ASME SA-376 SA-376M-2021 pdf download.SPECIFICATION FOR SEAMLESS AUSTENITIC STEEL PIPE FOR HIGH-TEMPERATURE CENTRAL-STATION SERVICE.
6. Materials and Manufacture 6.1 Manufacture — At the manufacturer’s option, pipe may be either hot finished or cold finished, with a suitable finishing treatment, where necessary. 6.2 Heat Treatment: 6.2.1 All pipe shall be furnished in the heat-treated condition. For H grades, separate solution treatments are required for solution annealing: in process heat treatments are not permitted as a substitute for the separate solution annealing treatments. 6.2.2 As an alternate to final heat treatment in a continuous furnace or batch-type furnace, immediately fol- lowing hot forming while the temperature of the pipes is not less than the specified minimum solution treatment temperature, pipes may be individually quenched in water or rapidly cooled by other means. 6.2.3 Grades TP304, TP304N, TP304LN, TP316, TP316N, TP316LN, TP321, TP347, TP348, 16-8-2H, S31725, and S31726 — Unless otherwise stated in the order, heat treatment shall consist ofheating to a minimum temperature of 1900°F [1040°C] and quenching in water or rapidly cooling by other means. 6.2.3.1 The purchaser may specify controlled structural or special service characteristics which shall be used as a guide for the most suitable heat treatment. If the final heat treatment is at a temperature under 1900°F [1040°C], each pipe shall be stenciled with the final heat treatment temperature in degrees Fahrenheit or Celsius after the suffix “HT.”
10. Workmanship, Finish, and Appearance 10.1 The pipe manufacturer shall explore a sufficient number of visual surface imperfections to provide reason- able assurance that they have been properly evaluated with respect to depth. Exploration of all surface imperfections is not required but may be necessary to assure compliance with 10.2. 10.2 Surface imperfections that penetrate more than 12 1 ⁄ 2 % of the nominal wall thickness or encroach on the minimum wall thickness shall be considered defects. Pipe with such defects shall be given one ofthe following dispo- sitions: 10.2.1 The defect may be removed by grinding pro- vided that the remaining wall thickness is within specified limits. 10.2.2 Repaired in accordance with the repair weld- ing provisions of 10.6. 10.2.3 The section ofpipe containing the defect may be cut off within the limits of requirements on length. 10.2.4 Rejected. 10.3 To provide a workmanlike finish and basis for evaluating conformance with 10.2, the pipe manufacturer shall remove by grinding the following: 10.3.1 Mechanical marks, abrasions (see Note 3), and pits, any ofwhich imperfections are deeper than 1 ⁄ 16 in. [1.6 mm]. NOTE 3 — Marks and abrasions are defined as cable marks, dinges, guide marks, roll marks, ball scratches, scores, die marks, and so forth.ASME SA-376 SA-376M pdf download.