Stub End

A short fitting with a lapped face, used with a loose backing flange so the flange can rotate for bolt alignment.

The stub end carries the gasket face in the line material while a carbon steel backing flange carries the bolt load, which saves alloy on expensive grades and lets the flange be rotated to line up bolt holes during erection. Type A, B and C differ in lap radius and which flange they suit, so the type must be stated with the size and rating.

Related terms

Flange Facing
Bevel

Where this applies

stub-ends-spools

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