@r6155
As with my first reply to the user of this custom flange they should contact somebody to evaluate it correctly and not estimate anything. A flange this size with these pressures is no joke. However, I can tell you for sure that I wouldn't start shouting about RTJ gaskets without knowing...
You can also get lower stress to seal spiral wound gaskets. Lemons, Flexitallic Garlock etc all supply these.
Manway gaskets have many options... I fail to understand why the Steel-Trap (TM) [available only from Chesterton] is the only option available....I'd perhaps ask a more independent...
Do not reuse an RTJ even if somebody says you can, seriously man gaskets cost nothing buy a new one every year.
Also I am camp Kammprofile, RTJ's need to go.
FYI - You can also get kamm'ed and faced RTJ's or Flexitallics Change gasket is also great.
Also the API hasn't known what it is doing...
I wish I read your thread here before replying to your other one and told you what you knew already... I regret nothing!
The metal core here really only aids blow out from over pressures and 100 psi is frankly nothing.. so a blow out is really only going to occur with loss of load so creep...
Generally, they are frankly a bit of an oversell, a decent sheet PTFE is 99 times out of 100 more than adequate for blow out resistance. However if creep resistance and blow out resistance are your bugbear then perhaps check out expanded PTFE sheets like Gore GR, Teadits 24SH or even Durlons own...
m and y values... *Shakes head and laughs in European*
Firstly, do you know how to calculate and install a gasket correctly as per ASME PCC-1 or EN-1591, if not call a consultant because at 178bar you are basically making a bomb.
I assume this is a steel vessel of some sort and not something...
If your doing it purely via pressure drop of the system.. gases are harder to seal than liquids so your drop in pressure will be quicker with a gas vs a liquid. However there isn't any rule of thumb for how much quicker as it depends on a lot of things.
I should also add here, liquid pressure...
Also while you are looking at that, check out Flexitallics Change gasket, its sort of a best of both worlds. Basically a spiral wound gasket with extra thick windings that don't buckle as easily and impart more resilience. They are really good... but I am slightly biased because I did a large...
I wouldn't use a straight PTFE as they have poor wear resistance, a filled PTFE is what you want.
Freudenberg has what you want. https://www.fst.com/products/dynamic-seals/radial-shaft-seals/
I consider them the best in the business :)
Also a point, dry running PTFE seals require a run in...
I thought this thread might like this; I was researching something else and it cropped up.
https://www.energy.ca.gov/publications/2024/hydrogen-zero-emission-tugboat-project
IMHO Hydrogen would seem like a better idea for vessels rather than just electric... technically feasible but $40 mil...
@shvet
I am sure we'll see you and your team in an upcoming CSB (https://www.csb.gov/) video!
Absolutely fix hydrogen leaks... but don't fix burning hydrogen leaks run the hell away from them!!
Hi OP,
Sealing engineer from a gasket manufacturer here. Firstly talk with a decent gasket manufacturer who is a member of the ESA(European Sealing Association) and/or FSA(Fluid Sealing Association) , they know a lot more than just about gaskets :)
I personally rate Lamons, Flexitallic...
Firstly, why doesn't anybody use washers, they cost nothing!!
Secondly... I'd worry that the corrosion is eating the bolts now, they need to be checked.
@XL83NL
Your right the fact they mentioned a "spanner" and "striking" it worries me...if they are indeed just using a spanner and not at minimum a wrench (this might be due to translation)... perhaps the reason its leaking is they don't have enough bolt force and cannot generate it with a hand...
Hi there,
If you have been attempting to stop the leak by hot torqueing (bolting up while the thing is in service and hot). Then shut down immediately and replace the whole thing you have likely broken the bolts, flange, gasket and/or possibly valve. You should never do this, I get why you...
@SwinnyGG A home build???... no this will be done in a professional laboratory... just a simple setup with regards to testing the sealing capability and not electrical output or anything, probably pressurize with helium and use a sniffer so I don't explode the lab (again!).
The H2 electrolysis...
@swinnyGG Apologies I know these types as preformed gaskets, generally made from elastomers such as FKM, NBR, EPDM and Viton etc.. However these can also contain contaminates from processing which can damage the anodes/cathodes of the cells, albeit generally in lower concentrations than FIP...
