F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
78/40
F16L 13/02 (2006.01) B23K 9/23 (2006.01) B23K 35/00 (2006.01)
Patent
CA 1151910
STEPPED TRANSITION JOINT ABSTRACT A transition joint is disclosed for joining to- gether tubular pieces formed respectively from a low alloy or carbon steel and a high temperature alloy compos- ition including approximately 20% chromium, the transition joint including a plurality of tubular parts welded together and formed from standard code approved materials of selected composition with a maximum variation in chrom- ium content of approximately 2-5% between adjacent parts when the chromium content is below approximately 10% and a maximum chromium content variation of approximately 3-7% between adjacent transition parts when the chromium content of either part is above approximately 10% in either part, the transition parts being joined by friction welding and/or fusion welding and/or formed entirely by fusion welding deposition. The transition parts are also graded as to thermal expansion and strength characteris- tics and the transition parts at opposite ends of the transition joint are preferably formed from low alloy or carbon steel and high temperature alloy composition respectively to facilitate in situ installation of the transition joint.
375580
General Atomic Company
Macrae & Co.
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