It has been proposed to machine 2" weld neck flange solid forging to API 6A Type 6BX blind flange. I dont think there is an issue from metallurgy side of things however, after grinding , I think the product will no longer confirm to its original design criteria/stress calculations of API 6A.
Can anybody please provide any reference clause to standard 6A or ASME standard to support the same (restriction to grinding/ machining the flange).
Moreover, 2" weld neck flange would have a hole in the middle and blind flange is a flange with no centre bore. I dont think it is possible to machine weld neck to get a blind flange.
Your input in this regard would be much appreciated.
Best wishes
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