Ring type joint

Properties of the ring type joint

The ring joint excels in applications with high-pressures and temperatures. Depending on the material and profile selection, the product has a few well-known properties:

  • suitable for applications in high and / or fluctuating pressures (up to 425 bar);
  • resistant to high temperatures (up to 1000 ° C) and
  • highly chemical resistant.

Different RTJ’S

We supply the ring type joint in four standard types:

R oval Oval ring joint, designed for flanges with standard ring joint grooves.
R octogonal Octagonal ring joint, designed for flanges with standard ring joint grooves.
RX Suitable for pressures up to 700 bar. This RTJ is capable of sealing itself. The outer sealing surfaces make the first contact with the flanges. A higher system pressure causes a higher surface pressure. Type RX is interchangeable with the standard R-models.
BX Suitable for very high pressures up to 1500 bar. This ring joint is not interchangeable with other types, and is only suited for API type BX flanges and grooves.


In addition to profile types mentioned above, Ridderflex supplies several different ring type joints. Our specialists are happy to advise you. 

In addition to profile types mentioned above, Ridderflex supplies several different ring type joints. Our specialists are happy to advise you. P

Ring type joint

Choice of material 

The table below indicates the most commonly used materials for ring type joints. Is the desired material not shown in the table? We also produce RTJ’s in other materials on demand.

  • Soft iron
  • Carbon steel
  • SS (Stainless steel)
  • Nickel alloys
  • Duplex steel
  • Aluminum
  • Titanium
  • Copper
  • Monel
  • Hastelloy
  • Inconel
  • Incoloy

RTJ’s are applied with special accompanied flanges with grooves. Combining the right material and profile shape results in a highly reliable seal.

Universal products

Ridderflex supplies ring type joints according to standard sizes for flanges: DIN, ASA and ANSI sizes. 

Question? Enquiry?

We excel in the production of custom-made plastic, rubber and polyurethane products.

+31 180 46 34 71 sales@ridderflex.nl

Please note! Only Business-to-Business.