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Boiler construction

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Garry Coles25/01/2023 14:43:24
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121 forum posts
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Hi, I want to buy a copper boiler for a 5in gauge loco that I will be building. I've had various quotes that have ranged from £3100 for TIG welded to £6500 for silver soldered. My question is, what are the pros & cons for silver soldered or TIG welding. Which would you recomend.

Garry

Luker25/01/2023 15:57:24
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230 forum posts
172 photos

Hi Garry,

The main difference, as you pointed out, is cost. The joint design for the two different boiler construction methods needs to change, but provided the boiler is designed for the specific joint construction method there will be no difference. I have designed and built both TIG and silver soldered boilers and both work perfectly. My personal preference is TIG due to cost, and the fact that a crown stay is safer to construct using TIG (silver solder could let go when heating the stays in the firebox, and has happened once to me. A mission to fix!).

BTW those prices are ridiculous! You can buy a decent second hand vehicle for that (in my neck of the woods)…

Dave Halford25/01/2023 16:22:52
2536 forum posts
24 photos

Ask TIG at the track that you wish to run on.

Brian Baker 125/01/2023 16:30:52
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229 forum posts
40 photos

Greetings Garry, ask the boiler inspector at the club you wish to run at,

regards

Brian B

Garry Coles25/01/2023 16:33:34
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121 forum posts
100 photos

I live in Jersey and as far I know there are no model boiler inspectors over here.

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