Re: [time-nuts] Swagelok and metric tubing question

In message , Gary Woods writes: >On Sat, 12 Nov 2016 13:05:56 -0800, you wrote: > >>Does it leak through cracks or migrate through metal? > >I was kinda wondering about that. Isn't H the escape artist of the >periodic table? Indeed. In

Re: [time-nuts] Swagelok and metric tubing question

Helium On 11/12/2016 2:25 PM, Gary Woods wrote: On Sat, 12 Nov 2016 13:05:56 -0800, you wrote: Does it leak through cracks or migrate through metal? I was kinda wondering about that. Isn't H the escape artist of the periodic table? -- Howard L. Davidson hl...@att.net

Re: [time-nuts] Swagelok and metric tubing question

garygar...@earthlink.net said: > I was kinda wondering about that. Isn't H the escape artist of the periodic > table? I think that's helium. They way they get it commercially is to start with gas wells that have lots of it. I think some of them are 4%. Then they just push it through

Re: [time-nuts] Swagelok and metric tubing question

On Sat, 12 Nov 2016 13:05:56 -0800, you wrote: >Does it leak through cracks or migrate through metal? I was kinda wondering about that. Isn't H the escape artist of the periodic table? -- Gary Woods O- K2AHC Public keys at home.earthlink.net/~garygarlic, or get 0x1D64A93D via keyserver

Re: [time-nuts] Swagelok and metric tubing question

cdel...@juno.com said: > I just went ahead and got the short section from McMaster Carr. Want to make > sure it's right if I'm at 400+ PSI with Hydrogen for years at a time!!! How much hydrogen does a maser use? How big is the tank? Does it leak through cracks or migrate through metal? --

[time-nuts] Swagelok and metric tubing question

Well it's been an education! First finding out how to identify if the Swagelok fitting is Metric by sight and now how carefully the tubing has to be made to use compression fittings! I just went ahead and got the short section from McMaster Carr. Want to make sure it's right if I'm at 400+ PSI

Re: [time-nuts] Swagelok and metric tubing question

Compression fittings work by crushing the surface of the tubing, and the surface of the compression insert together to make a gas tight seal. Stainless is very tenacious stuff, and as a result, when it is drawn through a die when sizing it as tubing, it gets axial ridges formed by galling, and

Re: [time-nuts] Swagelok and metric tubing question

Hi The first thing that comes to mind with copper and stainless is that they are not quite the same thing electrolytically (you make a battery). That can be ok, or pretty bad depending on how wet your environment is. There may be other issues …. Bob > On Nov 11, 2016, at 8:57 PM,

[time-nuts] Swagelok and metric tubing question

Bob, That's the cheapest I have been able to find it. I'll probably go that route with the expensive version as it's specified for compression. I know the original setup mixes copper and stainless but I have read that is not recommended??? Cheers, Corby

Re: [time-nuts] Swagelok and metric tubing question

Hi https://www.mcmaster.com/#9811T14 https://www.mcmaster.com/#50365K33 First one is a 2 mm wall at $75 a chunk. Second one is 1.5 mm at $33 a chunk. It’s not obvious why one is “compression fitting” and the other is “weld” rated. In any case, I suspect you need the 2X more expensive, done

Re: [time-nuts] Swagelok and metric tubing question

Hi Corby Is there a requirement for a specific alloy? I might have some odds and ends lying around Content by Scott Typos by Siri > On Nov 11, 2016, at 12:51 PM, wrote: > > This sound off topic but it's for a Hydrogen Maser modification! > The EFOS2

[time-nuts] Swagelok and metric tubing question

This sound off topic but it's for a Hydrogen Maser modification! The EFOS2 Maser is running low on Hydrogen and this time rather than refill the compressed gas bottle I'd like to install a Hydrostik in its place. I have obtained all the fittings I need but have hit a snag! I need a few short