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  • Users: Naren
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  1. Naren

    Requirements Non USA Engineer to obtain a PE licence?

    What are the requirements for a non USA engineer to obtain a USA PE licence, whilst not residing in the USA. What state department or Professional body may be contacted for details? Regards Naren naren.sukaih@sapref.com Naren Sukaih naren.sukaih@sapref.com
  2. Naren

    Anyone checked out this book on Vibration?

    Gents, This in reply to Stressguys questions. The contents of the document are given below. It basically identifies your vibration mechanism, then provides some assesment criteria, without detailed analysis (eg stress) to check if you have a problem or not and then gives some guides to correct...
  3. Naren

    Any body got a good Pipe line class spec for Plastic pipes

    Has any body got a good Pipe line class spec for plastic pipes? Lines are typically used in water treatment facilities for acids, HCL, H2SO4, Caustic etc. Typical materials: HDPE, LDPE, uPVC, etc Require specification for: service: Pipes in different diameters, Valving, fittings flanges...
  4. Naren

    Design liquid eductor

    Maybe you have the info already, however the reference below is very useful: "Process Vacuum System Design and Opeartion", by James L Ryans & Daniel L Roper. Design is similar to steam jet ejectors, except a simple converging nozzle is used. Alternately contact a reliable...
  5. Naren

    Stress concentration factor

    I don't understand your geometry, however it sounds like you have a shaft with a shoulder fillet. Try the popular book " Stress concentration factors" by R E Peterson,under section 3 - Shoulder fillets.
  6. Naren

    Practicality of solution annealing heat treatment of Stainless steels?

    It is specified to do solution annealing heat treatment after welding of stainless steels & other nickel/chrome alloys. Often this is not practical if welding is done in the field (eg piping runs). This requirement is then waived? What guidelines are available concerning the above? When must it...
  7. Naren

    Guidelines required for Refinery piping vibration assessment

    Colleagues, I have not had time to respond to any of the discussion. I do apologise, however I did find it interesting & informative. I will appreciate a copy of the doucuments mentioned by "Vibration specialist"... refinery piping data & concentration factors. Other documents by...
  8. Naren

    Guidelines required for Refinery piping vibration assessment

    I have a an extensive task of assessing the severity of vibrating pipes in a refinery. I require practical guidelines & tools (software/ spread sheets, etc) to do this for the following areas. Quick screening methods. Risk classification?
  9. Naren

    Guidelines & methods required for Refinery piping vibration assessment

    I have a an extensive task of assessing the severity of vibrating pipes in a refinery.<br> <br> I require practical guidelines & tools (software/ spread sheets, etc) to do this for the following areas.<br> <br> Quick screening methods. Risk classification?<br> &quot;Shortcuts&quot; for natural...
  10. Naren

    What recommedation for tank coating for liquid sulphur

    I have to install a tank (12m dia.x 8m high) to hold moltem sulphur. Sulpur will be heated to 120 to 180deg. Corrosion of the floor has occurred in similar tanks before. I am considering Carbon steel with coating. What recommendations can be made. Alternates are Carbon steel, with...
  11. Naren

    Buckling of spheres

    Hi babe<br> <br> I forget to mention that most pressure vessel codes (ASME, BS, AD Merkblatter) have sections on external pressure.<br> <br> Other reference is Welding Research Council Bulletin WRC 406<br> & API 2U, Stability design of shells
  12. Naren

    Buckling of spheres

    Hi Babe<br> <br> I have the Timoshenko books, good but does not cover what you are looking for. Another book by Timoshenko is "Strength of materials", but covers buckling of tubes<br> <br> Roark' does have a table for buckling of a thin sphere under uniform pressure, table 35, case 22. I have...
  13. Naren

    aluminum corrosion leading to leaky valve?

    Frederick is correct about the galvanic cell created. The white coating is aluminium oxide. The lapping action is what actually removes it. It starts rebuilding itself. This is what gives it corrosion protection, similar to stainless steel passive layer. <br> The corrosion mechanism: the Al acts...
  14. Naren

    Cable stayed flare design

    Hi orama<br> I have just seen your posting. Hope this is not too late. This is an topic that also interests me from a mechanical point of view. I looked for similar information in the past, but have not found much. Most cover process design. The design is similar to design a tall tower for...

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