Advantages of silver solder over tin/antimony?
pjb999
16 years ago
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pjb999
16 years agolast modified: 9 years agoRelated Discussions
Made anything with PVC pipe?
Comments (72)I drove through a small town last week where they had these really cool lamp posts down each side of their main street. They had hanging baskets of flowers on each side. The flowers sort of filled in and looked like a solid band of color around the post. So I want to make something similar. A post, painted, with baskets and maybe a solar light , (those tacky ones you see lining a drive way ). Small and round that would sit right in the top of the pipe. Does this sound do-able? How is the best way to anchor the post ? Concrete ? I ran this by my husband and got those rolling eyeballs we all love to see. But I really think I can do this by myself. Any suggestions or ideas would be appreciated....See Morewhat the heck did i buy? mini goblets/tray pic heavy
Comments (3)For tasting dragon's blood! Seriously....sort of. I think it's a "cordial set"...and looks to me like it's been sprayed silver....try a little nail polish remover and see if it removes the silver "paint"....and may be pewter....there are lots of sorts of pewter....some contain lots of lead, some none at all, some lots of tin, some antimony....so it could be something like that. It's...."interesting".... LOL!...See MoreStick Welding and Thin Metal Questions
Comments (46)I didn't mean to express the opinion that oxy-fuel welding is obsolete, just passing on the message we got in class. And I think the message was that oxy welding is simply not used much any more in industrial production welding. It's just not efficient enough to compete with electric methods. For home stuff or non-production work of course it's still in use and probably will be for a very long time. I was somewhat disappointed oxy-fuel welding wasn't taught in the summer welding class I took, but then we covered over six welding methods in six weeks so the schedule was packed. These methods included: stick, flux, mig, TIG, oxy-cutting, plasma cutting, carbon-arc cutting. I spent one week each (12 hrs/week) on stick, flux, and MIG, and three weeks on TIG. I was told that if I had already known how to gas weld, that TIG would come easier. So that was a real challenge. I was able to produce a passable bead on steel but aluminum and stainless kind of eluded me. Although I think that with more practice and better settings I could have nailed those as well. For my home use, I think an AC/DC stick unit, as well as a MIG/Flux unit, would be best. I've got a small MAPP/OXY setup, which was good for some nickel brazing, and cutting....See MorePin hole leaks in copper pipes
Comments (30)lazypup's in the ballpark but I think his long discourse on cavitation is more tailored to an extreme version you'd see in a hot water system. Cavitation occurs at a microscopic level. It happens at points in the pump volute and on the impeller where low pressure occurs (the trailing edge of the impeller is the best example). If the suction head required by the pump to operate is greater than what's available due to suction line throttling or friction losses, the low pressure becomes low enough to cause water to vaporize. It's technically "steam" but not like you think b/c it can happen even at room temperature. This can be exacerbated by pumping a hot fluid b/c it has a higher vapor pressure (i.e. it 'boils' easier). Your pump can be sitting there pumping water pretty much normally and still be cavitating. Lazypup's description makes it sound like you suddenly get a pump full of steam, but that's not the case. The bubbles that are formed by cavitation immediately collapse back on themselves and that's what causes the pump's parts to erode, since the bubbles occur at surfaces in the pump. It sounds like you're pumping marbles. Lazypup's description sounds more like a pump that's air binding. For hot water, it can be an extreme version of cavitation. But what he describes sounds more to me like a situation where the pump is depending on the pumped fluid for some of its lubrication/cooling. If the fluid isn't there, then the pump can quickly overheat....See Morebrickeyee
16 years agolast modified: 9 years agolazypup
16 years agolast modified: 9 years agofranktank232
16 years agolast modified: 9 years agolazypup
16 years agolast modified: 9 years agolouwatters
14 years agolast modified: 9 years ago
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