Retaining Ring Flange
According to SAE J518/IS0 6162/IS0 6164
The configuration of the retain ring uses heavy wall pipe,
features a machined butt end face, and includes an annular groove on the outside diameter.
After machining, the flange is slipped onto the pipe,
and a retain ring-comprising a segmented stainless steel ring bound by
a spiral-wound stainless steel spring-is sprung over the pipe's outside diameter,
nesting in the annular groove.
Bolting the flanges together draws them against the retain rings,
with the o-ring seal retainer captive within the connection.
