We used gaseous hydrogen in a process at the GM plant where I worked in the 1970's. It was nearly impossible to maintain the supply system completely free of small leaks. Hydrogen will leak thru sub-microscopic imperfections to pipe/fittings/solder joints that no other gas can pass.
The H2 system was in fact so dangerous GM's fire insurance company required ALL hydrogen distribution piping/valving be located outside on the roof. Only the shortest possible vertical drop to the point of use inside was permitted. Even then the system suffered occasional leaks/fires - also several small explosions - from leaking H2 gas.
Bottom line: High cost aside, bulk hydrogen is simply TOO DANGEROUS to be entrusted to the general motoring public!
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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