You can ALL CAPS "shout" all you want but the fact that TEMA now has a separate Appendix (and a non-mandatory at that) covering Repairs proves that the TEMA standards were never intended for new equipment. Table RCB-9.131 is not located inside Appendix B so it would not apply to this repair...
Please ignore r6155's comments. I suspect that he suffers from Advanced Senile Dementia, which would explain the hostile behavior and the irrelevant citation above. Furthermore he's never demonstrated any knowledge whatsoever of heat exchangers in his previous posts here.
TEMA standards are for...
"Original Code of Construction" just means if it was built per ASME Section VIII Div 1 you must follow ASME Section VIII DIv 1. It does not mean that you must comply with the original Edition of the Code of Construction (although this is usually permitted).
"INTERPRETATION 07-13
Subject: The...
"Your observation that there's inherent 'mystery' to the hub factors did cross my mind too... would be helpful if anyone could point to the historical basis for these. Likely a bulletin or journal entry from years ~1900-1925..."
Close, the procedure for designing flanges was outlined in...
I think you're going to have problems here. As you stated nothing in Appendix 2 (or any code for that matter) provides guidance on how to design a hubbed integral flange with the taper on the ID, so you would have to approximate it by setting g1 equal to g0. But the problem you'll have is that...
That's unusual. I don't think I've ever seen an alloy-clad tubesheet specified where the tube material didn't match the cladding material. Whether the cladding was added to protect against HTHA or some other corrosion mechanism the tubes would be left vulnerable.
Were Strength Welded...
"Kammprofile" is a common industry term for Grooved Metal gaskets with a soft facing, usually flexible graphite. Suggested "m" and "y" values for Grooved Metal gaskets have been listed in Table 2-5.1 of ASME Section VIII Division 1 for 40+ years.
-Christine
Good question. What Krausen mentioned above is correct, all else being the same you would need your shell to be 0.5 inches larger in diameter if you specified Spiral Wound gaskets in a floating head exchanger due to the inner ring. But it's still quite rare to see Spiral Wound gaskets used with...
I've never seen those terms before but my guess is that "Slip" might refer to skid bars which are typically made from flat bar and are welded to the baffles/tubesheet and "Rod" might refer to bundle slide rails which made from round bars and are welded to the bottom of the shell (only applies to...
Taylor Forge Bulletin 502 would probably be a good place to start. SnTMan uploaded it in this previous thread:
https://www.eng-tips.com/threads/why-gasket-load-formula-3-14gby-in-wm2-and-why-is-it-3-14g-2b-m-p-in-wm1.479812/#post-8658153
-Christine
A nozzle reinforcing pad is a pressure-containing part so welding on it would be considered to be welding to the vessel pressure boundary, but sometimes pads (not reinforcing pads) are installed on vessels in the fab shop prior to hydrotesting to allow non-Code field welds to be made to the...
In some cases the required bolting area is set by the Gasket Seating condition, not by the Operating condition. Factors that can cause the Gasket Seating condition to govern include low design pressures, small vessel diameters, wide gasket widths, and/or difficult to compress gasket materials...
I think it would be helpful if we knew if you are the vessel fabricator or if you are the end user of the vessel, but in either case ASME Section VIII is a design/construction code so it's applicability ends the minute the Authorized Inspector (AI) signs the U-1 Manufacturer's Data Report. Any...
If this is a Section VIII Division 1 vessel you are allowed to attached non-pressure parts using fillet welds with a throat size of up to 1/2" without having to perform PWHT per Note (b)(3)(c) in Table UCS-56-1.
-Christine
I haven't read through the latest version of the NBIC code but I've seen many Repairs performed in the past where the contractor just stamped the company name/"R" stamp number/Date directly onto the vessel in the vicinity of the existing name plate without attaching a new name plate.
Another...
It's because the exchanger has the same process fluid being routed through the shell side and the tube side, with one side being hotter after going through an exothermic reactor or similar process. If there are no valves that can be closed then maximum pressure differential that the tubes and...
I'm not familiar enough with Section I to answer the question, but my guess is that this is likely allowed. Check with your A.I.
There is a false perception that anything that looks like a poor design practice is expressly prohibited by ASME Code, but the reality is that many things that would...
TEMA allows the use of differential pressure design where specified by the purchaser but doesn't provide any guidance on performing a differential pressure hydrotest. IOGP Standard S-614 just says that differential pressure heat exchangers designs must include a warning nameplate stating the...
Just to clarify what I believe the OP is talking about, the exchanger in question is most likely a high-pressure Feed/Effluent exchanger. As such, the operating pressure seen on the low-pressure side of the exchanger cannot be any less than the operating pressure on the high-pressure side minus...
