Hi Snickster,
Thank you very much for taking time to review my calculations. Yes I am indeed not very clear on Compressible Flow especially when the flow reaches sonic velocity. I think I get full understanding of this I will use AFT Arrow for my calculations. I will read the article that you...
Hi Snickster,
Due to changes in the PSV location I updated my PSV Sizing, PSV Inlet/Outlet Line Pressure Drop calculations and took care of your comments above. Kindy find the udpated file attached. Please let me know if you still see any mistakes. The new location is show below.
Thanks and...
Hi All,
I sized a PSV downstream of a Control Valve for its wide-open failure case and got a 6"Q8" PSV. The required relief rate is 254107 lb/hr with Oxygen as the fluid. The rated capacity of the PSV is 294,851 lb/hr with 10% overpressure. I tried to size the inlet/outlet lines to this PSV...
Hi George,
It is said that Oxygen can heat up the piping due to high velocity and can cause the metal to burn. Particle impingement can cause this heating as well.
I recently received training to this effect.
Thanks and Regards,
Pavan Kumar
Hi All,
I have been tasked to size and specify End of the Line Flame Arrestors (FAs) to be installed on the vent line for Natural Gas and Oxygen pipe lines. The idea is to prevent an external flame from propagating into the Pipe line when it is purged with N2 gas. The purge gas is vented to the...
Hi Snickster,
I thank you very much for providing me a direction for the calculations. I will do these calculations and get back to you with results.
The momentum force should use the actual velocity not sonic velocity correct?. Can this be done?
Thank You.
Pavan Kumar
Hi LI,
The silencer is to provided immediately downstream of the Control valve vendor, please see snapshot below for my model. The supports are being designed based on pipe stress calculations based on my input on the reaction force.
Thanks and Regards,
Pavan Kumar
Hi Goutam,
Apologize for the delay in getting back to you. Here are my responses.
1. It is open discharge with a vent pipe is located on a standard drip pan elbow arrangement.
2. The pressure drop in the silencer plates is 7.12 bar and I have assumed 0.5 bar for the piping. So it totals to...
Hi All,
I want to calculate the reaction force at the elbow exit(F1) and vent pipe exit(F3) for a Steam Vent Control Valve that has been sized to vent excess steam pressure. It has been sized to vent the full boiler load as the worst-case. At this flow (47000 kk/hr), the pressure upstream of...
Thank you very much Obturator. I will use 10% overpressure and refer to the EN12953-6 and 8 as you mentioned above. Also 10% overpressure means 10% back pressure is allowed correct?.
Thank you very much again.
Thanks and Regards,
Pavan Kumar
