F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
285/62
F16L 21/00 (2006.01) E21B 17/08 (2006.01) E21B 19/00 (2006.01) E21B 19/16 (2006.01) F16L 13/00 (2006.01)
Patent
CA 1125811
ABSTRACT OF THE DISCLOSURE The method comprises providing an extremely strong and elastic alloy steel ring having an inner diameter substantially smaller than the out- er diameter of the pipe to be joined, and an outer diameter much larger than such outer diameter of the pipe. Great axial forces are then employed to in- sert the pipe ends into the ring until an internal flange is abutted, thus stretching the ring without causing it to exceed its elastic limit. End seals are provided on the flange faces and are pinched off by the pipe ends, so that metal-to-metal contact results. Prior to forcing the pipe ends into the ring, it is mounted in an internal groove in a hinged clasp which aligns the pipe ends. The apparatus comprises the ring, the clasp and the seals, and further comprises the completed joint wherein the ring is under continuous great hoop stress.
346136
Hauk Ernest D.
Stewart Larry J.
Fetherstonhaugh & Co.
Service Equipment Design Co.
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