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How Much Oxygen Is Allowed In The Purge Gas For Flare

Started by omnibus, Sep 22 2016 10:33 AM

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#1 omnibus

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Posted 22 September 2016 - 10:33 AM

How much oxygen percentage is allowed in the purge gas ( in our case usually methane or ethylene) for flare header purging. Could not get answer to this anywhere. The datasheet specifies 0.5% in one netwrok and 1% in another. API 521 only specifies 6% oxygen 25 ft below flare tip but no information on purity of purge gas.

#2 shvet

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Posted 22 September 2016 - 10:43 PM

Allowable oxygen content in flare/purge gas is a calculated value, It is usually defined by LOC (limiting oxygen concentration). See NFPA 69 for more information and CEN/TR 15281 for oxygen monitoring technologies.

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