Oil Line Pipes 1.Standard:BS, GB, DIN, ASTM, API 2.Grade:20 ... St52, St42, Q.. 3.Outer Diameter:8-24mm Oil Line Pipes Spiral Seam double-side submerged arc welded steel pipe1. Standard ... ASTMA139, ASTMA252, API 5L, DIN, EN10217/10219/10224, BS, JIS Out Diameter 219mm-3048mm, orcan be manufactured by customer requirement Wall ... Oil tube 7. hot-galvanized steel pipe Ssaw Oil Line Pipes (L415, L320, L450)