To:
Subject: Hydrostatic test pressures.

Question:

Can you provide the standard hydrostatic test pressures for flanges conforming to API 6A with respect to the various working pressure ratings?

Answer:

API Spec 6A does not require a hydrostatic test for loose connectors, such as blind flanges and studded adapters, but API Spec 16A does require a hydrostatic test for studded adapters and clamps.

For an explanation of API Spec 6A and 16A test pressure requirements, and a table of working pressures and test pressures, Click Here.

For an explanation of the unique requirements for testing API Spec 16A clamps, Click Here.

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