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  1. Sajjad2164

    ASME VIII-1 Nozzle Spacing Clash

    I'm designing a vertical distribution tank under ASME Section VIII, Division 1, and encountered UG-42 clashes in PV Elite due to tightly spaced outlet nozzles (see attached image). PV Elite flags several “Diameter Limit Clashes”, where the centerline distance between nozzles (e.g., N7 & N8 ~546...
  2. Sajjad2164

    Hello friends! In the 2023 edition

    Hello friends! In the 2023 edition of ASME Section III, Division 1, Subsection NB, it is stipulated that stress analysis shall adhere to the requirements outlined in Appendix XIII (part of the Section III appendices). Within this appendix, Figure XIII-2100-1 provides the stress classification...
  3. Sajjad2164

    Hello, guys! I have a question abo

    Thanks I'll check it surely.
  4. Sajjad2164

    Hello, guys! I have a question abo

    Hello, guys! I have a question about buckling analysis in ASME SEC VIII DIV.2 5.4 (PROTECTION AGAINST COLLAPSE FROM BUCKLING). The mentioned article says that the load combinations should be applied as per Table 5.3. I studied the example in ASME Section VIII - Division 2 Example Problem Manual...
  5. Sajjad2164

    Hello, friends! I'd like to know h

    Hello, friends! I'd like to know how the Nozzle Pro software isolates the primary membrane local stress contour as the one I've attached to the post. Is there any way I can extract the same contour in the software like Abaqus?
  6. Sajjad2164

    Lumped mass model

    Thanks! The best answer to why this method is used is that if you use even shell elements, you will encounter a huge model, which is time-consuming and computationally heavy to be solved with even workstation units. This is a solution to solve the problem with ordinary computers.
  7. Sajjad2164

    Lumped mass model

    Thank you all! Let me explain what I mean by a lumped mass model of the pressure vessel and its surrounding structures. Please look at the attached article; you will notice that the structures are equivalent, with some beam-column elements and several mass points. I want to learn how these mass...
  8. Sajjad2164

    Lumped mass model

    I would like to get information about the equivalent or stick mass model (lumped mass model). I would like to know what this method is based on. I want to represent a big pressure vessel and its surrounding structures as beam-column elements and investigate the structure's response to seismic...
  9. Sajjad2164

    Hello friends, I have reached an ar

    Thanks. First, I assume a value for surface temperature and then use a loop that corrects the amount of Tcs each time. I will report a summary of the calculation process here.
  10. Sajjad2164

    Hello friends, I have reached an ar

    Friend, I do what is true. I think struggling to know about an issue is within the forum's rules, and that's why a forum is held.
  11. Sajjad2164

    Hello friends, I have reached an ar

    decoding not codifying
  12. Sajjad2164

    Hello friends, I have reached an ar

    I am asked to codify the previous calculation of the company. Therefore there is nothing to be worried about. Our company will get a proper consultant for designing process, but someone in the company should be familiar with the design process, which is what I am doing here. Why are you writing...
  13. Sajjad2164

    Hello friends, I have reached an ar

    Take it easy! We had been designing indirect heaters several years ago, and some calculations of those designs are left. The problem is that the people who created those designs are retired, so we need someone to go to for the issues we encounter during the design process. Another problem is...
  14. Sajjad2164

    Hello friends, I have reached an ar

    Thanks The fire tube consists of two parts. The first part has a 1.1 m diameter and the return tubes (or clusters) with 273 mm diameter. I used simple heat transfer equations to calculate the heat flux over the first part. I divided the first part into three segments, and the total heat flux...
  15. Sajjad2164

    Hello friends, I have reached an ar

    Thanks The length of the coils (tubes) is almost 10 m. The coils pass 12 times through the vessel. The temperature of the crude oil passing through the coil is supposed to be from 20 to 40 degrees centigrade. We are a vendor ourselves.
  16. Sajjad2164

    Hello friends, I have reached an ar

    Hello friends, I have reached an arrangement consisting of two furnaces and thirteen return fire tubes. The general duty of the heater is 10 MW. The heater follows a natural draft circulation. I want to put four burners into each furnace to gain the task. Is it possible?
  17. Sajjad2164

    Indirect fired heater - Mass flow rate of fuel

    Hello folks! I have been working on another project and couldn't come here and continue the discussion. Now, I have reached an arrangement consisting of two furnaces and thirteen return fire tubes. The general duty of the heater is 10 MW. The heater follows a natural draft circulation. I want to...
  18. Sajjad2164

    Hello! There are two types of lift

    Thanks The free body diagram for the lifting process is the same as following. There is no spreder beam.
  19. Sajjad2164

    Hello! There are two types of lift

    Hello! There are two types of lifting lug orientation in PV-elite, which are flat and perpendicular. We have a particular type of lifting lug in a standard drawing, and I am confused about its orientation. The difficulties arose when I was about to put the amount of off parameter in the lifting...
  20. Sajjad2164

    Indirect fired heater - Mass flow rate of fuel

    Another question is how the dewpoint of fuel should be calculated. I found the following document. Is there any other resource for calculating the dewpoint of a fuel? https://files.engineering.com/getfile.aspx?folder=20dedca3-b63f-4c73-a21d-009298b2f62f&file=nbsscientificpaper500vol20p47_A2b.pdf

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