I need to move the fill pipes on two saddle tanks. Task involves cutting new holes with holesaw, welding in new fill pipes, cutting off and welding a cap on old fill locations. When i was a kid we used to fill them with soapy water. For several reasons, (aside from being old & wise), this wont work. Tanks have not had any fuel in them in many years and are bone dry, but still have faint odor of gasoline.
I am competent to do the job, just don't want to blow myself up in the process. Is there a safe way to do this?
Thanks