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Rifles, Reloading, Optics, Equipment
Gunsmithing
Air Compressor - Piping for Gunsmithing Equipment
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<blockquote data-quote="ntsqd" data-source="post: 2534553" data-attributes="member: 93138"><p>When PVC fails, and it does fail, you get shrapnel. It particularly doesn't like to get cold because it fails much easier then. For temporary service I might consider it, never for long term service or something "temporary" that is likely to become permanent.</p><p></p><p>If you read up on copper you realize that the solder joints are the places that are the weakest. I installed one system using silver solder and was so proud of myself for addressing that failure mode. Until I realized that to get the silver solder to flow that I'd basically annealed the tubing at the joint. It was a lot more expensive and no real gain. The second copper system that I've installed is soft soldered.</p><p></p><p>It was touched on above, but it bears repeating. regardless of copper or poly make your main lines (trunk lines) from bigger tube than your drops. Install the mains with a slight slope. Up to you where they slope to, but the idea is that the condensed moisture will run downhill. Could be a single slope to one end, could be two slopes with a high point in the middle that slopes to the ends, or two slopes that slope to the middle. The drainage drops at each low point need to have valves at the bottom of them to periodically drain the condensation.</p><p></p><p>The service drops also need to be thought out. Place the taps into the trunk line pointing up, and then U-turn the drop down to where it needs to be. This helps keep the condensation from just running down your drops and ending up in your work. Use a 'T' where you put the QD on the drop, not a 90°. Put a short section of tube in the 'T' below the QD and cap it with a valve or a petcock.</p></blockquote><p></p>
[QUOTE="ntsqd, post: 2534553, member: 93138"] When PVC fails, and it does fail, you get shrapnel. It particularly doesn't like to get cold because it fails much easier then. For temporary service I might consider it, never for long term service or something "temporary" that is likely to become permanent. If you read up on copper you realize that the solder joints are the places that are the weakest. I installed one system using silver solder and was so proud of myself for addressing that failure mode. Until I realized that to get the silver solder to flow that I'd basically annealed the tubing at the joint. It was a lot more expensive and no real gain. The second copper system that I've installed is soft soldered. It was touched on above, but it bears repeating. regardless of copper or poly make your main lines (trunk lines) from bigger tube than your drops. Install the mains with a slight slope. Up to you where they slope to, but the idea is that the condensed moisture will run downhill. Could be a single slope to one end, could be two slopes with a high point in the middle that slopes to the ends, or two slopes that slope to the middle. The drainage drops at each low point need to have valves at the bottom of them to periodically drain the condensation. The service drops also need to be thought out. Place the taps into the trunk line pointing up, and then U-turn the drop down to where it needs to be. This helps keep the condensation from just running down your drops and ending up in your work. Use a 'T' where you put the QD on the drop, not a 90°. Put a short section of tube in the 'T' below the QD and cap it with a valve or a petcock. [/QUOTE]
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Air Compressor - Piping for Gunsmithing Equipment
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