LSAW (Longitudinal Submerge-arc Welded) steel pipe DSAW (Double Submerged arc welded) steel pipe Forming technical method: UO(UOE),RB(RBE),JCO(JCOE) Size: Outer Diameter: 219mm-1820mm Wall Thickness: 5.0mm-50mm Length: 6mtr-12mtr Quality Standard: API 5L, API 5CT, ASTM 53, EN10217, DIN 2458. IS 3589, GB/T3091, GB/T9711 Steel Grade: Steel Grade:API 5L: GR B, X42, X46, X56, X60, X65, X70 ASTM A53: ...