FIELD: pipe line engineering. SUBSTANCE: shaped part has pipe 1 with an opening over periphery of which branch pipe 2 is welded. Pipe 1 and branch pipe 2 are made of high-strength pig iron with ball-like graphite and are welded with nickel containing alloy. The inner and outer surface layers of the part to be joined are at a distance from each other that is no less than twice width of the pipe and at the depth no less than 0.1 mm outside and no less than 0.7 mm on the inner surfaces. EFFECT: improved design. 3 cl, 4 dwg
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Authors
Dates
1997-08-20—Published
1993-12-27—Filed