Brass fitting and 3000psi

[Smoothice]

Hey guys,

I am in the process of getting my scuba fill set up and ran into a little problem.

In order to attach a 10inch length of stainless steel hose to my scuba fill adapter I need a 1/8" female to female adapter.

I'm adding the hose so that I don't need to remove my tank from my gun to fill it.

Good old Home Depot only has this adapter in Brass.

Will brass be strong enough to withstand 3000psi?

Thanks!

[MANN]

The local hose and fitting place told me that brass would not work when I modded my fill station. They said to only use steel.

What part do you need? your fill station probally has a 1/8npt female port, and most ss hose is 1/8npt male.

[Smoothice]

The local hose and fitting place told me that brass would not work when I modded my fill station. They said to only use steel.

What part do you need? your fill station probally has a 1/8npt female port, and most ss hose is 1/8npt male.

The first fitting on my adapter is a (bigger then 1/8") male to 1/8" male. Then my female quick disconnect.

I want it to be the (bigger then 1/8") male to 1/8" male. Then my 1/8" female to 1/8" female. Then my 1/8" male to 1/8" male ss hose. Then my 1/8" female quick disconnect.

This is the piece that is currently in Brass

[Smoothice]

So am I going to blow up if I try a brass fitting with 3000psi?

Anybody else have any experience with brass and high psi?

[RangerX]

you could probably "get" away with using the brass but it would be a considerable safety hazard. Brass npt fittings in the 1/8" size are good for about 2900 PSI.

Stainless steel fittings of the same size are good for around 5500 PSI.

If it were me I usually err on the side of caution and go build things so they are safer than "spec" so they can take a little abuse, and I'd definetly go with the stainless steel fittings.

I deal with high pressure hydraulics in my line of work and you can never be to safe

Parker (http://www.parker.com/ICD/CAT/ENGLISH/4260.PDF) makes excellent fittings

[Smoothice]

you could probably "get" away with using the brass but it would be a considerable safety hazard. Brass npt fittings in the 1/8" size are good for about 2900 PSI.

Stainless steel fittings of the same size are good for around 5500 PSI.

If it were me I usually err on the side of caution and go build things so they are safer than "spec" so they can take a little abuse, and I'd definetly go with the stainless steel fittings.

I deal with high pressure hydraulics in my line of work and you can never be to safe

Parker (http://www.parker.com/ICD/CAT/ENGLISH/4260.PDF) makes excellent fittings

Parker claims that the correct fitting in brass can go up to 4000 psi.

Parker part # 2-2 Female Hex Coupling 1/8" to 1/8" has these working pressures: Brass= 4000 stainless steel= 6400 and steel= 6800

I agree though. Better safe then sorry.

Thanks.