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Recent content by VDK44

  1. VDK44

    Reinforcement of flat heads

    During one of my interactions with ASME code committee, I was informed that ASME Section VIII div 1 permits the use of stiffeners in the design of flat circular heads, bolted covers or flanges. The requirements of U-2g are to be satisfied. V.Dwaraka Krishna.
  2. VDK44

    Code Violations

    Dear esce/associates, Rectangular bolted and gasketed flanges together with mating Covers are often used for Header Boxes of Air Cooled Heat Exchangers designed to ASME and API Codes. However the design rules of rectangular flange are presently not covered by ASME codes. If you want this to...
  3. VDK44

    saddle for a vessel

    Dear Heyner, I am interested to have your spread sheet for pressure vessel saddle design. Kindly send to my E-mail v.dwarakakrishna@idpeltd.com Regards V.Dwaraka Krishna
  4. VDK44

    Bellows expansion joint design VS ASME

    Yes you are right. If you are looking for thin wall bellows design then follow EJMA. Such bellows are normally used in piping. For bellows used in Heat Exchangers you can follow TEMA or ASME.These are termed as Axial Expansion Joints. Regards, V.Dwaraka Krishna. dwarakakrishna@sify.com
  5. VDK44

    Bellows expansion joint design VS ASME

    Yews you are right. If you are looking for thin wall bellows design then it is EJMA. Such bellows are normally used in piping. For bellows osed in Heat exchangers you can folloe TEMA or ASME.These are termed as expansion joints. Regards, V.Dwaraka Krishna. dwarakakrishna@sify.com
  6. VDK44

    air cooler header

    If it is of a hollow rectangular shape with round corners, you can calculate it as per ASME Sec VIII div 1 Appendix 13, where detailed rules are available as also worked out examples. If you provide me with design details I can size the header for you. sincerely yours, V.Dwaraka Krishna...
  7. VDK44

    design of oval shape(non-circular) horizontal tanks/bunkers

    Dear John, Please provide me with pdf of non circular vessel design to dwarakakrishna@sify.com Regards, V.Dwaraka Krishna.
  8. VDK44

    rectangular flanges

    You can design the bolted rectangular unstayed flat cover as used for cover plate type header boxes of Air Cooled Heat Exchangers as per ASME Sec VIII Div 1 UG 34 rules usinfg formula (5). Bolt load W to be computed correctly for rectangular configuration taking the guide lines from Appendix 2...
  9. VDK44

    pressure vessel code VIII

    Dear Babyyoda, The vessels with the conditions you describe do not fall under the purview of ASME SECTION VIII Div 1. But still they are pressure vessels. If you have to design such low pressure vessels as per ASME Code then you must adopt the design pressure with in the purview of the code...
  10. VDK44

    avoiding pwht on thick materials.

    Dear RSAUK, It is a very good question of a practical background. You can apply a 13 mm buttering of INCONEL weld overlay on the bevels of both the nozzle as well as the shell and then weld the connection with inconel welding. This is a costly proposition, but technicalyy very sound and does not...
  11. VDK44

    Air cooler header sizing

    Dear Mr. Juanq, I am awaiting your Email details for sending guide lines on header sizing. Regards, V.Dwarakakrishna.
  12. VDK44

    Air cooler header sizing

    Mr. Juanq, Sorry for my long silience. I have developed certain guidelines with sketch for sizing the header based on various parameters. Please give me your E-mail so that I can send it to you for your guidance. Rgards, V.Dwarakakrishna. E-mail; dwarakakrishna @sify.com
  13. VDK44

    Non-circular Flange Design

    You may please refer to HEI standards for rectangular flange design. V.Dwarakakrishna.
  14. VDK44

    Where to get Copies of Material Specifications Online?

    Please visit http://www.key-to-steel.com where you get lot of information on steels. This is a very good site to the best of my knowledge.
  15. VDK44

    Bellows EJ spring rate

    Please refer to EJMA standard for good details on the subject.
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