SpudFiles

i found these iron fittings but it doesn't say on the web page what they are rated to, do you guys think they would be suitale for a high pressure pneumatic or hybrid? (specificaly the 2" fittings)
http://www.airlines-pneumatics.co.uk/we ... ?SubCat=27

thanks Alasdair

Those are generally rated for 150 psi, although I have used them at up to 450, with no failures. They have been used in hybrid tests with up to 11x mixes. They are essentially the same as you find in normal hardware stores, so there isn't really much point in ordering them.

Definitely good for 350 psi at least, I used some in the past in conjunction with my pneumatics.

DYI wrote:Those are generally rated for 150 psi, although I have used them at up to 450, with no failures. They have been used in hybrid tests with up to 11x mixes. They are essentially the same as you find in normal hardware stores, so there isn't really much point in ordering them.

i live in the uk... the country with the worst hardware stores 8)

You can't get iron/steel pipe + fittings in the UK? What do they use for gas systems? Copper? That would seem a bit more expensive than steel/iron.

well i assume you can but i haven't found anywhere locally and shops like B&Q don't stock it

DYI wrote:You can't get iron/steel pipe + fittings in the UK? What do they use for gas systems? Copper?

No, they really do normally use copper. All the gas plumbing in my house is copper.

Those fittings are actually regulated under BS 143, but it's hard to find out what exactly what that can actually mean, because there are no online records of the standard.
However, there may be a record of the standard in my university library - I can't get to it until tomorrow though, so I can't tell you just yet.

While we are on the topic of these fittings, does anyone know if they can be welded to steel?
I doubt it but if they can be that would be really helpful.

As long as they're steel yes. But the weld will be poor because they are forged, iron, and really not made to be welded. If they were welded, the TIG process would be the best I think because it will be easier to do and better in my opinion.