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  1. robertogrramos

    Theoretical question about incompressible fluid

    Hi all! I'm trying to get my head around something... on a pressure vessel with an ideal gas when there is a 'leak', or any output of the stored gas, if there is no inlet, the pressure inside the tank decreases (PV=nRT), right? But with a pressure vessel filled with water, that is...
  2. robertogrramos

    Hardness Diferrence Between Ring Gasket and Flange 316

    thread330-334986 Hello all! I have the same question as the thread referenced. The situation is, ASME B16.20 defines the maximum hardness for 316 rig-joint gasket 160BHN. But flanges ASTM A182 F316L does not have a hardness requirement. So how can I know the difference of hardness between the...
  3. robertogrramos

    Hi CARRIER HAP load calculatio

    moideen: I mean "thermal condutivity". Is it the same material? I don't know, that's why I said: I don't quite understood what you meant whit "same roof/wall". I'm going to guess that they have the same area, but have different materials. If they have the same material, makes no sense to change...
  4. robertogrramos

    Hi CARRIER HAP load calculatio

    The u-value can stay the same with the thickness changing if lambda is also changing. Is the material the same in both cases?
  5. robertogrramos

    Hi CARRIER HAP load calculatio

    This U value is the thermal transmittance, it depends on the thickness and the thermal condutivity. If the software is only showing you the U value, it is already taking the material and thickness into account. U = t/lambda t: thickness; lambda: thermal condutivity Q=U*A*deltaT...
  6. robertogrramos

    Saddle without ribs?

    Thanks guys! Frankly just the fact that you didn't found a saddle wihtout ribs something absurd was allready helpfull. I guess I'll just recommend to include ribs in the design, it's not like it'll require a lot of added material or manpower to do it. Then, I'll do the calculations considering...
  7. robertogrramos

    Saddle without ribs?

    Hello, I'm new in this site and at this kind of work. But I was asked to verify some calculations of a pressure vessel design. The design is of a horizontal water boiler with 1500 l capacity (800mm radius) and 4,0 kg/cm2 pressure. I'm researching the subject, my main sources are ASME Division...

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