Can anyone tell me the leak rate allowed during hydrotest for an emergency shutdown valve (16") in hydrocarbon (Methane) Gas Riser/Pipeline Service
If I have two vessels (Hp & LP Separator) separated by a an Emergency Shutdown Valve and a Flow Control Valve, do I need to size the PSV on the downsteam vessel of the two (LP Separator)to accommodate a gas blowby from BOTH vessels
what is the view on using a single block valve with a DPE (double piston effect) instead of using conventional DB&B valve arrangements. How does the double piston effect work. does it provide 3 genuine levels of safety similar to conventional DB&B valves [/b]
