Mahboobul Mannan, Dwight B. Pfenning, C. Dale Zinn Jones & Neuse Inc. Austin, Tex. Conducting risk analysis and safety-engineering studies before construction of a sour-gas pipeline system will build redundancies into the system and ensure safe operation and maintenance. A recent analysis of a sour gas pipeline built in Texas provides an example of procedures for safety engineering and risk assessment. This first of two articles presents the risk-analysis methodology and minimum safety systems required by governmental regulations, a prioritized list of credible release scenarios, and hazard-zone calculations for each release...

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