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Hello, Last year DK44 created a thread regarding drying of heat exchangers after fabrication and hydrotest (thread794-436465). I have this requirement on a job I am currently quoting. I would like to know the solution that was used and any suggestions. My requirement is 10 ppm of water. My...

Has anyone had any experience with outsourcing from the US, pressure vessel and / or shell and tube heat exchanger engineering to India?

My machine shop drilled too deep on some blind tapped holes, so that only .15" of thickness is remaining on the flange at the bottom of the hole (flg thickness is 1.5") They want to know if they can still use the flange. The only thing I can think of to justify this to my Code AI is to calc...

We have a type NEU complete carbon steel heat exchanger that needs to be post weld heat treated in it's entirety. I had planned to PWHT the shell and the bonnet, then welding the closing seams and do a local PWHT on them. The tube to tubesheet joints are strength welded. I have one person in...

Hello, We are designing over-pressure protection in an oil cooler, shell and tube heat exchanger to protect against high pressure drop during cold start up. This is to protect against damage to the baffles in the heat exchanger by supplying a relief valve around each baffle. We estimate that...

We fabricated some heat exchangers with 90/10 CUNI tubes strength welded to 70/30 overlayed tubesheet. The units passed hydro fine, but they will not pass helium leak test - we are getting leakage through the strength weld (which we determined after bringing a guy in who could sniff each tube)...

Hello All, We are submitting a shell and tube heat exchanger design for PED for import into the EU. As such, it is designed to ASME Sect VIII Div 1, and submitted to a Notified Body for review. The tube pattern is such that the tubesheets do not fall under the scope of UHX (large untubed areas...

We are a manufacturer of shell and tube heat exchangers. For years, we have been supplying units to Russian GOST for import to Russia, and it was no big deal. We designed and manufactured to ASME Code, created a vessel dossier, shipped the unit, and we were done. Now, we're hearing that we...