ERW pipe 1)Material: Q195-Q235,SS400,ASTM A53/A106,BS1387 2)Type: round,square,rectangular,radiator,oval pipe 3)wt:0.3-25 ... .4mm ERW PipeMaterialQ195-Q235 SPCC and othersSpecificationsRound pipeΦ7mm -- Φ100mmSquare pipe10*10 ... /Bright/GalvanizedOD tolerance±0.03Thickness tolerance±0.02Linearity1.5/1000 ERW pipe