Long trailing hoses across the floor are a pain and a trip hazard so I want to put in permanent pipework around the walls and across the ceiling with outlets at strategic points.
So the question arises as to what to use. There appear to be three choices:
- Black steel tube (BS1387). This appears to be the common choice and pretty cheap, but probably the most difficult to work with, needing the pipe ends threaded etc.
- Copper tube. This would be convenient and easy to work. I did some Googling and found several references to doing this in the U.S., although one article mentioned that their type M tube (0.81mm wall thickness in 3/4") was not thick enough and that type K or L should be used - 1.65mm and 1.1mm in 3/4"
Translating this, table X tube in 22mm has a thickness of 0.9mm and table Y has 1.2mm..... so the table Y would appear to be thick enough but the commonly available table X is apparently not.
One article also suggested that brazing rather than soft soldering was needed.
Can anyone shed any light on this or suggest a source of table Y tube?
- Plastic pipe. John Guest make a blue coloured nylon pipe and fittings claimed to be for compressed air, and Durapipe make something similar in a special form of ABS, although I can't find a supplier at this point. Again referring to U.S. articles, plastics seem to be deprecated by the safety organisation, OSHA. The concern appears to be not so much whether it can stand the pressure, but more about what would happen on failure (e.g. from mechanical damage) - thought to be shards of plastic exploding everywhere. Since that could spoil one's weekend I feel rather dubious, easy to fit though this is.
Has anyone implemented a compressed air distribution system or know about any of these techniques?
The compressed air will be via a regulator and in the normal 6-8 bar range.
TIA for any useful data
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