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  1. PVDEngg

    Determination of Pressure Stress Intensification Factor (SIF) for WRC-107/537 calculations

    Most of the available literature refers to VIII-2 Part 4.5 for SIF determination. But, I could not locate the exact information or relevant equation in Part 4.5, using which I could calculate SIF manually. Second reference is PVP-399. Which eventually boils down to VIII-1 Appex 1-10 till 2017...
  2. PVDEngg

    What is basis for establishing pressure ratings of ASME B16.5 standard flanges?

    Hello Gentlemen, According to the (B16.5) 1-21 interpretation, ratings in B16.5 are a result of theoretical analysis with due consideration for experience in application. It did not mention anything about flange ratings being established by 'proof tests' or 'bursting them and adding factor of...
  3. PVDEngg

    ASME BPVC Section VIII.2 Clause 4.3.12 Vs VIII.1 UG-32(g)

    Hello all, Conditions of applicability for using DIV.2 rules for design of toriconal sections 'paragraph 4.3.12.2' are listed in equations 4.3.63, 4.3.64 & 4.3.65. These conditions of applicability are specified in UG-32(g)in DIV.1, together for toriconical heads and sections. Is it coherent to...
  4. PVDEngg

    Difference in limit of half apex angle of conical sections in internal & external pressure design

    Hello all, as per VIII.1 Appendix 1-8 Clause (a) texts "The formulas of (b) and (c) below provide for the design of reinforcement, if needed, at the cone-to-cylinder junctions for reducer sections and conical heads where all the elements have a common axis and the half-apex angle 'alpha' ≤ 60...
  5. PVDEngg

    External Pressure Chart for SA-537 Thickness 64 mm and less

    Hello everyone! May I please have some clarity on following?? External pressure chart referred in Table-1A for SA-537 Gr.1 (t<=64mm) is CS-3. And somehow, there is separate Chart for SA-537 Gr.1 (t<=64mm)as CS-4. Can somebody educate me how and why so?
  6. PVDEngg

    Exact physical significance of Sec VIII Div.2 Annexure 5D

    Hello Gentlemen! May I know what is the appropriate significance of Sec VIII Div. 2 Annexure 5D? It is referred in para. 5.5.3.4, which talks about alternative for determining PEAK stresses around a nozzle opening instead of detailed stress analysis as per Para 5.5.3 FATIGUE ASSESSMENT – ELASTIC...

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