1. Pipe fittings covered by ANSI B16.11 (Forged steel fittings, socket welding and threaded) and BS 3799 (Forged pipe fittings, screwed and socket welding), with some additions such as outlets, bosses, swage nipple, etc.

2. Materials:

These fittings are usually made of either material complying with one of the following standards:

ASTM A105 & A234, Carbon Steel

ASTM A182 & A403

          Ferritic Steel (F1, F5, F11, F22)

          Austenitic Steel (F304, F304L, F316, F316L & F321)

ASTM A350 & A420

          Carbon Steel (LF2)

          Low Alloy Steel (LF3)

UNION