I taught this stuff in tech college after learning it from the safety reps of the then manufacturer Cig the local makers. Have you ever re lit the oxy welding nozzle just by holding next to a piece of hot hot plate.Īcetylene is one of the most volatile gases on the planet, mate! it will explode with an air mix ranging from (somewhere around) 92% air to 7%. Leakage of acetylene in a confined area such as a car trunk or van is a major problem if you have one tiny spark. The workplace/service van is only as safe as the person using it. A simple smell test would find any leak big enough to cause a problem. Another tech got burned by a leak at torch hose fitting catching on fire while he was brazing. I tried to check hoses and fitting each day by smell test before I lit a torch to know I was not going to have a problem.
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I have also seen fitting crack and leak, between the tank and regulator, between the regulator and hose etc. I have had hoses that were good one day and leaked the next day, and that is probably what happened to this truck. I never depended on the regulator and hose and torch valve to keep leaks from happening in the truck, I always turned the tank valve off. That's safe as long as you turn the tank valve off. I used "mc" and "B" sized cylinders for 20 years as an appliance technician and carried them in a enclosed Ford van. They left the tank valve turned on and the torch and hose leaked and filled the truck up. The lead in to the story tells it all "Two Plumber's apprentices".