Re: [PSUBS-MAILIST] welding sheet metal

The tanks are just cold rolled steel. The little pin holes is what I am trying to avoid.

I will not have a method of pressure testing them. They are U shaped so wide open on the

bottom. Won't know until I put it in the water

for the first time. That is not the time to have to fix em.

Do you think brazing the welds would ensue the pin holes are plugged?

I will be zinc priming and epoxy painting the insides. These will be bolted on and are just

for a little more stability on the surface and a little more freeboard.

Stainless is for you poor saltwater guys. My nice cold clean Lake Superior is really nice

on steel.

Dean

In a message dated 2/26/2009 1:03:57 P.M. Central Standard Time, ShellyDalg@aol.com writes:

Hi Dean. That's generally how it's done. Just make sure the metal's clean, has a good fit up, and expect a few pin holes. You might think of gas shielding the back side of the weld, but you still gotta pressure check it for leaks anyway.

When welding thin sheet, it tends to warp a bit, so lots of small tacks.. When welding thin sheets into tanks, it's a good idea to use a wet sponge to control the heat to just at the weld area to prevent warping. I just wipe the areas next to the weld beads as I'm going along and it reduces warpage a lot on thin stuff.

Most of your holes will be at the start/stop area. Not much to do here but drill them out after you're done and fill em back in. Are you going to coat the tanks inside, or is it stainless.?

You could use TIG but it's slower. Frank D.

A Good Credit Score is 700 or Above.. See yours in just 2 easy steps!