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06a A 53/A 53M - 12.2 Surface imperfections that penetrate more than 12.5 % 13.2 The number of flattening tests for electric-resistance- of the specified wall thickness or encroach on the minimum welded pipe shall be in accordance with 7.3.3.2 or 7.3.3.3, wall thickness shall be considered defects. Pipe with defects whichever is applicable. shall be given one or more of the following dispositions: 13.3 Except as allowed by 9.2, each length of pipe shall be 12.2.1 The defect shall be removed by grinding, provided subjected to the hydrostatic test (see Section 8). that the remaining wall thickness is within specified limits, 12.2.2 Type S pipe and the parent metal of Type E pipe, 14. Retests except within 'h in. [13 mm] of the fusion line of the 14.1 Except for flattening tests of electric-resistance-welded electric-resistance-weld seam, are permitted to be repaired in pipe, if the results of a mechanical test for a lot fail to conform accordance with the welding provisions of 12.5. Repair weld- to the applicable requirements specified in Section 7, the lot ing of Type F pipe and the weld seam of Type E pipe is shall be rejected unless tests of additional pipe from the prohibited. affected lot of double the number originally tested are subse- 12.2.3 The section of pipe containing the defect shall be cut quendy made and each such test conforms to the specified off within the limits of requirement on length, or requirements.Only one retest of any lot will be permitted.Any 12.2.4 Rejected. individual length of pipe that conforms to the test requirements 12.3 At the purchaser's discretion,pipe shall be subjected to is acceptable. Any individual length of pipe that does not rejection if surface defects repaired in accordance with 12.2 are conform to the test requirements may be resubmitted for test not scattered,but appear over a large area in excess of what is and will be considered acceptable if tests taken from each pipe considered a workmanlike finish.Disposition of such pipe shall end conform to the specified requirements. be a matter of agreement between the manufacturer and the 14.2 Electric-Resistance-Welded Pipe Produced in Single purchaser. Lengths-If any flattening test result fails to conform to the 12.4 For the removal of imperfections and defects by requirements specified in 7.3.3,the affected single length shall grinding,a smooth curved surface shall be maintained,and the be rejected unless the failed end is subsequently retested using wall thickness shall not be decreased below that permitted by the same weld orientation as the failed test and a satisfactory this specification.It shall be permissible to reduce the outside test result is obtained before the pipe's length is reduced by diameter at the point of grinding by the amount so removed. such testing to less than 80% of its length after the initial 12.4.1 Wall thickness measurements shall be made with a cropping. mechanical caliper or with a properly calibrated nondestructive 14.3 Electric-Resistance-Welded Pipe Produced in Multiple testing device of appropriate accuracy. In the case of a dispute, Lengths-If any flattening test result fails to conform to the the measurement determined by use of the mechanical caliper requirements specified in 7.3.3, the affected multiple length shall govern. shall be rejected or flattening tests shall be made using a test 12.5 Weld repair shall only be permitted with the approval specimen taken from each end of each individual length in the of the purchaser and in accordance with Specification A.5301 failed multiple length. For each pipe end, such tests shall be A 530M. made with the weld alternately at 0° and 90° from the line of 12.6 The finished pipe shall be reasonably straight. direction of force.Individual lengths are considered acceptable 12.7 The pipe shall contain no dents greater than 10% of if the test results for both pipe ends conform to the specified the pipe diameter or '/4 in. [6 mm], whichever is smaller, requirements. measured as the gap between the lowest point of the dent and 15. Test Methods a prolongation of the original contour of the pipe.Cold-formed dents deeper than'/in.[3 mm]shall be free of sharp-bottomed 15.1 The test specimens and the tests required by this gouges; it shall be permissible to remove the gouges by specification shall conform to those described in the latest issue grinding, provided that the remaining wall thickness is within of Test Methods and Definitions A 370. specified limits. The length of the dent in any direction shall 15.2 Each longitudinal tension test specimen shall be taken not exceed one half the specified outside diameter of the pipe. from a pipe end and shall not be flattened between the gage marks. 13. Number of Tests 15.3 Test specimens for bend tests and flattening tests shall 13.1 Except as required by 13.2, one of each of the tests be taken from pipe.Test specimens for flattening tests shall be specified in Section 7 shall be made on test specimens taken smooth on the ends and free from burrs. from one length of pipe from each lot of each pipe size. For 15.4 Tests shall be conducted at room temperature. continuous-welded pipe,each tot shall contain no more than 25 tons [23 Mg] of pipe for pipe sizes NPS 1'/•- [DN 401 and 16. Lengths smaller, and no more than 50 tons [45 Mgt of pipe for pipe 16.1 Unless otherwise specified, pipe lengths shall be in sizes larger than NPS 1'/ [DN 401. For seamless and electric- accordance with the following regular practices: resistance-welded pipe, a lot shall contain no more than one 16.1.1 Except as allowed by 16.1.2 and 16.1.4,pipe lighter heat, and at the option of the manufacturer shall contain no than extra-strong weight shall be in single-random lengths of more than 500 lengths of pipe (as initially cut after the final 16 to 22 ft[4.88 to 6.71 m],with not more than 5 %of the total pipe-forming operation, prior to any further cutting to the number of threaded lengths furnished being jointers (two required ordered lengths) or 50 tons [45 Mg] of pipe. pieces coupled together). 7