Pipe cutting to release tension - sprung doors

Horizontal smokers with a side firebox and tuning plates.
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dacolson
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Pipe cutting to release tension - sprung doors

Post by dacolson » February 26th, 2021, 6:43 pm

I thought I should follow up on a method Hogaboomer posted about a while ago on cutting a pipe lengthwise to release tension in the steel and avoid sprung doors. Today I cut the pipe and crossed my fingers it would spring out instead of in. Success. The pipe sprung 1 1/2”. Next I’ll weld in a piece of 3/8” to fill the gap. I’ll post more pictures once I cut the doors which hopefully should stay perfectly flush.

Here’s the cut:

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Dave C - QueNorth Smokers
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Re: Pipe cutting to release tension - sprung doors

Post by hogaboomer » February 26th, 2021, 8:51 pm

I'm looking forward to seeing the outcome of this.


I live on Hogaboom Road.

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Re: Pipe cutting to release tension - sprung doors

Post by dacolson » February 26th, 2021, 10:06 pm

Ya. It will be a moment of truth cutting those doors.
Side question. You think the paint/enamel/whatever on the pipe will burn off?


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Re: Pipe cutting to release tension - sprung doors

Post by tinspark » February 26th, 2021, 11:58 pm

dacolson wrote:
February 26th, 2021, 6:43 pm
I thought I should follow up on a method Hogaboomer posted about a while ago on cutting a pipe lengthwise to release tension in the steel and avoid sprung doors. Today I cut the pipe and crossed my fingers it would spring out instead of in. Success. The pipe sprung 1 1/2”. Next I’ll weld in a piece of 3/8” to fill the gap. I’ll post more pictures once I cut the doors which hopefully should stay perfectly flush.

Here’s the cut:

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Yeah that was a pretty good video where some dude demonstrated the process of cutting pipe to release tension.. Good idea. If I ever do a cooker with pipe, I will try that method too. Slit to release stored tension, and fill back with flat bar.. Should keep the door from springing since the whole pipe springs open when slit, releasing the tension. Also relieves the headache of putting the door the door back to the tighter :ymapplause: radius
Last edited by tinspark on February 28th, 2021, 2:16 am, edited 1 time in total.


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Re: Pipe cutting to release tension - sprung doors

Post by Big T » February 28th, 2021, 12:15 am

This is pure speculation but I think the tan coating will burn off with a good fire. I've used pipe several times over the years with different color coatings and the only coating that I've had an issue removing was a red coating. I usually get a good bed of coals inside the pipe and I keep rolling it so that the coalbed comes in contact with the entire inner surface.


Measure Twice.....Cut Three Times.

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Re: Pipe cutting to release tension - sprung doors

Post by dacolson » February 28th, 2021, 2:13 am

Big T wrote:This is pure speculation but I think the tan coating will burn off with a good fire. I've used pipe several times over the years with different color coatings and the only coating that I've had an issue removing was a red coating. I usually get a good bed of coals inside the pipe and I keep rolling it so that the coalbed comes in contact with the entire inner surface.
Thx Big T. It is burning back from the torch cuts so I assume it will but it seems to be pretty serious stuff. It’s not the same as the red you mention. I’ve got some 10” pipe that has red and it’s almost like a powder coat - thick and textured/mat. This is smooth. Fingers crossed it comes off easy.


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Pipe cutting to release tension - sprung doors

Post by dacolson » April 14th, 2021, 10:08 pm

Update. Finally have room in the shop to start work on this pit. I welded a filler plate in today and cut the doors. Thought about using the grinder to avoid too much heat input but thought cutting 3/8” would take forever. All the door cuts were with the plasma torch. I went over them with a cutting wheel before I cut out the corners. Straight as an arrow. No warps. Thank god. After one run through I can’t say this is a tried and true method. But I’ll be doing it on the next build for sure.

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Re: Pipe cutting to release tension - sprung doors

Post by mp4 » April 15th, 2021, 3:21 am

Awesome write up - thanks much!



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Re: Pipe cutting to release tension - sprung doors

Post by dacolson » April 15th, 2021, 8:26 pm

YW mp4.

Last pics and I’ll start a build thread. Doors and edges all cleaned up.

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Re: Pipe cutting to release tension - sprung doors

Post by Chriz » April 16th, 2021, 12:32 pm

Looking good!
Curious how she’ll turn out


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