ANSI B16.5 F51  Socket Weld Flange

Definition of Socket Weld Flange:

Socket Weld flanges were initially developed for use on small-size high pressure piping. Their static strength is equal to Slip On flanges, but their fatigue strength 50% greater than double-welded Slip On flanges.

ANSI B16.5 F51 Yellow Paint Socket Weld Flange

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