MMA Assessment OICEW-8E2D

Prepare to replace flange gasket.

• isolate and lock out system
• select appropriate gasket material
• clean flange surfaces
• check flange surface for flatness and imperfections

Fabricate a new flange gasket

• measure flange
• use packing cutter to cut gasket material
• use hole punch to make bolt holes

Reassemble flange with new gasket

• center the gasket on the flange
• use a torque wrench, well-lubricated fasteners, and hardened flat washers to ensure even force distribution
• tighten bolts in one-third increments, according to proper bolting patterns to compress the gasket uniformly
• make a final check pass at the target torque value moving consecutively from bolt to bolt

Check flange for leakage

• open isolation valve slowly
• check for leaks