1、Designation: F438 17 An American National StandardStandard Specification forSocket-Type Chlorinated Poly(Vinyl Chloride) (CPVC) PlasticPipe Fittings, Schedule 401This standard is issued under the fixed designation F438; the number immediately following the designation indicates the year of originala
2、doption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon () 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 Def
3、ense.1. Scope*1.1 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 D246
4、6.1.2 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, some
5、manufacturers 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 serio
6、us 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
7、values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 The following safety hazards caveat pertains only to thetest method portion, Section 8, o
8、f this specification: 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
9、prior to use.1.6 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 Technic
10、alBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD1599 Test Method for Resistance to Short-Time HydraulicPressure of Plastic Pipe, Tubing, and FittingsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD1784 Sp
11、ecification for Rigid Poly(Vinyl Chloride) (PVC)Compounds and Chlorinated Poly(Vinyl Chloride)(CPVC) CompoundsD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD2466 Specification for Poly(Vinyl Chloride) (PVC) PlasticPipe Fittings, Schedule 40D2749 Symbols for Dimensio
12、ns of Plastic Pipe FittingsF412 Terminology Relating to Plastic Piping SystemsF1498 Specification for Taper Pipe Threads 60 for Thermo-plastic 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 Sto
13、rage2.4 NSF Standard:4Standard No. 14 for Plastic Piping Components and RelatedMaterialsStandard No. 61 for Drinking Water Systems ComponentsHealth Effects1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17
14、.10 on Fittings.Current edition approved Aug. 1, 2017. Published August 2017. Originallyapproved in 1974. Last previous edition approved in 2015 as F438 15. DOI:10.1520/F0438-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org.
15、For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3DLA Document Services Building 4/D 700 Robbins Avenue Philadelphia, PA19111-5094 http:/quicksearch.dla.mil/4Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann
16、Arbor, MI 48113-0140, http:/www.nsf.org.*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 international standard was developed in accordance with internationally recog
17、nized 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) Committee.13. Terminology3.1 Definitions:3.1.1 Definitions are in accordanc
18、e with Terminology F412and abbreviations are in accordance with Terminology D1600,unless otherwise indicated. The abbreviation for chlorinatedpoly(vinyl chloride) is CPVC.4. Classification4.1 GeneralThis specification covers Schedule 40 CPVCpipe fittings, socket-type, intended for use with Iron Pipe
19、 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 machined fromextruded stock.4.1.2 Fittings fabricated by backwelding are not included inthis
20、 specification.NOTE 3This specification does not include requirements for pipe andfittings intended to be used to vent combustion gases.5. Materials and Manufacture5.1 This specification covers CPVC pipe fittings made fromcompounds meeting the requirements of Class 23447 asdefined in Specification D
21、1784.NOTE 4Mechanical strength, heat resistance, flammability, andchemical resistance requirements are covered in Specification D1784.5.2 Rework MaterialThe manufacturers shall use onlytheir own clean rework fitting material and the fittings pro-duced shall meet all the requirements of this specific
22、ation.6. Requirements6.1 Dimensions and Tolerances:6.1.1 Fitting sockets, inside diameters (waterways), mini-mum wall thicknesses, and dimensions shall be as shown inTables 1-4 and when measured in accordance with Test MethodD2122.6.1.2 When multistep reducer bushings are cored out, theinner socket
23、shall be reinforced 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 th
24、e outside diameter 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 a
25、re designed to 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 m
26、aterial under 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 l
27、arger thanSchedule 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 F1498 and be gaged inaccordance with 8.4.6.3 B
28、urst Pressure: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 MP
29、a),DO= average 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 sha
30、ll beused only 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
31、properties.8. Test Methods8.1 ConditioningCondition the test specimens at 73.4 63.6F (23 6 2C) and 50 6 10 % relative humidity for not lessthan 40 h prior to test in accordance with Procedure A ofPractice D618, for those tests where conditioning is required.8.2 Test ConditionsConduct tests in the St
32、andard Labora-tory Atmosphere of 73.4 6 3.6F (23 6 2C) and 50 6 10 %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
33、 shipment and tested to determine thatthe basic design is in conformance with this specification.NOTE 5For 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.
34、4 ThreadsAll taper pipe threads shall be gaged inaccordance with Specification F1498.8.5 Burst PressureDetermine the minimum burst pressurein accordance with Test Method D1599, Procedure B. Thepressure shall be applied at a uniform rate such that theminimum allowable burst pressure is attained in 60
35、 and 70 s.NOTE 6Provided the minimum burst pressure is met or exceededbetween 60 and 70 s, the time-to-failure may exceed 70 s.F438 172TABLE1TaperedSocketsforCPVCPipeFittings,Schedule40,in.(mm)ANominalPipe SizeASocketEntranceDiameterBSocketBottomDiameterCBSocketminin.(mm)DCInsideDiameter,minin.(mm)W
36、allThickness,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)0.004(0.10)0.016(0.41)0.536(13.6)0.004(0.10)0.016(0.41)0.500(
37、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)0.004(0.10)0.016(0.41)0.671(17.04)0.004(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)0.004(0.10)0.016(0.41)0.836(21.23)0.004(0.10)0.016(0.41)0.688(17.48)0.578(14.68)0.109
38、(2.76)0.136(3.45)0.998132(0.79)132(0.79)341.058(26.87)0.004(0.10)0.020(0.51)1.046(26.57)0.004(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)0.005(0.13)0.020(0.51)1.310(33.27)0.005(0.13)0.020(0.51)0.875(22.23)0.990(25.15)0.133(3.38)0.166(4.22)1.5041
39、16(1.59)116(1.59)1141.670(42.42)0.005(0.13)0.024(0.61)1.655(42.04)0.005(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)0.006(0.15)0.024(0.61)1.894(48.10)0.006(0.15)0.024(0.61)1.094(27.79)1.564(39.73)0.145(3.68)0.181(4.60)2.127116(1.59)116(1.59)22.
40、387(60.63)0.006(0.15)0.024(0.61)2.369(60.17)0.006(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)0.007(0.18)0.030(0.76)2.868(72.85)0.007(0.18)0.030(0.76)1.750(44.45)2.414(61.32)0.203(5.16)0.254(6.45)3.170332(2.38)18(3.18)33.516(89.31)0.008(0.20)0.
41、030(0.76)3.492(88.70)0.008(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)0.008(0.20)0.030(0.76)3.992(101.40)0.008(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)44.518(114.76)0.009(0.23)0.030(0.76)4.491(114.07
42、)0.009(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)0.010(0.25)0.060(1.52)5.553(141.05)0.010(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)0.011(0.28)0.060(1.52)6.614(168.00)0.011(0.28)0.060(1.
43、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.F438 1739. Retest and Rejection9.1 If the results of any test(s) do not meet the requirementsof this spe
44、cification, 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, failure occurs, the quantity of product repre-sented by
45、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 Content of Marking:10.2.1 Fittings shall be marked wit
46、h 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, F438, with which the fittingcomplies.10.3 Where the size
47、of the fitting does not allow completemarking, omit identification marking in the following se-quence: size, material designation, F438, manufacturers nameor trademark.10.4 Markings or symbols shall be molded, hot-stamped, orapplied to fittings by any other suitable method, such asprinting.10.5 Wher
48、e 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,F438, the manufacturer affirms that the product wasmanufactured, inspecte
49、d, sampled, and tested in accordancewith this specification and has been found to meet therequirements of this specification.12. Keywords12.1 CPVC; fittings; pressure; Sch 40; sockets; threadsTABLE 2 Minimum Dimension from Center to End of Sockets(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.
