1、Designation: B837 18Standard Specification forSeamless Copper Tube for Natural Gas and LiquifiedPetroleum (LP) Gas Fuel Distribution Systems1This standard is issued under the fixed designation B837; the number immediately following the designation indicates the year oforiginal adoption or, in the ca
2、se 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.1. Scope*1.1 This specification establishes the requirements for TypeGAS seamless Copper UNS No. C1220
3、0 tube for use in aboveground natural gas and liquified petroleum (LP) gas fueldistribution systems, commonly assembled with flared fittingsor brazed joints.NOTE 1Tube temper, size, and joining method are determined byinstallation code requirements.1.2 UnitsThe values stated in inch-pound units are
4、to beregarded as standard. The values given in parentheses aremathematical conversions to SI units which are provided forinformation only and are not considered standard.1.3 The following safety hazard caveat pertains only to thetest method(s) portion, Section 17, of this specification. Thisstandard
5、 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 prior to use.1.4 This internation
6、al 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 TechnicalBarriers to Trade (TBT) Committ
7、ee.2. Referenced Documents2.1 ASTM Standards:2B153 Test Method for Expansion (Pin Test) of Copper andCopper-Alloy Pipe and TubingB577 Test Methods for Detection of Cuprous Oxide (Hydro-gen Embrittlement Susceptibility) in CopperB601 Classification for Temper Designations for Copper andCopper AlloysW
8、rought and CastB846 Terminology for Copper and Copper AlloysB900 Practice for Packaging of Copper and Copper AlloyMill Products for U.S. Government AgenciesB968/B968M Test Method for Flattening of Copper andCopper-Alloy Pipe and TubeE3 Guide for Preparation of Metallographic SpecimensE8/E8M Test Met
9、hods for Tension Testing of Metallic Ma-terialsE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE53 Test Method for Determination of Copper in UnalloyedCopper by GravimetryE62 Test Methods f
10、or Chemical Analysis of Copper andCopperAlloys (Photometric Methods) (Withdrawn 2010)3E112 Test Methods for Determining Average Grain SizeE243 Practice for Electromagnetic (Eddy Current) Examina-tion of Copper and Copper-Alloy TubesE255 Practice for Sampling Copper and Copper Alloys forthe Determina
11、tion of Chemical CompositionE527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)3. Terminology3.1 For definitions of terms relating to copper and copperalloys, refer to Terminology B846.3.2 Definitions of Terms Specific to This Standard:3.2.1 liquified petroleum (LP) ga
12、s, nany of the followinghydrocarbons or mixtures of them: propane, propylene, butane(normal butane or isobutane) and butylene.4. Ordering Information4.1 Include the following specified choices when placingorders for product under this specification, as applicable:4.1.1 ASTM designation and year of i
13、ssue,1This specification is under the jurisdiction ofASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.04 on Pipeand Tube.Current edition approved Nov. 1, 2018. Published December 2018. Originallyapproved in 1993. Last previous edition approved in 201
14、0 as B83710. DOI:10.1520/B083718.2For 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 page onthe ASTM website.3The last approved version o
15、f this historical standard is referenced onwww.astm.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 inter
16、nationally 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) Committee.14.1.2 Copper Alloy UNS No. (or other internation
17、allyrecognized copper alloy) designation,4.1.3 Temper (Sections 5 and 7),4.1.4 Dimensions (Standard Size), diameter, and wall thick-ness (Table 1),4.1.5 How furnished: straight lengths or coils,4.1.6 Length(Table 2 and 12.5),4.1.7 Quantitytotal weight or total length or number ofpieces of each size,
18、 and4.1.8 Intended application.4.2 The following options are available but may not beincluded unless specified at the time of placing of the order,when required:4.2.1 Tensile test (Section 9),4.2.2 Electromagnetic (eddy-current) examination (Section11),4.2.3 Embrittlement test (Section 10),4.2.4 Exp
19、ansion test (Section 10),4.2.5 Flattening test (Section 10),4.2.6 Certification (Section 21),4.2.7 Test report (Section 22), and4.2.8 If product is purchased for agencies of the U.S.Government (see the Supplementary Requirements section ofthis specification or the general requirements section foradd
20、itional requirements, if specified).5. Materials and Manufacture5.1 Materials:5.1.1 The material of manufacture shall be a tube of CopperUNS No. C12200 of such purity and soundness as to besuitable for processing into the products prescribed herein. Thefinished tube shall have the properties and cha
21、racteristicsprescribed in this specification and shall be cold drawn to size.5.1.2 When specified in the contract or purchase order thatheat identification or traceability is required, the purchasershall specify the details desired.NOTE 2Because of the discontinuous nature of the processing ofcastin
22、gs into wrought products, it is not practical to identify a specificcasting analysis with a specific quantity of finished material.5.2 Manufacture:5.2.1 The product shall be manufactured by such hot-working, cold-working, and annealing processes as to producea uniform wrought structure in the furnis
23、hed product.5.2.2 The product shall be hot- or cold-worked to thefinished size and subsequently annealed, when required, tomeet the temper properties specified.5.2.3 Tube, when furnished in coils, shall be annealed aftercoiling.5.2.4 Tube, when furnished in straight lengths, shall benormally furnish
24、ed in the H58 (Drawn General Purpose)temper, except when the O60 (SoftAnneal) temper is specifiedin the purchase order or contract.6. Chemical Composition6.1 The chemical composition shall conform to the follow-ing chemical requirements of Copper UNS No. C12200:Copper (incl. silver) 99.9 % min.Phosp
25、horus 0.015 to 0.040 %6.2 These composition limits do not preclude the presenceof other elements. When included in the contract or purchaseorder, and agreed upon by the manufacturer or supplier and thepurchaser, limits shall be established and analysis required forunnamed elements.7. Temper7.1 Type
26、GAS copper tube shall be furnished in either of thefollowing tempers as defined in Classification B601.Soft anneal O60Drawn general purpose H588. Grain Size for Annealed Tempers8.1 Grain size shall be the standard requirement for allproduct in the annealed tempers.8.2 Acceptance or rejection based u
27、pon grain size shalldepend only on the average grain size of a test specimen takenfrom each of two sample portions, and each specimen shall beTABLE 1 Dimensions, Mass and Tolerances in Diameter and Wall Thickness for Standard Sizes of Type GAS Seamless Copper Tube forNatural Gas and Propane Fuel Dis
28、tribution Systems (All Tolerances in This Table Are Plus and Minus)StandardSize, in.Actual OutsideDiameterAverage Outside DiameterATolerances Wall Thickness and Tolerance Theoretical Massin. (mm) Annealed Drawn Wall Thickness ToleranceBlbs/ft (kg/m)in. (mm) in. (mm) in. (mm) in. (mm)38 0.375 (9.52)
29、0.002 (0.051) 0.001 (0.025) 0.030 (0.762) 0.003 (0.076) 0.126 (0.187)12 0.500 (12.7) 0.0025 (0.064) 0.001 (0.025) 0.035 (0.889) 0.004 (0.10) 0.198 (0.146)58 0.625 (15.9) 0.0025 (0.064) 0.001 (0.025) 0.040 (1.02) 0.004 (0.10) 0.285 (0.424)34 0.750 (19.1) 0.0025 (0.064) 0.001 (0.025) 0.042 (1.07) 0.00
30、4 (0.10) 0.362 (0.539)78 0.875 (22.3) 0.003 (0.076) 0.001 (0.025) 0.045 (1.14) 0.004 (0.10) 0.455 (0.677)118 1.125 (29) 0.0035 (0.07) 0.0015 (0.038) 0.050 (1.27) 0.005 (0.13) 0.655 (0.975)AThe average outside diameter of a tube is the average of the maximum and minimum outside diameter, as determine
31、d at any one cross section of the tube.BMaximum permissible deviation at any one point.TABLE 2 Standard LengthsAand TolerancesStandard Size,in.Standard Length Tolerance, all plusft. (m) in. (mm)Tubes Furnished in Straight Lengths38 118 1220(3.7)(6.1)11(25)(25)Tubes Furnished in Coils38 118 60100(18)
32、(30.5)2424(600)(600)ALonger lengths are subject to agreement between the manufacturer or supplierand purchaser.B837 182within the limits prescribed in Table 3, when determined inaccordance with Test Methods E112.9. Mechanical Property Requirements9.1 Tensile Strength Requirement:9.1.1 When specified
33、 in the contract or purchase order, theproduct shall conform to the tensile strength requirements inTable 3, when tested in accordance with Test Methods E8/E8M. Actual testing need not be performed unless specified attime of order placement.9.1.2 Acceptance or rejection based upon mechanical prop-er
34、ties shall depend only on tensile strength.9.2 Rockwell Hardness Requirement:9.2.1 When specified in the contract or purchase order, theproduct shall conform to the Rockwell Hardness requirementprescribed in Table 3, when tested in accordance with TestMethods E18.10. Performance Requirements10.1 Exp
35、ansion Test:10.1.1 When specified in the contract or purchase order,tube furnished in the soft-anneal (O60) shall withstand expan-sion in accordance with Test Method B153 to the followingextent:Standard Size Expansion of(Actual Outside Diameter) Outside Diameterin. (mm) %0.625 (15.9) and under 40Ove
36、r 0.625 (15.9) 3010.1.2 The expanded tube shall show no cracking or rupturevisible to the unaided eye.10.2 Flattening Test:10.2.1 When specified in the contract or purchase order, theflattening test in accordance with Test Method B968/B968Mshall be performed.10.2.1.1 During inspection, the flattened
37、 areas of the testspecimen shall be free of defects, but blemishes of a nature thatdo not interfere with the intended application are acceptable.10.3 Microscopical Examination for Susceptibility to Hy-drogen Embrittlement:10.3.1 Tubes furnished in all coppers shall be capable ofpassing the embrittle
38、ment test specified in Procedure B of TestMethods B577. In case of a dispute, Procedure C of TestMethods B577 shall be used as the referee method.11. Nondestructive Testing11.1 Each tube up to and including 1.125 in. (28.6 mm)outside diameter shall be subjected to an eddy-current test.Testing shall
39、follow the procedures of Practice E243, exceptfor the determination of “end effect.” Tubes shall be passedthrough an eddy-current test unit adjusted to provide informa-tion on the suitability of the tube for the intended application.11.1.1 Either notch depth or drilled hole standards shall beused.11
40、.1.1.1 Notch depth standards, rounded to the nearest0.001 in. (0.025 mm), shall be 22 % of the standard wallthickness. The notch depth tolerance shall be plus and minus0.0005 in. (0.013 mm). Alternatively, at the option of themanufacturer, using speed-insensitive eddy-current units thatare equipped
41、so that a fraction of the maximum unbalancesignal can be selected, the following percent maximum unbal-ance signals may be used:Standard Size, in. (mm)Unbalanced SignalMagnitude, max. %Up to 0.500 (12.7) incl. 0.20.625 (15.9) to 1.125 (29) incl. 0.311.1.1.2 Drilled holes shall be drilled radially th
42、rough thewall using a suitable drill jig that has a bushing to guide thedrill, care being taken to avoid distortion of the tube whiledrilling. The diameter of the drilled hole shall be in accordancewith the following Table and shall not vary by either morethan +0.001 in. ( +0.025 mm) or 0.000 in. (0
43、.000 mm) of thehole diameter specified.Tube OutsideDiameter, in.Diameter of DrilledHoles, in. Drill No.38 to34, incl 0.025 72Over34 to 1, incl 0.031 68Over 1 to 118, incl 0.036 64Tube OutsideDiameter, mmDiameter of DrilledHoles, mm Drill No.9.0 to 19.0, incl 0.64 72Over 19.0 to 25, incl 0.79 68Over
44、25 to 29, incl 0.92 6411.1.2 Tubes that do not actuate the signaling device of theeddy-current tester shall be considered in conformance with therequirements of this test. Tubes with discontinuities indicatedby the testing unit may, at the option of the manufacturer, bere-examined or retested to det
45、ermine whether the discontinuityis cause for rejection. Signals that are found to have beencaused by minor mechanical damage shall not be cause forrejection of the tubes, provided the tube dimensions are stillwithin the specified limits and the tube is suitable for itsintended application.12. Dimens
46、ions, Mass, and Permissible Variations12.1 For the purpose of determining conformance with thedimensional requirements prescribed in this specification, anyTABLE 3 Mechanical Property RequirementsTemper Designation Tensile Strength AverageGrain Size,mmRockwell HardnessAStandard Formerksi,Bmin.MPa mi
47、n. ScaleHardnessValueO60 Soft anneal 30 (205) 0.035 min. F 50 maxH58 Drawn generalpurpose36 (250) . 30T 30 minARockwell Hardness tests shall be made on the inside surface of the tube.Bksi = 1000 psi.B837 183measured value outside the specified limiting values for anydimension shall make the tube sub
48、ject to rejection at the optionof the purchaser.12.2 Standard Dimensions, Wall Thickness, and DiameterTolerancesThe standard dimensions, wall thickness, anddiameter tolerances shall be in accordance with Table 1.12.3 MassFor purposes of calculating mass, crosssections, etc., the density of copper sh
49、all be taken as 0.323lb/in.3(8.94 g/cm3). The theoretical weight per foot is given inTable 1.12.4 RoundnessFor drawn unannealed tube in straightlengths, the roundness tolerance shall be as specified in Table4. The deviation from roundness is measured as the differencebetween major and minor diameters as determined at any onecross section of the tube. No roundness tolerance has beenestablished for annealed tube in straight lengths or for tubefurnished in coils.12.5 Lengths and Tolerances:12.5.1 Standard Lengths and TolerancesThe standardlengths an
