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  • Users: AndyVictor
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  1. AndyVictor

    Hi, Code (ASME IX) mentions that

    Hi, Code (ASME IX) mentions that welders shall be qualified by mechanical testing. It also says welders may be qualified by RT. My doubt is who decides which one to follow? Regards AndyVictor
  2. AndyVictor

    PWHT of tube to tubesheet joints

    How can PWHT be conducted on a tube to tubesheet weld? Both new construction and also repair welds. Material is P No.4. Tube sheet thicness 90mm, tube size 8000mm lg. x 20mm od x 2mm thk. I am worried about distortion to the bundle, if the whole bundle is heat treated. For repair, How can we...
  3. AndyVictor

    Welding on impact tested (PWHT) vessel without PWHT

    Hi!! I want to weld a non pressure part (thickness 10mm) to an impact tested vessel of thickness 60mm (P1G2)in service having originally undergone PWHT. Can I weld it without PWHT. What sort of procedure qualification will be required for this. Regards
  4. AndyVictor

    Range qualified for heat input

    We find almost detailed (although, sometimes confusing) explanation on the range of base metal thickness, weld thickness etc qualified for a specific PQR. Is there any reference in Sec IX or else where, as to the exact range of values qualified with respect to Heat input and electric...
  5. AndyVictor

    Passivation of SS

    Is passivation and pickling mandatory for SS pipe lines. What are the common (easy to follow) practices followed in industry for passivation inside pipe lines. Thanks
  6. AndyVictor

    doing PWHT on material not requiring it by code

    Hi, greetings! Is there any problem if WPS requiring PWHT (say 2hrs @720degC) is used for metal of lesser thickness(say 8mm -not rquiring PWHT)for P4 material. Is there any requirement of minimum value of hardness -will long pwht on small thckness affect its UTS or any other property. Thanks

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