Re: Boiler tubes--stainless note
Posted by:
coburn benson (IP Logged)
Date: February 17, 2002 06:35PM
<HTML>A few points to consider::::who recalls Petersons humor,,,[re corrosion],,,I have been advised to spray water on my wood pile so it wont burn so fast!!! There were 2 Petersons the fellow at the 1955 lakeville meet is gone now,,,,XXXX If youre going to test at hi pressure,,do you know what tension is on the wire?? Not app'e to the heavy shell of course BBut i can only assume our audience will try to utalize what we present here,,,XXXXthe early Stanley SHELLS were .040 copper ,,wound ,,, LOWER [psi]pressure of course,,,[WOW} The idea was that the shell AND tubes expand at same rate,,,AVOIDING the stress from unequal expansion of different metals,,,,, Now consider this,,Rough road,, the string on the water bottle guage falls off at nite ,,lo water ,, pressure goes down ,,boiler overheats ,,the srink ring clamping the shell to the tube sheets ,,EXPANDS,,,,the rings revolve ,which the wire is fastend to !!allowing the wire to come loose,,The boiler holds water like a motheaten ball of yarn ,,This is the story of Donald Jones' father,,of Rowley Mass,,XXXX I think copper is ok but there IS a certain advantage to using a material that has a similar expansion rate,,,I am not sure if the tubes near the side are more or less affected by this ,,,The center of the boiler should be more flexable,,,Does anyone want to calculate the hight of the boiler w/ hi---lo water?? The strain on each tube is not too much [ASSUMING the tubes havent been annealed in the prevous 5 min] BUT WATCH OUT for the strain in the SHELL ,, My regards to Rev Inkvist [USA joke] Cheers Ben</HTML>