| 摘要 |
Method for establishing a secure pipe sleeve connection in a water heater steel tank, comprising pressing a straight portion (7) of the material of the tank wall into the interior of the tank or outwardly to the exterior of the tank (1), to model internal threads (2) in the straight portion (7) by thread rolling threads (2), and to screw into the straight portion (7) a pipe sleeve (3) having corresponding external threads. <??>Pipe sleeve connection in a water heater steel tank, comprising a pipe sleeve (3) having outer threads is screwed into a straight portion (7) being pressed inwardly or outwardly from the material of the tank wall and being provided with rolled internal threads (2). <IMAGE>
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