High Pressure Connections

Functionality & selection

The sealing of high-pressure fittings is achieved by deforming metallic contact surfaces within the elastic range.

As the only provider worldwide, we offer the possibility for all tube sizes with regard to

Thread standard (metric/inch), as well as
Cone angle

to choose in order to optimally meet your requirements.

While inch-sized connection dimensions are predominantly used in the Anglo-American region, such as in the oil and gas sector, metric fittings are primarily used in the European region. There is no price difference between the two versions.

With regard to the cone angle, the globally common standard is the connection of a 58° male cone to a 60° female cone. This principle has been used since the 1920s.

We have additionally developed a fitting with 116° to 120° cones and offer it exclusively. This achieves significantly improved sealing performance, as a higher proportion of the axially applied force of the fitting serves the sealing. Figure 1 illustrates the more optimal force distribution.

Particularly at higher pressures of approximately 4200 bar and above, we strongly recommend using the 120° fitting. For pressures above 7000 bar, we generally only offer the 120° fitting.