Hello Experts,
Could someone guide on CORROSION ALLOWANCE requirements on Heat Exchanger Tubes of different materials (including Carbon Steel) per requirements of VGB-S-110-R-00 (Heat exchangers and boilers in the steam-water cycle of thermal power plants). So, essentially for heat exchangers...
IdanPV,
Thank you again for your prompt response!
I now understand the Code requirements based on your suggestions.
However, for Question 1, I did see FEAway's response. But (as written earlier)- my query arises because I understand that if the piping group has considered the nozzle-shell...
IdanPV,
Thank you for your guidance on the code related clarifications!
- Could you please suggest - under which Design Load Parameter (Table 5.2), shall we consider Occasional piping loads and Upset (Start-up/Shutdown) piping loads ?
- Also, from Table 5.3, is there no classification...
FEA way,
Thank you for your prompt response. My query arises because I understand that if the piping group has considered the nozzle-shell flexibilities in their analysis then we do NOT need to impose any other flexibility condition at Nozzle End when applying piping loads.
What would be your...
Hello Experts,
I have external nozzle loads provided by piping group and this needs validation by FEA (elastic analysis for now) for mechanical integrity (beyond WRC).
The piping guys have considered the actual Shell-Nozzle stiffness for arriving at the imposed loads.
My first question is -
1...
@ georgeverghese:
Thank you for you reply!! That explanation was very helpful.
For Congigurations of GPSA vs EPRI (with the actual flow provided) :
Per EPRI : ID = 20"
Per GPSA (K=0.2) : ID = 32"
Any observations or comments on those values ?
@ georgeverghese:
Thank you for your valuable reply!
Since for my present application, the total flow rate is quite low (3000 lb/h) and that too is distributed among different incoming lines - would it be Ok if we use radial nozzles (with impingement plate)instead of tangential ones as shown...
@ katmar:
Thank you for your valuable insights. You are correct about the higher max velocity as recommended by EPRI.
However, per your comment about the max velocity being for sizing pipes - could you please refer to the snap I have attached here and look for the text I have highlighted in...
Hello Experts,
I from a mechanical background but seeking some advice on basic Sizing of a Vertical Flash Tank/Vessel WITHOUT Mesh Pad. The flow of incoming condensate is just 3000 lbs/hr (so low!). The vent and drain both go to a Surface Condenser of a power plant.
I searched on this forum...
TGS4,
Thank you for the confirmation on that point! Very Helpful.
However, I will again ask my question above on why is this criteria of local failure not required to be achieved for Test Condition -
That basically means that Local Failure under Hydrotest conditions cannot happen even if the...
IdanPV,
Thank you for your reply. Please note the following for your replies:
1). My bad! Indeed, I was referring the Old Code Edition (2017). I had both the Editions open and I quoted the older one while I posted my query!. Thanks for pointing that out.
2). What I meant was - I was trying to...
DriveMeNuts,
Thank you for clarifying on the Ratcheting assessment for Hydro-test.
Let us see if some other experts could share their views if assessment for PROTECTION AGAINST LOCAL FAILURE for Hydro-test condition is required ?
Hello Experts,
Do we need to assess PROTECTION AGAINST LOCAL FAILURE for Hydro-test condition as well ? I have checked for PROTECTION AGAINST PLASTIC COLLAPSE by Limit Load Method with applicable load factors.
As i read through 5.3.2 Elastic Analysis — Triaxial Stress Limit, it guides on the...
TGS4 thank you for your explanation and elaborating beyond what i intended to ask! It is really helpful for my further investigations.
However, I should have mentioned in the question that my present analysis does NOT have cyclic loadings and therefore the Protection Against Failure from Cyclic...
DriveMeNuts,
Thank you for that explanation! That helps a lot.
When you say - The stresses at the cyl-head junction will therefore have a stress limit of 3xS - I understand you meant only for the Bending Stress has a limit of 3S, right ?
So, in actual practice, one should evaluate stresses at...
Hello Experts,
Table 5.6 in ASME Sec VIII Div 2 gives examples for Stress Classification. I am trying to understand when on a FLAT HEAD junction to shell would one consider the bending stress as Primary Bending or Secondary.
Of course I read through the Note (2) If the bending moment at the...
Thank you for you reply. I am sorry but i cannot share any pictures here :(
However, let me try to explain the construction:
I am analyzing a high pressure steam sparger system for stresses. So, this long sparger pipe (assumed as a PV) has small orifices located longitudinally. The orifices...
