1、Designation: F 438 09An 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 () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense
3、.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 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 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, of t
8、his 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 and healthpractices and determine the applicability of regulatory limita-tions prior to use.2.
9、Referenced Documents2.1 ASTM Standards:2D 618 Practice for Conditioning Plastics for TestingD 1599 Test Method for Resistance to Short-Time Hydrau-lic Pressure of Plastic Pipe, Tubing, and FittingsD 1600 Terminology for Abbreviated Terms Relating toPlasticsD 1784 Specification for Rigid Poly(Vinyl C
10、hloride) (PVC)Compounds and Chlorinated Poly(Vinyl Chloride)(CPVC) CompoundsD 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
11、412 Terminology Relating to Plastic Piping SystemsF 1498 Specification for 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:4Stand
12、ard No. 14 for Plastic Piping Components and RelatedMaterialsStandard No. 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 F
13、17.10 on Fittings.Current edition approved Aug. 1, 2009. Published August 2009. Originallyapproved in 1974. Last previous edition approved in 2004 as F 438 04.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of
14、ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3AAvailable from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.4Available from NSF International, P.O. Box 130
15、140, 789 N. Dixboro Rd., AnnArbor, MI 48113-0140, http:/www.nsf.org.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.1 Definitions are in accordance with Terminolog
16、y 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 specification covers Schedule 40 CPVCpipe fittings, socket-type, intended for use with Iron Pipe Size(IPS) outs
17、ide-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 specification.
18、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 1784.NOTE 4Mec
19、hanical strength, 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. Requ
20、irements Requirements6.1 Dimensions and Tolerances:6.1.1 Fitting sockets, inside diameters (waterways), mini-mum wall thicknesses, and dimensions shall be as shown inTables 1-3 and when measured in accordance with Test MethodD 2122.6.1.2 When multistep reducer bushings are cored out, theinner socket
21、 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 t
22、he 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
23、are 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
24、material 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
25、larger 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 F 1498 and be gaged inaccordance with 8.4.6.3
26、 Burst 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
27、MPa),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 s
28、hall 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 physica
29、l properties.8. 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
30、Standard Labora-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
31、 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.
32、4 ThreadsAll taper 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 tes
33、tjig constructed 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 por
34、tion of the testF438092TABLE 1 Tapered Sockets for CPVC Pipe Fittings, Schedule 40, in. (mm)ANominalPipeSizeASocket Entrance DiameterBSocket Bottom DiameterCBSocketminin. (mm)DCInsideDiameter,minin. (mm)Wall Thickness, minOutsideDiameterof Hub,M, minEntrance, minDiameterin. (mm)Toleranceon Diameteri
35、n. (mm)MaximumOut-of-Roundin. (mm)Diameterin. (mm)Toleranceon Diameterin. (mm)MaximumOut-of-Roundin. (mm)Ein. (mm)Fin. (mm)EWin. (mm)EX, EZin. (mm)14 0.552 (14.02) 60.004 (0.10) 0.016 (0.41) 0.536 (13.6) 60.004 (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)1
36、64 (0.40)38 0.687 (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)12 0.848 (21.54) 60.004 (0.10) 0.016 (0.41) 0.836 (21.23) 60.004 (0.10) 0.016 (0.41) 0.688 (17.48) 0.578 (14.68) 0.109 (2.76) 0
37、.136 (3.45) 0.998132 (0.79)132 (0.79)34 1.058 (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)1 1.325 (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
38、.990 (25.15) 0.133 (3.38) 0.166 (4.22) 1.504116 (1.59)116 (1.59)114 1.670 (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)112 1.912 (48.56) 60.006 (0.15) 0.024 (0.61) 1.894 (48.10) 60.006 (0.15
39、) 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)2 2.387 (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)212 2.889 (73.38) 60.007 (0.18) 0.030 (0.76
40、) 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) 3.170332 (2.38)18 (3.18)3 3.516 (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)312 4.016 (102.01
41、) 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)4 4.518 (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 (
42、2.38)18 (3.18)5 5.583 (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)6 6.647 (168.83) 60.011 (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
43、(7.11) 0.350 (8.89) 7.20318 (3.18)316 (4.76)AThe sketches and designs of fittings are illustrative only.BSocket depth, measured from socket entrance face to socket bottom face.CSee 6.1.5.F438093fixture must extend one third to two thirds of the socket depth.Failure of any part of the test apparatus
44、does not constitutefailure of the fittings.9. Retest and Rejection9.1 If the results of any 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 lower
45、ed,changed, or modified, nor shall specification limits be changed.If upon retest, failure 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
46、manner that they remain legible undernormal handling and installation practices.10.2 Content 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 the
47、evaluation for potable water contact,10.2.1.4 Size, and10.2.1.5 This designation, F 438, 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 t
48、rademark.10.4 Markings or symbols shall be molded, hot-stamped, orapplied to fittings by 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. Qua
49、lity Assurance11.1 When the product is marked with this designation,F 438, the manufacturer 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 Sockets(Laying Length) for Couplings, Tees, 90 and 45 Elbows, CPVCSocket-Type Pipe Fittings, Schedule 40, in. (mm)ANominal PipeSizeG,mini
