DN125 waterproof casing flexible waterproof casing rigid waterproof casing

The work that must be completed before the flexible waterproof casing is installed
The relevant procedures that should be completed before the flexible waterproof casing is installed, such as flaw detection, heat treatment, pressure test, cleaning, degreasing, internal anti-corrosion and lining, etc. have been completed , and meet the requirements
, the inside of pipes, pipe sections, pipe fittings, valves, etc. have been cleaned, leaving no dirt or debris
, the civil engineering work related to the flexible waterproof casing has been completed, and the civil engineering Check with the relevant personnel of the installation unit to pass the inspection. During the inspection, the pipe frame foundation, pipe bridges, pipe piers, pipe trenches, cushions, valve wells, as well as the embedded parts, reserved holes, waterproof shoulders, etc. used in the pipelines should be checked according to the drawings. They must comply with the design regulations and meet the installation requirements. Require. The civil engineering and installation parties should sign and approve each other
and check the protective plates used for installing or welding pipe supports and hangers on the equipment. Their location and quantity should meet the requirements for the installation of flexible waterproof casing pipes.
, pipes, pipe fittings and valves, etc. have been inspected and qualified, and have the required technical certificates
, pipes, waterproof casing fittings, valves, gaskets, etc. have been checked according to the design requirements, and their materials and specifications , The model is correct and the quality of the pipeline prefabrication meets the requirements
The equipment connected to the flexible waterproof casing has been calibrated and fixed, the secondary grouting has met the requirements, and a notification of permission for piping has been obtained.