... Product Name Seamless Steel Tubes for Boiler, Pressure Vessel & Heat ExchangerAmerican Standard ASTM A53,ASTM A106,ASTM A333 ... ,12CrMo,12Cr1MoV,15CrMo,35CrMo,10MoWVNb, etc.German Standard DIN 1629,DIN 17175Grade St 37.0,St ... BS 3059-2,Grade 320,360,440,243Japan Standard JIS G3454,JIS G3461,JIS G3462Grade STP ... 340,STB 410,STB510,STB A12,STB A22European Standard EN 10216-1, EN 10216-2Grade P235TR1, ...