Hi,
I was reviewing a FEED package for a Crude Oil Pipeline Project and I noticed the FEED Contractor used a Slam-Shut-Valve (a self actuated valve) to act as a safety isolation valve during either of HH or LL Pressure emergency. This valve was located close to the arrival point along the pipeline.
The justification provided was that, the arrival location is remote and there is no actuation source (IA, hydraulic, electric) available to have considered a conventional ESDV.
According to my research, Slam-Shut-Valves are typically used for gas service (Fisher, GE etc).
Even though I am still researching, I haven't come across any of it that is stated for liquid service.
The quick valve closing time (usually <2 seconds) associated with SSVs, gets me worried about Hydraulic Shock (water hammer). Studies around this phenomenon (water hammer) wasn't earlier conducted and neither was its mitigation considered.
Please can anyone share more experience with this type of valve, and are my concerns about it valid?
Edited by datjohn, 21 April 2021 - 02:49 AM.