The retain ring configuration uses heavy
wall pipe and has a machined butt end
face, along with an annular groove on the
After machining, the flange is slipped
onto the pipe and a retain ring (which
consists of a segmented stainless steel
ring bound by a spiral wound stainless
steel spring) is sprung over the pipe's
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.
Pipe sizes 1 1/2" through 8" are available
for use with retain ring flanges.
The standard connection styles offered
conform to SAE and ISO 4-bolt flanges
along with Tube-Mac® Industries 8-bolt
proprietary flanges. Other flange patterns
may also be available.