Cast Steel pipe ERW for structure Material : Q235(ST37.2) Size : 1/2"-12" Thickness : 1. ... .0mm Length : 5.8m,6m,11.5m,12m Cast Steel pipe ERW for structure1,30years focus on QA2,decades experience of Canton ... .5m,12m or according to the customer`s request Cast Steel pipe ERW for structure or black iron pipe welded