ASME II-D, subpart 3 - definition of P.L.
ASME II-D, subpart 3 - definition of P.L.
(OP)
I was programming an Excel file to calculate to verify external pressure, and Im using the mehtod of VIII-1 para UG-28. Upon further review of ASME II-D subpart D, table HA-5 and table NFN-15 show "P.L." at certain values of B. What does P.L. mean? I did not dick through the complete code to find any leads but as far as I know havent seen this in the code.





RE: ASME II-D, subpart 3 - definition of P.L.
However take a look into Figure HA-5, you will notice that each curve has two segments, the left side segment is a straight line, and then it reaches what I call the “inflection point” meaning that when, for the 20°C curve, A=0.00134 and B=131 the straight line ends and then a curved segment starts. A lot of curves in II-D have this characteristic.
I have no idea on what “P.L.” means but to my eyes that is the “inflection point”. And for my calculations I have had no problems.
Hope this helps.
RE: ASME II-D, subpart 3 - definition of P.L.
On the other, I dont foresee any future need for figure HA-5 nor NFN-15, we usually deal with other materials, but I'm still curious to know what it means.
/edt; the oldest copy I have for II-D is 2004, and it's in that one too, so I guess it's not something new/from the recent past
RE: ASME II-D, subpart 3 - definition of P.L.
RE: ASME II-D, subpart 3 - definition of P.L.
So I guess this proportional limit only exists for HA-5 and NFN-15.