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Suggest you try Refprop as others have pointed to. Just purchase (make your company purchase) the download. https://www.nist.gov/srd/refprop You can use it with Excel. Lots of good YouTube videos explaining how to run it. https://www.youtube.com/watch?v=wxwp_7WIYQQ

My experience is with valves used in H2 recips up to 400 F with excursions to 450 F and pressure to 14,000 psi. Valves operate at 400 to 800 RPM so stresses are high and cyclic. Stress amplitude is high. Fatigue is an issue. Needless to say, at 1000 F, 300 series SS will anneal so they'd need...

302 and 316 cold worked SS is the go to material for springs where you've got high temperature and pressure.

Try water jet cutting.

Physics 101 always says normal force times coefficient of friction gives you the MAXIMUM amount of frictional force that can be developed. But if the shear stress on that frictional interface is greater than the shear strength of one of the two materials, then it seems we should predict failure...

Depending on what needs repair, the organization performing the repair generally has to be certified by a governing body which depends on what country it's in and what codes the tank was built to.

Hi PD. Regarding heat leak into a VJ vessel, let's talk about the heat leak first. Consider breaking it down like this: 1) Convective and radiation heat transfer from the environment to the outer jacket. 2) Thermal conductivity through the outer tank wall. 3) Thermal conductivity through the...

The most useful data I've found for cryogenic properties of materials is the Cryogenic Materials Properties Handbook by Martin Marietta (funded by USAF) and available at the link below (PDF version)...

The force on the window due to pressure is the differential pressure times the area. You can't change the pressure differential but you can change the area. Is there any need to seal on the OD (or toward the OD) of the window? Why not put the seal on the conical surface like you wanted to...

That's interesting... I know Phil Eckels. We have a patent together from January 2000. I enjoyed working with him. I haven't purchased his computerized database. Instead, I have spreadsheets to do the same thing.

Interesting info from EdStainless. Thanks for that. I've always used the Cryogenic Materials Data Handbook: http://www.dtic.mil/dtic/tr/fulltext/u2/438718.pdf See page D.11.p for 304

Lots of great advice, thank you.

btrue, thanks for the lead. I've looked for the Victaulic info, haven't located yet. Maybe tonight... ~ bimr, interesting about the blocks. The discussion so far has been to use them. No mention of "restrained fittings" - can you explain what you mean by that? ~ zdas, thanks for the info...

I stumbled across some info from Mueller and Dresser. Does anyone have any experience with them good or bad...

Thanks LittleInch. The Viking Johnson looks very much like what I was looking for.

About half the elevation is the well itself. Once out of the well, the pipe will be buried under or alongside a dirt road bed, mostly flat. Total elevation is roughly 150 feet so only about a 75 foot rise over the 3000 foot distance. No significant hills. Not sure about skilled labor yet. I...

I've volunteered to work on a small, water distribution project in the Dominican Republic which will benefit the local community. One of the first goals is to install roughly 3000 feet of 4" pipe from a well to an open tank. Maximum pressure expected is only about 70 psi. The pipe will be steel...

I'd suggest getting a high pressure nipple from one of the manufacturers of tubing and use tube fittings on either end. Check out: Butech: http://butechvalvecatalog.haskel.com/ HiP (High Pressure Equipment Company): http://www.highpressure.com/ Parker/Autoclave: http://www.autoclave.com/...

Any thoughts on what the maximum compression ratio should be for a diaphragm compressor (metal diaphragms)? Assume hydrogen gas. Alternatively, how many stages would be required to take gas from 100 psig to 6000 psig?

Only from experience. I've warmed up SS valves and pumps from -420 and below to ambient by using a garden hose on them to warm them up quickly. Never had a problem with warpage or anything like that.