Hello Everyone,
I've been asked to check if some existing piping needs to be re-rated based on the maximum dead-head pressure exceeding the design pressure of the suction and discharge piping on a few pumps. I got a few questions before I dig into this in more detail:
1. When a centrifugal...
Hi, I have a question regarding mandatory Appendix 2 in the back of ASME VIII for bolted flange connections.
I've used this appendix when calculating the minimum bolt stress required and maximum bolt stress allowed on girth flanges for shell and tube heat exchangers. However, I was recently...
Hey Everyone,
I just entered a new piping engineer roll, and I've had to learn how to use Caesar II quite a bit lately. It's my first time using this program, so I've had to spend some extra time trying to learn this program. The problem I'm looking at is a recycle gas line on one of our...
Hi, thanks for your comments
Ya, I should have mentioned earlier; we are using a self priming centrifugal pump for this application. The system I am installing is present at other parts at our site, so I'm not designing this directly from scratch. This pump is preferred as we have many more...
Hi, thanks for the quick reply.
Maybe I worded that a bit wrong. Let me elaborate.
The elevation to the pump center line is about 8 feet.
The sump is open to atmosphere, so surface pressure is 14.7 psia, or about 32 feet.
The velocity head is around 0.5 feet.
I calculated the friction head...
Hi Everyone,
This is my first time sizing a pump in the real world and feel the need to refresh my mind on a few things.
I have been assigned the task of replacing one of our old sump pumps with a new pump. The original pump was a submersible pump that pumped the fluids out of the sump. The...
Hey Everyone,
I just finished a project involving compressors and came across a plethora of abbreviations to describe the capacity of a compressor, namely SCFM, ACFM, ICFM, and FAD to name a few. My current understanding, thus far, is:
SCFM - Standard cubic feet per minute - The capacity at...
Had a chat with the rental company and the manufacturer of the compressor. Sounds like the 1500 cfm is the free air delivery at the discharge and is rated at ambient conditions, so this definitely sounds like a standard cfm (scfm) capacity after all.
So is this what "free air delivery"...
Hey y'all. Been working on a project and something has been bugging me for quite a while. Not sure if it's the best place to put it. Sorry in advance.
We're looking to install a temporary air compressor while our instrument air system is down for several maintenance activities. The unit is...
Hi Everybody,
I have recently become a reliability expert in training at my company (old reliable, they're gonna call me). Although I have a fairly decent grasp on the majority of the basics, there's a few minor things regarding the basics that I could use some clarification with:
1. I know...
