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<br /> c ' A53/A53M - 12
<br /> TABLE 1 Chemical Requirements
<br /> Composition,max
<br /> Carbon Manganese Phosphorus Sulfur Copper" NickelA ChromiumA Molybdenum" Vanadium
<br /> Type S(seamless pipe)
<br /> Grade A 0.25a 0.95 0.05 0.045 0.40 0.40 0.40 0.15 0.08
<br /> Grade B 0.30' 1.20 0.05 0.045 0.40 0.40 0.40 0.15 0.08
<br /> Type E(electric-resistance-welded)
<br /> Grade A 0.25B 0.95 0.05 0.045 0.40 0.40 0.40 0.15 0.08
<br /> Grade B 0.300 1.20 0.05 0.045 0.40 0.40 0.40 0.15 0.08
<br /> Type F(furnace-welded pipe)
<br /> Grade A 0.30 1.20 0.05 0.045 0.40 0.40 0.40 0.15 0.08
<br /> A The total composition for these five elements shall not exceed 1.00%.
<br /> 'For each reduction of 0.01%below the specified carbon maximum,an increase of 0.06%manganese above the specified maximum wifl be permitted up to a maximum
<br /> of 1.35%.
<br /> 'For each reduction of 0.01%below the specified carbon maximum,an increase of 0.06%manganese above the specified maximum will be permitted up to a maximum
<br /> of 1.65%.
<br /> 7.1.1 For tension tests other than transverse weld tension 7.2.2 If ordered for close coiling, the pipe shall stand being
<br /> tests, the yield strength corresponding to a permanent offset of bent cold through 180° around a cylindrical mandrel, the
<br /> 0.2%of the gage length or to an extension of 0.5%of the gage diameter of which is eight times the specified outside diameter
<br /> length under load, the tensile strength, and the elongation in 2 of the pipe, without failure.
<br /> in. or 50 mm shall be determined, and the tension test results 7.2.3 Double-extra-strong pipe over NPS I'/4[DN 32]need
<br /> shall conform to the applicable tensile property requirements not be subjected to the bend test.
<br /> given in Table 2.
<br /> 7.1.2 For transverse weld tension tests, the tensile strength 7.3 Flattening Test:
<br /> shall be determined, and the tension test results shall conform 7.3.1 The flattening test shall be made on welded pipe over
<br /> to the applicable tensile strength requirement given in Table 2. NPS 2 [DN 50] in extra-strong weight or lighter.
<br /> 7.1.3 Electric-resistance-welded pipe NPS 8 [DN 200] or 7.3.2 Seamless Pipe:
<br /> larger shall be tested using two transverse test specimens, one 7.3.2.1 Although testing is not required, pipe shall be
<br /> taken across the weld and one taken opposite the weld. capable of meeting the flattening test requirements of Supple-
<br /> 7.1.4 Transverse tension test specimens shall be approxi- mentary Requirement S1, if tested.
<br /> mately 1'/2 in. [38 mm] wide in the gage length and shall 7,3.3 Electric-Resistance Welded Pipe:
<br /> represent the full wall thickness of the pipe frorn which the test 7.3.3.1 A test specimen at least 4 in. [100 mm] in length
<br /> specimens were cut, shall be flattened cold between parallel plates in three steps,
<br /> 7.2 Bend Test: with the weld located either 0°or 90°from the line of direction
<br /> 7.2.1 For pipe NPS 2[DN 501 or smaller,a sufficient length of force as required by 7.3.3.2 or 7.3.3.3, whichever is
<br /> of pipe shall be capable of being bent cold through 90°around applicable.During the first step, which is a test for ductility of
<br /> a cylindrical mandrel,the diameter of which is twelve times the the weld,except as allowed by 7.3.5,7.3.6,and 7.3,7,no cracks
<br /> specified outside diameter of the pipe, without developing or breaks on the inside or outside surface at the weld shall be
<br /> cracks at any portion and without opening the weld. present before the distance between the plates is less than two
<br /> thirds of the specified outside diameter of the pipe.As a second
<br /> TABLE 2 Tensile Requirements step, the flattening shall be continued as a test for ductility
<br /> Grade A Grade B away from the weld.During the second step,except as allowed
<br /> Tensile strength,min,psi[MPa) 48 000[3301 60 000[4151 by 7.3.6 and 7.3.7,no cracks or breaks on the inside or outside
<br /> Yield strength,min,psi[MPa) 30 000[2051 35 000[2401 surface away from the weld shall be present before the distance
<br /> Elongation in 2 in.or 50 mm AB AS between the plates is less than one third of the specified outside
<br /> 'The minimum elongation in 2 in. [50 mm] shall be that determined by the diameter of the pipe but is not less than five times the specified
<br /> following equation: wall thickness of the pipe.During the third step,which is a test
<br /> e=625000[19401A°2/U for soundness, the flattening shall be continued until the test
<br /> where: specimen breaks or the opposite walls of the test specimen
<br /> e - minimum elongation in 2 in,or 50 mm in percent,rounded to the nearest meet.Evidence of laminated or unsound material or of incorn-
<br /> percent, plete weld that is revealed by the flattening test shall be cause
<br /> A = the lesser of 0.75 In.2 1500 mm2]and the cross-sectional area of the e
<br /> tension test specimen,calculated using the specified outside diameter of for rejection.
<br /> the pipe,or the nominal width of the tension test specimen and the 7.3.3.2 For pipe produced in single lengths, the flattening
<br /> specified wall thickness of the pipe,with the calculated value test specified in 7.3.3.1 shall be made using a test specimen
<br /> rounded to the nearest 0.01 in. [1 mm 1,and P g P
<br /> U = specified minimum tensile strength,psi[MPa]. taken from each end of each length of pipe.The tests from each
<br /> 'See Table X4.1 or Table X4.2, whichever is applicable, for the minimum end shall be made alternately with the weld at 0° and at 90°
<br /> elongation values that are required for various combinations of tension test from the line of direction of force.
<br /> specimen size and specified minimum tensile strength. 7.3.3.3 For pipe produced in multiple lengths,the flattening
<br /> test specified in 7.3.3.1 shall be made as follows:
<br /> Copyright by ASTM Intl(all rights reserved);Tue Nov 6 09:27:19 EST 2012 3
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