... wall seamless steel pipe 1. many different sizes of the products 2..low and medium pressure boiler ,high pressure boil thick wall seamless ... , STD, XS, XXS etc.6) Technique:Hot Rolled,Cold Drawn,Seamless,ERW,LSAW,SSAW,7) Surface treatment:bare,black painting,anti ... ,gas,chemical,power,shipbuilding,boiler,construction,,metallurgy,etc thick wall seamless steel pipe