API says that the pressure drop in the inlet piping to PSVs shall not exceed 3% of the set pressure. Common sense also gives that there should be no pockets in the inlet piping (as liquid accumulation would promote corrosion, possible water hammer effect and possible blockage if solids are...
Does anybody know if there are rules to where the manual valves should be placed around a PSV? "Inside" the reducers or "outside"? What I mean is that there would be a (significant) difference in manual valve size whether we place them close to the PSV's, upstream and downstream, where the pipe...
A short question:
I'm considering design pressure of various vessels in an oil&gas utility system. The vessel in question is protected by a pair of PSV's which relieves to flare. The flare system has a design pressure of 10 bar. Should the vessel's design pressure be set to the same pressure...
A minimum flow from a high pressure pump back to a low pressure vessel is controlled with a minimum flow valve. This pressure loss over the valve is 90 bar. Upstream the valve we have #1500 piping class and downstream it will be #150. We have a spec break over the valve.
Now, we need double...
I'm working on project where LNG shall be gasified. To achieve this, we use a shell&tube heat exchanger to heat the pressurized LNG from -155 degC to 10 degC, where the natural gas is in gaseous state. The LNG is on the tube side of the exchanger.
On the shell side we use a water/glycol mix as...
