Corrosion is a dominant contributing factor to failures and leaks in pipelines. To deal with this issue, the CAPP Pipeline Technical Committee has developed industry recommended practices to improve and maintain the mechanical integrity of upstream pipelines. They are intended to assist upstream oil and gas producers in recognizing the conditions that contribute to pipeline corrosion incidents, and identify effective measures that can be taken to reduce the likelihood of corrosion incidents. This document addresses design, maintenance and operating considerations for the mitigation of internal corrosion in sour gas pipeline systems constructed with carbon steel materials. Within this document, sour gas corrosion could be expected to occur when: · H2S concentration in the gas phase is greater than 500 ppm (These limits are supplied as a guideline only and may not be absolute) · H2S is dissolved in free water This document does not address failures due to environmental cracking such as sulphide stress cracking (SSC) and hydrogen induced cracking (HIC). This document also does not address gas gathering systems fabricated with aluminum and non-metallic materials.
References
iii) Corrosion and Corrosion Control
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