Chuck, thanks for your information. I wasn't sure what the barrels were made of. I know the frames were low carbon steel. Since I was not a certified welder, but went through the training and can weld, I never used TIG, and this job I would not do myself.

In the power plant I worked, all of our welders were certified, and yes they did weld high pressure boilder tubes and most of our welds were either magna-fluxed and some were also x-rayed. They also used the dye penetrant on some welds but mainly to see if there were cracks before.

When the fellow first posted his friends dilemma, I thought that it could be welded if the conditions were right.

David