The full name of carat pipe is HDPE winding structure B-type structure wall pipe, which is a flexible pipe. The carat tube has good connection and air tightness, strong anti-settling ability, and long comprehensive service life. It has been rated as a key promotion of green environmental protection pipe products by the Ministry of Municipal Construction of China. So what are the common installation and construction specifications for carat tubes?
    Standard specification for the installation and construction of carat pipes: after the carat pipe is slotted, it should be placed on the undisturbed ground or tamped foundation, and the soil cover depth on the roadway shall not be less than 700mm; When pipelines pass through railways, highways and obstacles, protective sleeves made of reinforced concrete, steel, cast iron pipes, etc. should be installed. The internal strength of the casing should be more than 300mm larger than the outer diameter of the carat tube. The immediate space between the pipe and the casing should be filled with packing; The net width of the bottom of the carat tube groove. When the diameter of the pipe is less than DN450mm, the net width of each side of the pipe is D 0.3M; When the pipe diameter is greater than DN450mm, the net width of each side of the pipe is D 0.5M, and the diameter of the external pipe should be 600mm, so that proper manual work can be carried out at the bottom of the water tank; Carat tube basics. The pipe foundation adopts the soil arc foundation. For ordinary soil, a layer of medium-coarse sand with a thickness of 100 mm should be laid on the basis of undisturbed soil below the bottom of the pipe or on the basis of backfilling and compaction; Bedding thickness can be used when the local base soil is poor. Gravel substrates smaller than 200mm can also be divided into two layers. The lower layer uses gravel with a grain size of 5-32mm and a thickness of 100-150mm. The upper layer is covered with medium-thick sand, with a thickness of not less than 50mm; The foundation should be filled and reinforced with sand and gravel gravel, and after the bearing capacity of the foundation is greater than 50Kpa, the medium coarse sand foundation layer should be laid. How to connect the carat tube. For the hot-melt connection of the socket mouth, when installing the socket tube, the socket end should be along the water direction, and the socket port should be against the water direction, from bottom to top. When connecting carat tubes, when De < 400, a baffle should be installed on the baffle. Install with a crowbar.   When > 400, it can be connected with hand hoists and other power tools. When connected, the carat tube should be flat, and the deflection angle should not be greater than 2°. Backfill is carried out in strict accordance with the requirements to prevent the vertical deformation of the carat tube, and the deformation rate does not exceed 3%; BURIAL DEPTH: THE THICKNESS OF THE TOP COVER OF THE PIPELINE SHOULD NOT BE LESS THAN 0.7M, AND THE MAXIMUM COVER SHOULD NOT EXCEED 7M.