NEC Classification vs. Mil-SPec

[oldfieldguy]

Our measurement group (natural gas pipeline) is looking at purchasing a videoscope (borescope) for use in inspecting the internals of various parts of their equipment.

Their candidate is shown to be "MIL-STD-810G, METHOD 511.6, Procedure I (operation in an explosive atmosphere test)".

I'm the area (five states) electrical guy and I'm accustomed to evaluating equipment in terms of area classification in terms of NEC. My general feeling is that the equipment meeting military standard will also be suitable for our situation where metering equipment may retain varying amounts of natural gas when opened for inspection.

Has anybody got any insight into this issue? My corporate safety and engineering departments haven't been much help.

old field guy

 

[ScottyUK]

Well here's the applicable standard

https://www.uvsr.org/Documentatie U...AV/MIL STD/MIL STD 810/MIL-STD-810G_CHG-1.pdf

and here's one manufacturer's opinion of testing v's certification

https://www.intercompaviation.com/uploads/documents/Aero Testing and Certification.pdf

By chance it isn't one of these boroscopes? They seem to have been tested to the MIL standard and certified by UL.

https://www.fiberscope.net/explosion-proof-borescope-xt.html

Disclaimer - I work under the European ATEX directives, so I have an interest in the North American standards but I'm not an expert on them.