Wondering what formula(s) are more suitable to calculate additional pressure required to drive increased gas flow rate in both incompressible and compressible cases.
Thanks!
What are the some best free online process piping and instrumentation (P&ID) drawing tools out there? Never tried any so wondering if there is simplified drag and drop kind of tools. Thanks.
We have a tank filled with nitrogen gas at 140 PSI. The tank undergoes depressurization time to time round the clock from 140 to atmospheric through a vent line. This vent line is 24/7 ice-covered. To explain the icing, I conclude that from 140 to atmospheric, the temperature plunges below...
I read somewhere an aircraft weighs more at banking due to the centrifugal force. I was trying to do a free body diagram but couldn’t see how centrifugal force adding additional weight. Any thought pls? Thanks.
From this Link I get,
1. Pumps in series: Head is added, not the flow rate
2. Pumps in parallel: Flow rate is added, not the head
However, for parallel case, not sure what I'm missing but find it not so intuitive to visualise why heads are not added. How the energy is dissipated in this case...
We have two inlet sources for two pumps system (one being the spare pump) isolated by two ball valves. Both pumps performs perfectly separately when the respective isolated valve is 100% closed. However if the isolation valve is not closed 100%, both pumps exhibit vibration. What's the...
Is it necessary at all to perform the shaft alignment if only I remove the spool either from the suction or the discharge or both?
I need to disconnect the pumps from the piping by removing the discharge spools and jacking up the suction line without actually touching/moving the volute or...
1. How do the pump manufacturers determine the pump speed or RPM?
2. A motor with a constant speed rotates the impeller at the same speed. Hence higher the motor speed, the larger the impeller RPM.
3. Higher the motor hp, larger the motor speed. So one way to increase the pump RPM is to upgrade...
Does anybody know the derivation of (B31.3, paragraph 304.5.3) the minimum required thickness for the following blank equation: t = d * ((3*P /16*SEW) + c)^0.5, which can be further simplified to (assuming E = 1, W = 1, and no corrosion allowance) t = d(3P/16S)^0.5. So far I managed to get t =...
Steam at 30 PSIG is axially entering into an atmospheric gas-liquid separator. Because of the axial entrance, steam is in cyclonic motion inside the separator. While some of it condenses into water and leaves the separator from the bottom outlet, most of it leaves the separator from the top...
"How big a tank?
Problem: An absorption machine condenses 12,000 lb. of steam/hr. Assuming the flash tank is vented to the atmosphere, determine the size of the flash tank required with a steam pressure of 12 PSIG.
Solution: Enter table 1 (attached) at 12 PSIG steam pressure, moving horizontally...
Say, we have two tanks, Tank A and Tank B. A pump is drawing stock from Tank A to Tank B at a flowrate of 2 liter/sec through a 0.05 m pipe. The discharge pipe bifurcates at some Location 1. One goes back to Tank A and the other continues to Tank B. The system is designed to pump stock at 2...
I found a weld crack between two stainless steel liners (internal) in one of my tanks. Just wondering what should be the minimum radius around the crack that I need to continue LPI. Can anyone pls direct me to the relevant sections in API 653 or API RP 575?
Thanks in advance.
Ok after sufficient time waste here I am. This is my first time to calculate minimum thickness of a blind flange. I can read the Chart (attached) and find the blind thickness, but at the same time trying to work out the equation but with no success. Here are the specs,
Mild Carbon Steel A105...
To calculate the Pump hp I have the following two equations,
Pump hp = (GPM x PSI)/(1714 x Efficiency) (1)
Brake hp (Shaft Power) = (GPM x Head, ft x SG)/(3960 gal/min/ft x Pump % Eff) (2)
With GPM = 22.44, and Head, ft = 38.4, and 60% Pump eff
Equation 1 yields, 1.94 hp
Equation 2 yields...
