Thank you codeeng and juancito. The spec I was given only allow set-on nozzles for nozzle size 2 inch and less AND only with parent metal ultrasonically tested. I believe the reason is exactly as you had mentioned - avoid the problem of lamination or lamellar tearing of the parent metal. I would...
Here is an old familiar question on nozzle design: "Set-on" or "Set through"? Both are permitted by PV codes, but most company specs do not allow "set-on" design except for small nozzles. Can anyone advise what the pros and cons for both designs? What are we giving up in choosing "set-on"...
