[PSUBS-MAILIST] Cylinder tolerance

[via Personal_Submersibles]

That's pretty hefty for the radius. What's it for? And when will the longitudinal weld be performed? If your fabricator is doing that, then what tolerance can he manage after the weld to mitigate heat distortion?Vance


-----Original Message-----
From: James Frankland via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Sun, Aug 21, 2022 11:57 am
Subject: [PSUBS-MAILIST] Cylinder tolerance

Hi All
Im getting some quotes in for some rolled cylinders.  
What do people think i should ask for as the tolerance on roundness?
I believe (from memory) that the K350 plans specified "cylinder to be within 1/8th (3.175mm) on diameter for a 3ft (914mm) shell .
im quoting for a 650mm inside diameter 10mm cylinder.
Im feeling i want to ask for 1mm on diameter.
What do you guys think?

ThanksJames_______________________________________________
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