DN180 waterproof casing 02s404 flexible waterproof casing rigid waterproof casing

The advantages of using seamless steel pipes as raw materials for rigid waterproof casing and flexible waterproof casing. The relevant processes that should be completed before installation of flexible waterproof casing, such as flaw detection, heat treatment, pressure test, cleaning, degreasing, internal anti-corrosion and lining, etc. have been completed and meet the requirements
The equipment connected by the flexible waterproof casing has been calibrated and fixed, the secondary grouting has met the requirements, and the notification of permission for piping has been obtained
The interior of the pipe sections, pipe fittings, valves, etc. has been cleaned, leaving no dirt or debris.
The pipes, waterproof casings, fittings, valves, gaskets, etc. have been checked according to the design requirements, and their material specifications and models are correct. The quality of the pipeline prefabrication meets the requirements
The pipes, fittings, valves, etc. have been inspected and qualified, and have the required technical certificates. The advantages of using seamless steel pipes as raw materials for rigid waterproof casing and flexible waterproof casing
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 flexible waterproof casing pipe installation. .
The civil engineering work related to the flexible waterproof casing has been completed and passed the joint inspection by relevant personnel from the civil engineering and installation units. During the inspection, the pipe frame foundation, pipe bridge, pipe pier, pipe trench, cushion, valve well, and embedded parts used in the pipeline, reserved holes, waterproof shoulders, etc. should be checked according to the drawings. They must comply with the design regulations and meet the installation requirements. The civil engineering and installation parties should countersign and approve each other.