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Recent content by rinu

  1. rinu

    How shall I calculate cooling rate

    How shall I calculate cooling rate of steel during welding. I have maximum heat input for every pass of welding , welding speed, area of the welding portion and welding drawing. can any body help me to calculat the cooling rate of the steel after welding. thanks and regards Sudipta jana
  2. rinu

    PROBLEM OF COAL DUST ON Al AND GALVANISED STEEL ON MARINE ATMOSPHERE

    Dear all, We had a project in Portugal sea side for LNG terminal. Light coal from Indonesia is currently unloaded in Sines(Portugal) harbour. We were told by the client that this coal dust is aggressive specially for aluminium and galvanised steel. Does anybody know about risk of corrosion...
  3. rinu

    Different stresses of the buried pipe line

    We are using 40" cement lined pipe(inside) with 3 layer polyethylene coated (outside)pipe. The pipe is for water in take from sea and that water will used for heating purpose of LNG vaporiser. Now we did not install CP system for this buried pipe. According to NACE generally we consider 16...
  4. rinu

    Different stresses of the buried pipe line

    What are different stresses have to be considered in case of buried pipeline to calculat any leak or rupture for the corrosion.
  5. rinu

    problem of samples for smaller thickness

    We have selected the sample of CTOD test according to ASTM standard. Generally people (other studies) took 10mm thickness (w). If we take 4 mm (w) and make the specimens according to standards. What will be the effect. Because the sample thickness (minimum) has not been mentioned in ASTM E 1290...
  6. rinu

    slection of notch in CTOD and Charpy

    Dear all Could you please help me for sample selection of charpy and CTOD test in welded structure. How do I select sample for CTOD or charpy. Observing microstructure of HAZ or Hardness where we find some abnormality we will take sample from there. or there is some standard for different steel...
  7. rinu

    useing 304 upto -100C (minus)

    We want to use 304 in LPG condenser system the temperature is (-100 C) quite low. is there any problem using 304 at that lower temperature. I want some references to support that.
  8. rinu

    different phase of 9 Ni steel

    after welding what will be the microstructure? ferrite and pearlite ? martensite should not come ?
  9. rinu

    different phase of 9 Ni steel

    Dear all Do you have the information? What are the different phases present in 9% Ni steel.How it's microstructure will differ in Water quench, normalised and quenched & tempered heat treatment.
  10. rinu

    Corrosion inhibitors for products, gas transport pipelines

    VCIs are originaly developed to protect boilers and piping systems of ships to be mothballed, the volatile corrosion inhibitor(VCI)has been modified over the years to protect electronics, pacaged items,reinforced concrete, coated metaland mateal working fluids. VCIs are powerful tool in...
  11. rinu

    What is the effect of Ni containt

    What is the effect of Ni containt in steel in corrosion resistance at carbon dioxide atmosphere for low carbon dioxide partial pressure (0.1 bar). We have to select a material for condensate vapour return system and the composition of the vapour is having 15 mol% of carbon dioxide and 2 mol% of...
  12. rinu

    standard for cleaning descaling (p

    standard for cleaning descaling (pickling and passivation) of carbon and alloy steels. Alloy steel having specification ASTM A333 GRADE 3 AND ASTM A335 PRADE P5, P9 PICKLING AND PASSIVATION PROCEDURE AND STANDARD.
  13. rinu

    which alloy steel (composition) can

    which alloy steel (composition) can fully protect carbon di oxide (15mol% CO2 and 2mol% H2O)corrosion. Corrosion rate will be 0 mpy
  14. rinu

    Corrosion inhibitors for products, gas transport pipelines

    you may apply VCI volatile corrosion inhibitor. contact www.cortecvci.com
  15. rinu

    Which alloy steel (composition) can

    Which alloy steel (composition) can fully protect carbon di oxide corrosion (15 mol% CO2 and 2mol% H2O)in condensate pipe line system.
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