Pressure relief valve for

Pressure Relief Valve for Polymer Plugging Service... 

Estimate tlie etftme discliarge relief tlirough a pressure relief valve for an uninsulated tank witli a 7.5 in surface area tliat is exposed to fire. The following data is provided. 

Robert Kern, Pressure-Relief Valves for Process Plants, Chemical Engineering (Feb. 28, 1977), pp. 187-194. 

Robert Kern, Pressure-Relief Valves for Process Plants, Chemical Engineering (Feb. 28,1977), p. 187. J. C. Leung, H. K. Fauske, and H. G. Fisher, Thermal Runaway Reactions in a Low Thermal Inertia Apparatus, Thermochimica Acta (1986), 104 13-29. 

When the shell of a vessel is exposed to extreme heat on the outside and the inside is in contact with vapor, metal temperatures may reach levels where tensile strength will be reduced such that rupture may occur even though the pressure does not exceed the set point of the pressure relief valve [for ordinary carbon steel, this temperature is 900°F (482°C)]. Vapor depressuring provides fire protection for process units by reducing the contained pressure at such a rate that ... 

Graphical method of sizing pressure relief valves for vapor or gas services. 

Betts, P.L. Francis, J. Pressures beneath the disc of a compensated pressure relief valve for gas/ vapour service. Proc. IMechE Pt. E J. Process Mech. Eng. 1997, 211 (3), 285-289. 

Shell and tube exchangers seldom have pressure-relief valves for fire exposure because vapors will quickly flow to the next pressure vessel from which they can be discharged. The two-thirds rule from API RP 521 states ... 

The liquid fluorine tank has two connections, one to a vapor space line and the other to a dip line in the liquid. Both lines are double-valved. There is no rupture disk or pressure relief valve for relieving excess pressure, but a pressure gauge and high-pressure alarm are installed in the vapor line. 

Pressure relief devices authorized for use on carbon dioxide cylinders include the Type CG-1 rupture disk and the Type CG-7 pressure relief valve. For specific requirements, see CGA S-1.1, Pressure Relief Device Standards—Part 1—Cylinders for Compressed Gases. [7]... 

Authorized pressure relief devices for use on cylinders of liquefied petroleum gases are the Type CG-7 pressure relief valve. For butane cylinders, the Type CG-4 combination... 

A special pressure relief valve for the material feed line from the dosage and mixer units... 

Opening of pressurizer relief valves for PWRs and pressurizer bleed valves for PHWRs ... 

Figure 4.14 Back-pressure correction factor, K, for balanced-bellows pressure relief valves (for vapors and gases). (Courtesy American Petroleum Institute, 1220 L Street, NW, Washington, D.C.)...

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