ASME SA312 ASTM A312 TP310S Stainless-Steel Tubes

Flattening Test

For material heat treated in a continuous furnace flattening tests shall be made on a sufficient number of pipes to constitute 5 % of the lot, but in no case less than 2 lengths of pipe.

Hydrostatic or Nondestructive Testing

Each pipe shall be subjected to the nondestructive electric test or the hydrostatic test

Markings

Markings will adhere to prescribed specifications in A999/A999M and shall include the NPS or OD 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 section 12.3 on Hydrostatic or Nondestructive Electric Test, if applicable, and whether seamless (SML), welded (WLD), or heavily cold-worked (HCW). For Grades TP304H, TP316H, TP321H & TP347H, the marking shall also include the heat number and heat-treatment lot identification.

Additional services of Zhongzheng

CTS will update the latest prices of stainless steel pipes, including seamless and welded stainless steel pipes of ASTM A312 and ASTM A213. We will update it on our website every month, hoping it can help you have a better understanding of the Chinese market. We also provide additional services to assist you in inspecting and verifying the factories and products in China. 

We sincerely hope that Zhongzheng Stainless Steel can become a good partner for your purchase of stainless steel pipes in China. 

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