Proper functioning of flanged joints requires good design, which will ensure both joint integrity and leak tightness since consequences can be disastrous. Many international codes and standards address flanged joint design. Some design philosophies emphasize more on joint integrity by controlling the stresses;1 – 6 others like the relatively new EN15917,8 address both the joint integrity as well as leak tightness criteria.
There are numerous papers on the relative merits and demerits of the different code/ standards methods, but often a field engineer looks for some simple solutions to combat this problem. This article provides a simple mathematical model of a bolted flanged joint
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