Military Standard:4MIL-STD-129 Marking for Shipment and Storage2.4 NSF Standard:4Standard No. 14 for Plastic Piping Components and RelatedMaterialsStandard No.
12、61 for Drinking Water SystemsComponentsHealth Effects3. Terminology3.1 Definitions:1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.10 on Fittings.Current edition approved April 1, 2004. Published May 20
13、04. Originallyapproved in 1974. Last previous edition approved in 2002 as F 438 02e1.2For 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
14、page onthe ASTM website.3Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.4Available from the National Sanitation Foundation, P.O. Box 1468, Ann Arbor,MI 48106.1Copyright ASTM International, 100 Barr Harbor Drive, PO Bo
15、x C700, West Conshohocken, PA 19428-2959, United States.3.1.1 Definitions are in accordance with Terminology F 412and abbreviations are in accordance with Terminology D 1600,unless otherwise indicated. The abbreviation for chlorinatedpoly(vinyl chloride) is CPVC.4. Classification4.1 GeneralThis spec
16、ification covers Schedule 40 CPVCpipe fittings, socket-type, intended for use with Iron Pipe Size(IPS) outside-diameter plastic pipe.4.1.1 Fittings covered by this specification are normallymolded. In-line fittings, such as couplings, unions, bushings,caps, nipples, and the like, shall be molded or
17、machined fromextruded stock.4.1.2 Fittings fabricated by backwelding are not included inthis specification.5. Materials and Manufacture5.1 This specification covers CPVC pipe fittings made fromcompounds meeting the requirements of Class 23447 asdefined in Specification D 1784.NOTE 3Mechanical streng
18、th, heat resistance, flammability, andchemical resistance requirements are covered in Specification D 1784.5.2 Rework MaterialThe manufacturers shall use onlytheir own clean rework fitting material and the fittings pro-duced shall meet all the requirements of this specification.6. Requirements Requi
19、rements6.1 Dimensions and Tolerances:6.1.1 Fitting sockets, inside diameters (waterways), mini-mum wall thicknesses, and dimensions shall be as shown inTables 1-3 and when measured in accordance with Test MethodD 2122.6.1.2 When multistep reducer bushings are cored out, theinner socket shall be rein
20、forced from the outer wall by aminimum of three ribs extending from the top of the innersocket in the deepest extremity of the coring. The transitionfromDtoDJ(Table 3) shall be straight, tapered as shown, orradiused. A positive taper in the same direction of the taper inthe socket on the outside dia
21、meter of the bushing is optional.6.1.3 The maximum angular variation of any opening shallbe not more than12 off the true centerline axis.6.1.4 The minimum wall thickness of fittings shall be 125 %of the minimum wall thickness of the corresponding size ofSchedule 40 pipe for which they are designed t
22、o be used,except that for the socket, the wall thickness shall be at leastequal to the minimum wall thickness of the corresponding sizeof Schedule 40 pipe. For any threaded transition fitting, theminimum wall thickness of the threaded portion shall be atleast equal to the thickness of material under
23、 the thread root ofthreaded Schedule 80 pipe of the same size.6.1.5 The minimum inside diameter of the fittings shall benot less than the minimum specified inside diameter of thecorresponding size of Schedule 40 pipe. Any fitting having amale thread shall have an internal diameter not larger thanSch
24、edule 80 pipe of the same size.6.1.6 Minimum dimensions have zero negative tolerance.Tolerances on other dimensions are shown in Table 1 and Table3.6.2 ThreadsFor all fittings having taper pipe threads,threads shall conform to Specification F 1498 and be gaged inaccordance with 8.4.6.3 Burst Pressur
25、e:6.3.1 The minimum burst strength of the fittings shall be notless than that calculated for the size and wall thickness of thepipe with which it is to be used, when calculated from thefollowing equation:S 5 P DO2 t!/2twhere:S = hoop stress, psi (or MPa),P = internal pressure, psi (or MPa),DO= avera
26、ge outside diameter, in. (or mm), andt = minimum wall thickness, in. (or mm).Fittings tested in accordance with 8.5 shall withstand theminimum burst pressure shown in Table 4.6.3.2 Pressures shown are minimum burst pressures and donot imply rated working pressures. The burst pressure shall beused on
27、ly as an indication of quality.7. Workmanship, Finish, and Appearance7.1 The fittings shall be homogeneous throughout and freeof cracks, holes, foreign inclusions, or other defects. Thefittings shall be as uniform as commercially practicable incolor, opacity, density, and other physical properties.8
28、. Test Methods8.1 ConditioningCondition the test specimens at 73.4 63.6F (23 6 2C) and 50 6 5 % relative humidity for not lessthan 40 h prior to test in accordance with Procedure A ofPractice D 618, for those tests where conditioning is required.8.2 Test ConditionsConduct tests in the Standard Labor
29、a-tory Atmosphere of 73.4 6 3.6F (23 6 2C) and 50 6 5%relative humidity, unless otherwise specified in the test meth-ods or in this specification.8.3 SamplingA sufficient quantity of fittings as agreedupon between the seller and the purchaser shall be selected atrandom from each lot or shipment and
30、tested to determine thatthe basic design is in conformance with this specification.NOTE 4For individual orders or specifications where supplementaltests are required, only those tests and numbers of tests specifically agreedupon between the purchaser and the seller need be conducted.8.4 ThreadsAll t
31、aper pipe threads shall be gaged inaccordance with Specification F 1498.8.5 Burst PressureDetermine the minimum burst pressurein accordance with Test Method D 1599. The time of testingeach specimen shall be between 60 and 70 s.8.5.1 ApparatusFittings shall be tested while held in a testjig construct
32、ed in such a manner as to seal the socket by meansof O-rings, or gaskets, but not to reinforce or support thefittings, except where contact is necessary because of the shapeof the fitting to keep the fitting in the test jig. Such contact shallbe held to the minimum. The socket plug portion of the te
33、stfixture must extend one third to two thirds of the socket depth.Failure of any part of the test apparatus does not constitutefailure of the fittings.F438042TABLE1TaperedSocketsforCPVCPipeFittings,Schedule40,in.(mm)ANominalPipe SizeASocketEntranceDiameterBSocketBottomDiameterCBSocketminin.(mm)DCIns
34、ideDiameter,minin.(mm)WallThickness,minOutsideDiameterofHub,M,minEntrance,minDiameterin.(mm)ToleranceonDiameterin.(mm)MaximumOut-of-Roundin.(mm)Diameterin.(mm)ToleranceonDiameterin.(mm)MaximumOut-of-Roundin.(mm)Ein.(mm)Fin.(mm)EWin.(mm)EX,EZin.(mm)140.552(14.02)60.004(0.10)0.016(0.41)0.536(13.6)60.0
35、04(0.10)0.016(0.41)0.500(12.70)0.320(8.13)0.088(2.23)0.110(2.79)0.672164(0.40)164(0.40)380.687(17.45)60.004(0.10)0.016(0.41)0.671(17.04)60.004(0.10)0.016(0.41)0.594(15.08)0.449(11.40)0.091(2.31)0.114(2.90)0.821132(0.79)132(0.79)120.848(21.54)60.004(0.10)0.016(0.41)0.836(21.23)60.004(0.10)0.016(0.41)
36、0.688(17.48)0.578(14.68)0.109(2.76)0.136(3.45)0.998132(0.79)132(0.79)341.058(26.87)60.004(0.10)0.020(0.51)1.046(26.57)60.004(0.10)0.020(0.51)0.719(18.26)0.740(18.80)0.113(2.87)0.141(3.58)1.221132(0.79)132(0.79)11.325(33.66)60.005(0.13)0.020(0.51)1.310(33.27)60.005(0.13)0.020(0.51)0.875(22.23)0.990(2
37、5.15)0.133(3.38)0.166(4.22)1.504116(1.59)116(1.59)1141.670(42.42)60.005(0.13)0.024(0.61)1.655(42.04)60.005(0.13)0.024(0.61)0.938(23.83)1.335(33.91)0.140(3.56)0.175(4.45)1.871116(1.59)116(1.59)1121.912(48.56)60.006(0.15)0.024(0.61)1.894(48.10)60.006(0.15)0.024(0.61)1.094(27.79)1.564(39.73)0.145(3.68)
38、0.181(4.60)2.127116(1.59)116(1.59)22.387(60.63)60.006(0.15)0.024(0.61)2.369(60.17)60.006(0.15)0.024(0.61)1.156(29.36)2.021(51.33)0.154(3.91)0.193(4.90)2.634116(1.59)116(1.59)2122.889(73.38)60.007(0.18)0.030(0.76)2.868(72.85)60.007(0.18)0.030(0.76)1.750(44.45)2.414(61.32)0.203(5.16)0.254(6.45)3.17033
39、2(2.38)18(3.18)33.516(89.31)60.008(0.20)0.030(0.76)3.492(88.70)60.008(0.20)0.030(0.76)1.875(47.63)3.008(76.40)0.216(5.49)0.270(6.86)3.841332(2.38)18(3.18)3124.016(102.01)60.008(0.20)0.030(0.76)3.992(101.40)60.008(0.20)0.030(0.76)2.000(50.80)3.486(88.54)0.226(5.74)0.283(7.19)4.374332(2.38)18(3.18)44.
40、518(114.76)60.009(0.23)0.030(0.76)4.491(114.07)60.009(0.23)0.030(0.76)2.000(50.80)3.961(100.61)0.237(6.02)0.296(7.52)4.907332(2.38)18(3.18)55.583(141.81)60.010(0.25)0.060(1.52)5.553(141.05)60.010(0.25)0.060(1.52)3.000(76.20)4.975(126.37)0.258(6.55)0.323(8.20)6.039332(2.38)18(3.18)66.647(168.83)60.01
41、1(0.28)0.060(1.52)6.614(168.00)60.011(0.28)0.060(1.52)3.000(76.20)5.986(152.04)0.280(7.11)0.350(8.89)7.20318(3.18)316(4.76)AThesketchesanddesignsoffittingsareillustrativeonly.BSocketdepth,measuredfromsocketentrancefacetosocketbottomface.CSee6.1.5.F4380439. Retest and Rejection9.1 If the results of a
42、ny test(s) do not meet the requirementsof this specification, the tests(s) shall be conducted again onlyby agreement between the purchaser and seller. Under suchagreement, minimum requirements shall not be lowered,changed, or modified, nor shall specification limits be changed.If upon retest, failur
43、e occurs, the quantity of product repre-sented by the test(s) does not meet the requirements of thisspecification.10. Product Marking10.1 Quality of MarkingThe markings shall be applied tothe fittings in such a manner that they remain legible undernormal handling and installation practices.10.2 Cont
44、ent of Marking:10.2.1 Fittings shall be marked with the following:10.2.1.1 Manufacturers name or trademark,10.2.1.2 Material designation CPVC for CPVC 23447,10.2.1.3 The seal or mark of the laboratory making theevaluation for potable water contact,10.2.1.4 Size, and10.2.1.5 This designation, F 438,
45、with which the fittingcomplies.10.3 Where the size of the fitting does not allow completemarking, omit identification marking in the following se-quence: size, material designation, F 438, manufacturers nameor trademark.10.4 Markings or symbols shall be molded, hot-stamped, orapplied to fittings by
46、any other suitable method, such asprinting.10.5 Where recessed marking is used, care shall be taken tosee that in no case does marking cause cracks or reduce thewall thickness below the minimum specified.11. Quality Assurance11.1 When the product is marked with this designation,F 438, the manufactur
47、er affirms that the product was manufac-tured, inspected, sampled, and tested in accordance with thisspecification and has been found to meet the requirements ofthis specification.12. Keywords12.1 CPVC; fittings; pressure; Sch 40; sockets; threadsTABLE 2 Minimum Dimension from Center to End of Socke
48、ts(Laying Length) for Couplings, Tees, 90 and 45 Elbows, CPVCSocket-Type Pipe Fittings, Schedule 40, in. (mm)ANominal PipeSizeG,minin. (mm)J,minin. (mm)N,minin. (mm)14516 (7.94)532 (3.97)116 (1.59)3838 (9.53)316 (4.76)332 (2.38)1212 (12.70)14 (6.35)332 (2.38)34916 (14.29)516 (7.94)332 (2.38)11116 (1
49、7.46)516 (7.94)332 (2.38)11478 (22.22)38 (9.53)332 (2.38)112 1 (25.40)716 (11.11)332 (2.38)2114 (31.75)58 (15.88)332 (2.38)212 112 (38.10)1116 (17.46)316 (4.76)311316 (46.04)34 (19.05)316 (4.76)312 218 (53.98) 1 (25.40)316 (4.76)42516 (58.74) 1 (25.40)316 (4.76)5 3 (76.20) 138 (34.92)316 (4.76)6312 (88.90) 134 (44.45)14 (6.35)AThe sketches and designs of fittings are illustrative only.F438044TABLE 3 Dimensions of Reducer Bushings, CPVC Socket-Type Pipe Fittings, Schedule 40
