| Observation |
Possible Remedies |
| Gasket badly corroded |
- Select replacement material with improved corrosion resistance.
|
| Gasket extruded excessively |
- Select replacement material with better cold flow properties.
- Select replacement material with better load capacity—i.e., more dense.
|
| Gasket grossly crushed |
- Select replacement material with better load carrying capacity.
- Provide means to prevent crushing the gasket by use of a stop ring or redesign of flanges.
|
| Gasket mechanically damaged due to overhang of raised face or flange bore |
- Review gasket dimensions to insure gaskets are proper size.
- Make certain gaskets are properly centered in joint.
|
| No apparent gasket compression achieved |
- Select softer gasket material.
- Select thicker gasket material.
- Reduce gasket area to allow higher unit seating load.
|
| Gasket substantially thinner on OD than ID due to excessive flange rotation or bending |
- Alter gasket dimensions to move gasket reaction closer to bolts to minimize bending movement.
- Provide stiffness to flange by means of back-up rings.
- Select softer gasket material to lower required seating stresses.
- Reduce gasket area to lower seating stresses.
|
| Gasket unevenly compressed around circumference |
- Make certain proper sequential bolt-up procedures are followed.
|
| Gasket thickness varies periodically around circumference |
- Provide reinforcing rings for flanges to better distribute bolt load.
- Select gasket material with lower seating stress.
- Provide additional bolts if possible to obtain better load distribution.
- If flanges are warped, remachine or use softer gasket material.
|
Performance data published here has been developed from field testing,
customer field reports and/or in-house testing.
While the utmost care has been used in compiling this information, we
assume no responsibility for errors. Specifications subject to change
without notice. This edition cancels all previous issues. Subject to
change without notice.