The method described by Kellogg company in 1941 was used worldwide until the 1980s, when programs and personal computers became available on the market. I made a simple calculation to check the accuracy of the method based on accurate charts described in the book. I am using the 1956 edition. Unfortunately, due to copyright I cannot publish the key tools, i.e. charts C11 and C12 from Annex C. However, I think that everyone involved in pipeline calculations has access to this fundamental book. For this particular data I worked in the dense part of the charts, which probably has some influence on the accuracy of calculations using this method.
The results are as follows:
Kellogg: stress in bend 11,664 psi, anchor force 1,649 lb
AutoPipe: 13,557 psi stress in bend, 1751 lb. fixed support force. Assumptions: zero LG gaps, 0.3 friction
