Search Climate Insights Directory

The document outlines a Partner Reported Opportunity (PRO) to reduce methane venting at compressor stations by moving fire gate valves closer to the facility. This relocation reduces the length of the pipeline isolated from the facility, thereby decreasing the volume of gas released through Emergency Shutdown (ESD) systems. One partner reported reducing methane emissions by nearly 7.1 million cubic feet within one year across three facilities. The economic analysis suggests that for a 24-inch pipeline with a 2,000-foot isolation length at 900 psia operated four times annually, methane savings can reach 1,700 thousand cubic feet per year, with investment costs potentially ranging from under $1,000 to over $10,000 and payback periods between 0 and 10+ years.

The document outlines a method to eliminate methane emissions during the testing of pressure relief valves (PRVs) by substituting natural gas with high-pressure nitrogen. A partner report indicates that applying this method to 120 PRVs can reduce methane emissions by 10,000 cubic feet per year, while another case involving 100 valves saved 8,000 cubic feet per year. The primary motivation for using nitrogen is safety, particularly where sour gas is present, with the methane reduction serving as a co-benefit. The practice requires nitrogen cylinders with pressure exceeding the PRV set point and involves minimal additional costs since labor remains constant regardless of the gas used.