... , S275JR, S355JRH, S355J2H 5.Standard: API 5L, API 5CT, ASTM A252, ASTM 53, EN10217, EN10219, GB/T9711.1-1997,GB/T9711.2 ... , and the steel pipes can be supplied according to GB, ASTM, API, DIN, JIS standards, the factory is located in Tianjin ... ’m looking forward ur reply!Linda YuanSKYPE: lindayuan1124Mobile: +86-15226605670 astm a252 spiral welded steel pipe manufacturer in China