My SteamPunk boiler

patrykrebisz · October 7

At the beginning of last winter i've zeroed out my automatics water feeder. At the end of the season it read 247… Not good!

Opening the boiler covers i saw a sorry state of the boiler's top - with huge rust holes.

I though i could seal it with some kind of steam-resistant high-temp epoxy.
I've searched long and identified some pro epoxies uses used in the oil industry. Sales rep has confirmed that it could work (key word: "sales rep"...)

I cleaned up the surface prepping it for the epoxy. I filled the holes with the marine version of JB Weld (btw, very good epoxy!)

Then covered the top with the "pro" grade reinforced with some carbon mesh.

Soon i started having doubts.
In my research i didn't consider high temperature of the flue gases. Though metal jacket heats up only to around 250F, the surrounding flue gases can get to 600F (the verge of the epoxy stability).

Even before fire test, i started thinking about plan B.

Test fire has confirmed my doubts.
The surface, despite the prep, showed epoxy delamination due to rust developing between epoxy and the cast iron. Surprisingly, the water resistant JB Weld held quite well.

The boiler was "dead" again so i removed the epoxy and this time chose not to stop until i found some solid metal. The holes kept on growing...

I started to think the whole cast iron section turned into a clump of rust held only by wishful thinking. That said, i started to see some hope. Some chunks were still quite thick. If i could manufacture metal plates, drill then tap some holes to hold those plates then maybe - just maybe - i could get another heating season out of this boiler.

I drilled some holes in strategically located places. Surprisingly all had enough metal to tap those with at least a few threads.

Some extreme heat silicon (rated at 750F) was applied to create gasket between cast iron and metal plates.

The plates were bolted onto the boiler with stainless screws (ah, why not at this stage?).

After a few days of firing, so far so good.
Wish me luck this heating season!
(i'll update you as the months go on)

Steamhead · October 7

Never seen that done before- it'll be interesting to see how it works out. That said, start saving for a new one. And make sure there aren't any leaks out in the system- fresh water shortens the life of a boiler.

EBEBRATT-Ed · October 7

Yeah, I would start saving………….and I would save fast! I don't know if you're going to install the new one yourself or not but if it was me, I would size the new boiler and have it in the basement on standby.

But I commend your ingenuity you did a neat job. Just doubt it will last.

mattmia2 · October 7

The boiler itself isn't all that expensive, for that amount of work you could have replaced it.

ethicalpaul · October 7

It's kind of ironic…the boiler will have to be replaced, there is 100% no doubt of that. The question is when. You have gained a year or maybe 3, and boilers will be more expensive then, so unless you are investing all that money in something that can beat inflation, you just cost yourself money in addition to all your effort.

When you get a new one, be sure to size it to your radiation, the existing one is almost certainly oversized.

ChrisJ · October 7

https://forum.heatinghelp.com/discussion/comment/1867002#Comment_1867002

I'm not so sure I agree. They're far from free, that's for sure.

It seems like boiler prices have gone through the roof vs when i bought mine back in 2011. I understand inflation etc, but it just seems like it's far more than that. Off the top of my head, I think my EG series costs double what I paid yet I think inflation is less than 50% since then.

Maybe I'm just remembering wrong.

Grallert · October 7

You know what else you could do? Add some sodium silicate to the boiler, flood it and bring it up to near boiling. That water glass will find any small hole and seal them.

ethicalpaul · October 7

I think my EG series costs double what I paid yet I think inflation is less than 50% since then.

Inflation of your boiler, according to what you said above is 100%. The inflation of eggs and stuff isn't relevant to this.

I should have said "…so unless you are investing all that money in something that can beat boiler price inflation…" for clarity

mattmia2 · October 7

The price of construction materials has gone up a lot faster than average inflation because of demand in countries that are transitioning from rural to urban environments. The materials to install my 100' of gutter with stainless hardware and 100' of fiber cement fascia cost over $2k.

ChrisJ · October 7

https://forum.heatinghelp.com/discussion/comment/1867053#Comment_1867053

They're using a lot of cast iron boilers in these transitions?

mattmia2 · October 7

https://forum.heatinghelp.com/discussion/comment/1867059#Comment_1867059

they are using a lot of steel which drives up the cost of cast iron.

SlamDunk · October 7

necessity is the mother of invention. That actually looks pretty good.

The temperature changes and different expansion rates of the two steels may cause looseness in the bolts, so maybe check their torques until you are comfortable they wont loosen.

patrykrebisz · October 7

At this moment, the boiler is a "science experiment".

Will it last? Yes, it will.

How long? Noone knows.

Yes, when i see a sign of leakage, i'll clog all my radiator vents with temporary plugs and add some boiler stop-leak (so the vents don't get clogged with that stuff)… after all, with 250 fresh water units in one season, this thing has drank itself to death.

mattmia2 · October 8

the fresh water will corrode everything below the water line, not just the boiler.

ethicalpaul · October 8

https://forum.heatinghelp.com/discussion/comment/1867100#Comment_1867100

I disagree with that, but different opinions is what makes the world interesting!

patrykrebisz · October 8

"The speed of corrosion for a metal is highly dependent on its specific location relative to the waterline. Generally, the most aggressive corrosion occurs not when the metal is fully submerged or completely dry, but in the area that is intermittently wet, known as the splash zone or waterline region."

Which puts in question how my specific corrosion has occurred.

ethicalpaul · October 8

That boiler in particular (if it is, as it appears to be, a Burnham IN series), but lots of other boilers too, maybe all atmospheric boilers, rust out at the top I believe because at the top the temperatures are hottest from the lack of liquid water up there

There are a few variables that affect rusting rate and temperature is a significant one of them

There is some discussion out there that the IN boilers' castings may be thin up there as well but I have no personal knowledge of that.

Keep in mind the entire interior of that style boiler probably isn't very dry ever.

My SteamPunk boiler

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