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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Machining characteristics of plastic pipe
"Ecnerwal" wrote in message
... In article , Jim Wilkins wrote: Try grey plastic electrical conduit instead. Machining-wise, essentially the same. The only real advantage of the electrical stuff is sunlight resistance - I use 1/2" for driveway for anybody thinking to sue the stuff in a sunlight application for its intended purpose, that is very misleading. It will sun rot and break like white water pipe, just not as fast. The schedule 40 is absolutely not rated for sunlight, and while the schedule 80 is, I can say it will also sun rot, and the only reason it doesn't break up in most applications is the extra wall thickness. Not taking away from your application, just wanted to throw that in there before somebody electrocuted themselves down the road. As to your driveway markers... Why not put in some pressure treated 4x4s with some reflectors screwed to them? |
#2
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Machining characteristics of plastic pipe
In article ,
"Bob La Londe" wrote: "Ecnerwal" wrote in message ... In article , Jim Wilkins wrote: Try grey plastic electrical conduit instead. Machining-wise, essentially the same. The only real advantage of the electrical stuff is sunlight resistance - I use 1/2" for driveway for anybody thinking to sue the stuff in a sunlight application for its intended purpose, that is very misleading. It will sun rot and break like white water pipe, just not as fast. The schedule 40 is absolutely not rated for sunlight, and while the schedule 80 is, I can say it will also sun rot, and the only reason it doesn't break up in most applications is the extra wall thickness. Not taking away from your application, just wanted to throw that in there before somebody electrocuted themselves down the road. Both Carlon (major conduit manufacturer in the USA) and the NFPA (the folks that write the NEC) disagree with you. Sunlight resistant is printed right on there, on schedule 40. It's rated for the prupose, its designed to be used for the purpose. As to your driveway markers... Why not put in some pressure treated 4x4s with some reflectors screwed to them? Massive overkill, massive waste of money, and foolish to put something that will cause damage if you slide into it alongside the driveway. 25 cents worth of PVC and a couple more cents worth of Scotchlite tape do the job just fine, and don't damage anything if they are hit with a car. -- Cats, coffee, chocolate...vices to live by |
#3
Posted to rec.crafts.metalworking
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Machining characteristics of plastic pipe
"Ecnerwal" wrote in message
... In article , "Bob La Londe" wrote: "Ecnerwal" wrote in message ... In article , Jim Wilkins wrote: Try grey plastic electrical conduit instead. Machining-wise, essentially the same. The only real advantage of the electrical stuff is sunlight resistance - I use 1/2" for driveway for anybody thinking to sue the stuff in a sunlight application for its intended purpose, that is very misleading. It will sun rot and break like white water pipe, just not as fast. The schedule 40 is absolutely not rated for sunlight, and while the schedule 80 is, I can say it will also sun rot, and the only reason it doesn't break up in most applications is the extra wall thickness. Not taking away from your application, just wanted to throw that in there before somebody electrocuted themselves down the road. Both Carlon (major conduit manufacturer in the USA) and the NFPA (the folks that write the NEC) disagree with you. Sunlight resistant is printed right on there, on schedule 40. It's rated for the prupose, its designed to be used for the purpose. And yet I can show you hundreds of locations where the stuff is turning color and getting brittle within a few miles of my house. Both sch40 and 80. As to your driveway markers... Why not put in some pressure treated 4x4s with some reflectors screwed to them? Massive overkill, massive waste of money, and foolish to put something that will cause damage if you slide into it alongside the driveway. 25 cents worth of PVC and a couple more cents worth of Scotchlite tape do the job just fine, and don't damage anything if they are hit with a car. -- Cats, coffee, chocolate...vices to live by |
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