https://www.alleima.com/en/products/tube-pipe/tubular-products/subsea-tubes/
Subsea tubes in duplex and super-duplex steel — Alleima
Subsea tubes in austenitic stainless steel, duplex and super-duplex stainless steels for applications like flowline pipe, riser tubes, manifold and christmas...
subsea tubesduplexsupersteelalleima