|
Title: |
Piping and Valves |
Doc. No. |
L-001 |
Annex |
C |
EDS |
NSM1 |
|
Project: NORSOK |
Company: |
Rev.Date: |
20.09.99 |
Rev: |
1 |
||
ELEMENT DATA SHEET FOR SEAL MATERIALS.
The below listed seal materials are the NORSOK requirements for seal materials. It is the purchaser/manufacturers choice to select between alternatives listed. (When NORSOK VDS calls for lip seal only, this shall be used)
Use of other materials in standard Norsok valves is not allowed unless it can be documented that the properties are compatible with the requirements specified in below table.
|
Seal type |
Material |
MDS |
Applicable pressure classes & temperature range. |
Additional information/ limitations |
|
O-ring |
Hydrogenated nitrile (HNBR) |
150-900 lb. /-46 to 150° C 1500-2500 lb./ -46 to 120° C |
Mechanical properties of the material are reduced by increasing temperature. |
|
|
O-ring |
Fluorcarbon-terpolymer (FKM- Viton B type) |
150-900 lb. /-46 to 150° C 1500-2500 lb./ -46 to 120° C |
Mechanical properties of the material are reduced by increasing temperature. |
|
|
Lip seal |
PTFE |
150-2500 lb. / -46 to 200° C |
Spring energized type Elgiloy or equivalent. |