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Explosive atmospheres -- Requirements for process sealing between flammable process fluids and electrical systems
This document provides specific requirements for **process sealing** between a flammable process fluid and an electrical system where a failure could allow the migration of the process fluid directly into the premises wiring system.
NOTE: Some definitions differentiate the terms “flammable” and “combustible” liquids on the basis of their flashpoints. Combustible liquids under conditions of elevated pressure and/or temperature can lead to the formation of flammable mists and aerosols which are within the scope of this technical specification.
This document contains requirements for evaluation, construction, and testing of single process seal equipment, dual process seal equipment, and add-on secondary process seals.
The requirements of this document do not apply to conduit sealing devices, cable glands, and other wiring sealing methods addressed in the IEC 60079 series or other standards.
Requirements for basic electrical safety and explosion protection are not addressed by this document but may apply to the equipment under investigation. The effects of leakage to the environment are not addressed by this document.
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