weld steel pipe 1.Size:1/2" to72" 2.Thickness:2.0 to 60mm 3.Standards:ASTM A106/53 B, API 5L GR. B. weld steel pipe 1) Standard: ASTM A106, A53, API 5L GR. B.2) Grade:B X42, X52, GR. B, ST37, ST44, ST52, S355JR3) Size: From 1/2" to 72"4) Wall Thickness: SCH20 to SCH80, XXS (2mm-60mm)5) Length: 4M to 12 M Packing1) Packing in bundles2) Surface: black painting ,varnish3) Ends: Beveled or square cut ...