Nozzle requirements in API 560 9.2 standard
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Why are the requirements for pipe ends in API 560 Standard 9.2 so strict? Is it really possible to meet them? What would happen if it exceeds a little bit?
It’s difficult to achieve. If it exceeds slightly, you can contact the furnace manufacturer and provide them with the stress calculations for the pipe ends for verification.
That’s quite difficult to achieve; it’s necessary to have the manufacturer check it!
Although it is quite difficult to achieve, it is not impossible. For the heating furnaces used at the start of several projects I have worked on, two of those projects met the requirements of API 560 ； If it is truly impossible to meet this requirement, it can generally be submitted to the manufacturer for reevaluation, and the result of that reevaluation will determine what to do.
Yes, that’s exactly what we do: we get it as close as possible to the standard value and then send it back to the manufacturer for further calculation!