I've made this point before, but we will need to use the existing natural gas system if hydrogen and other green gases are to become a part of the clean energy future. Therefore, we need to continue to invest to modernize our natural gas infrastructure.https://www.axios.com/hydrogen-support-growing-5ee4cfbb-ee83-4494-8561-c172467b7e5e.html …
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In New York City, National Grid (KEDNY) plans to take 20 years just to replace the existing Leak Prone Pipe -- given current pressure. Tripling the pressure would increase the number of pipes to replace... And, we can't use much hydrogen until ALL regulators have been changed.
Also, you can't replace the regulators before you start injecting large amounts of hydrogen into the gas pipes since doing so would allow methane to flow too quickly into homes and businesses. That would present a safety problem. So, incremental approaches aren't going to work.
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Your have to do it in sections. As you say your network is in big need of upgrades anyway. Good idea to make that system 100% H2 ready as it's being upgraded.
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PHMSA estimates that there were 2,257,739 miles of gas utility distribution pipes in 2019 and 319,751 miles of transmission/gathering pipelines. How much would cost to "upgrade" 2.5 million miles of pipe -- some of which is 140 years old?https://www.phmsa.dot.gov/data-and-statistics/pipeline/annual-report-mileage-gas-distribution-systems …
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