Hot Expanded Large Diameter Carbon Steel Seamless Pipe 1. OD: 8"-42" (219mm-1220mm), WT: 6mm-60mm 2. Standard: ASTM, API, DIN Shandong Baodelong Steel Pipe Manufacturing Co, .Ltd produced below steel pipe professionally:1) Large Diameter Carbon Seamless Steel PipesOD: 8"-42" (219mm-1220mm), WT: 6mm-60mm2) Spiral Welded Steel Pipe (SSAW)OD: 8"-42" (219mm-1220mm), WT: 6mm-20mm3) ERW Steel Pipe OD: ...