... 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 A106/A53,ST37,35, API ... XS, XXS etc.6) Technique:Hot Rolled,Cold Drawn,Seamless,ERW,LSAW,SSAW,7) Surface treatment:bare,black painting,anti ... power,shipbuilding,boiler,construction,,metallurgy,etc thick wall seamless steel pipe