ASTM A312:19 pdf download

ASTM A312:2019 pdf download.Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes.
11.5 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 I . I. The test is not required to he 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 be used shall be at the option of the manufacturer, unless otherwise specified in the purchase order.
12.2 The hydrostatic test shall be in accordance with Specilication A999/A999M, unless specifically exempted under the provisions of 12.3.
12.3 For pipe whose dimensions equal or exceed NPSIO, the purchaser, with the agreement of the manufacturer, is permitted to waive the hydrostatic test requirement when in lieu of such test the purchaser performs a system test. Each length of pipe furnished without the completed manufacturer’s hydrostatic test shall include with the mandatory markings the letters 6’NH.”
12.4 The nondestructive electric test shall be in accordance with Specification A999/A999M.
13. Lengths
13.1 Pipe lengths shall be in accordance with the following regular practice:
13.1.1 Unless otherwise agreed upon. all sizes from NPS ½ to and including NPS 8 are available in a length up to 24 f with the permitted range of 15 to 24 ft. Short lengths are acceptable and the number and minimum length shall be agreed upon between the manufacturer and the purchaser.
13.1.2 If definite cut lengths are desired, the lengths required shall he specified in the order. No pipe shall be under the specified length and no pipe shall be more than ¼ in. [6 mm] over the specified length.
1 3. 1 .3 No jointers are permitted unless otherwise specified.
14. Workmanship, Finish, and Appearance
14.1 The finished pipes shall be reasonably straight and shall have a workmanlike finish. Removal of imperfections by grinding is permitted, provided the wall thicknesses are not decreased to less than that permitted in the Permissible Variations in Wall Thickness section of Specification A999/
A999M.
15. Repair by Welding
15.1 For welded pipe whose diameter equals or exceeds NPS 6, and whose nominal wall thickness equals or exceeds 0.200. it is permitted to make weld repairs to the weld seam with the addition of compatible filler metal using the same procedures specified for plate defects in the section on Repair by Welding of Specification A999/A999M.