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Air Gun Home Forum Index » Airgun Smithing » Possible airtube supply    View previous topic :: View next topic  Possible airtube supply   Posted: Sat Feb 23, 2013 7:34 am ZipSnipe Veteran Member Joined: 09 Mar 2012 Posts: 327 I was in Home Depot the other day getting some new recepticles for the house when I walked by where they sell ceiling fan parts and they had the tubes for where they hang down from the ceiling. They looked to be 7/8 to 1 " in diameter. Now my first though was cool some polished rails for my cnc router I want to build. But then I was like man they could be used for shrouds or c02 tubes and I will even venture and say they might be PCPable. Very thick walls. Just thought I would throw that out there, they have them in all sorts of colors and metals. _________________ You can have tomorrow, I'll take yesterday !!!   Posted: Sat Feb 23, 2013 9:03 am AirGunEric Site Admin Joined: 20 Jan 2007 Posts: 6908 Location: "Out There" Unless you can determine exactly what metal/alloy they may be- I would suggest that use on PCP should be avoided. If someone has the ability to hydro-test what they've created, that might be an idea as well- but I can't imagine using a 'mystery metal' designed to hold fans from ceilings in an HPA environment is a very good idea without more information. _________________ ` I'd say "I care." But I'd be lying. Canadian Airgun Supplier: http://www.scopesandammo.com/storefront   Posted: Sat Feb 23, 2013 2:41 pm ZipSnipe Veteran Member Joined: 09 Mar 2012 Posts: 327 PCPable = means maybe able to use. The metals were brass,stainless and yes some mystery metal electro coated. But the wall thickness was pretty stout. I would say without having calipers on me at the time that they were at least 50% thicker than Crosman c02 tube. They are worth a look. I might use one if the diameter is right for my next c02 tube gun adventure. But yeah bottom line is use common sense. _________________ You can have tomorrow, I'll take yesterday !!!   Posted: Sat Feb 23, 2013 5:25 pm rrdstarr Member Joined: 18 Feb 2013 Posts: 26 Location: Victoria, BC I'd stay with steel or stainless steel on a PCP tube with known metallurgical properties! _________________ 3 2240's in various stages!   Posted: Sat Feb 23, 2013 6:54 pm rsterne Moderator Joined: 15 Jan 2008 Posts: 2998 Location: Coalmont, BC That tubing may be welded, or possibly just swaged to size.... I wouldn't use it, period.... You want seamless, DOM tubing for a PCP tube, and preferably in a material of known tensile strength so that you can do the math.... A classic example is iron waterpipe.... It looks plenty thick.... but at 2000 psi you would have a pipe bomb.... Bob _________________ Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! Airsonal: Too many to count!   Posted: Sat Feb 23, 2013 8:37 pm ZipSnipe Veteran Member Joined: 09 Mar 2012 Posts: 327 Well the next time I am there , I am going to measure it up. It should be fine for c02 tube. Yeah I forgot to look inside one of the other tubes , I really only picked the brass one up and was impressed that it was actual brass. The stainless steel also looked like stainless steel. The other tubes were questionable. I would have to look again. _________________ You can have tomorrow, I'll take yesterday !!!   Posted: Sat Feb 23, 2013 9:36 pm rsterne Moderator Joined: 15 Jan 2008 Posts: 2998 Location: Coalmont, BC CO2 can reach 1900 psi at 120*F, so it is potentially just as dangerous as any HPA setup with a 1.8K burst disc installed.... CO2 tanks have an 1800 psi rating and a 3K burst disc installed.... Bob _________________ Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! Airsonal: Too many to count!   Posted: Sat Feb 23, 2013 9:48 pm Robw Veteran Member Joined: 30 Jan 2013 Posts: 441 you should be alright with the stainless, but I would burst test a piece or two remotely first before putting it into service. I would pass on the brass though. _________________ Getting in a rush only slows you down. Reflect Jesus Christ-Not your surroundings. 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