API 5L X70 boiler seamless steel pipe 1) Standard:API 5L,ASTM 36.10M,A106,A53,DIN ... X70 boiler seamless steel pipe1) Standard:API 5L,ASTM 36.10M,A106,A53,DIN 1629,1626,BS,JIS.etc2) Material: ASTM A106 ... ) Surface treatment:bare,black painting,anti rust oil,hot dipped galvanized,3pe,etc8) Length: 5.8 meters for 20' container, ... ,boiler,construction,,metallurgy,etc API 5L X70 boiler seamless steel pipe