ASTM SA-312/SA-312M-2013 pdf dwonload

ASTM SA-312/SA-312M-2013 pdf dwonload.SPECIFICATION FOR SEAMLESS AND WELDED AUSTENITIC STAINLESS STEEL PIPES.
11. Mechanical Tests, Grain Size Determinations, and Weld Decay Tests Required
11.1 Transveise or Longitudinal Tension Test — One tension test shall be made on a specimen for lots of not more than 1(X) pipes. Tension tests shall be made on specimens from two tubes for lots of more than 100 pipes.
NOTE 3 — The term “lot.” for mechanical tests, applies to all pipe of the same diameter and wall thickness (or schedule) which are produced from the same heat of steel and subjected to the same finishing treatment:
(I) in a continuous heat-treatment furnace, (2) in a batch-type heat- treatment furnace, equipped with recording pyrometers and automatically controlled within a 50’F [30CI range. or (3) by direct quenching after hot forming, the larger of: (a) Each 200 ft 160 mj or fraction thereof or, (h) That pipe heat treated in the same hatch furnace charge.
11.2 Flattening Test — For material heat treated in a batch-type furnace, flattening tests shall be made on 5% of the pipe from each heat-treated lot. For material heat treated by the continuous process. or by direct quenching after hot forming this test shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than two lengths of pipe.
11.2.1 For welded pipe a transverse-guided face bend test of the weld may he conducted instead of a flattening test in accordance with the method outlined in the steel tubular product supplement of Test Methods and Definitions A 370. The ductility of the weld shall he considered acceptable when there is no evidence of cracks in the weld or between the weld and the base metal after bending. Test specimens from 5% of the lot shall be taken from the pipe or test plates of the same material as the pipe, the test plates being attached to the end of the cylinder and welded as a prolongation of the pipe longitudinal seam.
11.3 Grain Size — Grain size determinations on Grades TP3O9H, TP3O9HCb, TP3IOH, TP3IOHCb, and UNS S32615 shall be made on the same number of tubes as prescribed for the flattening test.
11.4 HCW pipe shall he capable of passing the weld decay tests listed in Supplementary S9 with a weld metal to base metal loss ratio of 0.90 to 1 . 1. The test is not required to be performed unless S9 is specified in the purchase order.
12. Hydrostatic or Nondestructive Electric Test
12.1 Each pipe shall be subjected to the nondestructive electric test or the hydrostatic test. The type of test to he used shall he at the option of the manufacturer, unless otherwise specified in the purchase order.
12.2 The hydrostatic test shall be in accordance with Specification A 999/A 999M. unless specifically exempted under the provisions of 12.3.
12.3 For pipe whose dimensions equal or exceed NPS
10, the purchaser, with the agreement of the manufacturer.
15.4 Pipes that have had weld seam repairs with filler metal shall be uniquely identified and shall be so stated and identifIed on the certificate of tests. When tiller metal other than that listed in Table 5 is used, the filler metal shall he identified on the certificate of tests.
16. Certification
16.1 In addition to the information required by Specification A 999/A 999M, the certification shall state whether or not the material was hydrostatically tested. if the material was nondestructively tested, the certification shall so state and shall show which standard practice was followed and what reference discontinuities were used.
17. Marking
17.1 In addition to the marking specified in Specificalion A 999/A 999M, the marking shall include the NPS (nominal pipe size) or outside diameter and schedule number or average wall thickness, heat number, and NH when hydrotesting is not performed and ET when eddy-current testing is performed or UT when ultrasonic testing is performed. The marking shall also include the manufacturer’s private identifying mark, the marking requirement of 12.3, if applicable, and whether seamless (SML), welded (WLD), or heavily cold-worked (HCW). For Grades TP3O4H, TP3I6H, TP32IH, TP347H, TP348H, and
S308l5, the marking shall also include the heat number and heat-treatment lot identification. If specified in the purchase order, the marking for pipe larger than NPS 4 shall include the weight.
18. Government Procurement
18.1 Scale Free Pipe for Government Procurement:
18.1.1 When specified in the contract or order, the following requirements shall be considered in the inquiry, contract or order, for agencies of the U.S. Government where scale free pipe or tube is required. These requirements shall take precedence if there is a conflict between these requirements and the product specifications.
18.1.2 The requirements of Specification A 999/A 999M for pipe and Specification A 450/A 45DM.