Process features: Stainless steel quick lock is used for local repair of DN300-DN2000 drainage pipes, suitable for repairing first and second level defects such as rupture, leakage, disconnection, and detachment of interface materials. It is not suitable for repairing severe pipe deformation and joint misalignment. Quick locks with a diameter of DN600mm or less should be installed with dedicated airbags, while those with a diameter of DN800mm or more should use manually installed multi piece quick lock structures.