Electric resistance welded steel pipe Usage:used for low pressure liquid delivery, such as water, gas, and oil. Oil drilling and machinery manufacturing, etc. Erw :electric resistance welded pipe Hfi:high frequency induction weld pipe Efw:electric fusion welded pipe Standard:api 5l, api 5ct, astm 53, en10217, din 2458. Is 3589, jis g3452, bs1387 Certificate:api 5l psl1/ psl2, api 5ct Out diameter:21.3mm - 610mm Wall thickness:1.8 - 22mm Length:0.3 72;c 12m 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.