Standard Defining Appropriate Overpressure Protection
Standard Defining Appropriate Overpressure Protection
(OP)
After several years in the Industrial Gas industry, I am now working in a pharmaceutical facility that makes use of many positive displacement pumps. There are several instances where a positive displacement pump does not have over-pressure protection. Since pharmaceutical facilities do not handle high pressures, most personnel do not have a lot of experience with high pressure safety systems. I have been asked if a single pressure switch would suffice to protect a system from an over-pressure scenario.
From my experience, I know that relying on a single pressure switch to protect from over-pressure scenario is poor engineering practice but I would like to refer to a standard that explicitly states this. Is there any US standard, preferably enforced by law, that states a rupture disk or relief valve is the only acceptable protection? Any type of SIL device/systems are not an option for this type of facility. Pressures are around 100-150psig.
From my experience, I know that relying on a single pressure switch to protect from over-pressure scenario is poor engineering practice but I would like to refer to a standard that explicitly states this. Is there any US standard, preferably enforced by law, that states a rupture disk or relief valve is the only acceptable protection? Any type of SIL device/systems are not an option for this type of facility. Pressures are around 100-150psig.





RE: Standard Defining Appropriate Overpressure Protection
RE: Standard Defining Appropriate Overpressure Protection
RE: Standard Defining Appropriate Overpressure Protection
Per ISO, only the term Safety Valve is used regardless of application or design.
RE: Standard Defining Appropriate Overpressure Protection
API-521 doesn't permit the use of non-HIPS instrumentation for preventing overpressure.
RE: Standard Defining Appropriate Overpressure Protection
The single switch for the overpressure protection my be acceptable if the risk is very low, i.e. low severity and low probability. Be aware of the low probability event which may be a high risk for the operation.
RE: Standard Defining Appropriate Overpressure Protection