1、Designation: F438 09F438 15Standard 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 originaladoption or, in the case
2、 of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon () 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. Scope*1.1 This spec
3、ification covers chlorinated poly(vinyl chloride) (CPVC) Schedule 40 socket-type pipe fittings. Included arerequirements for materials, workmanship, dimensions, and burst pressure.NOTE 1The CPVC fittings covered by this standard were covered previously in Specification D2466.1.2 The products covered
4、 by this specification are intended for use with the distribution of pressurized liquids only, which arechemically compatible with the piping materials. Due to inherent hazards associated with testing components and systems withcompressed air or other compressed gases, some manufacturers do not allo
5、w pneumatic testing of their products. Consult withspecific product/component manufacturers for their specific testing procedures prior to pneumatic testing.NOTE 2Pressurized (compressed) air or other compressed gases contain large amounts of stored energy, which present serious safety hazards shoul
6、da system fail for any reason.1.3 The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notesand footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.1.4 The values stated in inch
7、-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.5 The following safety hazards caveat pertains only to the test method portion, Section 8, of this specificati
8、on:This standarddoes not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.2. Referenced Docu
9、ments2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD1599 Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and FittingsD1600 Terminology for Abbreviated Terms Relating to PlasticsD1784 Specification for Rigid Poly(Vinyl Chloride) (PVC) Comp
10、ounds and Chlorinated Poly(Vinyl Chloride) (CPVC)CompoundsD2122 Test Method for Determining Dimensions of Thermoplastic Pipe and FittingsD2466 Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40D2749 Symbols for Dimensions of Plastic Pipe FittingsF412 Terminology Relating
11、 to Plastic Piping SystemsF1498 Specification for Taper Pipe Threads 60 for Thermoplastic 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 Storage1 This specification is under the jurisdiction of
12、 ASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.10 on Fittings.Current edition approved Aug. 1, 2009March 1, 2015. Published August 2009July 2015. Originally approved in 1974. Last previous edition approved in 20042009 asF438 04.F438 09. DOI: 10.152
13、0/F0438-09.10.1520/F0438-15.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 AAvailable from Standardization
14、 Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.DLA Document Services Building 4/D 700 Robbins Avenue Philadelphia, PA 19111-5094 http:/quicksearch.dla.mil/4 Available from NSF International, P.O. Box 130140, 789 N. Dixboro
15、Rd., Ann Arbor, MI 48113-0140, http:/www.nsf.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurat
16、ely, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Dr
17、ive, PO Box C700, West Conshohocken, PA 19428-2959. United States12.4 NSF Standard:4Standard No. 14 for Plastic Piping Components and Related MaterialsStandard No. 61 for Drinking Water Systems ComponentsHealth Effects3. Terminology3.1 Definitions:3.1.1 Definitions are in accordance with Terminology
18、 F412 and abbreviations are in accordance with Terminology D1600,unless otherwise indicated. The abbreviation for chlorinated poly(vinyl chloride) is CPVC.4. Classification4.1 GeneralThis specification covers Schedule 40 CPVC pipe fittings, socket-type, intended for use with Iron Pipe Size (IPS)outs
19、ide-diameter plastic pipe.4.1.1 Fittings covered by this specification are normally molded. In-line fittings, such as couplings, unions, bushings, caps,nipples, and the like, shall be molded or machined from extruded stock.4.1.2 Fittings fabricated by backwelding are not included in this specificati
20、on.NOTE 3This specification does not include requirements for pipe and fittings intended to be used to vent combustion gases.5. Materials and Manufacture5.1 This specification covers CPVC pipe fittings made from compounds meeting the requirements of Class 23447 as definedin Specification D1784.NOTE
21、4Mechanical strength, heat resistance, flammability, and chemical resistance requirements are covered in Specification D1784.5.2 Rework MaterialThe manufacturers shall use only their own clean rework fitting material and the fittings produced shallmeet all the requirements of this specification.6. R
22、equirements6.1 Dimensions and Tolerances:6.1.1 Fitting sockets, inside diameters (waterways), minimum wall thicknesses, and dimensions shall be as shown in Tables 1-4and when measured in accordance with Test Method D2122.6.1.2 When multistep reducer bushings are cored out, the inner socket shall be
23、reinforced from the outer wall by a minimumof three ribs extending from the top of the inner socket in the deepest extremity of the coring. The transition from D to DJ (Table3) shall be straight, tapered as shown, or radiused. A positive taper in the same direction of the taper in the socket on the
24、outsidediameter of the bushing is optional.6.1.3 The maximum angular variation of any opening shall be not more than 12 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 least equal tothe minimum wall thickness of the corresponding size of Schedule 40 pipe. For any threaded transition fitting, the minimum wallthickness of the threaded portion shall be at least equal to the thickness o
26、f material under the thread root of threaded Schedule 80pipe of the same size.6.1.5 The minimum inside diameter of the fittings shall be not less than the minimum specified inside diameter of thecorresponding size of Schedule 40 pipe. Any fitting having a male thread shall have an internal diameter
27、not larger than Schedule80 pipe of the same size.6.1.6 Minimum dimensions have zero negative tolerance. Tolerances on other dimensions are shown in Table 1 and Table 3.6.2 ThreadsFor all fittings having taper pipe threads, threads shall conform to Specification F1498 and be gaged in accordancewith 8
28、.4.6.3 Burst Pressure:6.3.1 The minimum burst strength of the fittings shall be not less than that calculated for the size and wall thickness of the pipewith which it is to be used, when calculated from the following equation:S 5 P DO2t!/2twhere:S = hoop stress, psi (or MPa),P = internal pressure, p
29、si (or MPa),DO = average outside diameter, in. (or mm), andt = minimum wall thickness, in. (or mm).Fittings tested in accordance with 8.5 shall withstand the minimum burst pressure shown in Table 4.6.3.2 Pressures shown are minimum burst pressures and do not imply rated working pressures. The burst
30、pressure shall be usedonly as an indication of quality.F438 152TABLE 1 Tapered Sockets for CPVC Pipe Fittings, Schedule 40, in. (mm)ANominalPipeSizeASocket Entrance DiameterBSocket Bottom Diameter CBSocketminin. (mm)DCInsideDiameter,minin. (mm)Wall Thickness, min OutsideDiameterof Hub,M, minEntrance
31、, minDiameterin. (mm)Toleranceon Diameterin. (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) 0.004 (0.10) 0.016 (0.41) 0.536 (13.6) 0.004 (0.10) 0.016 (0.41) 0.500 (12.70) 0.320 (8.13) 0.0
32、88 (2.23) 0.110 (2.79) 0.672 164 (0.40) 164 (0.40)38 0.687 (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) 0.821 132 (0.79) 132 (0.79)12 0.848 (21.54) 0.004 (0.10) 0.016 (0.41) 0.836 (21.23) 0.004 (0.10) 0.016 (0.41) 0.6
33、88 (17.48) 0.578 (14.68) 0.109 (2.76) 0.136 (3.45) 0.998 132 (0.79) 132 (0.79)34 1.058 (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) 1.221 132 (0.79) 132 (0.79)1 1.325 (33.66) 0.005 (0.13) 0.020 (0.51) 1.310 (33.27) 0.
34、005 (0.13) 0.020 (0.51) 0.875 (22.23) 0.990 (25.15) 0.133 (3.38) 0.166 (4.22) 1.504 116 (1.59) 116 (1.59)114 1.670 (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) 1.871 116 (1.59) 116 (1.59)112 1.912 (48.56) 0.006 (0.15)
35、 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) 2.127 116 (1.59) 116 (1.59)2 2.387 (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) 2.634 116 (1.59) 116 (1.59)21
36、2 2.889 (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) 3.170 332 (2.38) 18 (3.18)3 3.516 (89.31) 0.008 (0.20) 0.030 (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.
37、841 332 (2.38) 18 (3.18)312 4.016 (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) 4.374 332 (2.38) 18 (3.18)4 4.518 (114.76) 0.009 (0.23) 0.030 (0.76) 4.491 (114.07) 0.009 (0.23) 0.030 (0.76) 2.000 (50.80) 3.961 (100.6
38、1) 0.237 (6.02) 0.296 (7.52) 4.907 332 (2.38) 18 (3.18)5 5.583 (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) 6.039 332 (2.38) 18 (3.18)6 6.647 (168.83) 0.011 (0.28) 0.060 (1.52) 6.614 (168.00) 0.011 (0.28) 0.060 (1.
39、52) 3.000 (76.20) 5.986 (152.04) 0.280 (7.11) 0.350 (8.89) 7.203 18 (3.18) 316 (4.76)A The sketches and designs of fittings are illustrative only.B Socket depth, measured from socket entrance face to socket bottom face.C See 6.1.5.F4381537. Workmanship, Finish, and Appearance7.1 The fittings shall b
40、e homogeneous throughout and free of cracks, holes, foreign inclusions, or other defects.The fittings shallbe as uniform as commercially practicable in color, opacity, density, and other physical properties.8. Test Methods8.1 ConditioningCondition the test specimens at 73.4 6 3.6F (23 6 2C) and 50 6
41、 5 %10 % relative humidity for not lessthan 40 h prior to test in accordance with Procedure A of Practice D618, for those tests where conditioning is required.8.2 Test ConditionsConduct tests in the Standard Laboratory Atmosphere of 73.4 6 3.6F (23 6 2C) and 50 6 5 %10 %relative humidity, unless oth
42、erwise specified in the test methods or in this specification.8.3 SamplingA sufficient quantity of fittings as agreed upon between the seller and the purchaser shall be selected at randomfrom each lot or shipment and tested to determine that the basic design is in conformance with this specification
43、.NOTE 5For individual orders or specifications where supplemental tests are required, only those tests and numbers of tests specifically agreed uponbetween the purchaser and the seller need be conducted.8.4 ThreadsAll taper pipe threads shall be gaged in accordance with Specification F1498.8.5 Burst
44、 PressureDetermine the minimum burst pressure in accordance with Test Method D1599. The time of testing eachspecimen shall be between 60 and 70 s.8.5.1 ApparatusFittings shall be tested while held in a test jig constructed in such a manner as to seal the socket by meansof O-rings, or gaskets, but no
45、t to reinforce or support the fittings, except where contact is necessary because of the shape of thefitting to keep the fitting in the test jig. Such contact shall be held to the minimum. The socket plug portion of the test fixture mustextend one third to two thirds of the socket depth. Failure of
46、any part of the test apparatus does not constitute failure of the fittings.9. Retest and Rejection9.1 If the results of any test(s) do not meet the requirements of this specification, the tests(s) shall be conducted again only byagreement between the purchaser and seller. Under such agreement, minim
47、um requirements shall not be lowered, changed, orTABLE 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)14 516 (7.94) 532 (3.97) 116 (
48、1.59)38 38 (9.53) 316 (4.76) 332 (2.38)12 12 (12.70) 14 (6.35) 332 (2.38)34 916 (14.29) 516 (7.94) 332 (2.38)1 1116 (17.46) 516 (7.94) 332 (2.38)114 78 (22.22) 38 (9.53) 332 (2.38)112 1 (25.40) 716 (11.11) 332 (2.38)2 114 (31.75) 58 (15.88) 332 (2.38)212 112 (38.10) 1116 (17.46) 316 (4.76)3 11316 (4
49、6.04) 34 (19.05) 316 (4.76)312 218 (53.98) 1 (25.40) 316 (4.76)4 2516 (58.74) 1 (25.40) 316 (4.76)5 3 (76.20) 138 (34.92) 316 (4.76)6 312 (88.90) 134 (44.45) 14 (6.35)A The sketches and designs of fittings are illustrative only.F438 154modified, nor shall specification limits be changed. If upon retest, failure occurs, the quantity of product represented by the test(s)does not meet the requirements of this specification.10. Product Marking
