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  • Users: Al1Al
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  1. Al1Al

    ASME B16.5 Class Ratings

    The flange classes were originally called pounds. Class 300 flanges were called 300-pound flanges, and so forth. This was because, originally, Class 300 flanges were rated for 300 pounds per square inch (psi) pressure at a benchmark temperature. Pound (lb) meant psi, and had nothing to do with...
  2. Al1Al

    Normal Upper Temperature - Piping Stress Analysis

    Is it right to calculate the stress range with the maximum operating temperature without adding a safety margin? (Appendix S)
  3. Al1Al

    Normal Upper Temperature - Piping Stress Analysis

    ASME B31.3. Interpretation: 7-04 Question : In accordance with ASME/ANSI B31.3, para. 302.3.5, should the basic allowable stress at maximum metal temperature Sh used for calculating the allowable displacement stress range,be for the normal upper temperature under operating conditions, and...
  4. Al1Al

    Normal Upper Temperature - Piping Stress Analysis

    In accordance with ASME B31.3, does the phrase “maximum metal temperature...for the thermal cycle under analysis” in para. 319.3.1(a) require the use the normal upper temperature under operating conditions, and include all short-time excursions above such normal operating temperature in...
  5. Al1Al

    Normal Upper Temperature - Piping Stress Analysis

    In accordance with ASME B31.3, does the phrase “maximum metal temperature...for the thermal cycle under analysis” in para. 319.3.1(a) require the use the normal upper temperature under operating conditions, and include all short-time excursions above such normal operating temperature in...
  6. Al1Al

    Normal Upper Temperature - Piping Stress Analysis

    In accordance with ASME B31.3, does the phrase “maximum metal temperature...for the thermal cycle under analysis” in para. 319.3.1(a) require the use the normal upper temperature under operating conditions, and exclude all short-time excursions above such normal operating temperature in...
  7. Al1Al

    Normal Upper Temperature - Piping Stress Analysis

    In para. 319.5 - ASME B31.3 ...The designer shall consider instantaneous maximum values of forces and moments in the original and extreme displacement conditions (see para. 319.2.3),...
  8. Al1Al

    Normal Upper Temperature - Piping Stress Analysis

    Charles Becht IV "It is common to evaluate piping flexibility for the design temperature, but it is not a Code requirement. It is certainly permitted, but in all cases, the worst case temperature conditions must be evaluated. For example, the temperature may be higher during a low pressure...
  9. Al1Al

    Normal Upper Temperature - Piping Stress Analysis

    OVERVIEW OF PROCESS PLANT PIPING SYSTEM DESIGN (Vincent A. Carucci) Piping Flexibility Temperature • Analysis based on largest temperature difference imposed by normal and abnormal operating conditions Stable Operation - Temperature range expected for most of time plant is in operation...
  10. Al1Al

    Normal Upper Temperature - Piping Stress Analysis

    In accordance with "ASME B31.3 Process Piping Course" (Charles Becht IV and Don Frikken): Temperature Range - Minimum temperature may be due to • Normal operation • Excursion operation • Expected winter temperature - Maximum temperature may be due to • Normal operation • Excursion operation •...
  11. Al1Al

    Normal Upper Temperature - Piping Stress Analysis

    OK. When you have access to good data, you don't have to add any margin to the expected maximum temperature. But, in this case, the maximum temperature of operation is the design temperature. Considering this maximum temperature operating is the temperature at which, under the coincident...
  12. Al1Al

    Normal Upper Temperature - Piping Stress Analysis

    How to ensure that the temperature is truly the maximum temperature without adding a safety margin?
  13. Al1Al

    Normal Upper Temperature - Piping Stress Analysis

    Sometimes the maximum operating temperature can not be calculated accurately, the maximum operating temperature should be determined by adding a safety margin to the operating temperature (50ºF). Often this maximum operating temperature with adding a safety margin is the design temperature...
  14. Al1Al

    Normal Upper Temperature - Piping Stress Analysis

    In accordance with ASME B31.3, does the phrase “maximum metal temperature...for the thermal cycle under analysis” in para. 319.3.1(a) require the use the normal upper temperature under operating conditions, and exclude all short-time excursions above such normal operating temperature in...

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