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I was reading the threads in this forum and forgot I was here when I posted. I meant to post in the Boiler & Pressure Vessel engineering forum.

Try using Newton's Third Law

Does anyone know why CodeCalc uses the BC dia as the load reaction diameter in lieu of gasket reaction dia G for TEMA cover deflection calc? thanks

htman You may want to take a look at ASME publication82-JPGC-Pwr-1 "Hydro expanding: The Current State Of The Art" by S. Yokell. Like gr2vessels stated roller expanding is generally adequate. There are several factors that can affect joint integrity such as: cleanliness, tolerances, material...

PVd There are a few factors that need to be looked at when dealing with heads. 1. The ASME Sec VIII Div.1 calculated required thickness which is as you stated. 2. The min wall thickness called out on drawing & U1 form. This is generally the starting thickness of the head minus the forming...

I'm relativeluy new to ASME Sec VIII, but wouldn't Sec VIII Div.3 be more appropraite for this vessel?

I believe the allowable stress variation is due to the manufacturing process, which can be cold worked or hot finished, with the cold worked having the higher allowable stresses. This should be fun for the material procurement guys, especially since they (ASME) don't differentiate between the two.

Joetank is correct SA370 gives the test requirements and also states: 22.1.1 "Test location and orientation should be addressed by the specification. If not, for wrought products, the test location shal be the same as that for the tensile specimen and the orientation shall be longitudinal with...

I got the same result as Doct9960. See attached http://files.engineering.com/getfile.aspx?folder=6ade686a-1f51-4e8b-a4f0-62c8fd1a617e&file=Mathcad_-_Roark's_Formulas_for_Stress_and_Strain__Table_26,_Case_2a.pdf

Metengr I read UCS56 note 2, does this apply to my case due to filler metal? It does say "welds made between a P-No-b Group 2 and another lower chromium ferritic, austenitic, or nickel based steel" then it mentions the filler metal.

Thanks for the info Metengr. I had to shake my head myself on this one. I was dealt the hand and am trying to deal with it best I can. Apparently SA387 Gr 9 is not available so someone got the bright idea to go with modified 9 Cr. The tubesheet is explosion bond clad. Thanks for the info.

I have what I believe to be a predicament. 516-70N tube sheet clad with 3/8" SA387 Gr.91 plate. The cladding is by a reputable manufacturer and all seems to be in order. The tubes for this TS are SA213 T9. Tempering temps for the tubes and cladding are 1250°F & 1350°F respectively. The tube to...

"Yes again. A 234 has a Tensile strenght 15% more than A106 Grade B." DCasto, I have a couple of questions: 1: How can a fitting be rated for a MAWP without the operating temperature? I can understand the 2000 psi at ambient but I'm assuming the reducer would not be operating at ambient. 2...

Rookie question. Would it be possible that the level control system malfunctioned causing the shell side fluid to evaporate completely while allowing hot tube side gas to flow?

If you are referring to a TEMA type BKU unit , then yes it is applicable. Specifically UNX-12.

I have come across this issue before with heat exchanger design. This one instance involves an ASME tubeshhet which is integral with the channel. TS material is SA336 F11 Cl.2, mating flange is SA266-2, Tubes are SA268 410. Existing tubesheet is 11 1/8" thk x 62-3/8" od. Existing flange is...

When are Elastic Plastic calculations applicable in the design of heat exchangers & vessels? thanks

Can anyone tell me where I can find axial expansion in the analysis (Codecalc or PVElite) for a F&F expansion joint? I found the spring rate but no axial data. thanks

Thank you for your helpful insight! I was under the impression that it was not wise to PWHT above tempering temp.

I am working on a PV/HE that has 3.25" thick SA387 Gr.11 Cl.2 tubesheet (TS) clad with SA240 304 on the tubeside only. The TS will be welded to a 1.125 thick SA516 70N shell. The TS was tempered at 1178 °F. ASME Sec VIII Div.1 requires a PWHT of 1200 °F. This will be a local PWHT at the shell -...