Table of Contents
1Scope
2References
3Termsanddefinitions
4Protectiontypes
5Constructionalrequirementsforpressurizedenclosures
6Temperaturelimits
7Safetyprovisionsandsafetydevices(exceptforstatic
pressurization)
8Safetyprovisionsandsafetydevicesforstatic
pressurization
9Supplyofprotectivegas
10Pressurizedapparatuswithaninternalsourceofrelease
11Releaseconditions
12Designrequirementsforthecontainmentsystem
13Protectivegasandpressurizingtechniques
14Ignition-capableapparatus
15Internalhotsurfaces
16Typeverificationandtests
17Routinetests
18Marking
19Instructions
AnnexA(normative)-Purginganddilutiontests
AnnexB(informative)-Examplesoffunctionalsequence
diagram
AnnexC(informative)-Examplesofthechangesinpressure
inductsandenclosures
AnnexD(informative)-Informationtobeprovidedtothe
user
AnnexE(normative)-Classificationofthetypeofrelease
withinenclosures
AnnexF(informative)-Examplesfortheuseofthedilution
areaconcept
AnnexG(normative)-Infallibilitytestforcontainment
system
AnnexH(informative)-Introductionofanalternativerisk
assessmentmethodencompassing"equipmentprotection
levels"forExequipment
AnnexI(informative)-USconversionfactors
AnnexJ(informative)-UnitedStatesmajordifferences Abstract
Specifies the specific requirements for the construction and testing of electrical apparatus with pressurized enclosures, of type of protection "p", intended for use in hazardous (classified) locations defined as Class I, Zone 1 or Zone 2 by the National Electrical Code, ANSI/NFPA 70. It specifies requirements for pressurized enclosures containing a limited release of a flammable substance.
