... 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 ... : SCH5-160, STD, XS, XXS etc.6) Technique:Hot Rolled,Cold Drawn,Seamless,ERW,LSAW,SSAW,7) Surface treatment:bare,black painting ...