Gasket Installation Procedure

The gasket installation procedure is crucial to ensure a proper seal, prevent leaks, and ensure equipment longevity.  Here's a general guideline for installing a gasket:

Preparation

• Inspect Mating Surfaces  -  Clean and inspect the flanges or surfaces where the gasket will be installed.  Ensure the surfaces are free from dirt, oil, rust, or debris.
• Surface Condition  -  Check for flange surface imperfections such as scratches, dents, or corrosion.  Minor imperfections can be repaired, but significant damage may require surface re-machining or flange replacement.

Select the Right Gasket

• Gasket Type  -  Ensure the gasket material is compatible with the fluid, pressure, and temperature of the system.
• Size and Thickness  -  Verify that the gasket size and thickness match the flange or mating surface dimensions.  Over or under sized gaskets can cause leaks or failure.

Gasket Placement

• Align the Gasket  -  Place the gasket centrally between the two mating surfaces.  Misalignment can cause uneven compression and lead to leakage.
• No Adhesives or Sealants (unless specified)  -  Avoid using adhesives or sealants unless explicitly recommended by the gasket or equipment manufacturer.

Bolting Tightening Procedures

• Lubricate Bolts  -  Lubricate the threads and the contact surface of the bolt and nut with an appropriate lubricant.  Bolts should be of sufficient length to extend through the nut approximately 1/4".
• Hand Tighten  -  Hand tighten till they are snug against the flanges.
• Cross-Torque Pattern  -  Tighten the bolts in a star pattern, tightening each bolt a little at a time to ensure that the load is evenly distributed.  Tighten bolts incrementally in stages (30%, 60%, and 100% of the recommended torque).
• Torque Wrench  -  Use a calibrated torque wrench or tensioning device to achieve the correct level of bolt tension.
• Follow Manufacturer’s Torque Values  -  Always refer to the gasket or flange manufacturer’s recommended torque values.  Verify the torque or tension after a specified time has elapsed or after a specified number of cycles.

Final Checks

• Re-Torque if Required  -  After a certain period of operation (after temperature cycling), you may need to re-torque the bolts to account for gasket relaxation or settling.
• Check for Leaks  -  After installation, perform a pressure or leak test to ensure the seal is effective.

Following these steps carefully ensures a proper and long-lasting gasket seal.