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  1. macki2009

    NDT for Hot tap - welding a NPS 6 "O-let" unto a NPS 12 pipeline

    I am preparing to weld a NPS 6 O-let branch unto a NPS 12 mainline. the welding procedure does not specify any details about NDE/NDT, a colleague says we have to use liquid penetrant after each pass, can anyone shed more light on this scenario, please. which is better, magnetic particle testing...

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