Recent content by harvey13

Thanks for the input. I think that this discussion highlights that the duct diameter should always be specified as I.D. or O.D. Arewin

I've thought about this a little more and I think that industrial pipes (mainly dust collection) are assumed to be O.D. The dimensions of standard rolled angle/flange rings are listed by diameter, and the I.D. of these rings are 1/8" or 3/16" larger than the nominal dimeter of the pipe, i.e. a...

Thanks Chris, The second half was just me running on too long, but also to make it clear that I know that ductwork can be just about any dimension. I would assume that industrial duct would be the same.

We are having a discussion about duct diameters, and so I have a short question about Ductwork. Is there a generally accepted convention that understands that listing the size of a duct, automatically identifies the ID or OD of the duct? If so, which one? Is the convention the same for HVAC...

Sorry about the "vanishing", but I was out of the office w/o internet connection. I was asking about the water distribution basins in the tower, but we can let this thread die. Thanks for your help. Harvey13

What is a recommended pressure in the distribution header of a packaged cooling tower with 6-8 cells? The flow is balanced at each cell by a manual butterfly valve. I've been told to use 30 psig, but that seems like a lot of pump HP to waste. Will there be problems if I design the header...

Gne77 I’ve been away from “my” computer for over a month, and since I’m old, I couldn’t remember by password and I wasn’t able to respond until today, so a belated thanks for the clarification. In the example from the 7JUL post I have a question. You have the “First Part” written as: (3 *...

777gne I have tried to follow your conversation with Latexman, but there are too many gaps for me in the development of this equation and the thread from last year. Latexman had a different variation of your equation that I think was due to the units of the proportionality coefficient. I...

A client has asked if there is a computer program for Industrial Ventilation. The client is primarily interested in dust collection systems. A typical system has several hoods (different types) branch ducts, elbows, tees, main duct, collector, fan, etc. Can anyone recommend a program.

Recommendations for journal bearing & pin design: mat'l, pin surface finish & hardness, design contact pressure, lubrication. The draw bar linkage mechanism has very high loads >500,000 lbs and moves very slowly so that velocity and angular travel <30deg between the pins and bushings is very...

Would like suggestions for text or workbook, etc. with sample industrial ventilation problems.

Is there a 'standard' for the design of guyed stacks published by some organization?&nbsp;&nbsp;I am familar with wind pressures (25-33 lbs/sqft - 100mph) and wind loads (pressure x projeted area).&nbsp;&nbsp;I am less familar with accepted methods of calculating critical buckling loads...