Tapered Pipe Thread Fittings are recommended for applications with
static operating conditions; that is, installations that do not have impulse
loading from high frequency pressure variation or situations with vibration. Use
of a sealant/lubricant is highly recommended. Pipe Fittings are not recommended
when disassembly and re-assembly is necessary.
Straight Thread O-Ring Fittings are recommended for dynamic operating
conditions described above. Because they are installed tight against the mating
member and seal with an o-ring, Straight Thread Fittings are resilient to these
more demanding applications. Straight threads should be lubricated to minimize
the chance of galling.
NPSM Pipe Swivel Fittings are used with hose assemblies to eliminate the
need to rotate the entire hose when it is connected. The Pipe Swivel Fitting is
first installed in the mating component, and then the hose fitting is connected
to the swivel nut. The swivel nut rotates so the hose does not.
Metric Adapter Fittings are used to connect fractional or metric tubing
to BSPP or BSPT threads and fittings to adapt NPT pipe threads to
BSPP.