Replacing corroded modern diesel boiler mild steel chimney

[DBA Forum (B) - David Beaumont]

Welding the thin (1mm) stainless to a thicker steel roof will be difficult. Do you really want to weld it anyway? Ours passes through a larger hole and has a heat resistant rubber gaiter/collar fitted. High temperature silicone sealant keeps it firm in position and off the mild steel.

David

[DBA Forum (B) - Jeremy May]

No expert, but isn't it surprising to have a flue welded to bulkheads rather than passing through a collar allowing some movement when the boat flexes? Like this for example?

https://www.limekilnchandlers.co.uk/index.php?_a=product&product_id=79

[DBA Forum (B) - David Beaumont]

here's what we have: [url=http://www.garagejournal.com/forum/showthread.php?t=169215]http://www.garagejournal.com/forum/showthread.php?t=169215[/url]

One advantage of having no metal to metal connection to the roof is that your chimney heat is not transferred to the roof and you will get a better draw.

David