| 摘要 |
<p>The present invention relates to a ball joint apparatus for piping, and more specifically, to a ball joint apparatus for piping, which can prevent inflow of foreign substances even if it is installed in the ground, under water, and into the atmosphere, and can stably maintain air tight, thereby improving durability and quality, securing stability of operation, and securing stability of pipes. The ball joint apparatus for piping comprises: a body unit combined on one side pipe; a joint external pipe having a ball housing unit; a joint internal unit having a connection unit and a ball unit; an air tight member embedded between the ball unit and an internal surface of the ball housing unit; an air tight unit protection member settled on an external surface of the ball unit; and a pressurization member elastically pressurizing the air tight unit protection member.</p> |
