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Subject: Double drilled flanges

Question:

Currently I have a client asking about the usage of a standard for a Double Drilled Flange. The manufacturer wants to use API 6A.

The size of the flange is as follows: 7-1/16" 3000lb / 5000lb 6B Flange with R46 Ring Groove.

If you could help me at all, I would be most grateful.

Answer:

No need exists to double drill 7-1/16" 3M/5M flanges, these flanges join directly using combination bolts and a combination ring gasket. See Crossover Connections for a full explanation.

See Double Drilled Flanges for more information.



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