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  1. VeeEng

    Differences in time dependent properties temperature for SA-387 Gr 11 Cl 2 in Table 5A of Sec II D

    Hi All, As per Table 5A of ASME Sec II part D (customary), for SA-387 Gr 11 Cl 2, note T5 states that "Allowable stresses for 850F and above are obtained from time dependent properties", Whereas per Table 5A of Sec II Part D (Metric), note T7 states that "Allowable stresses for 500C and above...
  2. VeeEng

    External Pressure check temperature limitation - Part 5, ASME SEC VIII Div 2

    Hi All, While performing external pressure check for SA-387 Gr 11 CL 2 material using protection against buckling per Part 5 of ASME SEC VIII div 2, what is the temperature limitation for time independent properties ? Whether values in Table 4.4.1(below 425 C) to be respected or can we proceed...
  3. VeeEng

    Grade 11 Low Alloy steel tube (of S&T HX) design for shell design pressure at 500 degC - ASME BP

    Hi All, I came across a case where shell side design pressure of a S&T Heat exchanger is 40 bar at 500 deg C. MOC for entire heat exchanger is Gr11 LAS. When considering design of tubes, external pressure calculation is at 500 degC. For this case, 1) Going by ASME Sec VIII Div 1, external...

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