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  • Users: Soave
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  1. Soave

    DESIGN BOLT LOAD FOR FLANGED JOINT - ASME VIII DIV.2 PART 5

    Dear All, I'm trying to evaluate a method to design rectangular flange "according" to ASME PCC-1 and ASME VIII Div.2 What value should I use for pre-load the bolts in Service Criteria and Global Criteria for Elastic-Plastic Stress Analysis ? I'm trying: W = max(Wo;Wgs) Wb = 1.5W (bolt...
  2. Soave

    LRFD - ELASTIC–PLASTIC ANALYSIS FOR BOLTED JOINT

    Another concept applied to BFJ is Service Criteria. I suppose If I apply factor on pre-tension I will satisfy the Global and Local Criteria (In cases that bolts do not go over ultimate). But I think that the service criteria may not have a satisfactory (consistent) results, like flange rotation...
  3. Soave

    LRFD - ELASTIC–PLASTIC ANALYSIS FOR BOLTED JOINT

    Dear All I'm here again with other question about Elastic-Plastic Analysis. How should I apply LRFD concepts to bolt pretension for an analysis of bolted joint? Since I will apply the required factored loads to internal pressure... I think I will apply the same factored loads (for internal...
  4. Soave

    Material Properties in Inelastic Region

    Take a look at ASME VIII Divison 2 Annex 3.D.
  5. Soave

    Tangent Modulus Elastic-Plastic Method ASME VIII Div.2

    Thank you Victor and TGS4 @TGS4 I was thinking of bi-linear to minimize the computing time. But I will continue with the full curve Best regards
  6. Soave

    Tangent Modulus Elastic-Plastic Method ASME VIII Div.2

    Dear All I am running an elastic-plastic analysis for a pressure vessel according to ASME VIII Div.2 - item 5.2.4 and I pretend to use a bilinear material model. But I am in troubling about the value of the Tangent Modulus that I should use. I plotted the stressxstrain curve of the SA-516 70...
  7. Soave

    Section VIII, Division 2, Part 4.5.17

    Dear Have you read ASME VIII Div.1 Mandatory Appendix 1 - item 1.7 LARGE OPENINGS IN CYLINDRICAL AND CONICAL SHELLS?
  8. Soave

    ASME BPV VIII-1/VIII-2 - External Loads on Standard Flanges - An Update

    Thanks TGS4
  9. Soave

    Pressure vessel for a FPSO and ASME VIII Div.1

    Thank you RaymondN, We are considering all requirements for offshore installation.
  10. Soave

    FLANGE ROTATION CALCULATION

    Thank you all!!
  11. Soave

    FLANGE ROTATION CALCULATION

    Dear All I'm engaged in a study about bolted flange joint and I need find the flange rotation. Someone knows how I can find the rotation by an analytical calculation? (book, code, article...) At moment I'm using just FEA. Thanks in advance
  12. Soave

    Pressure vessel for a FPSO and ASME VIII Div.1

    Tigny, Thank you! I will check some FPSO regulations
  13. Soave

    Parallel Tangential nozzles through the knuckle

    inammanj123 I guess not, since we can not model a tangentinal nozzle attached to head. (I just tried to model, but I didn't get it)
  14. Soave

    Parallel Tangential nozzles through the knuckle

    As TGS4 replied, you need FEA. Since the WRC 107/297 does not find the actual stress values for your case.
  15. Soave

    Pressure vessel for a FPSO and ASME VIII Div.1

    Thank you for your reply SntMan
  16. Soave

    Pressure vessel for a FPSO and ASME VIII Div.1

    I have some doubt beucause in ASME VIII Div. 1 and Div.2 state: item 2 of U-1 in ASME VIII Div. 1 states: "...the following classes of vessels are not included in the scope of this Division.....(-a) those within the scope of other Sections" And in ASME VIII Div. 2 item 1.2.1.2 states: "Rules...
  17. Soave

    Pressure vessel for a FPSO and ASME VIII Div.1

    Dear All I have a question about the scope of ASME VIII Div. 1: Is included in ASME VIII Div.1 scope a pressure vessel design for operate in a FPSO (floating production storage and offloading)?
  18. Soave

    NR13 Pressure Vessel Code

    DDellmore, Yes, two separate calculations: 1st: If NR-13 shall be applied to your vessel. Item 13.2.1 b) P (kPa) x V (m³), if this product is greater than 8 (kPa.m³), so NR-13 shall be applied 2nd: What is the potencial risk group of your vessel? to classify the vessel you need found the...
  19. Soave

    PREX & TGS4 - Could you both please help with some Stress Linearization?

    ksbhatt Sorry for confusion. That spreadsheet does not refer to ANSYS calculation above (it was used to other vessel). Please, check with any your ANSYS calculation. And as explained by TGS4, the intermediate bending stress values is just calculated by y=mx+b (My spreadsheet dos not consider...
  20. Soave

    PREX & TGS4 - Could you both please help with some Stress Linearization?

    Hi ksbhatt I calculated acc. formula (5-A.2) and described in 5-A.4.1.2(c). The spread sheet is attached. (you can also see peak calculation in this sheet). http://files.engineering.com/getfile.aspx?folder=18cecd49-8870-4e0c-aa08-92e4253efd5e&file=linearização_modelo_2.xls

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