The pipe clamp itself is not a seal, it only provides radial buckle force to prevent the hose from pulling

       There are several possible reasons for poor sealing:

Mismatch between hose and connector: the inner diameter of hose should be slightly smaller than the outer diameter of connector. If the inner diameter of hose is larger than that of connector, then the hose will wrinkle when the hose is clamped to the connector, just like tying a belt, the pants are wrinkled, and the wrinkled place is the leakage channel

       There is deep axial scratch on the joint, and the scratched place is used as the leakage channel

       The pressure is too high, which has exceeded the limit of the sealing structure. Replace the sealing structure, such as: use the attachment joint instead