| 摘要 |
<p>Provided is a method for manufacturing a large connection flange for connecting a large pipe capable of manufacturing a large flange with a metal plate by a simple and convenient work process to have high strength. The method for manufacturing a large connection flange for connecting a large pipe includes: a step for cutting a metal plate to a circular plate in a size of a flange with a required diameter; a step for boring an expansion hole in the center of the cut circular plate; a step for drawing the circular plate with the expansion hole to a flange part and a pipe part; and a step for forging the drawn circular plate into the required final product. Therefore, the method for manufacturing a large connection flange for connecting a large pipe can have high safety even in a high pressure or terrible flowing part and ensure a long service life.</p> |
