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  • Users: Salmet
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  1. Salmet

    Internal Pickling and Passivation of Super duplex stainless steel SA 790 UNS 32750

    Dear Members, In one of our desalination plant projects we are being advised to perform Internal Pickling and Passivation of Super duplex stainless steel SA 790 UNS 32750 pipe welding joints, for untreated sea water application. Is it really required internally? I will be thankful for your kind...
  2. Salmet

    Internal Pickling and Passivation of Super duplex stainless steel SA 790 UNS 32750 Pipes

    Dear Members, In one of our desalination plant projects we are being advised to perform Internal Pickling and Passivation of Super duplex stainless steel SA 790 UNS 32750 pipe welding joints, for untreated sea water application. Is it really required internally? I will be thankful for your kind...
  3. Salmet

    VICTAULIC COUPLINGS FOR SUPER DUPLEX PIPING SYSTEMS AT 65 BARS

    Dear Members, I am being asked to install Victaulic coupling joints at 6inches diameter super duplex stainless steel piping system for untreated sea water, in a Reverse Osmosis water treatment plant, operating at 65 BARS (943 Psi). Grooves are supposed to be machined on the piping components...
  4. Salmet

    QUALIFIED DISSIMILAR THICKNESS FOR Flat Olet to Blind Flange JOINT

    Dear Members, I have to weld an Flat Olet Class 3000, 1" diameter with a blind flange (Thickness at bevel toe = 11mm) with a blind flange having thickness 30.2mm, via GTAW via attached configuration pattern. My welding procedure is qualified to weld upto 12mm thickness. Does ASME IX allow us to...
  5. Salmet

    Corrosion in Duplex stainless steel pipes

    Dear Members, After 3 months of Untreated sea water service at ambient temperature, 65 Bar pressure, Radiographic testing of welded duplex stainless stainless UNS S32205 with ER2209 TIG filler wires, severe corrosion pits have been observed. Please refer to attached snaps of RT films. Please...
  6. Salmet

    CHEMICAL CLEANING AND FLUSHING OF PIPING SYSTEMS

    DEAR MEMBERS, One of our vendors for chemical cleaning of carbon steel piping systems (conforming to ASME B31.1), is proposing citric acid solution for this purpose. I will be thankful if any one can refer me an MS excel calculation sheet/calculations in order to confirm the efficient pressure...
  7. Salmet

    Heat Treatment of SS 420

    Dear Members, please suggest suitable heat treatment of stainless steel 420 grade we have been quenching and tempering it to achieve UTS in excess of 1300 Mom and need % elongation of 8... Results are never stable wrt to elongation while we consistently achieve its required hardness. Thanks in...
  8. Salmet

    Selection of suitable Material for sour service at low temperatures

    Dear Members, please suggest if some body has experienced the case for selection of suitable material with working temperature at minus 90 degree C for the transportation of a mixture of around 4 % H2S and 3.4 % CO2 gas. Thanks in advance
  9. Salmet

    SEISMIC LOADING IN STAAD PRO

    Dear Members, I need guidance to apply seismic load over an industrial truss in accordance with IBC 2006. Thanks in advance
  10. Salmet

    Welders Qualification Testing With Purging (ASME IX)

    Dear members, Why is a welder qualified with purging of inert gas, not allowed to weld without purging according to ASME IX QW-356 and QW 408.8? Despite practically, it is more difficult to weld with purging of inert gas than welding without purging. Thanks in advance.
  11. Salmet

    Hot and Cold working temperatures in ASME codes

    What range of temperatures does ASME VIII Div. 1 or ASME I mean when it uses hot working and cold working terms? Does it refer to the metallurgical definitions of cold and hot working?
  12. Salmet

    Intended temperature range of hot and cold working ASME VIII

    Dear Fellow Members! What range of temperatures does ASME VIII Div. 1 or ASME I mean when it uses hot working and cold working terms? Does it refer to the metallurgical definitions of cold and hot working? Thanks in advance.
  13. Salmet

    Radiography of Rectengular Butt joints in over head cranes as per AWS D1.1

    Dear Fellow Members! What does AWS D1.1 says about radiography of Rectengular Butt joints in over head cranes? Thanks in advance.
  14. Salmet

    Why is the lower thickness limited for Impact Tested Welding Procedures?

    Hi! Time and again I stuck to the question that: Why is the lower thickness limited for Impact Tested Welding Procedures?. Where as Metallurgically, increasing the thickness usually increases the chances of retained austenite/martensite, thereby decreasing fracture toughness/impact strength...
  15. Salmet

    BREAST SHOT WATER WHEEL RPM CALCULATIONS BASED ON RIVER VELOCITY AND WATER HEAD

    Hi Hydrologists! Need help in calculating Breast shot water wheel's R.P.M based on availablle water head (i.e. around 6 feet) and water flow rate (i.e. 14.3 cubic feet per second). Thanks in advance

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