Carbon steel (SMLS/ERW) pipes 1.Surface Treatment: Galvanized,oil,painted ... ASTM/ASME/JIS/DIN Carbon steel(seamless) pipes1)SMLS/ERW carbon steel pipe 2)Steel Grade: A106 A53 ... #20# Q215 St37/42 X42/52,J55 etc1)SMLS/ERW carbon steel pipe2) Used for oil well, boilers, ... structure pipe, automobile,shock absorber,building, geology, fluid tubes, line pipe etc Seamless Steel Pipe Specification:ASTM/ASME A335 ...