A 523 – 96 ;QTUYMY05NG__

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Designation: A 523 – 96 An American National Standard Standard Specification for Plain End Seamless and Electric-Resistance-Welded Steel Pipe for High-Pressure Pipe-Type Cable Circuits 1 This standard is issued under the fixed designation A 523; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) in

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  Designation: A 523 – 96  An American National Standard Standard Specification for Plain End Seamless and Electric-Resistance-Welded SteelPipe for High-Pressure Pipe-Type Cable Circuits 1 This standard is issued under the fixed designation A 523; 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 covers seamless and electric-resistance-welded steel pipe used as conduit for the installationof high-pressure pipe-type electrical cables in NPS 4 to NPS12, inclusive, with nominal (average) wall thicknesses 0.219 to0.562 in., depending on size. Pipe having other dimensions(Note 2) may be furnished, provided such pipe complies withall other requirements of this specification. N OTE  1—The dimensionless designator NPS (nominal pipe size) hasbeen substituted in this standard for such traditional terms as “nominaldiameter,” “size,” and “nominal size.”N OTE  2—A comprehensive listing of standardized pipe dimensions iscontained in ANSI B36.10. 1.2 Pipe ordered under this specification is suitable forwelding and for forming operations involving flaring, belling,and bending.1.3 Pipe for this purpose shall be furnished in Grade A orGrade B as specified in the purchase order. Grade A is moresuitable for forming operations involving bending, flaring, orbelling and this grade is normally preferred. This provision isnot intended to prohibit the cold bending, flaring, or belling of Grade B pipe.1.4 The values stated in inch-pound units are to be regardedas the standard.1.5 The following hazard caveat applies to the test methodportion, Section 20, of this specification:  This standard doesnot purport to address all of the safety problems, if any,associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations prior to use. 2. Referenced Documents 2.1  ASTM Standards: A 370 Test Methods and Definitions for Mechanical Testingof Steel Products 2 A 751 Test Methods, Practices, and Terminology forChemical Analysis of Steel Products 2 E 59 Method of Sampling Steel and Iron for Determinationof Chemical Composition 3 2.2  ANSI Standard: B36.10 Welded and Seamless Wrought Steel Pipe 4 3. Ordering Information 3.1 Orders for material under this specification shouldinclude the following, as required, to describe the desiredmaterial adequately:3.1.1 Quantity (feet or number of lengths),3.1.2 Name of material (steel pipe),3.1.3 Method of manufacture (seamless or electric-resistance-welded),3.1.4 Grade (Table 1),3.1.5 Size (outside diameter and nominal wall thickness orweight per foot),3.1.6 Length when other than specified in Section 13,3.1.7 End finish (Section 16),3.1.8 Skelp for tension tests, if permitted 20.2,3.1.9 When mill applied coating is required (Section 10),and3.1.10 ASTM specification number. 4. Process 4.1 The steel shall be made by one or more of the followingprocesses: open-hearth, basic-oxygen, or electric-furnace.4.2 Steel may be cast in ingots or may be strand cast. Whensteels of different grades are sequentially strand cast, identifi-cation of the resultant transition material is required. Theproducer shall remove the transition material by any estab-lished procedure that positively separates the grades. 5. Chemical Composition 5.1 The steel shall conform to the requirements as tochemical composition prescribed in Table 2 and the chemicalanalysis shall be in accordance with Test Methods, Practices, 1 This specification is under the jurisdiction of ASTM Committee A-1 on Steel,Stainless Steel, and RelatedAlloys, and is the direct responsibility of SubcommitteeA01.09 on Steel Pipe.Current edition approved Oct. 10, 1996. Published November 1997. Originallypublished as A 523 – 64. Last previous edition A 523 – 93.This specification was initiated by the IEEE Insulated Conductors Committee inrecognition of the need for a specification embodying the special requirements of pipe for high-voltage electrical circuits. It was prepared for acceptance as an ASTMspecification by a task group of Subcommittee A01.09 of ASTM Committee A-1. 2  Annual Book of ASTM Standards , Vol 01.03. 3  Annual Book of ASTM Standards , Vol 03.05. 4 Available from American National Standards Institute, 11 West 42nd St., 13thFloor, New York, NY 10036. 1 AMERICAN SOCIETY FOR TESTING AND MATERIALS100 Barr Harbor Dr., West Conshohocken, PA 19428Reprinted from the Annual Book of ASTM Standards. Copyright ASTM NOTICE:¬This¬standard¬has¬either¬been¬superseded¬and¬replaced¬by¬a¬new¬version¬ordiscontinued.¬Contact¬ASTM¬International¬(www.astm.org)¬for¬the¬latest¬information.  and Terminology A 751. 6. Heat Analysis 6.1 When specified in the purchase order, the manufacturershall report the heat analysis of each heat of steel used in themanufacture of pipe to this specification. The analysis shallconform to the requirements specified in Section 5 for thegrade of pipe ordered. 7. Product Analysis 7.1 When specified in the purchase order, a product analysisreport shall be furnished by the manufacturer on two pipesfrom each lot of 400 lengths, or fraction thereof, of 4 1  ⁄  2 -in.outside diameter and 5 9  ⁄  16 -in. outside diameter sizes and fromeach lot of 200 lengths, or fraction thereof, of each size 6 5  ⁄  8 -in.outside diameter through 12 3  ⁄  4 -in. outside diameter pipe.Samples for chemical analysis, except for spectrographicanalysis, shall be taken in accordance with Method E 59. Thechemical composition thus determined shall conform to therequirements specified in Section 5.7.2  Product Analysis Retests —If both lengths of pipe rep-resenting the lot fail the specified product analysis, the lot shallbe rejected, or at the option of the manufacturer, all of theremaining lengths of the lot shall be tested individually forconformance to the specified requirements. If only one of thelengths of pipe representing the lot fails the specified check analysis, the lot shall be rejected or, at the option of themanufacturer, two retest analyses shall be made on twoadditional lengths selected from the same lot. If both of theseretest analyses conform to the specified requirements, the lotshall be accepted except for the length which failed on theinitial analysis. If one or both of the retest analyses fail thespecified requirements, the entire lot shall be rejected, or, at theoption of the manufacturer, each of the remaining lengths shallbe tested individually. Only analysis of the rejecting element orelements is necessary in checking the remaining lengths. 8. Tensile Requirements 8.1 The material shall conform to the requirements as totensile properties prescribed in Table 1.8.2 The yield point shall be determined by the drop of thebeam or by the halt in the gage of the testing machine, by theuse of dividers, or by other approved methods. When a definiteyield point is not exhibited, the yield strength corresponding toa permanent offset of 0.2 % of the gage length of the specimenor to a total extension of 0.5 % of the gage length of thespecimen under load shall be determined.8.3 The test specimen taken across the weld shall show atensile strength not less than the minimum tensile strengthspecified for the grade of pipe ordered. This test will not berequired for pipe under NPS 8. 9. Flattening Test Requirements 9.1  Seamless Pipe —For seamless pipe, a section not lessthan 2 1  ⁄  2  in. (63.5 mm) in length shall be flattened cold betweenparallel plates in two steps. During the first step, which is a testfor ductility, no cracks or breaks on the inside or outside or endsurfaces, except as provided for in 9.5, shall occur until thedistance between the plates is less than the value of   H  calculated by the following equation:  H   5  ~ 1 1 e ! t e 1 t  D (1) where:  H   5  distance between flattening plates, in. (mm), TABLE 1 Tensile Requirements Grade A Grade BTensile strength, min, ksi (MPa) 48 (330) 60 (415)Yield strength, min, ksi (MPa) 30 (205) 35 (240)Elongation in 2 in. or 50 mm, %:Basic minimum elongation for walls  5  ⁄  16  in. (7.94mm) and over in thickness, longitudinal striptests, and for small sizes tested in full section.35 30When standard round 2-in. or 50-mm gage lengthtest specimen is used28 22For longitudinal strip tests, the width of the gagesection shall be 1 1  ⁄  2  in. (38.1 mm) and adeduction for each  1  ⁄  32  in. (0.79 mm) decrease inwall thickness below  5  ⁄  16  in. (7.94 mm) from thebasic minimum elongation of the followingpercentage points1.75 A 1.50 AA The following table B gives the minimum computed values:Wall Thickness Elongation in 2 in. or 50mm, min, %in. mm Grade A Grade B 5  ⁄  16  (0.312) 7.94 35.0 30.0 9  ⁄  32  (0.281) 7.14 33.2 28.5 1  ⁄  4  (0.250) 6.35 31.5 27.0 7  ⁄  32  (0.219) 5.56 29.8 25.5 3  ⁄  16  (0.188) 4.76 28.0 24.0 5  ⁄  32  (0.156) 3.97 26.2 22.5 1  ⁄  8  (0.125) 3.18 24.5 21.0 3  ⁄  32  (0.094) 2.38 22.8 19.5 1  ⁄  16  (0.062) 1.59 21.0 18.0 B  This table gives the computed minimum elongation values for each  1  ⁄  32  in.(0.79 mm) decrease in wall thickness. Where the wall thickness lies between twovalues shown above, the minimum elongation value shall be determined by thefollowing equation:Grade EquationAB E   5  56 t   + 17.50 E   5  48 t   + 15.00where: E   5  elongation in 2 in. or 50 mm, %, and t   5  actual thickness of specimen, in. TABLE 2 Chemical Requirements Composition, %Carbon, max Manganese, maxPhosphorus, max Sulfur, maxHeat Product Heat Product Heat Product Heat ProductGrade ASeamless 0.22 0.25 0.90 0.95 0.035 0.045 0.050 0.060E.R.W. A 0.21 0.25 0.90 0.95 0.035 0.045 0.050 0.060Grade BSeamless 0.27 0.30 1.15 1.20 0.035 0.045 0.050 0.060E.R.W. A 0.26 0.30 1.15 1.20 0.035 0.045 0.050 0.060 A Electric-Resistance-Welded pipe. A 523 2  e  5  deformation per unit length (constant for a givengrade of steel, 0.09 for Grade A and 0.07 for Grade B), t   5  specified wall thickness, in. (mm), and  D  5  specified outside diameter, in. (mm), andDuring the second step, which is a test for soundness, theflattening shall be continued until the specimen breaks or theopposite walls of the pipe meet. Evidence of laminated orunsound material that is revealed during the entire flatteningtest shall be cause for rejection.9.2  Electric-Resistance-Welded Pipe —Aspecimen at least 4in. (101.6 mm) in length shall be flattened cold betweenparallel plates in three steps with the weld located either 0 or90° from the line of direction of force as required in 9.2.1during the first step, which is a test for ductility of the weld, nocracks or breaks on the inside or outside surfaces shall occuruntil the distance between the plates is less than two thirds of the srcinal outside diameter of the pipe. As a second step, theflattening shall be continued. During the second step, which istest for ductility exclusive of the weld, no cracks or breaks onthe inside or outside surfaces, except as provided for in 9.5,shall occur until the distance between the plates is less than onethird of the srcinal outside diameter of the pipe but is not lessthan five times the wall thickness of the pipe. During the thirdstep, which is a test for soundness, the flattening shall becontinued until the specimen breaks or the opposite walls of thepipe meet. Evidence of laminated or unsound material or of incomplete weld that is revealed during the entire flattening testshall be cause for rejection.9.2.1 For pipe produced in single lengths, the flattening testspecified in 9.2 shall be made on both crop ends cut from eachlength of pipe. The tests from each end shall be madealternately with the weld at 0° and at 90° from the line of direction of force. For pipe produced in multiple lengths, theflattening test shall be made on crop ends representing the frontand back of each coil with the weld at 90° from the line of direction of force, and on two intermediate rings representingeach coil with the weld 0° from the line of direction of force.9.3 Surface imperfections in the test specimen beforeflattening, but revealed during the first step of the flatteningtest, shall be judged in accordance with the finish requirementsin Section 15.9.4 Superficial ruptures as a result of surface imperfectionsshall not be cause for rejection.9.5 When low  D -to- t   ratio tubulars are tested, because thestrain imposed due to geometry is unreasonably high on theinside surface at the 6 and 12 o’clock locations, cracks at theselocations shall not be cause for rejection if the  D -to- t   ratio isless than 10. 10. Coatings 10.1 Unless otherwise specified, the pipe shall not be givena mill coating of paint, oil, or any other material either insideor outside. 11. Dimensions and Weight 11.1 Dimensions and weight of pipe included in thisspecification are listed in Table 3. 12. Dimensions, Weight, and Permissible Variations 12.1  Weight  —The weight of the pipe as specified in Table 3shall not vary by more than the following amounts:Extra-strong and lighter wall thickness  6 5 %Minimum permissible length  6 10 %12.2  Diameter  —The outside diameter shall not vary morethan plus or minus 1 % from the diameter specified. Pipe NPS10 and smaller shall not be more than  1  ⁄  64  in. (0.4 mm) smallerand NPS 12 pipe shall not be more than  1  ⁄  32 -in. (0.8-mm)smaller than the tabulated outside diameter for a distance of 4in. (101.6 mm) from the end. The pipe shall permit passageover the ends for a distance of 4 in. of a ring gage having a bore 1  ⁄  16 -in. larger than the tabulated diameter of NPS 10 andsmaller pipe, and a bore  3  ⁄  32  in. (2.4 mm) larger for NPS 12pipe.12.3  Thickness —The minimum wall thickness at any pointshall not be more than 12.5 % under, or the maximumthickness more than 15.0 % over, the nominal wall thicknessspecified. 13. Lengths 13.1 Unless otherwise specified in the purchase order, the TABLE 3 Dimensions, Weight, and Test Pressures NPSDesig-natorOutsideDi-ameter,in.WallThicknessNominalWeightTest PressureGrade A Grade Bin. mm lb/ft kg/m psi MPa psi MPa4 4 1  ⁄  2  0.237 6.02 10.79 16.1 1900 13.10 2200 15.170.250 6.35 11.35 16.9 2000 13.79 2300 15.860.281 7.14 12.66 18.8 2200 15.17 2500 17.240.312 7.92 13.96 20.7 2500 17.24 2500 17.245 5 9  ⁄  16  0.219 5.56 12.50 18.6 1400 9.65 1700 11.720.258 6.55 14.62 21.8 1700 11.72 1900 13.100.281 7.14 15.85 23.6 1800 12.41 2100 14.480.312 7.92 17.50 26.0 2000 13.79 2400 16.550.344 8.74 19.17 28.6 2200 15.17 2500 17.246 6 5  ⁄  8  0.250 6.35 17.02 25.3 1400 9.65 1600 11.030.280 7.11 18.97 28.2 1500 10.34 1800 12.410.312 7.92 21.04 31.3 1700 11.72 2000 13.790.344 8.74 23.08 34.3 1900 13.10 2200 15.170.375 9.52 25.03 37.2 2000 13.79 2400 16.550.500 A 12.70 A 32.71 A 48.7 A 2500 17.24 2500 17.248 8 5  ⁄  8  0.250 6.35 22.36 33.3 1000 6.89 1200 8.270.277 7.04 24.70 36.8 1200 8.27 1300 8.960.312 7.92 27.70 41.2 1300 8.96 1500 10.340.322 8.18 28.55 42.6 1300 8.96 1600 11.030.344 8.74 30.42 45.3 1400 9.65 1700 11.720.375 9.52 33.04 49.2 1600 11.03 1800 12.410.438 11.13 38.30 57.0 1800 12.41 2100 14.480.500 12.70 43.39 64.6 2100 14.48 2400 16.5510 10 3  ⁄  4  0.250 6.35 28.04 41.7 850 5.86 1000 6.890.279 7.09 31.20 46.4 1000 6.89 1200 8.270.307 7.80 34.24 50.9 1000 6.89 1200 8.270.344 8.74 38.23 56.9 1100 7.58 1300 8.960.365 9.27 40.48 60.2 1200 8.27 1400 9.650.438 11.13 48.24 71.6 1500 10.34 1700 11.720.500 12.70 54.74 8.15 1700 11.72 2000 13.790.562 A 14.27 A 61.15 A 91.0 A 1900 13.10 2200 15.1712 12 3  ⁄  4  0.250 6.35 33.38 49.7 700 4.83 800 5.520.281 7.14 37.42 55.7 800 5.52 950 6.550.312 7.92 41.45 61.7 900 6.21 1000 6.890.330 8.38 43.77 65.1 1000 6.89 1200 8.270.344 8.74 45.58 67.8 1000 6.89 1200 8.270.375 9.52 49.56 73.7 1100 7.58 1200 8.270.438 11.13 57.59 86.7 1200 8.27 1400 9.650.500 12.70 65.42 97.3 1400 9.65 1600 11.030.562 A 14.27 A 73.15 A 108.8 A 1600 11.03 1900 13.10 A Designates weights heavier than extra-strong. A 523 3  finished length of pipe for the entire shipment shall conform tothe following:Minimum permissible length 35 ft 0 in. (10..7 m)Maximum permissible length 50 ft 0 in. (15.2 m) 14. Jointers 14.1 Jointers shall not be permitted. 15. Workmanship 15.1 The condition of the inside of the pipe is of utmostimportance to avoid damage to the cable during installation.15.2 The pipe bore shall be smooth and free of protrudingweld beads, slivers, or any other projections that cannot bereadily removed with a power wire brush or by shot, sand, orgrit blasting. The internal finish of the longitudinal seam of electric-resistance-welded pipe shall be smooth and free of sharp edges and sharp grooves. The interior of all pipes shall befree of loose scale. Pipe ends shall not be rounded out byhammering.15.3 The finished pipe shall be reasonably straight and freeof laminations and defects. Any imperfection shall beconsidered a defect when the depth is in excess of 12 1  ⁄  2  % of the tabulated wall thickness of the pipe. 16. End Finish 16.1 When pipe ends are to be flared for butt-welding withthe use of backing rings, the ends shall be beveled to an angleof 30 +5, −0° measured from a line drawn perpendicular to theaxis of the pipe, and with a root face of   1  ⁄  16 6  1  ⁄  32  in. (1.6  6  0.8mm). The pipe ends shall have burrs removed from both theinside and outside edges.16.2 When pipe ends are to be prepared for bell and spigot jointing, the ends shall be cut square with the axis of the pipe.The inside and outside edges shall be smooth and free of burrs. 17. Repair of Defects 17.1 Repair of defects in seamless pipe and in the basemetal of welded pipe shall be permissible except where:17.1.1 More than one repair is required in any lengthequivalent to ten times the tabulated outside diameter of thepipe,17.1.2 Where the depth exceeds 33 1  ⁄  3  % of the tabulatedwall thickness, and17.1.3 Where the length of the defect, in which the depthexceeds 12 1  ⁄  2  % of the wall thickness, is greater than 25 % of the tabulated outside diameter of the pipe.17.2 All repairs shall be made by removing the defectcompletely, thoroughly cleaning the cavity, and then welding.Each length of repaired pipe shall be tested hydrostatically inaccordance with Section 19.17.3 No repair of the longitudinal weld is permitted. 18. Number of Tests and Retests 18.1 One of each of the tests specified in Sections 8 and 9,except 9.2 shall be made on one length of pipe from each lot of 500 lengths, or fraction thereof, of each size. A length isdefined as the length as ordered, except that in the case of orders for cut lengths shorter than single random, the term lotshall apply to the lengths as rolled, prior to cutting to therequired short lengths.18.2 The number of flattening tests required for electric-resistance-welded pipe shall be as given 9.2.118.3 Each length of pipe shall be subjected to thehydrostatic test specified in Section 19.18.4 If the results of the mechanical tests of any lot do notconform to the requirements specified in Sections 8 and9,except 9.2.1 retests may be made on additional pipe of doublethe original number tested from the same lot, each testconforming to the requirements specified.18.5 If any section of the pipe fails to comply with therequirements of 9.2 for pipe produced in single lengths, othersections may be cut from the same end of the same length untilsatisfactory tests are obtained, except that the finished pipeshall not be shorter than 80 % of its length after the initialcropping; otherwise, the length shall be rejected. For pipeproduced in multiple lengths, retests may be cut from each endof each individual length in the multiple. Such tests shall bemade with the weld alternately 0° and 90° from the line of direction of force. 19. Hydrostatic Test 19.1 Each length of pipe shall be tested at the mill to thehydrostatic pressures prescribed in Table 3. The hydrostaticpressure shall be maintained for not less than 5 s. 20. Test Methods 20.1 The test specimens and the tests required by thisspecification shall conform to those described in the latest issueof Test Methods and Definitions A 370. When impracticable topull a test specimen in full thickness, the standard 2-in. or50-mm gage length tension test specimen shown in Fig. 6 of Test Methods and Definitions A 370 may be used.20.2 The longitudinal tension test specimen shall be takenfrom the end of the pipe or, by agreement between themanufacturer and the purchaser, may be taken from the skelp,at a point approximately 90° from the weld, and shall not beflattened between gage marks. The sides of each specimen shallbe parallel between gage marks.20.3 Transverse weld test specimens from electric-weldedpipe shall be taken with the weld at the center of the specimen.All transverse test specimens shall be approximately 1 1  ⁄  2  in.(38.1 mm) wide in the gage length and shall represent the fullwall thickness of the pipe from which the specimen was cut.20.4 Test specimens for flattening tests shall consist of sections cut from a pipe. Specimens for flattening tests shall besmooth on the ends and free of burrs, except when made oncrop ends taken from welded pipe.20.5 All specimens shall be tested at room temperature. 21. Inspection 21.1 The inspector representing the purchaser shall haveentry, at all times while work on the contract of the purchaseris being performed, to all parts of the manufacturer’s worksthat concern the manufacture of the material ordered. Themanufacturer shall afford the inspector all reasonable facilitiesto satisfy him that the material is being furnished in accordancewith this specification.All tests and inspection shall be made atthe place of manufacture prior to shipment, unless otherwisespecified, and shall be conducted so as not to interfere A 523 4
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