NEU Exchanger Manufacturing Sequence and Heat Treatment
NEU Exchanger Manufacturing Sequence and Heat Treatment
(OP)
We have an NEU Exchanger with heat treatment required on tube side as channel thickness 52 mm.
Tubesheet has integral lip on both channel & Shell sides.
The manufacturing sequence of this exchanger is as follow.
Step-1:Manufacturing of Tube Bundle including tube-to-tubesheet weld.
Step-2:Parallel manufacturing of channel including welding of girth flange and nozzles.
Step-3:PWHT of Channel (without channel being welded with tubesheet)
Step-4:Welding of channel with tubesheet and local PWHT of channel to tubesheet weld.
Step-5:Welding of shell with tubesheet from other side.
This local PWHT is carried to avoid letting tube bundle go inside furnace.
My question is:
Is the above sequence correct for manufacturing NEU Exchanger with PWHT required on tube side?
IS this right to avoid PHWT of tubes?
Regards,
Sarfaraz
farazhunzai@hotmail.com
Tubesheet has integral lip on both channel & Shell sides.
The manufacturing sequence of this exchanger is as follow.
Step-1:Manufacturing of Tube Bundle including tube-to-tubesheet weld.
Step-2:Parallel manufacturing of channel including welding of girth flange and nozzles.
Step-3:PWHT of Channel (without channel being welded with tubesheet)
Step-4:Welding of channel with tubesheet and local PWHT of channel to tubesheet weld.
Step-5:Welding of shell with tubesheet from other side.
This local PWHT is carried to avoid letting tube bundle go inside furnace.
My question is:
Is the above sequence correct for manufacturing NEU Exchanger with PWHT required on tube side?
IS this right to avoid PHWT of tubes?
Regards,
Sarfaraz
farazhunzai@hotmail.com





RE: NEU Exchanger Manufacturing Sequence and Heat Treatment
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: NEU Exchanger Manufacturing Sequence and Heat Treatment
what could be consequences of Heat treatment of complete tube-side along with tube bundle?
Regards
Sarfaraz
RE: NEU Exchanger Manufacturing Sequence and Heat Treatment
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: NEU Exchanger Manufacturing Sequence and Heat Treatment
I don't like it but they come out fine.
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P.E. Metallurgy, Plymouth Tube