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Ah....Yes. Not sure about 660 bronze, but Phosphor bronze is acceptable.What did the plans call for on the stays?Davehi steamerthe drawings show that the stays are 3/16", all the bushes are bought from a well known steam fittings place.Bronze - SAE660 Free machining Leaded barNot subject to dezincification. Ideal for boiler bushes, bearings etc.thanks dave.
Bronze - SAE660 Free machining Leaded bar
Quote from: daveclm on October 24, 2016, 10:22:02 AMBronze - SAE660 Free machining Leaded barLeaded bronze I am not sure you want to use that for stays.Joyou have not read the first post that i did correctly, the stays are 102 ph bronze rod, no lead in. its the bushes that are 660 bronze.
Hi Dave,If the plans call for the materials, and the dimensions specified, what is the question then?Davethe drawing tells you what materials to use and sizes but not how to do the stays. like i said in my first post.
As I said earlier if using bushed stays then all the ones I have seen thread the full dia of the stay. The bush is then threaded internally to fit the stay and externally to fit tapped holes in the tubeplate. I suppose you could just solder in te bushes but I would prefer to see then full dia all the way.I'll scan a picture later of a drawing that shows then done this way.I have never had a problem silver soldering 660 and it is resistant to dezincification so no problem in a boiler though I mostly use it for fabricated cylinders.J
Quote from: Jasonb on October 24, 2016, 12:54:49 PMAs I said earlier if using bushed stays then all the ones I have seen thread the full dia of the stay. The bush is then threaded internally to fit the stay and externally to fit tapped holes in the tubeplate. I suppose you could just solder in te bushes but I would prefer to see then full dia all the way.I'll scan a picture later of a drawing that shows then done this way.I have never had a problem silver soldering 660 and it is resistant to dezincification so no problem in a boiler though I mostly use it for fabricated cylinders.JJason, understood, but my point is what is drawn on the drawing?, was the drawing signed off for construction?, and does the part conform to the drawing?I'm being pretty anal about this, because it's a boiler, and I know the laws on that side of the pond are pretty strict. Now would be a good time for Sandy or a Boiler inspector to inspect the components and make a judgment before it's all silver soldered together. It's far easier to recover from an error now before that happens. Now if you're that guy...GREAT! ....but I am approaching with a great deal of caution. I have yet to see any stamped drawing that says this is right or wrong. Dave
hi sandyi dont no the name off the boiler, it just says on the drawing horizontal centre flue boiler drawn by af campbell and sandyc argyll scotland.the boiler tube is 106 copper 1.6mm 16g bought from kennions, dia is 31/2", centre flue is 1 1/2" 106 1.6 16g tube, the end plates are 106 3.2mm 10g i known a bit over board on thickness i allready had it.the gallow tubes i think thats what they called are 20gauge the stays are 3/16 not 3/8 which i said they where. max wk pressure is 60 psi 4 bar and typical wk pressure 45 psi. the only thing i have changed is the chimmny is on the out side off the boiler. dont know if this makes any difference to the boiler.end plates are just under 86mm tight fit. dont know how tight they shoud be.thanks dave
hi sandyi thought they where you designs. i think the holes are to sloppy to just solder the stays in. would i be ok to put 1/4 stays in, turn the ends down to fit the holes i have drilled, or drill the holes to fit the 1/4 stays. will change it to fit the dome. sorry to be a pain in the backside.thanks dave.
the boiler tube is 106 copper 1.6mm 16g bought from kennions, dia is 31/2", centre flue is 1 1/2" 106 1.6 16g tube, the end plates are 106 3.2mm 10g i known a bit over board on thickness i allready had it