I may as well add my two penneth to the story. I'd agree with the propane torch. The work needs to be on a fire brick or similar base so you are only trying to heat the work piece and not what it is standing on as well. Another danger of oxy acetylene is oxidation. If that happens around the joint then you'll probably have to start again with clean metal joints. I also agree that soft soldering is more than adequate for parts not in direct contact with the boiler. Choose a high temp. silver content solder and make sure the work is hot enough. A "cold" soldered joint soon gives up on you.
I'm not maintaining that this is the only way, but it has proved successful over the years. The last set of boilers were 2mm thick 84mm dia and 115mm long. They were no problem to get hot with a propane burner. Maybe you can reflect some heat by putting fire bricks behind the boiler while heating it.(the boilers can be seen in "Lucky Seven" in SitG #89) Bert in Austria. [EMAIL PROTECTED] _______________________________________________ SSLiveSteam mailing list Send messages: [email protected] Cancel subscription: http://postfix.45mm.com/mailman/listinfo/sslivesteam Rules: http://www.45mm.com/sslivesteam_guide.html
