1、Designation: B751 08 (Reapproved 2013)Standard Specification forGeneral Requirements for Nickel and Nickel Alloy WeldedTube1This standard is issued under the fixed designation B751; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, t
2、he 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. Scope1.1 This specification contains various requirements that,with the exception of Sections 6 and 7, are mandatory
3、requirements to the following ASTM nickel and nickel alloy,longitudinally welded tubular product specifications:Title of SpecificationASTMDesignationWelded UNS N08020, N08024, and UNS N08026 Alloy Tubes B468Welded UNS N08120, UNS N08800, UNS N08810, UNSN08811 Alloy TubesB515Welded Nickel-Chromium-Ir
4、on Alloy (UNS N06600, UNSN06603, UNS N06025, and UNS N06045) TubesB516Welded Nickel and Nickel-Cobalt Alloy Tube B626UNS N08904, UNS N08925, and UNS N08926 Welded Tube B674UNS N08366 and UNS N08367 Welded Tube B676Welded UNS N06625, N06219, and N08825 Alloy Tubes B704Ni-Cr-Mo-Co-W-Fe-Si Alloy (UNS N
5、06333) Welded Tube B726Welded Nickel (UNS N02200/UNS N02201) and Nickel Cop-per Alloy (UNS N04400) TubeB7301.2 One or more of the test requirements of Section 6 applyonly if specifically stated in the product specification or in thepurchase order.1.3 In case of conflict between a requirement of the
6、productspecification and a requirement of this general specification,only the requirement of the product specification need besatisfied.1.4 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided f
7、or information onlyand are not considered standard.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to become familiarwith all hazards including those identified in the appropriateMaterial S
8、afety Data Sheet (MSDS) for this product/materialas provided by the manufacturer, to establish appropriatesafety and health practices, and determine the applicability ofregulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2B468 Specification for Welded UNS N08020 Alloy Tubes
9、B515 Specification for Welded UNS N08120, UNS N08800,UNS N08810, and UNS N08811 Alloy TubesB516 Specification for Welded Nickel-Chromium-IronAlloy(UNS N06600, UNS N06603, UNS N06025, and UNSN06045) TubesB626 Specification for Welded Nickel and Nickel-CobaltAlloy TubeB674 Specification for UNS N08925
10、, UNS N08354, andUNS N08926 Welded TubeB676 Specification for UNS N08367 Welded TubeB704 Specification for Welded UNS N06625, UNS N06219and UNS N08825 Alloy TubesB726 Specification for Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon Alloy (UNS N06333)Welded TubeB730 Specification for Welded
11、Nickel (UNS N02200/UNSN02201) and Nickel Copper Alloy (UNS N04400) TubeB880 Specification for General Requirements for ChemicalCheck Analysis Limits for Nickel, Nickel Alloys andCobalt AlloysE8 Test Methods for Tension Testing of Metallic MaterialsE18 Test Methods for Rockwell Hardness of Metallic M
12、a-terialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE39 Methods for Chemical Analysis of Nickel (Withdrawn1995)3E76 Test Methods for Chemical Analysis of Nickel-CopperAlloys (Withdrawn 2003)3E112 Test Methods for Determining Average Grain SizeE2
13、13 Practice for Ultrasonic Testing of Metal Pipe andTubingE273 Practice for Ultrasonic Testing of the Weld Zone of1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.07 on Refined Nickel and Cobalt and
14、 Their Alloys.Current edition approved Feb. 1, 2013. Published February 2013. Originallyapproved in 1985. Last previous edition approved in 2008 as B751 08. DOI:10.1520/B0751-08R13.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.or
15、g. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-29
16、59. United States1Welded Pipe and TubingE309 Practice for Eddy-Current Examination of Steel Tubu-lar Products Using Magnetic SaturationE426 Practice for Electromagnetic (Eddy-Current) Examina-tion of Seamless and Welded Tubular Products, Titanium,Austenitic Stainless Steel and Similar AlloysE571 Pra
17、ctice for Electromagnetic (Eddy-Current) Examina-tion of Nickel and Nickel Alloy Tubular ProductsE1473 Test Methods for Chemical Analysis of Nickel,Cobalt, and High-Temperature Alloys2.2 Other Documents:SNT-TC-1A Recommended Practice for Nondestructive Per-sonnel Qualification and Certification43. T
18、erminology3.1 Definitions:3.1.1 average diameter, nthe average of the maximum andminimum outside diameters, as determined at any one crosssection of the tube.3.1.2 nominal wall, na specified wall thickness with a plusand minus tolerance from the specified thickness.3.1.3 thin wall tube, ntube with s
19、pecified wall thickness3 % or less of the specified outside diameter.3.1.4 welded tube, na hollow product of round or anyother cross section having a continuous periphery.4. Dimensions and Permissible Variations4.1 Diameter and Wall ThicknessIndividual measure-ments shall not exceed the tolerances s
20、pecified in Table 1. Thepermissible variation in outside diameter is not sufficient toprovide for ovality in thin-walled tubes. For thin-walled tubesthe maximum and minimum diameters at any cross sectionshall not deviate from the nominal diameter by more than twicethe permissible variation in outsid
21、e diameter given in the table;however, the mean diameter at that cross section must still bewithin the permissible variation.4.2 LengthWhen material is ordered cut-to-length, thelength shall conform to the permissible variations prescribed inTable 2.4.3 StraightnessMaterial shall be reasonably strai
22、ght andfree of bends and kinks.4.4 EndsEnds shall be plain or cut and deburred.5. Workmanship, Finish, and Appearance5.1 The material shall be uniform in quality and temper,smooth, and free of imperfections that would render it unfit foruse.6. Test Requirements6.1 Flange Test:6.1.1 A length of tube
23、not less than three times the specifieddiameter or 4 in. (102 mm), whichever is longer, shall becapable of having a flange turned over at a right angle to thebody of the tube without cracking or showing imperfectionsrejectable under the provisions of the product specification.The width of the flange
24、 shall not be less than 15 % of the tubediameter.6.1.2 The flanged specimen shall not exhibit through wallcracking or any cracking observable without magnification.6.2 Flattening Test:6.2.1 A length of tube not less than 4 in. (102 mm), shall beflattened under a load applied gradually at room temper
25、atureuntil the distance between the platens is five times the wallthickness. The weld shall be positioned 90 from the directionof the applied flattening force.6.2.2 The flattened specimen shall not exhibit cracks.6.2.3 Superficial ruptures resulting from surface imperfec-tions shall not be a cause f
26、or rejection.6.3 Flare TestThe flare test shall consist of flaring a testspecimen with an expanding tool having an included angle of60 until the specified outside diameter has been increased by30 %. The flared specimen shall not exhibit cracking throughthe wall.6.4 Pressure (Leak Test):4Available fr
27、omAmerican Society for Nondestructive Testing (ASNT), P.O. Box28518, 1711 Arlingate Ln., Columbus, OH 43228-0518, http:/www.asnt.org.TABLE 1 Permissible Variations for Outside Diameter and Wall Thickness of Welded TubeA,BSpecified Outside Diameter Outside DiameterPermissible Variationsof Thickness o
28、fSpecified Nominal Wall, %Thickness ofSpecified Minimum Wall,%in. (mm) + + + Over 0.125 (3.2) to58 (16), excl 0.004 (0.13) 0.005 (0.10) 12.5 12.5 28 058 (16) to 112 (38), incl 0.0075 (0.19) 0.0075 (0.19) 12.5 12.5 28 0Over 112 (38) to 3 (76), incl 0.010 (0.25) 0.010 (0.25) 12.5 12.5 28 0Over 3 (76)
29、to 412 (114), incl 0.015 (0.38) 0.015 (0.38) 12.5 12.5 28 0Over 412 (114) to 6 (152), incl 0.020 (0.51) 0.020 (0.51) 12.5 12.5 28 0AThese permissible variations in outside diameter apply only to material as finished at the mill before subsequent swaging, expanding, bending, polishing, or otherfabric
30、ating operations.BThe ovality provisions of 4.1 apply.TABLE 2 Permissible Variations in LengthAOutside Diameter, in. (mm) Cut Length, in. (mm)Over UnderCold-finished: under 2 (50.8)18 (3.2) 0Hot-finished: 2 (50.8) and over316 (4.8) 0all sizes316 (4.8) 0AThese permissible variations in length apply t
31、o tube in straight lengths. Theyapply to cut lengths up to and including 24 ft (7.3 m). For lengths over 24 ft anadditional over-tolerance of18 in. (3.2 mm) for each 10 ft (3.0 m) or fraction thereofshall be permissible up to a maximum additional over-tolerance of12 in. (12.7 mm).B751 08 (2013)26.4.
32、1 HydrostaticEach tube with an outside diameter18in. (3 mm) and larger, and with wall thickness of 0.015 in.(0.38 mm) and over, shall be tested by the manufacturer to aminimum internal hydrostatic pressure of 1000 psi (6.9 MPa)provided that the fiber stress calculated in accordance with thefollowing
33、 equation does not exceed the allowable fiber stress,S, indicated as follows:P 5 2St/D (1)where:P = hydrostatic test pressure, psi (MPa),S = allowable fiber stress, for material in the condition(temper) furnished as specified in the product specifi-cation (S is calculated as the lower of23 of the sp
34、ecifiedminimum 0.2 % offset yield strength or14 of thespecified minimum ultimate strength for the material),t = minimum wall thickness, in. (mm), equal to the speci-fied average wall minus the permissible minus walltolerance, or the specified minimum wall thickness, andD = outside diameter of the tu
35、be, in. (mm).6.4.1.1 The test pressure shall be held for a sufficient time topermit the entire length of the tube to be inspected.6.4.2 Pneumatic (Air Underwater) TestEach tube with anominal wall thickness exceeding 0.025 in. (0.64 mm) shall betested at a minimum pressure of 150 psi (1.05 MPa). The
36、testpressure for tubes having a nominal wall thickness of 0.025 in.(0.64 mm) and under shall be 75 psi (0.52 MPa) minimum. Thetest pressure shall be held for a minimum of 5 s. Visualexamination is to be made when the material is submerged andunder pressure. The full length of material must be examin
37、edfor leaks.6.4.3 If any tube shows leaks during hydrostatic or pneu-matic testing, it shall be rejected.6.5 Nondestructive Examination:6.5.1 Each tube shall be examined by a nondestructiveexamination method in accordance with Practices E213, E309,E426,orE571. Upon agreement, Practice E273 shall bee
38、mployed in addition to one of the full periphery tests. Therange of tube sizes that may be examined by each method shallbe subject to the limitations in the scope of that practice. Incase of conflict between these methods and practices and thisspecification, the requirements of this specification sh
39、all pre-vail6.5.2 The following information is for the benefit of the userof this specification.6.5.2.1 Calibration standards for the nondestructive electrictest are convenient standards for calibration of nondestructivetesting equipment only. For several reasons, including shape,orientation, width,
40、 etc., the correlation between the signalproduced in the electric test from an imperfection and fromcalibration standards is only approximate. A purchaser inter-ested in ascertaining the nature (type, size, location, andorientation) of discontinuities that can be detected in thespecific application
41、of these examinations should discuss thiswith the manufacturer of the tubular product.6.5.2.2 The ultrasonic examination referred to in this speci-fication is intended to detect longitudinal discontinuities havinga reflective area similar to or larger than the calibrationreference notches specified
42、in 6.5.8. The examination may notdetect circumferentially oriented imperfections or short, deepdefects.6.5.2.3 The eddy current examination referenced in thisspecification has the capability of detecting significantdiscontinuities, especially of the short abrupt type. PracticesE309 and E426 contain
43、additional information regarding thecapabilities and limitations of eddy-current examination.6.5.2.4 The hydrostatic test referred to in 6.4.1 is a testmethod provided for in many product specifications. This testhas the capability of finding defects of a size permitting the testfluid to leak throug
44、h the tube wall and may be either visuallyseen or detected by a loss of pressure. This test may not detectvery tight, through-the-wall defects or defects that extend anappreciable distance into the wall without complete penetra-tion.6.5.2.5 A purchaser interested in ascertaining the nature(type, siz
45、e, location, and orientation) of discontinuities that canbe detected in the specific application of these examinationsshould discuss this with the manufacturer of the tubularproducts.6.5.3 Time of Examination: Nondestructive examination forspecification acceptance shall be performed after all deform
46、a-tion processing, heat treating, welding, and straightening op-erations. This requirement does not preclude additional testingat earlier stages in the processing.6.5.4 Surface Condition:6.5.4.1 All surfaces shall be free of scale, dirt, grease, paint,or other foreign material that could interfere w
47、ith interpretationof test results. The methods used for cleaning and preparing thesurfaces for examination shall not be detrimental to the basemetal or the surface finish.6.5.4.2 Excessive surface roughness or deep scratches canproduce signals that interfere with the test.6.5.5 Extent of Examination
48、:6.5.5.1 The relative motion of the tube and thetransducer(s), coil(s), or sensor(s) shall be such that the entiretube surface is scanned, except for end effects as noted in6.5.5.2.6.5.5.2 The existence of end effects is recognized, and theextent of such effects shall be determined by the manufactur
49、er,and, if requested, shall be reported to the purchaser. Othernondestructive tests may be applied to the end areas, subject toagreement between the purchaser and the manufacturer.6.5.6 Operator Qualifications:6.5.6.1 The test unit operator shall be certified in accordancewith SNT-TC-1A, or an equivalent documented standardagreeable to both purchaser and manufacturer.6.5.7 Test Conditions:6.5.7.1 For examination by the ultrasonic method, the mini-mum nominal transducer frequency shall be 2.0 MHz, and themaximum transducer size shall be 1.5 in. (38 mm
