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  • Users: Shofa
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  1. Shofa

    What is the correct way to display the material specifications?

    KevinNZ Why you specify thickness and SCH. Only one data is enough and it is preferred to the SCH
  2. Shofa

    Dollar Plate

    I agree with ukinam. Using locally thick inset plate for heavy wall vessels may create more local stress coming from thermal cyclic conditions due to the thermal differential between the materials. Also, using integral nozzles in accordance with UW-16.1 (f1-4) is required in case the...
  3. Shofa

    pressure vessel saddle supports at angle

    If you use software like PVElite or Compress, both of it will perform the required calculations for saddles.
  4. Shofa

    Dollar Plate

    Ukinam, You could referee to ASME VIII DIV 1, Para UW-16C. The last paragraph is saying, "If additional reinforcement is required, it shall be provided as integral reinforcement as described in (1) below, or by the addition of separate reinforcement elements (plates) attached by welding as...
  5. Shofa

    Dollar Plate

    As mentioned above the insert plate shall be used for reinforcing the nozzle for thin vessels and the thickness of the plate shall be thicker than the actual vessel thickness. The inset nozzles or self-reinforcement nozzles shall be used for thick vessels (more than 2"), especially if it is...
  6. Shofa

    A36 for Membrane Wall of Boiler

    metengr; Regarding using SA36 for ASME I equipment, i noticed that in thread No. 154527, your reply was as the following:- Question 2Quote: Can it it be used as metal backing on welds for pressure parts? in a Sec I Fired or unfired? Reply; No. If you review PW-5.1 of Section I, Part UW, it...
  7. Shofa

    A36 for Membrane Wall of Boiler

    Thanks for your feedback.
  8. Shofa

    A36 for Membrane Wall of Boiler

    Gents, Is SA 36 could be using for membrane wall between tubes for boilers ?! If not, why and what is the recommend material to be using. Sincerely, Shofa
  9. Shofa

    Swaged Tubes in Boiler

    metengr, I really appreciate your support and prompt action. Thank you and best regards.
  10. Shofa

    Swaged Tubes in Boiler

    Thank you for your helpful. What about connecting furnace tubes to terminal tubes already on the drum by swaging.
  11. Shofa

    Swaged Tubes in Boiler

    Thank you metengr for your input. My enquiry regarding the roll/expanded tubes into the drum. My concern is the stress concentration due the change in the tube diameter and the local stress load . Also, ASME I is not referring to swaged connection in PWT-11.
  12. Shofa

    Swaged Tubes in Boiler

    Dear Expertise, We are in final process to order a water tube boiler with 125 T/h capacity. The vendor is insisting to use swaged tubes for the connection between the tubes and mud drum. Our specifications is not allowing for that. Can you please tell me the advantage and disadvantage to use...
  13. Shofa

    ASME U-Stamp

    The U Stamp means that the equipment is design, fabricated, inspected and tested in accordance with ASME VIII DIV 1 requirements. Also, the material should be in accordance with ASME SECTION II. Regards,
  14. Shofa

    relationship between design and operating conditions

    Theoretically, new system can work safely under the design conditions. However, risk will be there due to any increase in the boundary conditions coming from fluctuations from the norm. For existing system, you have to rerate it before applying the design conditions.
  15. Shofa

    ATM tank design-Corrosives

    As Isthill said, ASME SECTION VIII, DIV. 1 Rules for Construction Of Prressure Vessels Can Be Used For Your Case.
  16. Shofa

    Cathodic Protection for storage tank bottom

    Could you please tell me which better and why: a- Using CS for the bottom of CS storage tank with CP. OR B- Use SS for the bottom of CS storage tank without CP. regards,
  17. Shofa

    Nozzle Reinforcement to counteract Pipe Loads

    Mroakshott, I really support DSB123, The shell flexibility of the vessel should be included in the pipe stress analysis. However, the best solution for your problem is to reduce the nozzle loading by implement some modification on the piping system itself not to increase the shell /...
  18. Shofa

    ASCE 7-2002

    Ss and Sl are EarthQuake Parameters These factors are for short and long periods (0.2 and 1.0). These tables are found on pgs. 100 - 117 (ASCE 98)publication. R is Response Modification Factor Enter the value from table 9.5.2.2 (ASCE) as required. R is usually equal to 2.5 for inverted...
  19. Shofa

    Hormonic Piping Vibration

    Thanks a lot for the help. Regards,
  20. Shofa

    Hormonic Piping Vibration

    Hi everybody, I am using Caesar II to solve a piping vibration problem in one of our petrochemical plant. The problem consists of a piping system for chiller water is vibrating due to an external harmonic frequency at 11, 22 and 33 Hz. The max displacement occurs at 11 Hz. The main problem for...

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