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9255517888 Line 13:09:18 03-10-2014 14/17 "fit'' AWA53M — 12 B1.20.1. The coupling shall be applied handling-tight, unless measured as the gap between the lowest point of the dent and power-tight is specified in the purchase order.Couplings are to a prolongation of the original contour of the pipe.Cold-formed be made of steel.Taper-tapped couplings shall be furnished on dents deeper than 1/8 in. [3 mm]shall be free of sharp-bottomed all threaded pipe NPS 21/2 [DN 65] or larger.For pipe smaller gouges; it shall be permissible to remove the gouges by than NPS 21/2 [DN 65], it is regular practice to furnish grinding,provided that the remaining wall thickness is within straight-tapped couplings for standard-weight pipe and taper- specified limits. The length of the dent in any direction shall tapped couplings for extra-strong and double extra-strong not exceed one half the specified outside diameter of the pipe. weight pipe. If taper-tapped couplings are required for 13. Number of Tests standard-weight pipe smaller than NPS 21/2 [DN 65], it is recommended that line pipe threads in accordance with API 13.1 Except as required by 13.2, one of each of the tests Specification 5B be ordered. The taper-tapped couplings pro- specified in Section 7 shall be made on test specimens taken vided on line pipe in such sizes may be used on mill-threaded from one length of pipe from each lot of each pipe size. For standard-weight pipe of the same size. continuous-welded pipe,each lot shall contain no more than 25 tons [23 Mg] of pipe for pipe sizes NPS 11/2 [DN 40] and 12. Workmanship, Finish, and Appearance smaller, and no more than 50 tons [45 Mg] of pipe for pipe 12.1 The pipe manufacturer shall explore a sufficient num- sizes larger than NPS 1'/2 [DN 40]. For seamless and electric- bei of visual surface imperfections to provide reasonable resistance-welded pipe, a lot shall contain no more than one heat, and at the option of the manufacturer shall contain no assurance that they have been properly evaluated with respect more than 500 lengths of pipe (as initially cut after the final to depth. pipe-forming operation, prior to any further cutting to the 12.2 Surface imperfections that penetrate more than 12.5% required ordered lengths) or 50 tons [45 Mg] of pipe. of the specified wall thickness or encroach on the minimum 13.2 The number of flattening tests for electric-resistance- wall thickness shall be considered defects. Pipe with defects welded pipe shall be in accordance with 7.3.3.2 or 7.3.3.3, shall be given one or more of the following dispositions: whichever is applicable. 12.2.1 The defect shall be removed by grinding, provided that the remaining wall thickness is within specified limits, 13.3 Except as allowed by 9.2,each length of pipe shall be 12.2.2DjPe S pipe and the parent metal of Type E pipe, subjected to the hydrostatic test (see Section 8). except within 1/2 in. [13 tarn] of the fusion line of the 14. Retests electric-resistance-weld seam, are permitted to be repaired in 14.1 Except for flattening tests of electric-resistance-welded accordance with the welding provisions of '12.5. Repair weld- pipe,if the results of a mechanical test for a lot fail to conform ing of Type F pipe and the weld seam of Type E pipe is to the applicable requirements specified in Section 7, the lot prohibited. shall be rejected unless tests of additional pipe from the 12.2.3 The section of pipe containing the defect shall be cut affected lot of doable the number originally tested are subse- off within the limits of requitement on length, or quently made and each such test conforms to the specified 12.2.4 Rejected. requirements.Only one retest of any lot will be permitted.Any 12.3 At the purchaser's discretion,pipe shall be subjected to individual length of'pipe that conforms to the test requirements rejection if surface defects repaired in accordance with 12.2 are is acceptable. Any individual length of pipe that does not not scattered, but appear over a large area in excess of what is conform to the test requirements may be resubmitted for test considered a workmanlike finish.Disposition of such pipe shall and will be considered acceptable if tests taken from each pipe be a matter of agreement between the manufacturer and the end conform to the specified requirements. purchaser. 14.2 Electric-Resistance-Welded Pipe Produced in Single 12.4 For the removal of imperfections and defects by Lengths—If any flattening test result fails to conform to the grinding,a smooth curved surface shall be maintained,and the requirements specified in 7.3.3,the affected single length shall wall thickness shall not be decreased below that permitted by be rejected unless the failed end is subsequently retested using this specification. It shall be permissible to reduce the outside the same weld orientation as the failed test and a satisfactory diameter at the point of grinding by the amount so removed. test result is obtained before the pipe's length is reduced by 12.4.1 Wall thickness measurements shall be made with a such testing to less than 80% of its length after the initial mechanical caliper or with a properly calibrated nondestructive cropping. testing device of appropriate accuracy.In the case of a dispute, 14.3 Electric-Resistance-Welded Pipe Produced in Multiple the measurement determined by use of the mechanical caliper Lengths—If any flattening test result fails to conform to the shall govern. requirements specified in 7.3.3, the affected multiple length 12.5 Weld repair shall only be permitted with the approval shall be rejected or flattening tests shall be made using a test of the purchaser and in accordance with Specification A530/ specimen taken from each end of each individual length in the A530M. failed multiple length. For each pipe end, such tests shall be 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 1/4 in. [6 mm], whichever is smaller, requirements. Copyright by ASTM Int'I(all rights reserved);Tue Nov 6 09:27:19 EST 2012 7 Downloaded/printed by p Received T i m e r'M a r. 10. Si12 014 u'12: 5 3 P M A N o. 5384 further reproductions authorized.