1、Venting Atmospheric andLow-pressure Storage TanksAPI STANDARD 2000SEVENTH EDITION,MARCH 2014ener光1AMERICAN PETROLEUM INSTITUTENo roproduction or notworking permitled without liconso from IHSNot for RosaleSpecial NotesAPI publications necessarily address problems of a general nature.With respect to p
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10、ces,1220 L Street,NW,Washington,DC 20005.Copyright 2014 American Petroleum InstituteNo roproduction or notworking permitled without liconso from IHSNot for RosaleContentsPage1Sc0pe12Terms,Definitions,and Abbreviated Terms.13Nonrefrigerated Aboveground Tanks.33.1General.33.2Causes ofOverpressure or V
11、acuum.43.3Determination of Venting Requirements.3.4Means of Venting03.5Considerations for Tanks with Potentially Flammable Atmospheres.213.6Relief-device Specification.223.7Installation of Venting Devices and Open Vents.34Refrigerated Aboveground and Belowground Tanks.244.1General.244.2Causes of Ove
12、rpressure or Vacuum.254.3Relief-deviceSpecification.284.4Installation of Venting Devices.85Testing of Venting Devices.25.1Ceneral.2g5.2Flow-test Apparatus.295.3Method for Determining Capacities.335.4Production Testing46Manufacturers Documentation and Marking of Venting Devices.356.1Documentation.56.
13、2Marking.35Annex A(informative)Alternative Calculation of Normal Venting Requirements.37Annex B(informative)Basis of Emergency Venting for Table 7 and Table 8.46Annex C(informative)Types and Operating Characteristics of Venting Devices.51Annex D(informative)Basis of Sizing Equations.59Annex E(inform
14、ative)Basis for Normal Out-breathing and Normal Inbreathing.73Annex F(informative)Guidance for inert-gas Blanketing of Tanks for Flashback Protection.75Annex G(informative)Explanation of Differences in Thermal Inbreathing Using the General Methodand Annex A Method.78Bibliography.83Figures1Test Appar
15、atus for Flow Testing of Venting Devices.302Typical Ratio Limits for Capacity Testing of Venting Devices Using the Coefficient ofDischarge Method.33B.1 Curve for Determining Requirements for Emergency Venting During Fire Exposure(SI Units).49B.2 Curve for Determining Requirements for Emergency Venting During Fire Exposure(USC Units).50C.1Open Vent.51C.2Side-by-side Pressure/Vacuum Vent.,.,.,.,.,.,54C.3 Large,Weight-loaded Emergency Vent.54No roproduction or notworking permitled without liconso from IHSNot for Rosale