There are three factors that affect the unit price:
1, pipe size; ?
2 ? The length of waterproof casing;
3? Thickness of the shell.
Waterproof casing can be divided into flexible waterproof casing, rigid waterproof casing, steel flexible waterproof casing, rigid sealing sleeve for protection on both sides, electrical sleeve, slender flexible waterproof casing, etc. Different specifications of waterproof casing have different uses. When the pipeline passes through the foundation, inner wall, floor, etc. , pipes (pressure pipes, such as water supply and heating, etc.) should be avoided. ) will interfere with the building when working, which is convenient for the installation and maintenance of the pipeline. Waterproof casing products need to be installed, which are protective components installed outside the pipeline. Generally, the diameter of the waterproof casing is larger than the outer diameter of the installation work pipe. The material and length can be selected according to the actual application to meet the use requirements.
This paper mainly introduces two commonly used waterproof casing: flexible waterproof casing and rigid waterproof casing.
Flexible waterproof casing: Flexible waterproof casing is used for pipeline penetrating through the wall, which has the functions of shockproof and waterproof. Flexible waterproof casing is made according to professional design drawings. Flexible waterproof casing can't be used when it encounters non-concrete. Can only be used for concrete walls. The flange pressure plate at the top is exposed outside the wall and cannot be embedded in the wall. Otherwise, the flexible waterproof casing will lose its function, and the waterproof casing must be installed in place at one time during the installation. Waterproof casing cannot be replaced or moved after installation, so care must be taken during installation. Flexible waterproof casing is mainly used in construction, tap water, sewage treatment and other units.
Rigid waterproof casing: A waterproof wing ring (annular sleeve made of steel plate) is added to the steel pipe of rigid waterproof casing, which is a kind of protective sleeve sleeved outside the pipeline to prevent the pipeline from being damaged by load when crossing railways, highways and streets. Most of them are installed in the wall (concrete wall), which is used for general pipes to pass through the wall, which is beneficial to the waterproof of the wall. The national standard rigid waterproof casing has strong compressive capacity and can effectively bear the wall pressure.