ISA 12.04.04:2012
ISA 12.04.04:2012 Pressurized Enclosures Pertains to equipment made suitable for use in hazardous (classified) locations by pressurizing the use of a pressurizing system.
Table of Contents
1Scope2Purpose
3References
4Definitions
5Generalrequirements
6Enclosurerequirements
7Non-metallicenclosures,non-metallicpartsof
enclosuresprotrudethroughtheenclosure
8Protectinghotsurfacesandignition-capablecomponents
9Protectingagainstenclosurerupture
10PURGINGrequirements
11Tests
12Marking
13Enclosureaccessformaintenance
AnnexA(informative)-Commentsonthetext
AnnexB(informative)-Informationforsizingpipesand
ducts