If the vessel is full of liquid, the initial thermal expansion causes a liquid release probably at very low temperature due to the initial volumetric expansion that will pressurize the vessel quickly but the subsequent valve releases (as the contained fluid mass decreases) tend to be made of...
The worst case, in my opinion, is when the pig trap has the pig inside with liquid crude oil behind it and a fire starts on the outside before the trap can be drained or vented. If so, the first shots of the PSV would be made only of liquid crude, but as a free space creates inside the pig trap...
Hello All,
thanks for the answers. I'll reply with some other informations: the pig trap must be designed as per ASME VIII (even if it has the same design pressure of the pipeline that ends in it), it's considered as a pressure vessel and the event of fire is possible since the vessel is also...
Hello,
I've come across a quite mangy PSV sizing. I didn't find any similar argument across the forum, so I've started a new topic. I have a PSV that is mounted on a pig trap (receiver) that must be sized for Fire Scenario but that has a Set Pressure of 211.2 barg (relief at 255.6 barg according...
