hot-rolled steel pipe 1>Surface Treatment: Galvanized 2>Grade: 10#, 20#, 45#, 15CrMo 3>Outer Diameter: 15 - 273 mm Material J55 K55 ... L80 P110.etcStandard ASTM JISUsage conveying oil gas ,oil pipe line,pipe material collar,oil nature gas,Packing wooden cases or wooden pallet ...