For overpressure scenarios involving heat input to a multi-component fluid, with subsequent vaporization of that fluid and relief of the vapors generated, a question arises: what is the effective heat of vaporization that should be…

When performing pressure relief analysis, the blocked system outlet is one of the most common overpressure scenarios requiring consideration.  A blocked system outlet can occur on almost any piece of equipment.  A blocked outlet may…

Prescriptive requirements for overpressure protection in the United States: Steam (ASME Boiler and Pressure Vessel Code, Section I, §PG-67 through PG-73) Compressed Gas Containers (29 CFR 1910.101) Acetylene (29 CFR 1910.102) Hydrogen (29 CFR 1910.103)…

For vessels containing compressed air, the requirements for overpressure protection are found in 29 CFR 1910.169(a)(2)(ii)1, which specifically references ASME Boiler and Pressure Vessel Code (BPVC), Section VIII.2 All equipment used in providing and utilizing…

For overpressure protection systems involving only rupture disks (that is, not a rupture disk in combination with a pressure relief valve), the frictional losses throughout the piping system is typically used as a means for…

All control valves, regardless of their fail-safe position, have the potential to go wide open.  Failure open of an inlet control valve is typically considered an applicable overpressure scenario for a pressure vessel when the…

2018 Q1 Technical Awareness

Pressure changes from protected equipment to a pressure relief valve (PRV) and from a PRV to the final relief effluent location are determined to allow an evaluation of the effect of the pressures on the…

In our experience, rented, leased or purchased temporary equipment as well as vendor-supplied skids that are intended for either temporary or normal use, have been found to have numerous issues pertaining to the overpressure protection…

In a reciprocating compressor, a failure of the packing material around the rod can allow high pressure gases from the cylinder to enter into the distance piece that separates the cylinder housing from the compressor…