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The following link describes the equivalent metric and NPS pipe sizes. Is there a similar link for flanges. I have (what I believe to be) a 20 mm flange, probably the equivalent of Class 300. Will a 3/4 inch Class 300 bolt up? (I can't take it apart until an outage.) All the group 1.x...

Thanks for the reference. don Donald Blachly, PE

Are the dimensions/geometries compatable between ASME B16.5 and API Flanged fittings? I need to build a test line, probably 12 inch. I will be using B16.5 fittings. Donald Blachly, PE

Info above on the concentrations is good. Also note, sulphuric acid won't likely be used at these concentrations. Sulphuric acid is particularly hard on stainless or carbon steel during the mixing process. I recall a case where the acid mixing station for the demineralizer had to be...

StressGuy Good post. I found this entire thread interesting. I pictured the arrangement as your first sugestion, also. I am not posing as an expert in this forem but do offer this for discussion purposes: Certainly, closing up the loop with a straight through section would severely stiffen...

StressGuy wrote, "Ah, but you're not checking the stress at the elbow, you are checking it back at the anchor point. " Correct me if I am wrong. I went out the storage last night and found my copy of Roark. For a guided cantilever, there is a no (vertical) reaction at the guide, only a...

Well I could use some help on the guided cantilever method also. I have not been able to find an affordable copy Kellogg's (apparently) classic volume. A paper by Peng Engineering http://www.pipestress.com/papers/QuickFlex.pdf demonstrates the guided cantilever method of a simple...

Well, um, yes I am. Because: 1) as a mechanical engineer, I think I should be able to understand the technique well enough to analyze a simple system without the aid of FEA and I understand that per ASME B31.3 paragraph 319.4.1, "A formal flexibility analysis does not mean a computer stress...

I have read many posts from regarding piping stress analysis and recently purchased a couple of recommended books, specifically "Piping Handbook" 5th Edition edited King and "Process Piping" second edition by Charles Becht IV. I would like to aquire the Kellogg I am just learning to "crawl"...

With that much variation, there must be pretty significant geometry differences. You should check with the manufacturer. I found Cv of 107 and 130 so there is a lot of variation. But your Cv is from your manufacturer. Where did you find the relationship of Cv to K? Donald Blachly, PE

Lots of good stuff in the above posts. My older (1969) Crane TP 410 lists an in-line ball check valve as L/D = 150 and convention check valve as L/D =135 provided both are FULLY OPEN. Iha, very insightfull. For complete turbulance (rough pipes) f = 0.019 for 2 inch sch 40, therefore, K =...

John, Do either of the references (ASME MFC-3M or API MPMS 14.3) contain a treatment of low enthalpy (say X= 0.25 ) two-phase flow? Donald Blachly, PE

Huh...The preview showed the Greek letters correctly, but the actual post did not. Strange. The "v" is specific volumn and the "rho" is density. Here is the corrected display: v_tp = v_l + X ( v_g - v_l) rho_tp = { 1/[1/rho_l + X (1/rho_g – 1/ rho_l)]} * rho_l / rho_l rho_tp = rho_l...

David Thanks for your post. My analysis was: ?_tp = ?_l + X ( ?_g - ? _l) ?_tp = {1/[1/?_l + X (1/?_g – 1/ ?_l)]} * ?_l / ?_l ?_tp = ?_l / ( 1 + X (?_l/ ?_g -1)) so I feel good about it. Donald Blachly, PE

Does anyone have an errata sheet or a link for the errata for the second edition of "Flow Measurement Engineering Handbook" by Richard W. Miller? I just purchased a used second edition. Equation (9.95) looks wrong. It looks like the middle term is inverted and should be rho_l/rho_g (density...

The wellhead pressure is about 3 psi higher than just upstream of the orifice. recoveringEngineer

Does anyone have experience applying Figure U-10, Choking Mass Flow Rate (for isentropic process and equilibrium conditions) of the ASME Steam Tables For Industrial Use. The Figure assumes an isentropic enthalpy drop. I have read many of the postings concerning the lack of choking across a...