Calculation of the strain coefficient A for externally pressurized vessels

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Thin-walled cylinder: radius-to-thickness ratio of 500, length-to-diameter ratio of 2； Based on the interpretation in standard GB150 (SY4-5), the value of coefficient A that I calculated is 5.87E-5, whereas the value of A given in Table 4-2 of GB150 is 5.79E-5; ---------------------------------------------------------------------------------------------------------------- Diameter-to-thickness ratio: 4, length-to-diameter ratio: 2.2 ； Based on the interpretation in standard GB150 (SY4-3), the value of coefficient A that I calculated is 6.88E-2, whereas the value of A according to GB150 is 9.59E-2; ---------------------------------------------------------------------------------------------------------------- Additionally, I noticed that Table 4-2 of GB150-2011 does not provide the strain coefficient A corresponding to a diameter-thickness ratio of 10 and a length-diameter ratio of 0.1. What is the reason for this? When the diameter-to-thickness ratio is 10 and the length-to-diameter ratio is 0.56, the value of coefficient A calculated by me based on the definitions in GB150 standard (SY4-5) is 9.84E-2, whereas the value of A in Table 4-2 of GB150 is 9.64E-2; ---------------------------------------------------------------------------------------------------------------- Below is a summary I prepared by reviewing PPTs available online as well as GB150-2011, regarding the scope of application of the formula for calculating the strain coefficient A for cylinders. Please check if this is appropriate