AWWA C207 - ARMCO Bulletin

[arondelo]

Hi,

trying to understand how AWWA flanges were sized I came across this part of the AWWA standard:

"There is no one exact stress-based design method that could reproduce the
thickness values in the tables. However, it appears the ring flange thicknesses in this
standard are based on using the LaTour-Barnard design procedure (ARMCO Bulletin
47-A, 1947) for ring flanges, which is based on ASME integral flange design procedures."

I looked at google, book finder, libgen and didn't find this ARMCO Bulletin 47-A, 1947. Can someone help me?

Thanks.