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...
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...
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
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...
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...
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.
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...
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.
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.
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...
