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  Designation: A 671 – 06 Standard Specification for Electric-Fusion-Welded Steel Pipe for Atmospheric andLower Temperatures 1 This standard is issued under the fixed designation A 671; the number immediately following the designation indicates the year of srcinal adoption or, in the 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 2 covers electric-fusion-welded steelpipe with filler metal added, fabricated from pressure vesselquality plate of several analyses and strength levels andsuitable for high-pressure service at atmospheric and lowertemperatures. Heat treatment may or may not be required toattain the desired properties or to comply with applicable coderequirements. Supplementary requirements are provided foruse when additional testing or examination is desired.1.2 The specification nominally covers pipe 16 in. (405mm) in outside diameter or larger and of   1  ⁄  4  in. (6.4 mm) wallthickness or greater. Pipe having other dimensions may befurnished provided it complies with all other requirements of this specification.1.3 Several grades and classes of pipe are provided.1.3.1 Grade designates the type of plate used as listed in 5.1.1.3.2 Class designates the type of heat treatment performedduring manufacture of the pipe, whether the weld is radio-graphically examined, and whether the pipe has been pressuretested as listed in 1.3.3.1.3.3 Class designations are as follows (Note 1): Class Heat Treatment on Pipe Radiography,see SectionPressure Test,see:10 none none none11 none 9 none12 none 9 8.313 none none 8.320 stress relieved, see 5.3.1 none none21 stress relieved, see 5.3.1 9 none 22 stress relieved, see 5.3.1 9 8.323 stress relieved, see 5.3.1 none 8.3 30 normalized, see 5.3.2 none none31 normalized, see 5.3.2 9 none 32 normalized, see 5.3.2 9 8.333 normalized, see 5.3.2 none 8.3 40 normalized and tempered, see 5.3.3 none none41 normalized and tempered, see 5.3.3 9 none 42 normalized and tempered, see 5.3.3 9 8.343 normalized and tempered, see 5.3.3 none 8.3 50 quenched and tempered, see 5.3.4 none none51 quenched and tempered, see 5.3.4 9 none 52 quenched and tempered, see 5.3.4 9 8.353 quenched and tempered, see 5.3.4 none 8.3 60 normalized and precipitation heattreatednone none61 normalized and precipitation heattreated9 none62 normalized and precipitation heattreated9 8.363 normalized and precipitation heattreatednone 8.370 quenched and precipitation heattreatednone none71 quenched and precipitation heattreated9 none72 quenched and precipitation heattreated9 8.373 quenched and precipitation heattreatednone 8.3 N OTE  1—Selection of materials should be made with attention totemperature of service. For such guidance, SpecificationA 20/A 20M maybe consulted. 1.4 The values stated in inch-pound units are to be regardedas the standard. 2. Referenced Documents 2.1  ASTM Standards:  3 A 20/A 20M Specification for General Requirements forSteel Plates for Pressure VesselsA 370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA 435/A 435M Specification for Straight-Beam UltrasonicExamination of Steel PlatesA 530/A 530M Specification for General Requirements forSpecialized Carbon and Alloy Steel PipeA 577/A 577M Specification for Ultrasonic Angle-BeamExamination of Steel PlatesA 578/A 578M Specification for Straight-Beam UltrasonicExamination of Plain and Clad Steel Plates for SpecialApplicationsE 110 Test Method for Indentation Hardness of MetallicMaterials by Portable Hardness Testers 1 This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel, and Related Alloys and is the direct responsibility of SubcommitteeA01.09 on Carbon Steel Tubular Products.Current edition approved May 1, 2006. Published May 2006. Originallyapproved in 1972. Last previous edition approved in 2004 as A 671 – 04. 2 For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-671 in Section II of that Code. 3 For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at service@astm.org. For  Annual Book of ASTM Standards  volume information, refer to the standard’s Document Summary page onthe ASTM website. 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.  E 165 Test Method for Liquid Penetrant ExaminationE 709 Guide for Magnetic Particle Examination2.2  Plate Steels: A 203/A 203M Specification for Pressure Vessel Plates, Al-loy Steel, NickelA 285/A 285M Specification for Pressure Vessel Plates,Carbon Steel, Low- and Intermediate-Tensile StrengthA 299/A 299M Specification for Pressure Vessel Plates,Carbon Steel, Manganese-SiliconA 353/A 353M Specification for Pressure Vessel Plates, Al-loy Steel, 9 Percent Nickel, Double-Normalized and Tem-peredA 515/A 515M Specification for Pressure Vessel Plates,Carbon Steel, for Intermediate- and Higher-TemperatureServiceA 516/A 516M Specification for Pressure Vessel Plates,Carbon Steel, for Moderate- and Lower-Temperature Ser-viceA 517/A 517M Specification for Pressure Vessel Plates, Al-loy Steel, High-Strength, Quenched and TemperedA 537/A 537M Specification for Pressure Vessel Plates,Heat-Treated, Carbon-Manganese-Silicon SteelA 553/A 553M Specification for Pressure Vessel Plates, Al-loy Steel, Quenched and Tempered 8 and 9 % NickelA 736/A 736M Specification for Pressure Vessel Plates,Low-Carbon Age-Hardening Nickel-Copper-Chromium-Molybdenum-Columbium and Nickel-Copper-Manganese-Molybdenum-Columbium Alloy Steel2.3  ASME Boiler and Pressure Vessel Code: 4 Section II, Material SpecificationsSection III, Nuclear VesselsSection VIII, Unfired Pressure VesselsSection IX, Welding Qualifications 3. Terminology 3.1  Definitions of Terms Specific to This Standard: 3.1.1  lot  —a lot shall consist of 200 ft (61 m) or fractionthereof of pipe from the same heat of steel.3.1.2 The description of a lot may be further restricted bythe use of Supplementary Requirement S14. 4. Ordering Information 4.1 The inquiry and order for material under this specifica-tion should include the following information:4.1.1 Quantity (feet, metres, or number of lengths),4.1.2 Name of material (steel pipe, electric-fusionwelded),4.1.3 Specification number,4.1.4 Grade and class designations (see 1.3),4.1.5 Size (inside or outside diameter, nominal or minimumwall thickness),4.1.6 Length (specific or random),4.1.7 End finish (11.4),4.1.8 Purchase options, if any (see 5.2.3 and 11.3 of this specification. See also Specification A 530/A 530M), 4.1.9 Supplementary requirements, if any. 5. Materials and Manufacture 5.1  Materials —The steel plate material shall conform to therequirement of the applicable plate specification for the pipegrade ordered as listed in Table 1.5.2  Welding :5.2.1 The joints shall be double-welded, full-penetrationwelds made in accordance with procedures and by welders orwelding operators qualified in accordance with the ASMEBoiler and Pressure Vessel Code, Section IX.5.2.2 The welds shall be made either manually or automati-cally by an electric process involving the deposition of fillermetal.5.2.3 As welded, the welded joint shall have positivereinforcement at the center of each side of the weld, but nomore than  1  ⁄  8  in. (3.2 mm). This reinforcement may be removedat the manufacturer’s option or by agreement between themanufacturer and purchaser. The contour of the reinforcementshall be smooth and the deposited metal shall be fusedsmoothly and uniformly into the plate surface.5.2.4 When radiographic examination in accordance with9.1 is to be used, the weld reinforcements shall be governed bythe more restrictive provision UW–51 of Section VIII of theASME Boiler and Pressure Vessel Code instead of  5.2.3 of thisspecification.5.3  Heat Treatment  —All classes other than 10, 11, 12, and13 shall be heat treated in furnace controlled to 6 25 °F ( 6 14°C) and equipped with a recording pyrometer so that heating 4 Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990. TABLE 1 Plate Specifications Pipe Grade Type of Steel ASTM SpecificationNo. GradeCA 55 plain carbon A 285/A 285M CCB 60 plain carbon, killed A 515/A 515M 60CB 65 plain carbon, killed A 515/A 515M 65CB 70 plain carbon, killed A 515/A 515M 70CC 60 plain carbon, killed, fine grain A 516/A 516M 60CC 65 plain carbon, killed, fine grain A 516/A 516M 65CC 70 plain carbon, killed, fine grain A 516/A 516M 70CD 70 manganese-silicon, normalized A 537/A 537M 1CD 80 manganese-silicon, quenched andtemperedA 537/A 537M 2CF 65 nickel steel A 203/A 203M ACF 70 nickel steel A 203/A 203M BCF 66 nickel steel A 203/A 203M DCF 71 nickel steel A 203/A 203M ECG 100 9 % nickel A 353/A 353MCH 100 9 % nickel A 553/A 553M 1CJ 101 alloy steel, quenched and tempered A 517/A 517M ACJ 102 alloy steel, quenched and tempered A 517/A 517M BCJ 103 alloy steel, quenched and tempered A 517/A 517M CCJ 104 alloy steel, quenched and tempered A 517/A 517M DCJ 105 alloy steel, quenched and tempered A 517/A 517M ECJ 106 alloy steel, quenched and tempered A 517/A 517M FCJ 107 alloy steel, quenched and tempered A 517/A 517M GCJ 108 alloy steel, quenched and tempered A 517/A 517M HCJ 109 alloy steel, quenched and tempered A 517/A 517M JCJ 110 alloy steel, quenched and tempered A 517/A 517M KCJ 111 alloy steel, quenched and tempered A 517/A 517M LCJ 112 alloy steel, quenched and tempered A 517/A 517M MCJ 113 alloy steel, quenched and tempered A 517/A 517M PCK 75 carbon-manganese-silicon A 299/A 299MCP65 alloy steel, age hardening, normalizedand precipitation heat treatedA 736/A 736M 2CP75 alloy steel, age hardening, quenchedand precipitation heat treatedA 736/A 736M 3 A 671 – 06 2  records are available. Heat treating after forming and weldingshall be to one of the following:5.3.1 Classes 20, 21, 22, and 23 pipe shall be uniformlyheated within the post-weld heat-treatment temperature rangeindicated in Table 2 for a minimum of 1 h/in. of thickness or for1 h, whichever is greater.5.3.2 Classes 30, 31, 32, and 33, pipe shall be uniformlyheated to a temperature in the austenitizing range and notexceeding the maximum normalizing temperature indicated inTable 2 and subsequently cooled in air at room temperature.5.3.3 Classes 40, 41, 42, and 43 pipe shall be normalized inaccordance with 5.3.2. After normalizing, the pipe shall bereheated to the tempering temperature indicated in Table 2 as aminimum and held at temperature for a minimum of   1  ⁄  2  h/in. of thickness or for  1  ⁄  2  h, whichever is greater, and air cooled.5.3.4 Classes 50, 51, 52, and 53 pipe shall be uniformlyheated to a temperature in the austenitizing range, and notexceeding the maximum quenching temperature indicated inTable 2 and subsequently quenched in water or oil. Afterquenching, the pipe shall be reheated to the tempering tem-perature indicated in Table 2 as a minimum and held at thattemperature for a minimum of   1  ⁄  2  h/in. of thickness or for  1  ⁄  2  h,whichever is greater, and air cooled.5.3.5 Classes 60, 61, 62, and 63 pipe shall be normalized inaccordance with 5.3.2. After normalizing, the pipe shall beprecipitation heat treated in the range shown in Table 2 for atime to be determined by the manufacturer.5.3.6 Classes 70, 71, 72, and 73 pipe shall be uniformlyheated to a temperature in the austenitizing range, not exceed-ing the maximum quenching temperature indicated in Table 2,and subsequently quenched in water or oil.After quenching thepipe shall be reheated into the precipitation heat treating rangeindicated in Table 2 for a time to be determined by themanufacturer. 6.  General Requirements for Delivery  General Requirementsfor Delivery6.1 Material furnished to this specification shall conform tothe applicable requirements of the current edition of Specifi-cation A 530/A 530M unless otherwise provided herein. 7. Chemical Composition 7.1  Product Analysis of Plate —The pipe manufacturer shallmake an analysis of each mill heat of plate material. Theproduct analysis so determined shall meet the requirements of the plate specification to which the material was ordered.7.2  Product Analyses of Weld  —The pipe manufacturer shallmake an analysis of finished deposited weld material from each200 ft (61 m) or fraction thereof.Analyses shall conform to thewelding procedure for deposited weld metal. TABLE 2 Heat Treatment Parameters Pipe Grade A ASTM Specificationand GradePost-WeldHeat-TreatmentTemperature Range °F (°C)NormalizingTemperature, max,°F (°C)QuenchingTemperature,max, °F (°C)TemperingTemperature,min, °F (°C)PrecipitationHeat TreatmentTemperatureRange °F (°C)CA 55 A 285/A 285M (C) 1100–1250 (590–680) 1700 (925) ... ... ...CB 60 A 515/A 515M (60) 1100–1250 (590–680) 1750 (950) ... ... ...CB 65 A 515/A 515M (65) 1100–1250 (590–680) 1750 (950) ... ... ...CB 70 A 515/A 515M 1100–1250 (590–680) 1750 (950) ... ... ...CC 60 A 516/A 516M (60) 1100–1250 (590–680) B  1700 (925) 1650 (900) 1200 (650) C  ...CC 65 A 516/A 516M (65) 1100–1250 (590–680) B  1700 (925) 1650 (900) 1200 (650) ...CC 70 A 516/A 516M (70) 1100–1250 (590–680) B  1700 (925) 1650 (900) 1200 (650) ...CD 70 A 537/A 537M (1) 1100–1250 (590–680) 1700 (925) ... ... ...CD 80 A 537/A 537M (2) 1100–1250 (590–680) B  ... 1650 (900) 1100 (590) ...CF 65 A 203/A 203M (A) 1100–1175 (590–635) 1750 (950) ... ... ...CF 70 A 203/A 203M (B) 1100–1175 (590–635) 1750 (950) ... ... ...CF 66 A 203/A 203M (D) 1100–1175 (590–635) 1750 (950) ... ... ...CF 71 A 203/A 203M (E) 1100–1175 (590–635) 1750 (950) ... ... ...CG 100 A 353/A 353M 1025–1085 (550–580) 1650 (900) ... 1050 (560) ...CH 100 A 553/A 553M 1025–1085 (550–580) 1650 (900) ... 1050 (560) ...CJ 101 A 517/A 517M (A) 1000–1100 (540–590) ... 1725 (940) D  1150 (620) ...CJ 102 A 517/A 517M (B) 1000–1100 (540–590) ... 1725 (940) D  1150 (620) ...CJ 103 A 517/A 517M (C) 1000–1100 (540–590) ... 1725 (940) D  1150 (620) ...CJ 104 A 517/A 517M (D) 1000–1100 (540–590) ... 1725 (940) D  1150 (620) ...CJ 105 A 517/A 517M (E) 1000–1100 (540–590) ... 1725 (940) D  1150 (620) ...CJ 106 A 517/A 517M (F) 1000–1100 (540–590) ... 1725 (940) D  1150 (620) ...CJ 107 A 517/A 517M (G) 1000–1100 (540–590) ... 1725 (940) D  1150 (620) ...CJ 108 A 517/A 517M (H) 1000–1100 (540–590) ... 1725 (940) D  1150 (620) ...CJ 109 A 517/A 517M (J) 1000–1100 (540–590) ... 1725 (940) D  1150 (620) ...CJ 110 A 517/A 517M (K) 1000–1100 (540–590) ... 1725 (940) D  1150 (620) ...CJ 111 A 517/A 517M (L) 1000–1100 (540–590) ... 1725 (940) D  1150 (620) ...CJ 112 A 517/A 517M (M) 1000–1100 (540–590) ... 1725 (940) D  1150 (620) ...CJ 113 A 517/A 517M (P) 1000–1100 (540–590) ... 1725 (940) D  1150 (620) ...CK 75 A 299/A 299M 1100–1250 (590–680) 1700 (925) ... ... ...CP65 A 736/A 736M (2) 1000–1175 (540–635) 1725 (940) ... ... 1000–1200(540–650)CP75 A 736/A 736M (3) 1000–1175 (540–635) ... 1725 (940) ... 1000–1225(540–665) A Numbers indicate minimum tensile strength in ksi. B  In no case shall the post-weld heat-treatment temperature exceed the mill tempering temperature. C  Tempering range 1100 to 1300 (590 to 705), if accelerated cooling utilized per Specification A 516/A 516M. D  Per ASME Section VIII Specification A 517/A 517M specified 1650 (900) minimum quenching temperature. A 671 – 06 3  7.3 Analysis may be taken from the mechanical test speci-mens. The results of the analyses shall be reported to thepurchaser. 8. Mechanical Requirements 8.1  Tension Test  :8.1.1  Requirements—  —Transverse tensile properties of thewelded joint shall meet the minimum requirements for ultimatetensile strength of the specified plate material. In addition forGrades CD and CJ, when these are of Class 3x, 4x, or 5x, andGrade CP of Class 6x and 7x, the transverse tensile propertiesof the base plate shall be determined on specimens cut from theheat-treated pipe. These properties shall meet the mechanicaltest requirements of the plate specification.8.1.2  Number of Tests —One test specimen of weld metaland one specimen of base metal, if required by 8.1.1, shall be made and tested to represent each lot of finished pipe.8.1.3  Test Specimen Location and Orientation —The testspecimens shall be taken transverse to the weld at the end of the finished pipe and may be flattened cold before finalmachining to size.8.1.4  Test Method  —The test specimen shall be made inaccordance with QW-150 in Section IX of the ASME Boilerand Pressure Vessel Code. The test specimen shall be tested atroom temperature in accordance with Test Methods and Defi-nitions A 370.8.2  Transverse Guided Weld Bend Test  :8.2.1  Requirements —The bend test shall be acceptable if nocracks or other defects exceeding  1  ⁄  8  in. (3.2 mm) in anydirection are present in the weld metal or between the weld andthe base metal after bending. Cracks that srcinate along theedges of the specimen during testing, and that are less than  1  ⁄  4 in. (6.4 mm) measured in any direction shall not be considered.8.2.2  Number of Tests —One test (two specimens) shall bemade to represent each lot of finished pipe.8.2.3  Test Specimen Location and Orientation —Two bendtest specimens shall be taken transverse to the weld at the endof the finished pipe. As an alternative, by agreement betweenthe purchaser and the manufacturer, the test specimens may betaken from a test plate of the same material as the pipe, the testplate being attached to the end of the cylinder and welded as aprolongation of the pipe longitudinal seam.8.2.4  Test Method  —The test requirements of A 370, S9.1.7shall be met. For wall thicknesses over  3  ⁄  8  in. (9.5 mm) but lessthan  3  ⁄  4  in. (19.0 mm) side-bend tests may be made instead of the face and root-bend tests. For wall thicknesses  3  ⁄  4  in. andover both specimens shall be subjected to the side-bend test.8.3  Pressure Test  —Classes X2 and X3 pipe shall be testedin accordance with Specification A 530/A 530M, Section 6. 9. Radiographic Examination 9.1 The full length of each weld of Classes X1 and X2 shallbe radiographically examined in accordance with and meet therequirements of ASME Boiler and Pressure Vessel Code,Section VIII, Paragraph UW–51.9.2 Radiographic examination may be performed prior toheat treatment. 10. Rework 10.1  Elimination of Surface Imperfections —Unacceptablesurface imperfections shall be removed by grinding or machin-ing. The remaining thickness of the section shall be no less thanthe minimum specified in Section 11. The depression after grinding or machining shall be blended uniformly into thesurrounding surface.10.2  Repair of Base Metal Defects by Welding :10.2.1 The manufacturer may repair, by welding, base metalwhere defects have been removed, provided the depth of therepair cavity as prepared for welding does not exceed  1  ⁄  3  of thenominal thickness and the requirements of  10.2.2, 10.2.3, 10.2.4, 10.2.5 and 10.2.6 are met. Base metal defects in excess of these may be repaired with prior approval of the customer.10.2.2 The defect shall be removed by suitable mechanicalor thermal cutting or gouging methods and the cavity preparedfor repair welding.10.2.3 The welding procedure and welders or weldingoperators are to be qualified in accordance with Section IX of the ASME Boiler and Pressure Vessel Code.10.2.4 The full length of the repaired pipe shall be heattreated after repair in accordance with the requirements of thepipe class specified.10.2.5 Each repair weld of a defect where the cavity,prepared for welding, has a depth exceeding the lesser of   3  ⁄  8  in.(9.5 mm) or 10 % of the nominal thickness shall be examinedby radiography in accordance with the methods and theacceptance standards of Section 9.10.2.6 The repair surface shall be blended uniformly intothe surrounding base metal surface and examined and acceptedin accordance with Supplementary Requirements S6 or S8.10.3  Repair of Weld Metal Defects by Welding :10.3.1 The manufacturer may repair weld metal defects if hemeets the requirements of  10.2.3, 10.2.4, 10.3.2, 10.3.3 and 10.4.10.3.2 The defect shall be removed by suitable mechanicalor thermal cutting or gouging methods and the repair cavityexamined and accepted in accordance with SupplementaryRequirements S7 or S9.10.3.3 The weld repair shall be blended uniformly into thesurrounding metal surfaces and examined and accepted inaccordance with 9.1 and with Supplementary Requirements S7or S9.10.4  Retest  —Each length of repaired pipe of a class requir-ing a pressure test shall be hydrostatically tested followingrepair. 11. Dimensions, Mass and Permissible Variations 11.1 The wall thickness and weight for welded pipe fur-nished to this specification shall be governed by the require-ments of the specification to which the manufacturer orderedthe plate.11.2 Permissible variations in dimensions at any point in alength of pipe shall not exceed the following:11.2.1  Outside Diameter  —Based on circumferential mea-surement 6 0.5 % of the specified outside diameter.11.2.2  Out-of-Roundness —Difference between major andminor outside diameters, 1 %. A 671 – 06 4
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