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  • Users: MQM90
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  1. MQM90

    Piping Stress Analysis - Coil Arrangement

    Hi, I am being expected to do piping stress analysis of inlet and outlet header which is basically a coil consisting of various tubes connected to individual inlet and outlet headers. Headers are capped at one end, i.e. closed and at the other there are typical tubes configuration like in any...
  2. MQM90

    Difference between below material

    Point wise reply is as follows Thankyou for answering me. 1. No i m not sure that sagging is caused by creep or not ? 2. 30 years - service life 3. the sagging is overall Please continue Osama Nusrat Ali
  3. MQM90

    Difference between below material

    Can i know the difference from point of view of thermal expansion & the role of different compositions. Basically we are checking our exsiting superheater for new superior materials. In general i know for higher grades the thermal conductivity decreases and the elasticity gets better(due to...
  4. MQM90

    Expansion Joint Design

    Thankyou SnTMan. Osama Nusrat Ali
  5. MQM90

    Expansion Joint Design

    Dear SnTMan Ok i am getting the concept now. Conclusion of YOUR emails are: 1. F&F JOINT is good to accomodate very small amounts of movement and if stresses of tubes and tube-ts JOINT are acceptable provided dimensions and spring rate are inputted correctly. "This is also clear that when i...
  6. MQM90

    Expansion Joint Design

    Dear SnTMan, You wrote "A good general rule of thumb is that if you don't really need an expansion joint, a F&F will work just fine" But here you meant that a good general rule of thumb is "where someone really need an expansion joint, a F&F will work just fine". I think don't is a mistake...
  7. MQM90

    Expansion Joint Design

    I want to understand that in such component designing what are general recommendations i.e. a) Cycles to be used in analysis - Any general IDEA b) Flange and Flued joint design thickness limitations ? c) Thin walled joint design thickness limitations ? d) Which type of expansion joints are...
  8. MQM90

    Thick Flange Flued Design

    I want to understand that in such component designing what are general recommendations for following conditions? a) Cycles to be used in analysis b) Flange and Flued joint design thickness limitations c) Thin walled joint design thickness limitations d) Which type of expansion joints are...
  9. MQM90

    Thick Flange Flued Design

    Ok Thanks BigInch Osama Nusrat Ali
  10. MQM90

    Increasing Compressor Balancing Line Size

    Thankyou pmover. This was a great help atleast i am sure that the requirements related to line sizes to be sorted with compressor mfg. pmover, i want to confirm do you have some experience that centrifugal compressor of multistage type, is checked for all its intermediate nozzle connections or...
  11. MQM90

    Thick Flange Flued Design

    Hah !! No BigInch, there is another work assignment. This exchanger is an existing installed exchanger at the Plant. My client needs to modify the material of the tubebundle from CS to SS and the material of expansion joint from SS 240 304 to SS 240 316. When i performed the analysis, the...
  12. MQM90

    Thick Flange Flued Design

    1. My Heat Exchanger Software uses the formulas in TEMA RCB-8 to determine the value of the stresses for Expansion Joint design check. 2. And in same software check allowable stresses per ASME Section VIII, Div 1, Appendix 5. My Question: The software include checks for some but not all TEMA...
  13. MQM90

    Increasing Compressor Balancing Line Size

    Thankyou very much pmover. Can i confirm one more thing. My compressor manufacturer is not very cooperative, but i am trying to check that a 6 inches balancing line can solve their issues or not ? My process guys have accept the line size and have their concerns. I have also checked its...
  14. MQM90

    Increasing Compressor Balancing Line Size

    Waiting for somebody to rule out my issues? Osama Nusrat Ali
  15. MQM90

    Increasing Compressor Balancing Line Size

    Hi BigInch, My compressor is centrifugal and there are existing weight type supports installed. According to your reply it seems the centrifugal compressor lines shouldnt encourage for supports. So should i check my piping without supports ? Moreover it is my idea that a balancing line shouldnt...
  16. MQM90

    Increasing Compressor Balancing Line Size

    Hi BigInch I meant any experience as follows: 1. Common sizes for balancing lines ? 2. Recommended support type for balancing lines or no supports are recommended on balancing lines ? 3. Type of weld connection not be used ? 4. Any additional thing that is to be avoided ? Osama Nusrat Ali
  17. MQM90

    Nozzle loadings exceeding exchanger inlet nozzle

    Special Thanks to SNORGY & BigInch & 4Pipes Osama Nusrat Ali
  18. MQM90

    Increasing Compressor Balancing Line Size

    Dear All, I am confused that if a compressor balancing line size is changed and modified from 3 inches to 6 inches what more I can check after performing the stress / flexibility analysis. I was thinking regarding the process checks like high velocities and pressure drop, but these have...
  19. MQM90

    Loads on suction nozzle conn. & combined resultants per NEMA fails

    Thankyou SNORGY You are great !!! Graphite pads is final but i am interested to know that rolling supports though give minimum friciton of coefficient i.e. steel balls to steel rails 0.005 but is not a very good idea as the pipe friction forces are tremendously reduced which finally makes the...
  20. MQM90

    Nozzle loadings exceeding exchanger inlet nozzle

    Thanks To All Nice discussions. Take Care Osama Nusrat Ali

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