Thank you GD2 & XL83NL.
One doubt (GD2). Not sure what you mean with:
"If it's a 'Off the Shelve' B16.5 flange, you don't have to do the bolt analysis but if the vessel tie-in flange is a custom one, a further analysis will be required to pass the bolting even if it is ASME bolting."
In both...
Dear All,
Help please.
Trying to use DIN 933 ASTM A193 B7 grade bolts for ASME B16.5 #300 WN-RF A105 flanges, under the scope of ASME B31.3 (joining pieces of pipes and valves) and ASME VIII div 1 (connecting flanges, valves etc. to vessels designed under ASME VIII div 1), for an installation...
Dear All,
When looking at the safety valve of a pressurised deaerator (with low MAWP - i.e. 10-15psi) feeding a boiler, often face the following doubt:
Must a fatal failure of check valve between deaerator and boiler be considered (thus possibility of boiler condensate backflowing into...
Hi MortenA,
In a steam system, heat loss is just a fraction of Energy Input in the boiler. Typically, boiler energy input has as its biggest fraction the actual process energy consumption.
So saving 3% in heat loss does not mean overall energy savings of 3%.
BR,
Rto
Hi There,
It is not an easy question, and it involves many potential risks.
Reducing pressure of a boiler, for small differences in pressure, ceteris paribus, leads to little savings.
Reducing boiler pressure will result in lower temperature of the flue exhaust gas (burning fuel), hence...
Hi All,
If the process is using steam, they most likely have a high pressure condensate recovery, with hot condensate being either re-fed directly into the boiler or heat exchanged before arrival to the hot well.
How about using that hot condensate in a closed loop with the HP condensate...
Dear Taki,
Specific heat and enthalpy are the same thing, an Calorific energy balance. Please refer to definition of specific heat (at constant pressure) = variation of Enthalpy with respect to temperature when pressure is held constant. Being Enthalpy a state function, the actual path...
Dear All,
I wonder if there is any experience on usage of A6061-T6 accessories (for the case under evaluation, a quick coupling) for use in a condensate/steam stream at 16barg 205ºC.
I have never encountered before this material in steam and condensate pipings.
Any experience?
Thanks,
RSpain
Hi,
Difficult to be confident not knowing the P&I of this ejectors and the specifications that have been considered by manufacturer - but doesn't sound as sufficient convincing kind of statement... I would ask to the ejector manufacturer "What exactly do you need to be supplied to the ejector's...
Hi All,
You might very well need no orifice at all, it really all depends on what you have upstream (before condensate stream) and downstream (outlets of flash vessel).
It is important to understand well what happens upstream (the initial point of your problem was a stream of condensate. With...
Thank you very much LittleInch,
Diaphragm seal + glycol/similar sounds certainly sensible, I will go further that path. Thanks.
As for piping, we do have some good evidence of appropriate pipe material, type of control valves, etc. We also have some good evidence (and access to) type of pumps...
Dear All,
I have quite a background (both theoretical and practical) on piping systems for water and/or water steam, but little background on piping systems for 20% (corn/potato/wheat) cooked starch - water solutions.
I was wondering if there is any literature with a practical approach to how...
isolated and insulated is not exactly the same thing...
My suggestion: you buy for less than 15$ a thermometre in Amazon (i.e. ThermoPro TP-50) that measures temperature and stores min and max temp. Place inside box + trial and error. Worst case scenario it will take you a couple weeks to get...
Please note I have said:
end-result
time infinite
Faster is a time-dependant concept.
Do not confuse the end-result with the time-dependant path to the end result.
Time-dependant path to the end result is a complete different story, since it has to do not with thermodynamics but rather with...
Think it this way:
If the box is isolated, the end result (infinite time) will arrive when the content reaches thermodynamical equilibrium.
From a heat transfer point of view, that means equal temperature.
since isolated, end result can only depend on starting condition.
Any two starting...
