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Thanks for your comments. They've been very valuable. I guess a heat exchanger TEMA type with removable bundle is a must. BEU would be an option instead of an AES type (with floating head), since AES type would promote stagnation of liquid in the area between shell and floating head. For U...

A shell-and-tube heat exchanger for handling an easily polymerizable substance (condensing in the shell side) needs to be designed (with a removable bundle for easy mechanical cleaning). Working conditions are around 50/60ºC and near vacuum pressure. I'm looking for any guidelines or previous...

Hello, I need to do a calculation of a test ring for hydrotest for a BEU tema type shell and tube heat exchanger. Mechanical design software (Compress or others) usually don’t have the exactly way to model this ring with the special considerations that implies. For example, if test ring is...

Hi... You can try this website from Lummus Technology Heat Transfer: where they have available a HELIXCHANGER® Heat Exchanger Selection Guide Model. http://www.lummusonline.com/global/index.htm (go to Lummus Heat Transfer - Helixchanger homepage - Helixchanger selection guide) I think this...

The general conditions of applicability for tubesheets of ASME Section VIII UHX-10(a) require the tubesheet be uniformly perforated over a nominally circular area. The definition regarding "nominally circular area" has been a contentious issue on most shell and tube heat exchangers, as very few...

I am working in the design of a steam generator (like a Kettle or similar heat exchanger type) for a thermal solar power plant. Working temperatures will be around 390ºC @ 120 bar. The problem we are trying to solve regarding material selection is the fact that this equipment will have...

...correction: SA-320-B8 (304 type) = 32 bolts x 4" PGh.

Mechanical calculations shows the following: For bolts SB-637: 32 bolts x 3” For bolts SA-320: 32 bolts x 3.5” For bolts SA-453: 32 bolts x 3.75” As you can see, all these bolts are feasible, and flange and cover can be adapted to any of these bolts (of course smaller bolts is always better)...

We have a high pressure Heat Exchanger in cryogenic service. Materials shall be SS-304. Channel is design for 130 bar and for a MDT = -196ºC. The closure of the channel shall be as per drawing attached. For this case, bolts size define the thickness of the channel, so bolt diameter should be...

Thanks for all your replies, It seems that CS loose Lap joint Flanges are ok with the Ti vessel. I'll take in account the recommendations on this forum. Also the bolts seem to be ok in SS. In fact this is a heat exchanger with sea water inside the channel (tubeside) and its fixed tubesheet...

This is a vessel made with Titanium plates (no cladding) of 13mm with two forged covers at both sides. Nozzles necks are with Titanium as well. Vessel ID = 1800mm (70”) design pressure = 13 bar (188psi) and Design Temp = 65ºC (150ºF), Vendor is proposing that all main flanges and nozzles...

I am designing an Air cooled Heat Exchanger (API 661), forced draft. And I have three bundles (each bundle handle a different service and the three are on one bundle sharing the pair of fans. Could the bundles be completely different from each other, (it means, different number of rows, tube...

I have an air cooler for Hydrogen service with high pressure. It is specified that header be plug-box type, which is ok. But it is also specified that tube to tubesheet joint shall be strength welded. Is this mechanically possible? If API 661 establish that PWHT shall be performed before...

I hope this information will help find the right solution: When a heat exchanger has a flow-induced vibration problem, some corrective actions are available to reduce or eliminate the problem. First, verify that the vibration arises from shellside flow, not from some other external source...

Hello...! I am trying to find more information about Robert type evaporators. They are usually used in sugar industry. I am trying to find some typical specifications, sketches, etc... Any help is much appreciated. GH

Metengr, May you please tell me where in ASME B&PV is indicated the requirement of steels that have 0.24% or greater carbon contents to be killed ??? Thanks a lot for your reply...! GH

Killed Carbon Steels are usually specified for many vessels and heat Exchangers. ASME materials like SA-516 and SA-106 are killed (per ASME spec.) Tubing and forging materials like SA-179 and SA-266 are not killed per Specification, so should I specify these materials should be killed??? Is it a...

I have a Shell & Tube Heat Exchanger in Wet-H2S service (both sides), and it is specified that NACE TM-0284 shall be met. For this exchanger (all parts and components) it is also required to meet NACE MR-0103, which is ok. My question is: NACE TM-0284 tests for HIC shall be performed for all...

I have specified an Air cooler with forced draft. But now, I have to change to Induced draft, keeping geometry, motor and fan power the same as in forced draft. I know that the performance is not going to be the same, but the equipment working with induced draft is performing acceptable. My...

I have a Shell & Tube Heat Exchanger where tubes shall be SB-111 C71500 (Cu-Ni 70-30). In this order: 1) Channel is Carbon Steel with Cu-Ni 70-30 cladding. 2) Tubesheet is forged Carbon Steel with Weld Overlay Cu-Ni- 70-30 (channel side). Is it correct to specify: SA-516-70 + cladding Cu-Ni...