B - Operations – Transporting – 23 – P
Patent
B - Operations, Transporting
23
P
26/156, 285/18
B23P 11/02 (2006.01) B01J 3/00 (2006.01) F16L 23/20 (2006.01) F16L 41/10 (2006.01)
Patent
CA 1093115
RC-1424-M029 FATIGUE RESISTANT FITTINGS AND METHODS OF FABRICATION ABSTRACT OF THE DISCLOSURE A novel, fatigue resistant fitting of the joint ring type used between bolted, flanged sections of high pressure tubing is provided which safely and durably serves the dual functions of high pressure joint sealing and convenient instru- mentation tap access. The fitting comprises two concentric, thick-walled cylindrical shells with the outer shell shrink- fitted onto the inner shell which is free of threaded portions ox other stress concentration points except for one or two radial bores at about its midlength, and in axial alignment with each of said radial bores, a cleanly threaded aperture of sub- stantially larger diameter through said outer shell. For maxi- mum fatigue resistance under difficult service, the compound shell fitting is also subjected to an autofrettage treatment.
330789
El Paso Polyolefins Company
Gowling Lafleur Henderson Llp
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