I have a query regarding flange leakage calculation module in Autopipe.
Sample flange data is for 10" 300# ASME B16.5 flange, connecting pipe schedule is 40. Hub length as per ASME B16.5 is 69.85 mm.
Autopipe flange module also takes 69.850 as the hub length from material database .
As stated in ASME VIII ,Div 2 Fig 2-4 of Mandatory Appendix 2, if hub slope exceeds 1:3, hub length needs to be updated as per the correction factor for further calculations.
Does Autopipe considers this correction factor in the flange leakage calculation or should this corrected hub length be defined by user in the input field itself.?
Hello eshiva and thank you for your question. Are you referring to Figure 2-4 of ASME VIII Division 1? By correction factor, do you mean the hub stress correction factor, and figure 2-7.2?
Hi Taylor ,
By correction factor we mean the Hub length correction factor as per Fig 2-4 of Mandatory Appendix 2 (with reference to ASME B16.5 Fig 7 and 8). Not the hub stress correction factor and Figure 2-7.2.
I'm sorry, but I still cannot understand what you are referring to. Could you give me the exact phrasing of the code that states the hub length correction factor? I see in Figure 2-4(6) reference to 1:3 hub slope, but no reference to a correction factor.