Tube for boilers, heat exchangers, super heaters, condensers, and catalytic tubes, refining furnaces etc. 1 General usage pipeProduct Description: Tube for general structure, gas & water transportation.Standards: ASME/ASTM: A/SA312; DIN 17456Steel Grade: TP 304/304L, 316/316L, 321/321H, 309S, 310SOutside diameter range from 6mm to 530mm.Wall thickness range from 0.5mm to 38.1mm.For sizes other ...