The reason you might not want to use them is due to two-phased flow causing a hammering effect which can cause your line to sway if there aren't any rigid type of supports.
The type of supports would depend on the size and layout of your piping. So shoes, clamps, guides, etc. might be better used.
Much like Andrew said, at those temperatures your allowables are going be extremely low and are most likely governed by creep rupture properties.
Depending on the application such as a furnace, you might need to look into even more specific alloys, e.g. S+C.
I am not familiar with UFC85 however you may need to look through your design documents to see if there is any reason why the storage tank is stainless steel and not CS. It could be that CS is severely corroded by UFC85 and thus SS was chosen.
So while you might be able to use both SS and CS in...
You can do liquid penetrant testing if you feel so inclined to. However, you would have to weigh if doing it makes sense in the first place to begin with or what sort of defects you are trying to see.
During transient scenarios is it possible that there is steam condensate collecting in the lower tubes such that they have a level of liquid in them? If they do, then the thermal bow may occur as LI was alluding to. Or alternatively, is the pressure drop along the coil causing condensation ?
Where your peaks are most likely the gear mesh frequencies. Around the main peak, you can check to see if you have sidebands that match the running speed of either the input/output gear.
Comparing to previous measurements may help you to determine if there is increased wear.
As...
In addition to what was already mentioned, if you can get ahold of the PIP pipe specifications, you can use them as a starting point.
Another important aspect is the metallurgy of what is being used. Usually, you would have a material selection diagram to go preceed your pipe spec generation...
It will depend on your material of construction, the hydrogen partial pressure and temperature.
In most cases those overlays are to provide a barrier between the hydrogen and the steel to preven high temperature hydrogen attack. You can reference the Nelson curves in API 941.
If it is actually water seeping out, there are wraps like A+ that can be verified via ASME PCC-2 that an experienced leak sealing company can install for you.
Of course these tend to require some degree of surface preparation and as LI says, you can run the risk of making the leak worse.
In...
From the C2 Quick Reference under the What's New section
Once you have V13 and later, it appears it would use B31J. Before that it would be via App D and the B31J tool if installed.
Are you able to extract a sample of the material for testing purposes or able to perform PMI on the material ?
Otherwise, you may need to be very conservative in what you material you are assuming as it is essentially a best guess.
If the name plate is still on it, you may be able to get a...
The formula stated in the code of t = PD/2(SE+PY) is used assuming the pipe is thin such that t < D/6.
If you have a situation where t>= D/6 or P/SE >0.385 then you won't be able to use the above equation as the basis is not a thin pipe anymore.
At that point, you would be likely needing to do...
I can't rememeber the exact paragraph in B31.3, but those integrally reinforced branch welded fittings are typically expempted from the calculatons once they adhere to some additional criteria.
If you wish to change the type, then you'd need to redo the branch reinforcement calculations and...
Do you have any previous inspection history for the valves ?
Depending on the service and operational history you may find that those in clean service may not require frequency internal inspection and recertification. However, those in dirty service may.
Some valves such as those on boilers...
Hello Gears6580,
Are you referring to welding a flat plate onto the tubesheet where the tube is being extracted ? You can consider putting a tapered plug of suitable dimensions as that may be easier depending on the configuration. UG-34 would generally be the way to go once you select the...
Do you have the details on how the external engineer modelled the anchor on the condenser ?
Are the loads on the rest of the piping comparable or do you have case of lift-off occurring and thus causing more loads to be transferred towards the anchor ?
Are the allowable loads on the condenser...
One thing you can do with these types of spreadsheets, is to manually calculate one of the thickenesses. If your answers match (within reason due to rounding), then you know your formulas are correct.
When I had to do these types of repeated excel calculations with more complicated formulas...
