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Sour or Not Sour? That Is the Question: A Review of The NACE “Sour Limit” – Evolution and Implications for Modern Oil & Gas Production

Product Number: 51321-16626-SG
Author: Eric Caldwell/ Russell Kane/ Brian Chambers
Publication Date: 2021
$0.00
$20.00
$20.00

The use of 0.05 psi H2S partial pressure as the threshold determining when sulfide stress cracking (SSC) resistant materials are needed was codified in NACE MR 0175 (1975) nearly a half century ago and has served the industry well since implementation. The origins of this pressure are empirical and largely forgotten but there is significant history showing that it is a safe, conservative limit. As the oil and gas industry continues to innovate and mature, it is imperative to maintain knowledge of the basis of the sour limit and how it may be applied.

Key words: Corrosion science and technology, hydrogen sulfide, standardization.

The use of 0.05 psi H2S partial pressure as the threshold determining when sulfide stress cracking (SSC) resistant materials are needed was codified in NACE MR 0175 (1975) nearly a half century ago and has served the industry well since implementation. The origins of this pressure are empirical and largely forgotten but there is significant history showing that it is a safe, conservative limit. As the oil and gas industry continues to innovate and mature, it is imperative to maintain knowledge of the basis of the sour limit and how it may be applied.

Key words: Corrosion science and technology, hydrogen sulfide, standardization.

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