BS 1387 Square Steel PipeBS 1387 Square Steel Pipe: Outer diameter:21.3-219mm Wall thickness:0.4-13mm Length:3-12m Standard: BS, JIS, GB, DIN, ASTMStandard: ASTM A106-2006Grade: 10#-45#, A53-A369Grade: 20#, A53(A,B), A106(B,C)Thickness: 1 - 48 inchSection Shape: RoundOuter Diameter: 21 - 610 mmPlace of Origin: Hebei China (Mainland)Secondary Or Not: Non-secondaryApplication: Structure ...