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Old 12-22-2004, 06:40 AM
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Welding a floor above a gas tank

I have some body mount holes in my trunk that have developed cracks. I would like weld the cracks closed. I know that I will have to remove gas tank and the tar on the under side.

It sounds straight forward but do I plug the gas lines? My tank had a leak at the top 3 years ago through the vent tube. Some gas my have contacted the floor I don't know for sure. How do I know for sure a panel is safe to expose it to flame/heat?

What are the welding safety rules when welding near areas that may have been exposed the gasoline?

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Old 12-22-2004, 07:49 AM
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You must either remove the source of the gas fumes, or neutralize them so that they are not a concerne. If you remove the tank seal all lines so they they will not leak. The tar like substance under the trunk floor needs to be removed also before any welding takes place.

Vince
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Old 12-22-2004, 07:58 AM
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Welding a floor above a gas tank

Hi evltwin. If the gas leak was aprox 3 years ago and was fixed at that time, there should be no reason that the gas would give you a welding hazard. I would remove the gas tank and plug the gas lines, dry off the lines and vent the area (if inside a garage or building) If still concerned about a fire I have used wet rags and laid over the parts in question. Remember that gas vapor/fumes will ignite faster the raw gas in liquid form. BE SAFE, DON'T DO IT IF YOU DON'T FEEL SAFE.
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Old 12-22-2004, 09:21 AM
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