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.
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.
