Stanweld:
I am running a design using S32101 wld tubes and c/stl tubesheet with 5/16" tk S32101 overlay. Tubes are strength welded to tubesheet. Current code does not include S32101 material and the only way I can get the stress values and other required data is through that code case.
Thank...
Hi All,
Can anyone provide a copy of code case 2418 or suggest where I could find one? Is it true that ASME provides code cases for free to all the code users? Did anyone experience strength welding S32101 tubes to c/stl clad with S32101 tubesheet? This is the first time we are trying to use...
HI All,
The exchanger that I am working on is built in 78. we are supplying exchanger less heads. Channels will be reused. My question is, do we have to design this unit using old alloable stresses or new. My understanding is if we are doing only part of the unit then anything that is built...
Hi All,
Can we use ANSI flanges as girth flanges for heat exchangers with more than one pass? Can you also specify where in code does it say whether we can or can not use ANSI flanges as girth flanges. Any help is appreciated.
Thank you all for your response.
No,I have not looked for the industry publised values yet.
Yeah,according to the definition 9.5 can be applied from 70F to 550F but I was not quite sure if that was correct.
Not available in B31.3. I am working on a fixed tubesheet shell & tube heat exchanger with carbon steel shell and 90Cu-10Ni tubes. Existing unit has no expansion joint and the customer has complained that there is a tube failure. Our program shows that the unit does not need an expansion jt as...
Thermal expansion coefficient for 90Cu-10Ni in section II Part D, Table TE-3 has a value of 9.5 at 550 F. The table doesn’t show values at other temperatures and neither does TEMA. How do we evaluate differential expansion of tubes at different temperatures other than 550 F? Any help is appreciated.
