BRANCH CONNECTION STUB, BRANCH CONNECTION DEVICE COMPRISING MAIN PIPE AND BRANCH CONNECTION STUB, AND METHOD OF CONNECTING BRANCH CONNECTION STUB BY WELDING

摘要

PROBLEM TO BE SOLVED: To manufacture a branch connection part by using a technique allowing the branch connection part to endure thermal and mechanical acting force received by the branch connection part and a main pipe.;SOLUTION: Branch connection stubs 120 and 120' connected to the main pipe 130 have each an outside surface of a rotating body, and also has at least one or more axial internal passages 121a, 121b; 121a', 121b, rear segments 122, 122' with fastener flanges 122a, 122a', intermediate segments 124, 124', and front segments 126, 126' having free ends 127, 127' having a circular outline suitable for being mounted by plane welding around circular openings 132, 132' in the wall of the main pipe 130. The intermediate segments 124, 124' comprise first walls 124, 124' and second walls 124b, 124b', and an acute angle towards the internal passage is formed between both the walls.;COPYRIGHT: (C)2009,JPO&INPIT