Forged Steel Pipe Fittings — Socket Weld & Threaded

Forged steel fittings are pipe fittings manufactured by forging (shaping heated steel under high pressure), which produces a dense, uniform grain structure with superior strength. They are available as socket weld (welded externally) and threaded (NPT/BSPT) types for small-bore piping systems from 1/8 to 4 inches.

Forged fittings are classified by pressure class: Class 2000 (threaded only), Class 3000, Class 6000, and Class 9000. The pressure-temperature rating depends on material and class — ASTM A105 Class 3000 fittings are rated for approximately 3000 psi at ambient temperature.

Socket weld fittings have a recessed socket that the pipe inserts into, then is fillet-welded externally — providing a strong, permanent, leak-proof connection. Threaded fittings screw onto threaded pipe ends using NPT or BSPT threads — easier to assemble/disassemble but not recommended for high-temperature cycling or severe vibration.

Our forged fittings comply with ASTM A105/A105N (carbon steel for general/high-temperature service), ASTM A350 LF2 (carbon steel for low-temperature service), ASTM A182 (alloy and stainless steel), and ASME B16.11 (dimensional standard for forged fittings).

Standard sizes range from 1/8 inch to 4 inches (DN6-DN100) for socket weld and threaded types. Socket weld sizes beyond 4 inch are generally not used as butt weld fittings become more economical at larger sizes.