English
Chinese
Carat tube is thermally wound to form high-density polyethylene (hdpe) wound structural wall tube. The wall pipe is made of high-density polyethylene resin as the main raw material, adopts hot-winding poplar technology, and uses polypropylene (pp) single-wall corrugated pipe as the supporting structure to make a special structural wall pipe with high resistance to external pressure. Carat tube products can be divided into four series: pr, op, sq, and vw. There are some precautions for carat pipe construction in winter. The following Anhui Wanfang Pipe Industry will give you a detailed introduction.
1. General pipes will be embrittled at 0°. For projects that cannot avoid transportation, loading and unloading, installation and construction under low temperature conditions, avoid choosing low-pressure thin-walled pipes in pipeline selection, and try to choose thick-walled high-pressure grades. The pipes can improve the safety factor; and the Dollykal pipe will not freeze and leak in the environment of minus 60 ℃, which is worthy of consideration.
2. Strictly regulate the management of product handling, transportation, loading and unloading, and no throwing, falling, rolling, or dragging phenomenon should occur to prevent damage to the product. Especially in the process of unloading, it must be handled with care, and after transportation to the construction site, it must be properly kept to prevent the pipe from contacting and rubbing with sharp objects. People must not step on the pipe, especially when unloading thin-walled pipes (0.63mpa), to prevent cracking and internal injuries due to embrittlement.
3. The construction should be carried out above 5° as far as possible. The excavation of pipe trenches should consider the depth of local frozen soil. The pipeline must be buried below the frozen soil layer. The buried depth of the pipeline is generally 1.2～
Below 1.5 meters; the width of the trench excavation should be based on the outside diameter of the pipe, and the width of the bottom of the trench should be the outside diameter of the pipe plus 300 mm. Thermal insulation measures should be taken for the exposed pipes to prevent the pipes from freezing and cracking, and the pipes should not be trampled on during construction.
Below 1.5 meters; the width of the trench excavation should be based on the outside diameter of the pipe, and the width of the bottom of the trench should be the outside diameter of the pipe plus 300 mm. Thermal insulation measures should be taken for the exposed pipes to prevent the pipes from freezing and cracking, and the pipes should not be trampled on during construction.
4. The bottom of the ditch should be tidied and leveled, and there should be no rocks, bricks and other debris. If there are hard objects, 10cm must be dug and sand filled and compacted before the pipeline installation and construction. The pipeline should be straight and flat during construction, and should not be bent at will. If the pipeline must be bent, its bending angle should be carried out according to the allowable bending angle of each socket of the pipe (loop), generally within 2°, and no rigid bending of the pipe should occur. phenomenon.
