MadModder

The Shop => Metal Stuff => Topic started by: doubleboost on May 20, 2008, 05:11:37 PM

Title: STEEL BOILER
Post by: doubleboost on May 20, 2008, 05:11:37 PM

Hi
I am buisy building a steel boiler for a marine engine
The boiler shell is 8 inch diamiter 22 inches long 8 mm wall thickness
The tube plates are 10 mm thick 19 - 1 inch tubes
I have a 140 amp TIG inverter and a migatronic 160 amp MIG
Would it be best to put in a TIG root weld then run MIG in to the joints or just tig weld the whole thing
The working pressure will be 125 psi
(http://i261.photobucket.com/albums/ii63/john970s0/P5200009.jpg)
boiler end plate counter sunk
(http://i261.photobucket.com/albums/ii63/john970s0/P5190008.jpg)
(http://i261.photobucket.com/albums/ii63/john970s0/P1010010.jpg)
1 1/2 bsp wash out plug TIG welded inside and out
Regards
John

Title: Re: STEEL BOILER
Post by: Brass_Machine on May 20, 2008, 10:41:10 PM

Nice work so far. I really don't have an answer for you as my knowledge of welding is very limited. Personally I would TIG it. But you may want to hop over to Welderzone (http://welderzone.com/) and ask there. Being a boiler, I would be very careful.

Eric

Title: Re: STEEL BOILER
Post by: PTsideshow on May 21, 2008, 06:39:04 AM

Very nice work on the plug, I to would have to say that if you are doing that nice of TIG, why do any other. On a side note, you can all ways take some scrap material you are using for the boiler. Prep it and weld it then cut it thru the weld to check out your penetration etc.
I posted some links for a boiler code and another forum with boiler info on it. Here in the resources section
http://madmodder.net/Forum/index.php?topic=200.new#new (http://madmodder.net/Forum/index.php?topic=200.new#new)
 ;D

Title: Re: STEEL BOILER
Post by: doubleboost on June 25, 2008, 07:04:25 PM

Hi
Did some more to the boiler today decided to tig the whole job
(http://i261.photobucket.com/albums/ii63/john970s0/P6250094.jpg)
first run (root weld) 140 amp
(http://i261.photobucket.com/albums/ii63/john970s0/P6250098.jpg)
(http://i261.photobucket.com/albums/ii63/john970s0/P6250097.jpg)
I ground a champher on the plate 3/4 its depth the weld went all the way through
Regards
John

Title: Re: STEEL BOILER
Post by: PTsideshow on June 25, 2008, 08:17:19 PM

Looking good smart chose! ;D

Title: Re: STEEL BOILER
Post by: Bernd on June 25, 2008, 08:55:05 PM

Nice job on those welds.

Bernd

Title: Re: STEEL BOILER
Post by: Brass_Machine on June 27, 2008, 11:46:32 AM

Hey John!

That is looking very nice.The welds have that nice stacked dime look. Very nice.

Keep the pictures coming

Eric

Title: Re: STEEL BOILER
Post by: doubleboost on June 27, 2008, 05:52:19 PM

Hi
My tig welder is lacking in power to put the fillet welds on the tube plates
I used some 3.5 super chrome rods at 110 amps pleased with the results not as pritty as tig but really strong with good penitration
(http://i261.photobucket.com/albums/ii63/john970s0/P6270104.jpg)
(http://i261.photobucket.com/albums/ii63/john970s0/P6270112.jpg)
This is my tig inverter it runs mma great

Title: Re: STEEL BOILER
Post by: Powder Keg on July 24, 2008, 09:31:35 PM

Looking great!!! What are the tubes going to be made out of? Copper?

Thanks for sharing, Wes

Title: Re: STEEL BOILER
Post by: Circlip on November 30, 2008, 02:40:15 PM

Looks impressive John, is it a standard design and did you keep the material and coding certs for when the boiler inspector tests it for insurance purposes. ?

 Regards  Ian.

Title: Re: STEEL BOILER
Post by: Darren on December 09, 2008, 04:51:41 PM

John, if that was my welding I'd be very pleased with myself.....looks great... :wave:

Title: Re: STEEL BOILER
Post by: doubleboost on October 01, 2011, 03:12:38 PM

Hi
This is a post from some time ago
The boiler has been standing in the shop with a bench grinder fastend to it for a couple of years now
Decided to sort out a boiler for my engine
After a cold start i had 90 psi within 20 minutes
I need a water guage and a feed pump making
(http://i261.photobucket.com/albums/ii63/john970s0/PA010057.jpg)
(http://i261.photobucket.com/albums/ii63/john970s0/PA010058.jpg)
(http://i261.photobucket.com/albums/ii63/john970s0/PA010055.jpg)
John