shaped steel 1.OD:12.5-846mm ... 79ASTM SA335ASTM SA213JISG3467-88JISG3458-888-1240OD*1-200WTFor the petroleum,chemical,electricity,boilers industrial which can ... A358JIS 3459DIN 174586-630OD*0.5-60WTFor the petroleum,aviation,smelting,food,water,electricity,chemical, ... -1992GB3091-200132-630OD*1-30WTFor the generalstructure of the scaffold and conveying the low pressure fluidSpiral welded pipeQ235A ...