RE:RE:RE:Using existing pipeline networksretiredengexec wrote: Hydrogen embrittlement causes stress fractures well below the tensile strength of steel pipes pipes. Hydrogen embrittlement is most "effective" in high tensile strength steel which is used in all pipelines. Strengths since the sixties have risen from 40,000 psi to 120,000 pso today. Hydrogen is the smallest molecule in nature and basically invades the molecular fabric of the steel. I know a of at two major explosions on the Nova system and several on the TCPL mainline caused by hydrogen embrittlement. In all cases there was almost no hydrogen in gas only that caused by corrosion. Some suggest that 5 percent in existing lines may be possible. I wouldn't sign off on it. As to separating the H2 and CH4, you would need huge molecular sieves, possible but very very expensive. As to transporting H2 in existing lines if it were safe the useful pressure of H2 is 10,000 psi whereas the pipes would operate at 1,200. I'llook out for what pipe material would work for hydrogen. So much of Hydrogen is purely hype without the horrible devil in the details. So Fantome natural gas pipes cant take 15 percent H2.
get justin to pay for the necessary retrofits.his tmx pipeline has ceased construction due to safety issues in b.c. so he needs a new green toy.