... other large structures.Standard: BS 1139, EN 39, JIS G 3444,GB15831,AS1576, ASTMSteel Grade: Q235B, Q345B, S235JR, S275JROuter Diameter: ... 38mm, 42mm, 48.3mm-48.6mm Wall Thickness: 2.0mm, 2.5mm, 2.75mm ... products in our website: www.threewaysteel.comFor more information about steel pipe, please send an email to us: sales11(at)threewaysteel ...