spiral welded steel pipe 3 to 12m length 6\"API5L oil gas used pipe line 1.Product Name:spiral welded steel pipe 3 to 12m length 6\"API5L oil gas used pipe line 2.OD(mm):168.3 3.Wall Thickness(mm):7.11 4.Length:Random length:5-12m 5.Standard:API SPEC 5L GB/T9711 6.Surface:Black ...