This standard contains the specific requirements for pressurized enclosures, type of protection”p”, intended for use in hazardous (classified) locations defined as Class I, Zone 1 or Zone 2 bythe National Electrical Code (NEC®), ANSI/NFPA 70.
The requirements contained in this standard are supplementary to those in ANSI/ISA-12.00.01 (IEC60079-0 Mod).
This standard specifies requirements for pressurized enclosures containing a limited release of aflammable substance.
This standard does not contain the requirements for pressurized enclosures where thecontainment system may release:
a) air with an oxygen content greater than normal, or
b) oxygen in combination with inert gas in a proportion greater than 21%.
This standard does not contain requirements for pressurized rooms or analyser houses.
Due to the safety factors incorporated in the type of protection, the uncertainty of measurementinherent in good quality, regularly calibrated measurement equipment is considered to have nosignificant detrimental effect and need not be taken into account when making the measurementsnecessary to verify compliance of the apparatus with the requirements of this standard.
When the user acts in the role of the manufacturer, it is the user’s responsibility to ensure thatall relevant parts of this standard are applied to the manufacturing and testing of the apparatus.
- Edition:
- 03
- Published:
- 01/01/2003
- Number of Pages:
- 70
- File Size:
- 1 file , 340 KB
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