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Recent content by rww88

  1. rww88

    External Nozzle Loads TEMA Standards RGP-RCB-10.7

    The 9th edition of the Standards of the TEMA recommended good practice section of Section 5 Mechanical Standards TEMA Class RCB (RCB-10.7 Design of Large Diameter Ratio Shell Intersections Subjected to Pressure and External Loadings) offers stress equations based on the Pressure Vessel Research...
  2. rww88

    PVP 1279 confusion

    The plot thickens: Numerous discrepancies exist between the correlation equations appearing in the PVP 1279 graphs and those tabulated in the paper for the same parameter.
  3. rww88

    PVP 1279 confusion

    Thank you JStephen for the quick response. I guess we will never know what size repads the authors of PVP2002-1279 used in their FEA models. Upon further reading of the paper, my confusion only grows. The sample problem in PVP2002-1279 states that the example nozzle qualifies as a "regular"...
  4. rww88

    PVP 1279 confusion

    PVP2002-1279 "Stiffness Coefficients for Nozzles in API 650 Tanks" (published in 2002) makes the following statement regarding the FEA model for which it is based: "Nozzles were chosen to have reinforcing pads with equivalent dimensions of Table 3-6 column 5 of API 650." Older editions of API...
  5. rww88

    API 650 material groups

    Geoff13 would you be interested in conducting peer-reviews of originally authored engineering topics concerning storage tanks? If so, what would be the best way for us to converse?
  6. rww88

    API 650 Thickness Reinforcement Plate for Nozzles

    JStephen thank you for the extensive post that certainly generates much food for thought. During my research I have noted that many of the topics that you brought forth are not addressed by even the most popular books on the subject. I am going to take your points under consideration when...
  7. rww88

    API 650 material groups

    Thanks Geoff13.
  8. rww88

    API 650 Thickness Reinforcement Plate for Nozzles

    Great comments guys! Thanks so much Geoff13 for your comprehensive response. I must emphatically repeat a previous comment: The value of peer review is priceless.
  9. rww88

    API 650 material groups

    Finally the answer: The API Standard 650 material groups are differentiated by the average values of longitudinal and transverse notch toughness impact values.
  10. rww88

    API Standard 650 material groups

    Finally the answer: The API Standard 650 material groups are differentiated by the average values of longitudinal and transverse notch toughness impact values.
  11. rww88

    API Standard 650 material groups

    Thank you for your response. To clarify, from the Standard regarding flush-type cleanout fittings: "When the shell material is Group I, II, III, or IIIA, the width or height of the clear opening shall not exceed 1200 mm (48 in); when the shell material is Group IV, IVA, V, or VI, the height...
  12. rww88

    API 650 Thickness Reinforcement Plate for Nozzles

    Thank you IFRs for your thoughtful response; you are exactly correct, the required amount of reinforcement should read (11)(1.375) = 15.125 in2. The value of peer-review is priceless. Can you offer any comments or considerations regarding my 20 Sep 18 query regarding API Standard 650 material...
  13. rww88

    API Standard 650 material groups

    I thought I would try my luck here in the Metal and Metallurgy engineering forum on this one. It has been five days without a single response since I posted this same question in the Storage Tank engineering forum where I surmised it to be more appropriate: What is the underlying factor or...
  14. rww88

    API 650 Thickness Reinforcement Plate for Nozzles

    The book is entitled Design and Analysis of Openings in Steel Tanks and Pressure Vessels. As the name states, the content is limited to penetrations in steel vessels but it does include large openings formed through conical reductions. Standards 620 and 650, ASME Section VIII Division 1, and to...
  15. rww88

    API 650 Thickness Reinforcement Plate for Nozzles

    Attachment corrected from previous posthttps://files.engineering.com/getfile.aspx?folder=5b1f9b3d-be3c-4d5d-a0f3-20db8656ca7a&file=Example_9_point_1_(corrected).pdf
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