Statistical Performance Evaluation Of Soft Seat Pressure Relief Valves

Conference · Tue Mar 26 04:00:00 EDT 2013

OSTI ID:1070060

Harris, Stephen P.; Gross, Robert E.

Risk-based inspection methods enable estimation of the probability of failure on demand for spring-operated pressure relief valves at the United States Department of Energy's Savannah River Site in Aiken, South Carolina. This paper presents a statistical performance evaluation of soft seat spring operated pressure relief valves. These pressure relief valves are typically smaller and of lower cost than hard seat (metal to metal) pressure relief valves and can provide substantial cost savings in fluid service applications (air, gas, liquid, and steam) providing that probability of failure on demand (the probability that the pressure relief valve fails to perform its intended safety function during a potentially dangerous over pressurization) is at least as good as that for hard seat valves. The research in this paper shows that the proportion of soft seat spring operated pressure relief valves failing is the same or less than that of hard seat valves, and that for failed valves, soft seat valves typically have failure ratios of proof test pressure to set pressure less than that of hard seat valves.

• Research Organization: Savannah River Site (SRS), Aiken, SC (United States)
• Sponsoring Organization: USDOE (United States)
• DOE Contract Number: AC09-08SR22470
• OSTI ID: 1070060
• Report Number(s): SRNL-STI--2013-00178
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING