Verbindung für doppelwandige Rohrleitungen

摘要

In the joint (40) for duplex pipes, a clearance between the first outer pipe seal unit (110) and the second outer pipe seal unit (210) is defined larger than a clearance existing between the first inner seal portion (120) and the second inner pipe seal unit (220). Furthermore, the wire diameter of the O-ring (301) which functions as the sealing member for the outer pipe is defined larger than the wire diameter of the O-ring (401) which functions as the sealing member for the inner pipe.