Oil Line Pipes 1.Standard:BS, GB, DIN, ASTM, API 2.Grade: ... , St52, St42, Q.. 3.Outer Diameter:8-24mm Oil Line Pipes Spiral Seam double-side submerged arc welded steel pipe1. Standard: BS ... L/C at sight or 30% depositeAll our products 1. Spiral welded steel pipe 2. LSAW steel pipe 3. ERW steel ... 6. Oil tube 7. hot-galvanized steel pipe Ssaw Oil Line Pipes (L415, L320, L450)