ASTM A524:17 pdf download

ASTM A524:17 pdf download.Standard Specification for Seamless Carbon Steel Pipe for Atmospheric and Lower Temperatures.
NOTE 5—Marks and abrasions arc defined as cable marks, dinges, guide marks, roll marks, ball scratches, scores, die marks, and the like.
14.3.2 Visual imperfections. commonly referred to as scabs, seams, laps, tears, or slivers, found by exploration in accordance with 14.1 to be deeper than 5 % of the nominal wall thickness.
14.4 At the purchaser’s discretion, pipe shall be subject to rejection if surface imperfections acceptable under 14.2 are not scattered, but appear over a large area in excess of what is considered a workmanlike finish. Disposition of such pipe shall be a matter of agreement between the manufacturer and the purchaser.
14.5 When imperfections or defects are removed by grinding, a smooth curved surface shall he maintained, and the wall thickness shall not be decreased below that permitted by this specification. The outside diameter at the point of grinding may he reduced by the amount so removed.
14.5.1 Wall thickness measurements shall he made with a mechanical caliper or with a properly calibrated nondestructive testing device of appropriate accuracy. In case of dispute, the measurement determined by use of the mechanical caliper shall govern.
14.6 Weld repair shall be permitted only subject to the approval of the purchaser and in accordance with Specification
A530/A530M.
14.7 The finished pipe shall be reasonably straight.
15. Number of Tests and Retests
15.1 One of either of the tests specified in 9.1 shall he made on one length of pipe from each lot (Note 2).
15.2 For pipe NPS 2 and under, the bend test specified in 9.2 shall be made on one pipe from each lot (Note 2). The bend tests specified in 9.2.2 shall he made on one end of each pipe.
15.3 The flattening test specified in Section 10 shall he made on one length of pipe from each lot (Note 2).
15.4 Retests shall be in accordance with Specification A530/A530M and as provided in 15.5 and 15.6.
15.5 If a specimen breaks in an inside or outside surface flaw, a retest shall be allowed.
15.6 Should a crop end of a finished pipe fail in the flattening test, one retest may be made from the broken end.
16. Test Specimens and Methods of Testing
16.1 Specimens cut either longitudinally or transversely shall bc acceptable for the tension test.
16.2 Test specimens for the bend test specified in 9.2 and for the flattening tests specified in Section 10 shall consist of sections cut from a pipe. Specimens for flattening tests shall be
smooth on the ends and free from burrs, except when made on crop ends.