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So this begs the question of what A234 is equivalent to in B31.8. I know that if7005 asked specifically about B31.8; however, some B31.3 data makes me wonder. I know that SMYS are NOT interchangeable between the two codes; however, B31.3 list the tensile strength for both at 60ksi, the yield...

Per B31.4 404.91, if line is operated above 20% SMYS then support must be attached to full encirclement reinforcement. Per B31.8 834.5 if hoop stress is greater than 50% then support must be welded to full encirclement reinforcement. I understand that it might be frowned upon in certain...

I have seen several different means to attach pipe supports to the pipe. Obviously any attachment method should be evaluated to ensure that the combined allowable yield stress is not exceeded. So for ASME code piping, B31.8, B31.4, B31.3, and B31.1 are there restrictions other than code stress...

katmar and BigInch, thank you for the helpful replies.

What are the origins for different Colebrook friction factor equations shown in a few texts? This one I have used in the past is 1/f^(-0.5) = -2Log(?/(3.7Re)+2.51/(f^0.5*Re)) Not sure why John McKetta and Ron Darby use these coefficients: 1/f^(-0.5) = -4Log(?/(3.7Re)+1.26/(f^0.5*Re))

Josephv, you are mistaken on several accounts. Carefully read your links and what you stated. Do you know the difference between GDP and per capita? There are many countries with higher energy usage and pollution generated per capita than the United States (yes, even GHG which I consider to...

josephv, you are mistaken.

Is it true that electrical engineers rarely shift to mechanical because they can't handle all of the associated conversions of units?

dbecker, "Handbook of Hydraulic Resistance" by I.E. Idelchik has a chapter, "Resistance To Flow With Changes Of The Stream Direction; Resistance Coefficients of Curved Segments -- Elbows, Bends, etc. The above book should cover most of the info you are asking. From your response, your main...

dbecker, are there a lot of these non standard bends in your project that significantly add to the system losses? Perhaps it does not make much difference regarding the loss coefficients if they only add up to a few percent of the system loss. How accurate do you think your calculations will...

Do the Cat's radiators use the same material of construction as the Detroit's? Are the Cat's radiators subject to more vibration than the others? If so, could stress induced corrosion be an issue?

Kapil, is there a specific question in your post?

wisepeppy, I agree that it seems that flow might increase by placing an orifice on the discharge end of the pipe where you only have two phase flow exiting the orifice and single phase (liquid) upstream of the orifice. I had thought about this scenario regarding condensate flashing creating two...

A curious name for your thread because it can have two meanings. Is someone trying to use radiant cooling???? or is it a radiant heating system with traditional forced air cooling? If it is the first, then condensation will be problematic.

I pursued a degree in Engineering when I was in my forties. I was recruited by an international corporation half way through my senior year for a job that paid well above the average. Age is not a barrier; however, I think it is important that you differentiate yourself from your competition...

Your fluid velocity is low enough that I question your concern? It looks like your fluid velocity will be less than 1/2 ft/sec for the smaller pipe size and 1/10 ft/sec for the 1" pipe. Assumed sch 80.

Guys, if you are not prepared to jump on the “Global Warming” or “Climate Change” bandwagon, perhaps it is a mental disorder according to the American Psychological Association: http://uk.news.yahoo.com/22/20090805/tsc-environment-us-climate-psychology-011ccfa.html

AK is not an abbreviation for Arkansas, it is AR.

I like Portland Bolt: http://www.portlandbolt.com/products/ I think that it comes up when you use Google. What specific information do you need that they don't have on their site?

Caution, for many users it is a waste of money to purchase the “Piping Guide CD.” It does not work on many of our company’s laptops and some of our desktops. All of the computers that do not run the CD have operating systems that are claimed to be compatible with the HexaLock system. This is...