1、Designation: B 837 01Standard Specification forSeamless Copper Tube for Natural Gas and LiquifiedPetroleum (LP) Gas Fuel Distribution Systems1This standard is issued under the fixed designation B 837; the number immediately following the designation indicates the year oforiginal adoption or, in the
2、case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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. C
3、12200 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 sizes38to78in. outside diameter; H58(drawn general purpose) tem
4、per gas tube is produced in therange of standard sizes38to118in. outside diameter.1.3 O60 (soft annealed) temper gas tube systems are nor-mally assembled with single 45 flared fittings, althoughbrazed connections using wrought or cast fittings may bepermitted by local or code requirements. H58 (draw
5、n generalpurpose) temper gas tube systems are assembled with brazedconnections.NOTE 1Tube temper and applicable size are determined by installa-tion code requirements.1.4 Flared fittings used with seamless copper tube fornatural gas and liquified petroleum (LP) gas fuel distributionsystems shall be
6、free of residual stresses.1.5 The values stated in inch-pound units are standard. SIvalues given in parentheses are for information only.2. Referenced Documents2.1 ASTM Standards:B 153 Test Method for Expansion (Pin Test) of Copper andCopper-Alloy Pipe and Tubing2B 601 Classification for Temper Desi
7、gnations for Copperand Copper AlloysWrought and Cast2B 846 Terminology for Copper and Copper Alloys2E 3 Practice for Preparation of Metallographic Specimens3E 8 Test Methods for Tension Testing of Metallic Materials3E 18 Test Methods for Rockwell Hardness and RockwellSuperficial Hardness of Metallic
8、 Materials3E 29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications4E 53 Test Methods for Determination of Copper in Unal-loyed Copper by Gravimetry5E 62 Test Methods for Chemical Analysis of Copper andCopper Alloys (Photometric Methods)5E 112 Test Methods
9、for Determining Average Grain Size3E 243 Practice for Electromagnetic (Eddy-Current) Exami-nation of Copper and Copper-Alloy Tubes6E 255 Practice for Sampling Copper and Copper Alloys forDetermination of Chemical Composition53. Terminology3.1 For general definitions of terms relating to copper andco
10、pper alloys, refer to Terminology B 846.3.2 Definitions:3.2.1 coil, na length of tube formed into a series ofconnected turns. The unqualified term “coil” as applied to tubeusually refers to a bunch coil.3.2.1.1 coil, bunched, na coil in which turns are bunchedand held together such that a cross sect
11、ion of the bunched turnsis approximately circular.3.2.1.2 coil, double-layer flat, na coil in which the prod-uct is spirally wound into two connected disk-like layers suchthat one layer is on top of the other (a double-layer pancakecoil or a double-layer spirally wound coil).3.2.1.3 coil, level or t
12、raverse wound, na coil in which theturns are wound into layers parallel to the axis of the coil suchthat successive turns in a given layer are adjoining one another(sometimes called a helical coil).3.2.1.4 coil, single-layer flat, na coil in which the productis spirally wound into a single disk-like
13、 layer (a pancake coil ora single-layer spirally wound coil).1This specification is under the jurisdiction of ASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.04 on Pipeand Tube.Current edition approved Oct. 10, 2001. Published December 2001. Origina
14、llypublished as B 837 93. Last previous edition B 837 95.2Annual Book of ASTM Standards, Vol 02.01.3Annual Book of ASTM Standards, Vol 03.01.4Annual Book of ASTM Standards, Vol 14.02.5Annual Book of ASTM Standards, Vol 03.05.6Annual Book of ASTM Standards, Vol 03.03.1*A Summary of Changes section ap
15、pears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.2.2 liquified petroleum (LP) gas, nany of the followinghydrocarbons or mixtures of them: propane, propylene, butane(normal butane or isobutane) and bu
16、tylene.3.2.3 tube, gas, ntube specifically intended for use inabove ground and natural gas and liquified petroleum gas fueldistribution systems and conforming to the particular dimen-sions known as Type GAS.3.3 Definitions of Terms Specific to This Standard:3.3.1 “capable of”, adjas used in this spe
17、cification thetest need not be performed by the producer of the material toconfirm capability. However, should subsequent testing by thepurchaser establish that the material did not conform to therequirements of this specification, the material shall be subjectto rejection.4. Ordering Information4.1
18、 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 required (Section 8),4.1.5 Whether an expansion test is required
19、 (Section 9),4.1.6 Length (11.5Table 2),4.1.7 Whether the tube is to be furnished in straight lengthsor coils,4.1.8 Quantity: number of straight lengths or coils required,4.1.9 Certification, if required (Section 20), and4.1.10 Mill test report, if required (Section 21).4.2 In addition, when materia
20、l 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 properties and
21、 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.5.4 Tubes in str
22、aight 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 (incl. silver)
23、 99.9 % min.Phosphorus 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 either of thefol
24、lowing tempers as defined in Classification B 601.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 requested by the
25、purchaser 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.TABLE 1 Dimensions, Mass and Tolerances in Diameter and Wall Thickness for Standard Sizes of Type
26、GAS Seamless Copper Tubefor Natural Gas and Propane Fuel Distribution 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/
27、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 (0.762) 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
28、 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) 0.003 (0.076) 0.001 (0.025) 0.045 (1.14) 0.004 (0.10) 0.455 (0.677)118 1.125 (29) . . 0.0015 (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
29、maximum and minimum outside diameter, as determined 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 Lengths38118 1220(3.7)(6.1)1
30、1(25)(25)Tubes Furnished in Coils3878 60100(18)(30.5)2424(600)(600)ALonger lengths are subject to agreement between the manufacturer or supplierand purchaser.B8370129. Expansion Test9.1 The soft anneal (O60) temper tube shall be capable ofbeing expanded in accordance with Test Method B 153 withexpan
31、sion of the outside diameter in the following amount:Standard 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 visibleto the unaided eye.10. Nondestructive Testing10.1 Each tube up to
32、 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 E 243, exceptfor the determination of “end effect”. Tubes shall be passedthrough an eddy-current test unit adjusted to provide informa-tion on the suitability
33、 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 depth tolerance shall be plus and minus0.0005 in. (0.013 mm).
34、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:Standard Size, in. (mm)Unbalanced SignalMagnitude, max. %Up to
35、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 whiledrilling. The diameter of the drilled hole shall be in acc
36、ordancewith 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 72Over34 to 1, incl 0.031 68Over1to118, incl 0.036 64Tube OutsideDia
37、meter, 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 conformance with therequirements of this test. Tubes with discontinu
38、ities 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 shall not be cause forrejection of the tubes, provided the tube dim
39、ensions 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 prescribed in this specification, anymeasured value outside the specified
40、 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 MassFor purposes of calculating mass, cross sec-tions, etc., the densi
41、ty 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 is measured as the difference be-tween major and minor diameters as
42、 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 shall be as specified in Table 2.11.6 Squareness of CutFor tubes in s
43、traight 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 for tube larger than0.625-in. (15.9-mm) standard size.TABLE 3 Mecha
44、nical Property RequirementsTemper Designation Tensile Strength AverageGrainSize, mmRockwell HardnessAStandard Formerksi,Bmin.MPamin.ScaleHardnessValueO60 Softanneal30 (205) 0.035min.F 50 maxH58 Drawngeneralpurpose36 (250) . 30T 30 minARockwell Hardness tests shall be made on the inside surface of th
45、e tube.Bksi = 1000 psi.TABLE 4 Roundness Tolerancet/d (Ratio of Wall Thicknessto 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 0.8B83701312. Workmanship, Finish, and Appeara
46、nce12.1 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 pieces shallbe as follows:13.1.1 Lot size shall be 5000 lb (2275 kg) or fractionthereof.13.1.
47、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 exceed 1013.1.3 Coiled TubeA length sufficient for all necessarytests shall be cut from each co
48、il. The remaining portion of thesecoils shall be identified and included in the shipment. Thepermissible variation in lengths of such coils shall be waived.13.2 Sampling for Chemical Analysis:13.2.1 The sample shall be taken in approximately equalweight from each portion piece selected in 13.1.2 and
49、 inaccordance with Practice E 255. The minimum weight of thecomposite sample shall be 150 g.13.2.2 Instead of sampling in accordance with PracticeE 255, the manufacturer shall have the option of sampling atthe time castings are poured or from the semi-finished product.13.2.3 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
