Flexible pressure bearing tubing

Can anyone tell me please whether or not it is possible to obtain flexible tubing that can withstand say 4 Bar pressure......something along the lines of braided flexible tap connectors but much finer....about 1/8" to 3/16". I would like to incorporate it into an air testing rig for small locos. I usually make do with 1/8" copper but it kinks easily and lacks flexibility when the loco has to be moved for adjustments etc. I have also tried rubber tubing but this suffers from ballooning or is otherwise too thick to give much flexibility.

Hi Mick Have you tried flexible car brake pipe used on most kit cars.

Maurice.

I'm sure you could find something here:

**LINK**

The clear vinyl tube is rated to 2.7 bar and goes down to 1/8 inch. I cant find braided-reinforced nylon tube less than 1/4 on that site, but I know In have seen it in very small sizes.

Neil

Edited By Neil Wyatt on 12/05/2014 19:02:50

The plastic pnumatic tube will take 10bar plus and you can get easy to use push fit connectors, something like this unless you have a specific need for braided

Edited By JasonB on 12/05/2014 19:01:53

Hi Mick,

Try Goodrich hoses as listed here:- **LINK**

The 600-02 has a 2mm bore and a 5mm dia over the outer braid.

This does tend to be expensive, but is probably the best and I've used Goodrich on my motorcycles for years.

Nick.

Stainless steel braided Teflon hose (brake hose) is certainly an option, pressure is not a problem as it is good for +250 bar working pressure and should be OK for the temperatures just over 250 degree C. It is normally sized by dash number which is in 1/16" increments so -3 is 3/16. You should also be able to get snap connectors to make connecting things up very easy.

I find it reasonable to cut if you wrap the cut in tape and use a fine toothed saw, done it quite a few times in my motor sport days (rally cars)

Bob

Edited By Bob Brown 1 on 12/05/2014 19:22:45

wrap it tightly with insulation tape then cut through the tape - stops it flaring.

Showing your age there Bob. I use a very good quality pair of sidecutters and as Fizzy suggests, wrap it in tape where you want to cut. Like Bob, I cut (what seemed like) miles of this stuff back in the day and I must say, using Goodrich or Earl's fittings I never had a failure.

graham.

Wot's age got to do with it I did a race car for a mate back end of last year with the stuff!

It certainly does not come off very easily unless you want to remove the fitting, I've had a wheel smashed off the car and half the suspension wrecked but the caliper was still attached to the car by the hose

Brilliant gents, thanks very much for all that. Now off to do a bit of homework on what you have flagged up.

Mick