1、Designation: B837 10Standard 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.1.2 O60 (soft annealed) temper gas tube is produced in therange of standard sizes38 to118 in. outside diameter; H58(drawn general purpose) temp
4、er gas tube is produced in therange of standard sizes38 to118 in. outside diameter.NOTE 1Tube temper, size and joining method are determined byinstallation code requirements.1.3 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconve
5、rsions to SI units that are provided for information onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:2B153 Test Method for Expansion (Pin Test) of Copper andCopper-Alloy Pipe and TubingB601 Classification for Temper Designations for Copperand Copper AlloysWrought and Ca
6、stB846 Terminology for Copper and Copper AlloysE3 Guide for Preparation of Metallographic SpecimensE8 Test Methods for Tension Testing of Metallic MaterialsE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with
7、 SpecificationsE53 Test Method for Determination of Copper in UnalloyedCopper by GravimetryE62 Test Methods for Chemical Analysis of Copper andCopper Alloys (Photometric Methods)3E112 Test Methods for Determining Average Grain SizeE243 Practice for Electromagnetic (Eddy-Current) Exami-nation of Copp
8、er and Copper-Alloy TubesE255 Practice for Sampling Copper and Copper Alloys forthe Determination of Chemical Composition3. 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 petrol
9、eum (LP) gas, nany of the followinghydrocarbons or mixtures of them: propane, propylene, butane(normal butane or isobutane) and butylene.3.2.2 tube, gas, ntube specifically intended for use inabove ground and natural gas and liquified petroleum gas fueldistribution systems and conforming to the part
10、icular dimen-sions known as Type GAS.4. Ordering Information4.1 Include the following information in orders for product.4.1.1 Type GAS tube (Table 1),4.1.2 Standard size (Table 1),4.1.3 Temper (Sections 5 and 7),4.1.4 Whether tension tests, Rockwell Hardness tests, andgrain size determinations are r
11、equired (Section 8),4.1.5 Whether an expansion test is required (Section 9),4.1.6 Length (11.5Table 2),4.1.7 Whether the tube is to be furnished in coils or straightlengths,4.1.8 Quantity: number of straight lengths or coils required,1This specification is under the jurisdiction ofASTM Committee B05
12、 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.04 on Pipeand Tube.Current edition approved Oct. 1, 2010. Published December 2010. Originallyapproved in 1993. Last previous edition approved in 2009 as B837 01 (2009).DOI: 10.1520/B0837-10.2For referenced ASTM standard
13、s, 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.3Withdrawn. The last approved version of this historical standard is referencedon www.astm
14、.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.4.1.9 Certification, if required (Section 20), and4.1.10 Mill test report, if required (Section 21).4.2 In additio
15、n, when material is purchased for agencies ofthe U.S. government, it shall conform to the SupplementaryRequirements as defined herein, when specified in the contractor purchase order.5. Materials and Manufacture5.1 The material shall be of such quality and purity that thefinished tube shall have the
16、 properties and characteristicsprescribed in this specification and shall be cold drawn to size.5.2 The tube shall be finished by such cold-working andannealing operations as are necessary to produce the requiredtemper and surface finish.5.3 Tubes furnished in coils shall be annealed after coiling.5
17、.4 Tubes in straight lengths shall be furnished in the H58(Drawn General Purpose) temper, except when the O60 (SoftAnneal) temper is specified in the purchase order or contract.6. Chemical Composition6.1 The material shall conform to the following chemicalrequirements of Copper UNS No. C12200:Copper
18、 (incl. silver), Phosphorus 99.9 % min.0.015 to 0.040 %6.2 These composition limits do not preclude the presenceof other elements. Limits for unnamed elements may beestablished by agreement between the manufacturer or supplierand the purchaser.7. Temper7.1 Type GAS copper tube shall be furnished in
19、either of thefollowing tempers as defined in Classification B601.Soft anneal O60Drawn general purpose H588. Mechanical Property Requirements8.1 The tube shall conform to the mechanical propertyrequirements specified in Table 3. Tension tests and grain sizedetermination need not be made except when r
20、equested by thepurchaser in the ordering document. Where agreement onRockwell Hardness tests cannot be reached, the tensile strengthand grain size requirements of Table 3 shall be the basis foracceptance or rejection.9. Expansion Test9.1 The soft anneal (O60) temper tube shall be capable ofbeing exp
21、anded in accordance with Test Method B153 withexpansion of the outside diameter in the following amount:TABLE 1 Dimensions, Mass and Tolerances in Diameter and Wall Thickness for Standard Sizes of Type GAS Seamless Copper Tubefor Natural Gas and Propane Fuel Distribution Systems (All Tolerances in T
22、his 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) 0.002 (0.051) 0.001 (0.025) 0.030 (0.7
23、62) 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) 0.004 (0.10) 0.362 (0.539)78 0.875 (22.3)
24、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 determined at any one cross section of the tube
25、.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)(30.5)2424(600)(600)ALonger lengths ar
26、e subject to agreement between the manufacturer or supplierand purchaser.TABLE 3 Mechanical Property RequirementsTemper Designation Tensile Strength AverageGrainSize, mmRockwell HardnessAStandard Formerksi,Bmin.MPamin.ScaleHardnessValueO60 Softanneal30 (205) 0.035min.F 50 maxH58 Drawngeneralpurpose3
27、6 (250) . 30T 30 minARockwell Hardness tests shall be made on the inside surface of the tube.Bksi = 1000 psi.B837 102Standard Size Expansion of(Actual Outside Diameter) Outside Diameterin. (mm) %0.625 (15.9) and under 40Over 0.625 (15.9) 30The expanded tube shall show no cracking or rupture visiblet
28、o the unaided eye.10. Nondestructive Testing10.1 Each tube up to and including 1.125-in. (28.6-mm)outside diameter shall be subjected to an eddy-current test.Testing shall follow the procedures of Practice E243, exceptfor the determination of “end effect”. Tubes shall be passedthrough an eddy-curren
29、t test unit adjusted to provide informa-tion on the suitability of the tube for the intended application.10.1.1 Either notch depth or drilled hole standards shall beused.10.1.1.1 Notch depth standards, rounded to the nearest0.001 in. (0.025 mm), shall be 22 % of the standard wallthickness. The notch
30、 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 so that a fraction of the maximum unbalancesignal can be selected, the following percent maximum unbal-ance signals may be used:
31、Standard Size, in. (mm)Unbalanced SignalMagnitude, max. %Up to 0.500 (12.7) incl. 0.20.625 (15.9) to 1.125 (29) incl. 0.310.1.1.2 Drilled holes shall be drilled radially through thewall using a suitable drill jig that has a bushing to guide thedrill, care being taken to avoid distortion of the tube
32、whiledrilling. The diameter of the drilled hole shall be in accordancewith the following Table and shall not vary by either morethan +0.001 in. ( +0.026 mm) or 0.000 in. (0.000 mm) of thehole diameter specified.Tube OutsideDiameter, in.Diameter of DrilledHoles, in. Drill No.38 to34 , incl 0.025 72Ov
33、er34 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 25 to 29, incl 0.92 6410.1.2 Tubes that do not actuate the signalling device of theeddy-current tester shall be considered in
34、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 determine whether the discontinuityis cause for rejection. Signals that are found to have beencaused by minor mechanical damage
35、 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.11. Dimensions, Mass, and Permissible Variations11.1 For the purpose of determining conformance with thedimensional requirements presc
36、ribed in this specification, anymeasured value outside the specified limiting values for anydimension may be cause for rejection.11.2 Standard Dimensions, Wall Thickness, and DiameterTolerancesThe standard dimensions, wall thickness, anddiameter tolerances shall be in accordance with Table 1.11.3 Ma
37、ssFor purposes of calculating mass, cross sec-tions, etc., the density of copper will be 0.323 lbs/in.3(8.94g/cm3). The theoretical mass per foot is given in Table 1.11.4 RoundnessFor drawn tube in straight lengths, theroundness tolerance shall be as specified in Table 4. Thedeviation from roundness
38、 is measured as the difference be-tween 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.11.5 Standard Lengths and TolerancesThe standardlengths and tolerances s
39、hall be as specified in Table 2.11.6 Squareness of CutFor tubes in straight lengths, thedeparture from squareness of the end of any tube shall notexceed 0.010 in. (0.25 mm) for tube up to and including0.625-in. (15.9-mm) standard size; and not more than 0.016in./in. (0.016 mm/mm) of outside diameter
40、 for tube larger than0.625-in. (15.9-mm) standard size.12. Workmanship, Finish, and Appearance12.1 The tubes shall be clean and free from scale, adherentdirt, and defects of a nature that interfere with the intendedpurpose of the tubes.13. Sampling13.1 The lot size, portion size, and selection of pi
41、eces shallbe as follows:13.1.1 Lot size shall be 5000 lb (2275 kg) or fractionthereof.13.1.2 Sample pieces shall be selected according to thefollowing schedule:Number of Piecesin the LotNumber of Piecesto be Selected1to50 151 to 200 2201 to 1500 3Over 1500 0.2 % of total number piecesbut not to exce
42、ed 1013.1.3 Coiled TubeA length sufficient for all necessarytests shall be cut from each coil.The remaining portion of thesecoils shall be identified and included in the shipment. Thepermissible variation in lengths of such coils shall be waived.TABLE 4 Roundness Tolerancet/d (Ratio of Wall Thicknes
43、sto Outside Diameter)Roundness Tolerance% of OutsideDiameter (Expressed to Nearest0.001 in. or 0.025 mm)0.01 to 0.03, incl 1.5Over 0.03 to 0.05, incl 1.0Over 0.05 to 0.10, incl 0.8B837 10313.2 Sampling for Chemical Analysis:13.2.1 The sample shall be taken in approximately equalweight from each port
44、ion piece selected in 13.1.2 and inaccordance with Practice E255. The minimum weight of thecomposite sample shall be 150 g.13.2.2 Instead of sampling in accordance with PracticeE255, the manufacturer shall have the option of sampling at thetime castings are poured or from the semi-finished product.1
45、3.2.3 The number of samples taken during the course ofmanufacture shall be as follows:13.2.3.1 When samples are taken at the time the castings arepoured, at least one sample shall be taken for each group ofcastings poured simultaneously from the same source ofmolten metal.13.2.3.2 When samples are t
46、aken from the semi-finishedproduct, a sample shall be taken to represent each 10 000 lb(4550 kg) or fraction thereof, except that not more than onesample per piece shall be required.13.2.4 When the material is sampled during the course ofmanufacture, sampling of the finished product is not required.
47、13.3 Sampling for Other Tests:13.3.1 Specimens for all other tests shall be taken from twoof the sample pieces taken in 13.1.2. In the event only onesample piece is required, all specimens shall be taken from thepiece selected.14. Number of Tests and Retests14.1 Tests:14.1.1 Chemical composition sha
48、ll be determined as theaverage of at least two replicate determinations for eachspecified element.14.1.2 Mechanical properties shall be determined as theaverage of results from two test specimens; one taken fromeach of the two sample pieces selected in 13.1.2.14.2 Retests:14.2.1 Chemical Composition
49、Should one or more of thedeterminations fail to conform with the requirements of thisspecification a retest may be made on a new composite madeup from the pieces originally selected.14.2.2 Mechanical PropertiesShould the results of testson any specimen fail to meet the prescribed requirements, twoadditional specimens shall be taken from different samplepieces and tested and the results of both of these tests shallcomply with the specified requirements.14.2.3 Eddy Current TestTubes with discontinuities indi-cated by the testing unit may, at
