Gasket Installation

Gasket Installation Procedures

Storage

gasket installation: storage
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).

Handling

gasket installation: protect gasket
Protect the gasket
  • All types of gaskets (metallic gaskets, PTFE gaskets, fibre reinforced gaskets, etc.) should be handled with the same care and attention.
  • Avoid carrying small gaskets in a pocket to protect the gasket from damage.
  • Carry ready cut gaskets carefully, ideally in some form of protective cover.
gasket installation: protect surface
Protect the surface
  • Do not bend the gasket and do not damage the surface.

Gasket Installation

The Tools
  • 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.
gasket installation: cleaning surface
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.
gasket installation: flange conditions
Flange conditions
  • Make sure that the flanges are parallel and report all irregularities.
gasket installation: important gasket
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.
gasket installation: tightening
Bolt tightening
  • 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.
gasket installation: re-tightening
Re-tightening
  • 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.
gasket installation: re-use
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.
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