Head thickness on Nameplate
Head thickness on Nameplate
(OP)
Hi all,
Our customer asks us to show shell/head thickness on their nameplate, so i wonder which head thickness shall be indicated in the nameplate, min. thickness after forming or nominal used thickness?
At first, I used min. thickness after forming to show that this is the limit thickness but i got the comment to show the used thickness.
Please advise your all opinions.
Thanks
Our customer asks us to show shell/head thickness on their nameplate, so i wonder which head thickness shall be indicated in the nameplate, min. thickness after forming or nominal used thickness?
At first, I used min. thickness after forming to show that this is the limit thickness but i got the comment to show the used thickness.
Please advise your all opinions.
Thanks





RE: Head thickness on Nameplate
Head: 14/12 (For example) (Nominal/Minimum)
Shell:12
RE: Head thickness on Nameplate
RE: Head thickness on Nameplate
At least they can never find them when they are needed.
The only thing that I would put down is "design minimum" since that is what you are responsible for.
If they want actuals then they can measure them.
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P.E. Metallurgy, Plymouth Tube
RE: Head thickness on Nameplate
RE: Head thickness on Nameplate
But the design/engineering team/company can't really control the "actual, as-built minimum" thickness, and can only certify it on the nameplate if they are able to measure the whole fabricated head fairly closely under controlled conditions. And even then there are going to be +/- values involved.
Customer rules of course, but you really do specify in the "design" a minimum thickness taking into account unknown future corrosion losses, fabrication tolerances, material tolerances. So you "buy" a nominal thickness.
RE: Head thickness on Nameplate
RE: Head thickness on Nameplate
Any variation will be considered as non conforming situation