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  1. Skaffer

    Hazardous Area Classification for Outdoor Flanges/Valves

    Hi, Just a quick question, going through API 505, and oil and gas handbook for hazardous area classification, I find it odd and overkill that they require 3m around outdoor flanges and valves regardless of pressure, some of these are just 2 or 4 inch well below 100 psig, while indoor can be...

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