| 摘要 |
A pipe fitting (32) has an inner tubular body (33) in screw threaded engagement (41) within an outer tapered bush (37). The bush (37) is adapted to locate into a hole (9) drilled in a pipe (1). The inner body (33) has a tapered seal (35) mounted on a flange (34). The outer bush (37) has an external seal (40). A pilot hole (9) is drilled under pressure into a lined pipe (1) which is connected in service. Retainer means (25) is inserted into said pipe (1) and a large hole is cut with the cut out portion retained. The pipe fitting (32) is inserted by locating the outer bush (37) into the hole such that the external seal (40) rests on the pipe surface. The inner body (33) is withdrawn away from the hole with the bush (37) stationary. The tapered seal (35) is deformed and acts to seal the interior of the pipe (1) to the fitting (32) and to trap the lining (23). |
