ASTMA335P9 seamless steel pipes should comply with the requirements of TSG D7002 [Type Test Rules for Pressure Pipeline Components]
Chemical composition of ASTMA335P9 seamless steel pipes: carbon: ≤0.15, manganese: 0.30~0.60, phosphorus: ≤0.025, sulfur: ≤0.025, silicon 0.50~1.0, chromium: 8.0~10, molybdenum: 0.90~1.10
Product specifications of ASTMA335P9 seamless steel pipes: outer diameter 21.36~762mm, wall thickness: 2.0~130mm.
Production methods of ASTMA335P9 seamless steel pipes: hot rolling, cold drawing, hot expansion. Delivery status: heat treatment.

Surface condition of ASTMA335P9 seamless steel pipe: All seamless steel pipe surfaces should be clean, and free of scale, stain, grease, paint, and other external materials; because these will interfere with the interpretation of the test results. The cleaning and preparation of the surface to be inspected shall not damage the surface quality of the parent material or seamless steel pipe. Excessively rough or deep scratches on the surface will produce interference signals that are unfavorable to the test.

ASTMA335P9 seamless steel pipe certificate: In addition to the information required by the A530/A530M standard, the certificate should state whether the material has been subjected to a hydrostatic test. If the material has been tested by non-destructive electrical testing, the certificate should indicate this and show the practical procedures followed and the reference calibration defects used. In addition, the test method information should be added to the standard number and grade shown in the certificate. The certificate and mark are indicated by the test method, hydraulic test, non-destructive testing, mark, test pressure/NDE,

Product mark of ASTMA335P9 seamless steel pipe: In addition to the marks specified in the A530/A530M standard, it should also include: Length: If the seamless steel pipe meets any of the supplementary requirements of SL to S6, the symbol "S" should be added; the wall thickness grade number of the ANSI standard, and the furnace guide or the factory number of the steel pipe that can identify the furnace piano. In addition, the mark should also include the set mark to indicate the test method. The mark on the steel pipe can be sprayed, printed, or rolled. The steel pipe that has been welded by strips should be marked with "WR".