Emergency Block Valves

Source: AIChE
  • Type:
    Conference Presentation
  • Conference Type:
    AIChE Spring Meeting and Global Congress on Process Safety
  • Presentation Date:
    April 4, 2012
  • Duration:
    30 minutes
  • Skill Level:
    Intermediate
  • PDHs:
    0.50

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An Emergency Block Valves (EBV) is used as a means of isolating flammable or toxic substances in the event of a leak or fire. The installation, and use, of EBV's in many hydrocarbon services will significantly reduce the potential of fire and explosion damages caused by loss of hydrocarbon containment situations; and a general improvement in overall plant safety for both capital assets, and operating and maintenance personnel. In Hydrocarbon, and / or toxic services; EBV's will serve to mitigate the potential of significant environmental releases.

This paper is to be presented in a tutorial format. The items to be covered include the code basis of EBV's (API RP-553, NFPA 58 specific requirements for LPG service), the types of valves to be used; the selection of manual or automatic valve actuation; guidelines for determining if EBV's are recommended based on equipment services, and hydrocarbon inventories; general installation requirements; and integration with other safety instrumented systems within the processing unit.

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