that number did not come frome air we have to look closely at the mater .being a certifeid welding inspecter & welding superviser to both pressure equipment & structural when i face a problem like that i,ve to
make a decesion ,you must look at, joint, repaire lokation ,the defect size ,acssesability ,to deside to repaire 1,or,2,to,3 times max to comply with the relavent standard if you using ASME OR INTERNATIONAL ONE OR ,,,,? NOW IF THER IS A PROBLEM FROM THE WELDER I HAVE TO RE-QUALIFY HIM OR RE-PLACE HIM
i hope i made it clear to you mr GIOVANNI,,,,,,,,,,.
M EL-SABSABI
SYDNEY AUSTRALIA.
I differ with you on failure beyound 3 times sir. I can tell you of a great many items in service that get cut away and rewelded every three years for the past 30 that I have been doing it. I belive that is why we have procedures to show it can be done. The items I refer to see some very heay stress of all types.
Dear Mr. El-Sabsabi,
I think we're saying the same thing with different words. When I said that the quantity of times that a joint can be repaired is 3, and that that is a "magic number", I intended to say that, before deciding how many repairs you can make, you should carry out a careful study on the matter based on a series of considerations (most of which you list in your answer), and then, using your good engineering judgement, take a decision. You might decide that only one repair is possible, or you can decide, as Ron says in his answer, that many are possible.
What did you intend to mean by saying "legend"? Is not the same as "magic number" in a different expression?
Best regards
Giovanni S. Crisi