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gi pipe fitting q235 p235gh equivalent steel pipe sa106c thick wall steel pipe Product Name Longitudinal Welded Pipe Size OD 20~457mm(1 2inch~18inch) in theory Thickness 1.2~15.7mm Length Any Length Below 16 Meter Standard GB T3091-2008 ASTM A53 BS1387 BS EN39 ASTM A500 BS 4568 BS EN31 Material Chinese Grade Q215 Q235 According to GB T700;Q345 According to GB T1591 Foreign