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IX dimension names
Here follows the names and weights of the rings. The IX-rings only have one dimension per DN (Nominal Diameter) that covers all the pressure classes.
Read morePressure test gasket
Pressure test gasket VPTG-Compact
Vestpak has developed a special pressure test gasket for compact flanges. For more info, click here.....
IX-rings for compact flanges
Compact flanges keep replacing conventional flanges.
The IX-rings are designed and used where the NORSOK CFC (Compact Flange Connections) are in use. The rings come in three different kinds of steel and are coated with PTFE in varying colours in order to distinguish between them. Standard identification NORSOK STANDARD L-005 (NCF5).
All markings should be on the inside of the ring.
| Flange material | Service temperature | Ring material | Colour |
| Carbon steel | -50 C to +250 C | Carbon steel CS360LT or low alloy steels, e.g. AISI 4140 | Blue |
| Stainless steel | -50 C to +250 C | 22Cr Duplex | Yellow |
| Stainless steel | -50 C to +250 C | 17/4-PH | Orange |
| Stainless steel | -101 C to +250 C | Nickel alloys such as Alloy 625 or similar | Black |
