Pipe coupling

Details Pipe coupling Pipe coupling

F - Mech Eng,Light,Heat,Weapons

16

L

285/47.2

F16L 37/00 (2006.01) F16L 15/06 (2006.01) E21B 17/042 (2006.01)

Patent

CA 2014851

A B S T R A C T A pipe coupling or connection comprises a female coupling component and a mating male coupling component. Each component is matingly threaded for coupling engagement, and each is provided with an adjacent sealing area. The sealing area of each coupling component is formed on a frusto-conical surface. The sealing area is provided with a controlled surface roughness, viz. very shallow fine surface variations, preferably formed as microgrooves at a pitch small relative to the pitch of the threads. The slope of the frusto-conical surface of the sealing area of the male component is slightly mismatched with that of the sealing area of the female component. The slight mismatch enables the sealing pressure to be above a design minimum throughout the entire sealing area yet higher at each end of the sealing area.

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