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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

    Rounded Indication Acceptance Criteria

    Check the dimension of the largest R.I. first, to make sure that it is within tolerance before going through the extent of finding the worst 6" of weld. Make sure that the porosity is not "aligned", this will constitute another means of acceptance criteria. Also review the definition of...
  5. 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...
  6. 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.
  7. wagnermj

    Welding Electrode

    In regards to the welding electrodes, in order to save confusion at my site, I wanted to start ordering all E7018 electrodes with the "-1" designation to cover all circumstances where our temp requirements on carbon steel material may drop below -20F.(i.e. repair to prssure vessel shell rated to...
  8. wagnermj

    Welding Electrode

    I have found taquitos dripping grease..... once
  9. wagnermj

    Welding Electrode

    What I was trying to ask in regards to substitution of electrode was if the E7018-H4R (good to -20F) for welding P1 to P1 materials with 70ksi strength, could be welded using E7018-1 (good to -50F)with the same results.
  10. 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.)
  11. wagnermj

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

    Is there an ASME equivelent to A-108-1018
  12. 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.
  13. 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...
  14. 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.
  15. 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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