CONNECTION THREADS: Medium and High Pressure

For pressures above 10.000 psi / 700 bar it is necessary to employ suitable connections for such demand.

Up to 15.000 psi / 1.000 bar specially prepared NPT conical thread connections are sufficient.

NPT is the most widely used connection thread in the oil industry. It has a taper of 1:16 (one part in 16 of the diameter), a 60º fillet and flat truncation. It is easy to seal with Teflon tape or paste sealers. It is governed by the ANSI B1.20.1 standard.

For higher pressures, employment of Cone & Thread connections is recommend.

Cone & Thread system

In this system, a male cone of small diameter presses against a female cone with a slight difference in angle. This forms a thin contact line that ensures a bubble-tight seal with a relative small force.

ABAC manufactures two types of Cone & Thread connections:

For pressures up to 22.500 psi / 1.550 bar the system is named MU, and for pressures up to 30.000 psi / 2.068 bar it is designated AU.

The figure below shows the technology and the difference between the two systems.

Pressure ranges

Connection threads

Discover our range of products for Medium and High Pressure by clicking here.