Is there any international codes or standards like API code, AWS code, ASME BPVC which provides the maximum possible number of repair welds that can be done on MS or SS or dissimilar weldments?? Or if someone worked or published their works related to the mentioned area, please provide some details...
best regards
some authers say: '' weld seams may only be repaired twice in the same area”, whereas it is not mentioned in the API 1104 standards or the ASME IV section that is specific to crude oil and nature al gas transportation.
you can also see the paper of O.E Vega about the:Effect of multiple repairs in girth welds of pipelines on the mechanical properties
link: http://www.sciencedirect.com/science/article/pii/S1044580308000387
I hope it will help you.
I agree with ''weld may only be repaired twice in the same area”. This is also the current practice for welded joints of steel bridges. However, I don't know if there is a standard concerning this practice then after two repairs, welding simply doesn't work : if you try still repairing you will get cracks. These cracks will be detected by the control.
Flanges of steel bridges are always welded in France with thickness of plates reaching 150 mm. The oldest all-welded bridge in the world still in service today is the Neuilly bridge near Paris ( built 1941 ie during WW2 with its related problems). Today it also supports an additional Metro line.
Regards.
Hello Mr. Siva,
This question was answered by me long time back. Multiple weld
repairs in the same area is not recommended as it affects the final
micro of the weld area and the resultant properties are also well below
standards requirements- This was based on practical experience carbon
steel materials. Codes/ standards never recommend frequent weld repairs
in the same area. Why do not you refer IBR regulations?
Thank you Mr. Viswanathan...
IBR contains any information about multiple repair welding?
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