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  1. ianmontes

    TIME INTERVAL BETWEEN DHT AND PWHT

    Dear Sirs, We welded a 15E Pipe material (16 inch - 87mm thickness). Our procedure will be preheated with 205 deg centigrade then welding and will be ( hydrogen ) bakeout 310 deg Centigrade and perform PAUT, If accepted in PAUT, immediately followed by PWHT and will perform MT. Process is B31.1...
  2. ianmontes

    TACKWELD LOCATION

    Dear Sirs, We are about to weld a 15E Material (pipe-elbow - diameter 16 inch/thickness 87mm) and we tack a small piece with the same material, just above the groove of the base metal. My question is, did we do a right location of the tack weld? if not, where is the proper location of a...
  3. ianmontes

    slip on flanges

    Dear Sirs, What type of welds on slip - on flanges, socket weld or fillet weld? What is the difference? Need your advise. Thank you
  4. ianmontes

    CUTTING DISC TO BE USED IN P91

    Dear Sirs, What kind of cutting disc to be used for the pipe (15E material)? If we used cutting disc for carbon steel, does it affect 15E material? Need your advise. Thank you.
  5. ianmontes

    CODE TO BE USED

    Thank you very much for your suggestions.
  6. ianmontes

    CODE TO BE USED

    Dear Gents, We are constructing a coal-fired power plant, I was assigned for the coal silo/bunker fabrication area and i noticed that the Vendor Drawings for construction did not specify on what code should be used. Should this be under AWS D1.1? Need your advise. Thank you
  7. ianmontes

    AMPERAGE

    Dear Gents, Since I am new in welding, could you please teach me on how to measure amperage of welding machine and is there any acceptance criteria in checking on it. Thanks

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