I am doing a preliminary analysis on increasing the capacity of a troughed belt conveyor. I have an older copy of of the CEMA standard (5th edition). In that edition there is no discussion on how much extra volumetric capacity one should design for to account for slippage or whatever. In the...
The question really isn't whether it is my decision. The question really is under what basis can I make this decision?
That is why we normally turn to code.
In B31.3 in appendix M it steps through a flow chart to determine the fluid service for the piping application. It has one soft requirement that I am looking for help in defining.
When you get near the end of the chart towards the category D fluid service side, the final question is if the...
My concern was that the valves don't have an official WSP rating. I didn't know if this was a requirement. Or if this could be overcome with temp vs pressure rating.
I have an existing system that needs evaluation for compliance to B31.3 (as referenced by our local boiler code). The system is a deaerator for boiler feed water. One thing I have noted is that all of the ball valves on the unit do not have WSP ratings. Four have a CWP rating (1500 psi) and...
I have a couple related questions regarding typical pipe flow in an open system.
1. In a pipe line, how can you predict if the pipe will be full or not? The flow calculations would seem to change radically based on the assumption that the pipe is filled vs. not filled.
2. Assume there is a...
Just to fit the pieces together, would the outlet gage alone be showing pump pressure+fluid height+atmospheric pressure working above the tank? Or is the Patm cancelled out? (for the shut off scenario).
Thanks for the help. A related question. This pump has a flooded inlet via a raised tank open to atmosphere and I want to find out if the shut off pressure matches the pump curve supplied. We run the pump with the outlet valve closed. Since there is no flow through the pump there are no inlet...
I am having a brain cramp today. Haven't worked with pumps much for a few years.
If I want to use a pump curve to estimate the flow in an existing pump system, and I can measure the pressures at the pump, do I use the difference in pressure (Pout-Pin) to correlate to the pump curve, or do I...
I am wondering if anyone has either a good reference (by good I mean more practical than theoretical) regarding calculating flow rates in new additions to existing pipe networks. Would also appreciate a couple of key thoughts or general attack steps in how something like this could be analyzed...
I notice in many specs that people put the pound sign as in "3000#" fittings beside the spec. Again is this just classification as opposed to reading anything into the lb symbol (like as in psi)?
Does anybody have a good definition for "Direct Stress"? I have been asked as part of an upcoming job interview to prepare a short 10 minute lecture aimed at first year students regarding the principles of direct stress. Direct stress to me is simply tensile or compressive stress created by...
pylko
I will drill and weld the tube anyway. Even though the shear connection is not needed, it is probably the easiest from a mfg point of view and the best way to ensure that there is contact right from the start.
So after all that, I am going to do what I was gong to do from the start, but...
I think the way Prex has put it has finally managed to sink in to my own mind. That is
"as slong as they start bending at the same time (i.e. shimmed properly) they will add together and Itotal=Ibig+Ismall. This is no different than if they were tied to each other side by side."...
