Steel grade: Api 5l : gr b, x42, x46, x56, x60, x65, x70 Astm a53: gr a, gr b, gr c En: s275, s275jr, s355jrh, s355j2h Gb: q195, q215, q235, q345, l175, l210, l245, l320, l360- l555 Surface: Fusion bond epoxy coating, coal tar epoxy, 3pe, vanish coating, bitumen coating, black oil coating as per customer¡¡¥s requirement. Test: Chemical component analysis, mechanical properties (ultimate tensile strength, yield strength, elongation), technical properties (flattening test, bending test, blow test, impact test), exterior size inspection, hydrostatic test, x-ray test. Mill test certificate:en 10204/3.1b