BS 1387 Square Steel PipeBS 1387 Square Steel Pipe: Outer diameter:21.3-219mm Wall thickness:0.4-13mm ... , DIN, USE:Petroleum,chemical,power,gas,metallurgy,shipbuilding,constructio,etc.SEAMLESS pipe : ISO 9001CERTIFICATE. BUTT WELDED FITTING: Production acc. to the standard ... /XS/XXSMaterial Grades: A403,WP304, WP304L, Wp316, WP316L, A234WPB,Dimensions: Seamless: from 1/2' up to 24' Welded: From 1/2 ...