Canadian Association of Petroleum Producers (CAPP), June 2009. — 22 p.This document addresses design, maintenance and operating considerations for the mitigation of internal corrosion in sweet gas gathering systems. For the purpose of this document, sweet gas service is considered to be where the CO2 to H2S ratio is greater than 500:1 (this limit is supplied as a guideline only and may not be absolute). Typically, these would be systems where the H2S concentration is in the low ppm level. This document does not address the deterioration of aluminum and non-metallic materials.
This document is intended for use by corrosion specialists involved with the development and execution of corrosion mitigation programs, engineering teams involved in the design of gathering systems, and operations personnel involved with the implementation of corrosion mitigation programs and operation of wells and pipelines in a safe and efficient manner. It contains a consolidation of key industry experience and knowledge used to reduce sweet gas pipeline corrosion; however, it is not intended to be a comprehensive overview of all practices.Contents
Failure Statistics
Corrosion Mechanisms and Mitigation
Pitting Corrosion
apour Phase Corrosion
Recommended Practices
Corrosion Mitigation Techniques
Corrosion Monitoring Techniques
Corrosion Inspection Techniques
Leak Detection Techniques
Repair and Rehabilitation Techniques
