The results of a recent PSV study at one of our plants indicate that we will need to install some new PSVs on piping and Section VIII vessels. We plan to do the installations online which will require hot taps. API 520 and ASME Sec. VIII are fairly clear that the inlet piping to the PSV SHALL...
My company deals with gas transmission. We have several compressor stations in which the PSVs and blowdowns vent to the atmosphere. Many of them have older style CS flapper valves at the top of the vent to prevent water and debris accumulation. The industry and API discourage the use of these...
