... : SCH5-160, STD, XS, XXS etc.6) Technique:Hot Rolled,Cold Drawn,Seamless,ERW,LSAW,SSAW,7) Surface treatment:bare,black painting ... ' container, 6 meters to 12 meters for 40' container9) Application:petroleum,gas,chemical,power,shipbuilding,boiler,construction,,metallurgy,etc thick wall seamless steel pipe