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P A 53/A 53M—06a SUPPLEMENTARY REQUIREMENTS The following supplementary requirements shall apply only when specified in the purchase order. The purchaser may specify a different frequency of test than is provided in the supplementary requirement. Subject to agreement between the purchaser and manufacturer, retest and retreatment provisions of these supplementary requirements may also be modified. Sl. Flattening Test, Seamless Pipe S 1.4 Superficial ruptures as a result of surface imperfections S 1.1 A test specimen at least 21h in. [60 ntmj in length shall shall not be cause for rejection. be flattened cold between parallel plates in two steps. During 51.5 For pipe with a D-tar ratio less than 10, because the the first step,which is a test for ductility,except as allowed by strain imposed due to geometry is unreasonably high on the S 1.3,S 1.4,and S 1.5,no cracks or breaks on the inside,outside, inside surface at the 6 and 12 o'clock locations,cracks at such or end surfaces shall be present before the distance between the locations shall not be cause for rejection. plates is less than the value of H calculated as follows: SIA One test shall be made on test specimens taken from H=(I +e)t1(e+ (ID) one length of pipe from each lot of each pipe size.A lot shall where: contain no more than one heat, and at the option of the H = distance between flattening plates, in. [mmj, manufacturer shall contain no more than 500 lengths of pipe e = deformation per unit length (constant for a given grade (as initially cut after the final pipe-Forming operation, prior to of steel, 0.09 for Grade A, and 0.07 for Grade B), any further cutting to the required ordered lengths) or 50 tons t = specified wall thickness, in. [mm[, and [45 Mg] of pipe. D = specified outside diameter, in. (mm) 51.7 If the results of a test for a tot fail to conform to the applicable requirements,the lot shall be rejected unless tests of The H values have been calculated for standard-weight and additional pipe from the affected lot of double the number extra-heavy weight pipe from NPS 2'/2 to NPS 24 [DN 65 to originally tested are subsequently made and each such test DN 6001, inclusive, and are given in Table X2.1. conforms to the specified requirements.Only one retest of any S1.2 During the second step, which is a test for soundness, lot will be permitted. Any individual length of pipe that the flattening shall be continued until the test specimen breaks conforms to the test requirements is acceptable.Any individual laminated or or the opposite sides test shall unsound m the test specimen meet. Evidenceaterial that is revealed during the entire length of pipe that does not conform to the test requirements mmay be resubmitted for test and will be considered acceptable S1.3 Surface imperfections in the test specimen before Battening tecause for rejection. if tests taken from each pipe end conform to the specified flattening, but revealed during the first step of the flattening requirements. test,shall be judged in accordance with the finish requirements in Section 12. APPENDIXES (Nonmandatory Information) XI. DEFINITIONS OF TYPES OF PIPE X1.1 Type F, Furnace-Butt-Welded Pipe, Continuous- longitudinal butt joint wherein coalescence is produced by the Welded Pipe—Pipe produced in multiple lengths from coiled heat obtained from resistance of the pipe to the flow of electric skelp and subsequently cut into individual lengths, having its current in a circuit of which the pipe is a part, and by the longitudinal buttjoint forge welded by the mechanical pressure application of pressure. developed in rolling the hot-formed skelp through a set of round pass welding rolls. X1.3 Type S. Seamless Pipe—Pipe made without a welded X 1.2 Type E. Electric-Resistance-Welded Pipe—Pipe pro- seam.It is manufactured by hot working steel and,if necessary, duced in single lengths, or in multiple lengths from coiled by subsequently cold finishing the hot-worked tubular product skelp and subsequently cut into individual lengths, having a to produce the desired shape, dimensions, and properties. 10