Leak rates are only defined in API 14 B that defines 15 scf / min or 400 cc / min for subsurface safety valves based on a leak that will generate 1.5 meter flame that can be extinguished with a portable fire extinguisher by a person wearing proper PPE .
API 6 A has no leak rate defined they use bubble tight and allow a variance in test pressure of 5 % to a maximum of 500 psi allowing for thermal effects.
API 598 for valve inspection and testing of 0.18 cubic inch or 3 cubic centimeters per minute per inch diameter of a valve, this for inline testing of valves.
To my knowledge there are no other oil industry standards then these.
Email: paul.p.hopmans@shell.com
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I am a petroleum engineer. Looking for a field engineer work .
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