Gasket Installation Procedures
Ideal storage conditions
- The gasket should be stored horizontal to avoid tensions and permanent warpage.
- Ideal storage conditions are:
- Temperature < 25°C
- Air humidity 50 – 60%
- Darkened storage room.
- Store the gasket in a clean condition (ideally in a plastic bag).
Protect the gasket
Protect the surface
- Do not bend the gasket and do not damage the surface.
- At first make sure that the following tools are available and in good condition:
- the correct gasket chosen for the specific application,
- a calibrated torque wrench,
- a wire brush,
- lubricants for the bolts.
Cleaning flange surfaces
- Make sure that the flange surfaces are clean.
- Check the bolts and the flange surface if they are technically ok and free from any serious defects.
- Always brush in the direction of the grooves.
- To avoid damage on the flange surface please use a brass drift.
- Make sure that the flanges are parallel and report all irregularities.
Important for the gasket
- Insert the gasket carefully between the flanges.
- The gasket has to be centralised in the flange.
- Ensure that the gasket is installed in a dry state.
- It is important that the gasket is not pinched or otherwise damaged when bringing the flanges together.
Lubrication of bolts
- Apply lubricant to the bolt and the nut threads as well as to the face of the nut to reduce friction when tightening.
- Pay attention that the lubricant does not contaminate the gasket or the flange surfaces.
- The recommended service temperature of the lubricant has to be within the process service temperature limits.
- The required torque value can be calculated with KLINGER®expert 5.1.
- Perform at least 4 stages to the required torque as follows:
- finger tighten bolts;
- use 30% of the required torque;
- use 60% of the required torque;
- use the full torque.
- Complete the torquing with one final pass in a clockwise sequence.
- If re-tightening is considered necessary, this should only be done at ambient temperatures before or during the first start-up.
- Never re-tighten any compressed fibre gaskets at higher operating temperatures and longer operating times.
Re-use of gaskets
- For safety reasons never re-use a gasket.
- The cost of a gasket is minimal compared with the costs which will come into being of a down time of the plant.