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  1. b5quaj

    3S for secondary stress, Q

    1) In erection condtion, Can load acting shell be considered as secondry? 2) 3S is greater than Sy, Does it mean yield occurs? 3) What is self-limiting(or self-equilibrating for secondry? 4) What is gross distortion? 5) If yield occurs to deformation, why is it invisible? Thank you. your...
  2. b5quaj

    3S for secondary stress, Q

    When secondary membrance stress plus bending occurs, 3Sm may be used. In this case, 3S is greater than its yield stress. Does It means yield or deformation of shell. Secondary is self-limiting. I considered the load which are acting on shell to be attached lifting lug and tailing lug as...
  3. b5quaj

    Fixed tubesheet with hub welded to shell

    As an example, I determined fixed tubesheet thickness as per TEMA. And This tubesheet has hub to be welded to shell. But allowable stress of tubesheet is lower than allowable stress of shell. How should I determine hub thickness to be butt-welded to shell? by UG-27 or by shell thickness? Is...
  4. b5quaj

    Fixed tubesheet with hub welded to shell

    For fixed tubesheet with hub welded to shell(Refer to Fig. UW-13.3), If Allowable stress of tubesheet is lower than allowable stress of shell, Shall Hub end thickness be checked as per UG-27 consider hub as cylindrical shell Or May hub end thickness be equal to shell thickness? Please reply...
  5. b5quaj

    UG-36(a)(1)

    This para. shows "When the long dimension of opening exceeds twice the short dimentions, the additional reinforcement is required.". What does additional reinforcement mean?
  6. b5quaj

    RT efficiency ?

    i have a question about RT efficiency in preparing calculation sheet. 1) From datasheet, shell side is spot. In calculation, if you use seamless head and rolled plate for shell. what is E for shell? what is E for seamless head? So, What is the right one of RT-1, RT-2, RT-3 and RT-4 for stamping...
  7. b5quaj

    Impact test-codeware compress

    Before i use compress to prepare the strength calculation sheets in my company, i decided governing temperature using FIG UCS-66 curves. Compress for windows uses the MDMT reduction of FIG UCS-66 1 to decide the rated MDMT. Which one of FIG. UCS-66.1 and FIG. UCS-66 curves is good to establish...

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