Dear Priyanka,
-- You may try coating the fins material with Plasma Nitriding or CN or DLC Coating. Will provide the details once you confirm the material.
--
2011/12/26 Priya Deshmukh <piyuwillseeu@gmail.com>
Dear Sir,
More hardness of the fin is required because it is used in heat
recovery of exhaust gases having abrasive particles in it.
The temperature might be around 450 deg. C and particles are abrasive
eroding the fin surface.
Please reply if you have some solution.
Thanks & Regards,
Priyanka Deshmukh
> *
On 12/26/11, pgoswami <pgoswami@quickclic.net> wrote:
> Hi Priyanka,
>
> What are the design conditions for the air cooled finned exchangers, e.g
> operating media, design temperature , materials of construction? .Is the
> intended application is for refinery or other type of plants ?
>
> Generally pure aluminum is popular as fin material, however it does not
> offer much scope for improvement of hardness as this this material is not
> heat treatable. Improvement of hardness through surface coating or thermal
> spray may impair corrosion resistance and the heat transfer coefficient.
>
> Below are some extracts on recommended material of construction for fin
> tubes, typically for oil and gas applications from various appropriate
> specifications.
>
> Thanks
>
>
> Pradip Goswami,P.Eng.IWE
> Welding & Metallurgical Specialist & Consultant
> Ontario,Canada.
> Email-pgoswami@sympatico.ca,
> pgoswami@quickclic.net
>
>
> Tubes with embedded aluminum fins or hot-dip galvanized steel fins,> *
> applicable up to a maximum operating temperature of 360 °C, should be used.
> Hot-dip galvanised steel fins shall not be used on austenitic steel tubing.
>
>
>
>
>
> -----Original Message-----
> From: materials-welding@googlegroups.com
> [mailto:materials-welding@googlegroups.com] On Behalf Of Priya Deshmukh
> Sent: Saturday, December 24, 2011 1:24 AM
> To: materials-welding
> Subject: [MW:13288] To increase hardness of Heat Exchanger fin
>
> To,
>
> All.
>
> Please provide me the procedure to increase the hardness of fin material
> without affecting its thermal conductivity.
>
> May be some spray or liquid may be available, by spraying or dipping the
> fins into the liquid the hardness can be increased.
>
> Thanks,
>
> --
> Priyanka Deshmukh
>
> --
> To post to this group, send email to materials-welding@googlegroups.com
> To unsubscribe from this group, send email to
> materials-welding+unsubscribe@googlegroups.com
> For more options, visit this group's bolg at
> http://materials-welding.blogspot.com/
> The views expressed/exchnaged in this group are members personel views and
> meant for educational purposes only, Users must take their own decisions
> w.r.t. applicable code/standard/contract documents.
>
>
> --
> To post to this group, send email to materials-welding@googlegroups.com
> To unsubscribe from this group, send email to
> materials-welding+unsubscribe@googlegroups.com
> For more options, visit this group's bolg at
> http://materials-welding.blogspot.com/
> The views expressed/exchnaged in this group are members personel views and
> meant for educational purposes only, Users must take their own decisions
> w.r.t. applicable code/standard/contract documents.
>
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
regards,
Harish.
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
No comments:
Post a Comment