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I think black iron is tougher than galvanized steel, and i use galvanised steel on my hybrid, took repeatedly 6x and today a 7x shot. I think you can put 600 psi in yours.

CpTn_lAw wrote:I think black iron is tougher than galvanized steel, and i use galvanised steel on my hybrid, took repeatedly 6x and today a 7x shot. I think you can put 600 psi in yours.

cool, thats alot of pressure. thanks for the input. the more i get the better.

is t the same for pvc because i am going to get a fridge compressor and i want to make a marbel launcher and i was going to build a marbel launcher out of black pipe and run it a 400 psi but would sch 40 pvc work at 400 psi?

Read this:
http://www.spudfiles.com/spud_wiki/inde ... sure_rated

Sch 40 has little to do with the pressure rating. There is also a table on there which will tell you what pressure rated PVC can handle 400PSI (probably 1/2"), though personally i'd just go with metal fittings and pipe.

Ha. No.
Color does not cause the pipe to suddenly have a higher pressure rating. Painting a bit of pipe black will not make it (measurably) stronger.
It is true that the only iron fitting from McMasters that are rated over 150 are black iron, but that does not mean that all black iron pipes are rated to 1000psi. Galvanization is just a process used to keep the originally black iron pipes from rusting. Any iron pipe that doesn't specifically say what it is rated to you can expect to be rated to 150.
However the working pressure of iron fittings turns out to be many many times higher. I personally have used it in my pneumatic up to 600 (as high as the gauge on my fridge compressor.)

mcmaster definetl has galvanized rated above 150, not as much but they do have it