Instrumentation Pipe Fittings — 316 Stainless Steel

About Instrumentation Pipe Nipples and Couplings

Nipples and couplings are the straight connectors of threaded pipework. A nipple is male at both ends and joins two female ports or fittings; a coupling is female at both ends and joins two male threads. Between them they make up most of the short links in instrument hook-ups, gauge stems and valve-to-manifold connections.

Several nipple styles are listed. The hex nipple has a central hex for spanner grip, making it easy to install between two fixed fittings. The hex long nipple adds length for clearance around insulation or valve handles. The hex reducing nipple has different thread sizes on each end, so it can step down in one part. Close nipples give the shortest possible male-to-male joint, while long pipe nipples provide extended reach without a hex. On the female side, hex couplings join two male threads of the same size, and reducing hex couplings join two different sizes.

All items are SS316, with sizes from 1/16" to 2" in NPT, BSPT, BSPP, metric and SAE threads. Typical uses include oil and gas, process piping and offshore installations.

• Check overall length as well as thread size when spacing components.
• Use a reducing nipple or coupling to avoid stacking a bushing.
• Filter by fitting type, thread and length, then request a quote from the UK team.