Hazardous zones Instrumentation
Hazardous zones Instrumentation
(OP)
For selecting Instruments for a dusty atmosphere ( coke drum area),the hazardous area classification says it is zone 22 where as the vendor supplying the instruments to suit Zone 2. Vendor claims that Zone 2 ( fit for gases) is sufficient enough for this. Thanks to clarify,the statement by the vendor.Also would like to know the difference between these two plesae





RE: Hazardous zones Instrumentation
Zone 22 is defined in NFPA 70 Article 506 (of which I don't have a copy). You might check there or try searching or posting on this forum:
http://www.eng-tips.com/threadminder.cfm?pid=184
John D
RE: Hazardous zones Instrumentation
----------------------------------
If we learn from our mistakes I'm getting a great education!