The flared end is then drawn up by the tube nut so the inside surface is tightly secured against the ball seat of the fitting.
接着通过管道螺母将扩口端拔出使其内部表面与管件球座紧密结合。
2
The tube nut is placed over the end of the copper tube to be joined; the tube end then is flared out at an approximate 45 degree Angle by a flaring tool.