thick wall seamless steel pipe 1. many different sizes of the products 2..low and medium pressure boiler ,high pressure boil thick wall seamless steel pipe1) ... Standard:API 5L,ASTM 36.10M,A106,A53,DIN 1629,1626,BS,JIS.etc2) Material: ASTM ... Application:petroleum,gas,chemical,power,shipbuilding,boiler,construction,,metallurgy,etc thick wall seamless steel pipe