| 摘要 |
The present invention relates to a new structure of a high efficiency contact pad, capable of guaranteeing excellent contact properties, chemical resistance properties, and insulation properties as well as excellent air tightness properties (preventing a leakage and preventing foreign substances from being permeated) required when flanges connecting pipes used in semiconductor manufacturing facilities and other pipes are combined. In a conventional contact pad (A) for assembling pipes, a fluid passing groove is formed on the center thereof similar to a washer or a doughnut; a ring-shaped pad (110) including a fixed thickness or width is installed on the outer circumference; a non asbestos material (120), which is flexible, soft, and strong, is embedded in the ring-shaped pad (110); and a PTFE (Teflons) outer cover (130) including excellent durability, chemical resistance properties, and oil resistance properties and low friction coefficient is formed on the surface of the non-asbestos material (120). One or more bolt support units (200) are additionally protruding from the outer circumference of the ring-shaped pad (110) in order to prevent a fastening bolt from being leant to one side even if there is sudden temperature change, vibration, or impact by easily inserting the fastening bolt (20) into flanges when the fastening bolt (20) is fastened to connect the flanges (10). |
