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  1. TheYoungOne

    ASME B31.3 Branch Connection through weld

    Pipe is SA312-TP316L, Line size is 6" Sch. 40, Branch is 1" Thread-o-let A182-F316L 3M. Service I am not to sure of as this is another PM's project. We didn't design the system, customer had a third party engineering service. Personally no, I wouldn't see this as a problem but my strength is...
  2. TheYoungOne

    ASME B31.3 Branch Connection through weld

    We are getting ready to install some o-lets on a piping run per customers drawing. One of the o-lets is located in the center of a circumferential butt-weld. The butt weld has been 100% radiographed prior to the o-let installation. A co-worked asked if this was allowed by B31.3? I've looked...
  3. TheYoungOne

    Peaking, Butt Cheeking of Longitudinal Seams

    Pressure is 25 PSIG @ 300°F, FV Rating. Vessel will be packed with activated carbon and have petroleum vapors passing through it. OD is 132", Wall thickness is 5/8" Nominal. Peaks in about 1/4". No the vessel is not in cyclic service.
  4. TheYoungOne

    Peaking, Butt Cheeking of Longitudinal Seams

    We recently had some long seams welded and once they were complete, the seams were peaking in toward the ID of the Tank. We try and limit this as best as we can by 50/50 welding from both sides and utilizing key plates to limit distortion. Welder had trouble on these particular seams when...
  5. TheYoungOne

    QW-401.3 Supplementary Essential Variable

    I may have answered this question my self upon further review but would ask that someone second my interpretation before using it for our justification. If you refer to QW-251.2 Essential variables for Welding Procedure Specifications it reads: "Essential Variables. Essential variables are...
  6. TheYoungOne

    QW-401.3 Supplementary Essential Variable

    **QW 256 Table for Gas Tungsten-Arc Welding shows this as an Supplementary Essential Variable. QW-404.12 gives further definition.**
  7. TheYoungOne

    QW-401.3 Supplementary Essential Variable

    Good Evening All, A customer of ours requested we supply WPQR/WPS for a project we ere getting ready to start. Pressure vessels are 316L welded with 316L Filler. Our WPQR was qualified on 304L with 304L Filler. We have a 316L WPS showing the different classification of the filler metal and...

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