Welded smoke pipe 1

[ElCidCampeador]

I was told that for water bath heaters, like these:

https://www.gasco.net.au/wp-content/uploads/2017/11/Todd_Energy_Water_Bath_headers.jpg

smoke pipes used in it are commonly welded, especially if they are very long and longer pipes from stock aren't available.

But when I try to ask if there is a sort of calculation or technical verification that allows the use of welded pipe, people always told me that it's "common engineering practice".

I don't understand: is it a sort of "professional secrecy" or is it really unnecessary to check it from a technical point of view?

Thanks

 

[LittleInch]

I don't understand the question.

Welding is how you connect pipes without a mechanical joint.

What is the issue here?

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[ElCidCampeador]

The issue is the fact that these pipes are subjected to specific mechanical and thermal stresses (maybe also fatigue cycle) due to smoke pipe application, I'm wondering if it's required a particular set of calculation to check their use and verify welded joint...seamless or welded are not the same

 

[LittleInch]

So do you mean seam welded pipe vs seamless?

Agreed, but these are very low pressure tubes.

I cant see them coming under any real design code other than a manufacturers specification or design use.

I also can't see anyone actually looking closely at the difference.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.