Superheater material

Superheater material

This topic has 4 replies, 5 voices, and was last updated 20 November 2025 at 08:24 by Brian Baker 2.

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19 November 2025 at 16:34 #825291
Dougie Swan
Participant
@dougieswan43463
Hi

I’m currently building a 4″ dia vertical boiler and wanted to know if copper is a suitable material for a superheater

This will be vertical through the 28mm main flue

Any advice would be appreciated

Thanks

Dougie
Advert

19 November 2025 at 17:33 #825312
noel shelley
Participant
@noelshelley55608
I have a 6″ vertical and my superheater elements are copper. I see no good reason, the more so in a vertical not to use copper easy to make and easy to repair or replace. Put a solid copper block on the end (hot ). Noel.
20 November 2025 at 07:25 #825356
Speedy Builder5
Participant
@speedybuilder5
Copper tube and brazed (Sifbronze) joints
20 November 2025 at 07:49 #825358
JasonB
Moderator
@jasonb
I would have thought with it going into a 28mm pipe you could probably bend a “U” shape and avoid solder or braze, subject to the diameter of your S/H tube. Maybe even a lollypop shape would work as you could feed it up from the bottom with plenty of room for the nuts on the tube ends.
20 November 2025 at 08:24 #825366
Brian Baker 2
Participant
@brianbaker2
Greetings Dougie, if the superheater is to be exposed directly to the fire, i.e. the radiant type, I would much prefer to use stainless tubes, whereas in a non radiant situation copper would be OK.

Regards

Brian B
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