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  • Users: rvivac
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  1. rvivac

    Welding Simulation on ANSYS - Coupling Transient-Thermal with Static- or Transient-Structural

    Hello Folks! I am just want to know how to correctly apply the ANSYS Transient-Thermal analysis with a Structural analysis in order to perform a complete welding simulation and visualise the final distortion and residual stress field. I have done some thermal simulations with appropriate...
  2. rvivac

    The use of 17-4PH Stainless Steel in Ball Valves

    Hello all! I have a series of specs which asks for the use of the 17-4 H1150 Precipitation Hardening Stainless Steels in the stem and trunnion of ball valves. Until now, what I know is that this is a very good material for corrosion and high yield and tensile stress. The use is in the entry...
  3. rvivac

    Welding Engineering Monography Theme

    Hello folks! I am taking an specialization on Welding Engineering and I need to do a final monography. I tried to take a look on good tremes for the Oil and Gas Industry on Welding Magazines but could not get a good view on which Theme could be good and interesting to decide. Could someone...
  4. rvivac

    Stainless Steel piping and machine achoring - What kind of bolt is better?

    Hello all! Is there any specific criteria (temperature, material, etc.) to use coated carbon steel bolts instead of alloy steel bolts in stainless steel piping or machine anchoring?
  5. rvivac

    Adaptation of ASME PTC 19.3 (2010) to other types of Pipe-intrusions û The vibrational part

    Hello all! I have an interesting issue here about the interaction between mechanical engineering and instrumentation engineering. It came to my hands the ASME PTC 19.3 (2010) which scope is just about designing thermowells against resonance and fatigue. It is a really interesting norm that...
  6. rvivac

    Considering Radiation from a Stream to a Pipe Wall

    Hi There, The problem is: I have a duct carrying a high temperature stream. I have modeled the problem this way: I was asking my self if, inside the pipe where there is a 515°C hot air stream, radiation occurs together with the forced convecction. Thanks
  7. rvivac

    API 560 Code Issue - Use of carbon steel with high temperatures above 425¦C

    I have a carbon steel (CS) use at high temperatures issue here . We are just finishing the construction of a Reformer Furnace for a Hydrogen Generating Unit. The designer / supplier used ASTM A36 on an expansion joint on a breeching duct that is subjected to a 515°C stream. It is fact that the...
  8. rvivac

    threaded joints for pipes and valves

    I work for a big Oil & Gas firm that prohibits the use of threaded joints for pipes carrying flammable fluids (gasoline, diesel, naphtha, natural gas, LPG or whatever) subjected to any pressure or any temperature. For example, when we acquire a machine, we have to make them seal all the...

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