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  • Users: wagnermj
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  1. wagnermj

    External flange hub corrosion

    Is there a calculation or some type of guidance to determine acceptable flange hub remaining thickness after corrosion has occurred? I am experiencing crevice corrosion between mating flanges on the hubs of the flanges. Visually I am able to get approximate wall loss measurement but I cannot...
  2. wagnermj

    Welding question Root passes vs. time

    Does anyone see a drawback or issue with welding a root pass on small diameter pipe (<3") carbon steel pipe with base metal thicknesses < .250" and leaving overnight before returning to complete the weld ? Welding process is GTAW using ER70S-2 filler metal. Ambient temperature >80F...
  3. wagnermj

    Nut / stud corrosion

    Does anyone know of a standard / formula for determining corrosion allowance or Tmin of nuts or bolts based on # of bolts, pressures and temperatures ? Thank You
  4. wagnermj

    Tapping of Blind flanges

    I need to tap a 4" 300# RFBF with a 2.375" bore and prep the bore to allow for a full penetration weld for a 2" NPT diptube that will be installed through the flange. I have noticed that all of the "tapped" blind flanges that I have seen, have an extra portion of reinforcement on the opposite...
  5. wagnermj

    Nozzle Joint Design ASME Sec VIII Div 1

    Does anyone know where I can find acceptable joint designs for nozzle penetrations through flat heads (i.e. 1" nozzle to 10" 300# RFBF). I am not sure if UW-16 applies to this application.
  6. wagnermj

    Welding Electrode

    What is the difference between E7018-H4R electrode vs. E7018-1 ? Can the E7018-1 be substituted for E7018-H4R ? (note: they both have the same F No.)
  7. wagnermj

    Is A-108 grade 1018 round bar a recognized ma by ASME (SA designation)

    I was wondering if A-108 grade 1018 (round bar P-1 group 1)is a recognized material by ASME (SA designation). I plan to machine bar stock to make plugs for a repair to a heat exchanger, and the MTR that I received only shows an ASTM designation.
  8. wagnermj

    Preheat reuirements for fillet welds

    I have a scope of work to seal weld two plugs (3/4" dia tapered S/S 304) to an existing tube (SA-179 x .083") and tube sheet (SA516-70 x 1-1/8") using GTAW process and ER309L filler material. I plan to use a two-pass process to accomplish this work. My question is: Do I need to consider...
  9. wagnermj

    Acceptance Criteria Ductile Iron Valve Bodies

    I am in need of a standard(s) where I can find specific visual acceptance criteria for ductile iron valve bodies.
  10. wagnermj

    SA 215 WCB vs. SA-234 WPB

    Is there a major difference between SA-216-WCB (70 ksi) as opposed to SA-234-WPB(60 ksi) other than one is a casting and the other, a fitting ?

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