A, hdpe double flat wall steel-plastic composite drainage pipe national standard
HDPE double flat wall steel-plastic composite winding A-type structure wall pipe is a T-shaped strip prefabricated with polyethylene (PE) as the main raw material, which is wound and welded into a pipe on a pipe forming machine. At the same time, the W-shaped steel strip made of galvanized steel strip is embedded in the groove between the two steel strips, and PE is coated on the steel strip, which becomes the third generation of new steel-plastic drainage pipe on the outer wall of the pipeline. This product combines the quality advantages of high-density polyethylene double flat-walled hollow spiral wound wall tube (standard: GB/T 19472.2-2004) and innovatively embeds steel strip, so that the double flat-walled hollow wound wall tube achieves low cost and more stable performance when the diameter reaches 3000 mm
The technical system (standard: CJ/T329-20 10) of double flat-wall steel-plastic composite winding A-type structure wall-penetrating pipe has won many national patents and passed the double-standard inspection of National Chemical Building Materials Testing Center. The product quality meets the national standard GB/T 19472.2-2004? And the related ring stiffness grade of industry standard CJ/T329-20 10.
Second, the performance characteristics of HDPE double-flat-wall steel-plastic composite winding A-structure through-wall pipe
1, the ring height of HDPE double flat wall steel-plastic composite winding A-structure through-wall pipe. After testing and engineering application, the ring stiffness is more than or equal to ≥SN8, and the highest can reach SN 16, which is incomparable to ordinary plastic pipes.
2.HDPE double-flat-wall steel-plastic composite winding A-structure wall pipe has good chemical properties. Its main raw material is polyethylene (PE) resin, which can resist the corrosion of various chemical media and does not react with ordinary acids, alkalis and salts. Soil or transported fluid chemicals will not cause any degradation, decay, rust and corrosion to pipelines, and will not cause secondary pollution to transportation media.
3. Low liquidity. The roughness of HDPE double flat-wall steel-plastic composite winding A-type structure wall pipe is 0.0 1, which can obtain larger design flow and smaller friction resistance compared with other similar pipes.
4.HDPE double flat-wall steel-plastic composite winding A-structure wall tube steel strip has good corrosion resistance. Traditional steel-plastic pipes connect steel belts and pe belts together. Because the expansion coefficient of PE is 10 times that of steel, thermal expansion and cold contraction = cold expansion.
PE plastic is easy to crack during processing, which makes the traditional steel-plastic pipe lose its corrosion resistance. Double-flat-wall steel-plastic composite winding A-type structure wall pipe is formed by winding and welding prefabricated plates to form the inner wall. At the same time, the corrugated steel strip is embedded between the two plates and the strip.
In the "groove", polyethylene (PE) is coated on the steel belt to form the outer wall of the pipeline; At the same time, the distance from the pipe end is 10 in order to avoid the pipe wall cracking caused by different thermal expansion and contraction rates of steel and plastic and ensure the complete sealing of the steel strip.
15cm has no steel belt, and the pipe ends are all sealed with welding gun and pe. So the steel strip is completely wrapped and protected by PE plastic layer to prevent the steel strip from oxidation and direct contact? Transport medium.
5. The installation of HDPE double flat-wall steel-plastic composite winding A-structure wall-penetrating pipe is convenient. Due to the double flat structure of inner and outer walls, pipe-to-pipe connection and pipe-to-manhole connection are adopted, which is convenient and quick to install.
6.HDPE double flat wall steel-plastic composite winding A-type structure wall-penetrating pipe is resistant to ground settlement. Due to the advanced structural design and reasonable process design, the double flat-walled steel-plastic composite winding A-type structural wall pipe has both rigidity and flexibility.
Yes The extremely bad destructive tests we conducted proved that the double flat-walled steel-plastic composite winding A-type structural wall pipe can resist harsh environment and ground settlement.
(1) The pipe section is flattened by 50%, and there is no crack on the inner and outer walls.
(2) Apply pressure at the midpoint of the tube, the compression is 65438 03%, the inner wall bulges, and the outer wall does not crack.
7.HDPE double flat wall steel-plastic composite winding A-type structure wall-penetrating pipe is watertight. Advanced structure, advanced strip voltage welding, uniform and firm joints.
8. The service life of 8.HDPE double flat-wall steel-plastic composite winding A-type structure through-wall pipe is long. Double-flat wall steel-plastic composite winding A-type structure through-wall pipe is designed according to the expected service life of 50 years. The related process control and test inspection of its products from raw materials to finished products are completely implemented in accordance with the national construction industry standard CJ/T329-20 10 "Double-flat-wall steel-plastic composite wound A-type structure wall-penetrating pipe".
Three. Application field of HDPE double flat wall steel-plastic composite winding A-type structure through-wall pipe;
1, which is suitable for industrial, chemical, pharmaceutical and other industries to discharge corrosive sewage pipelines;
2. It is suitable for leaking drainage pipes of subways, railways and expressways;
3. Applicable to buried drainage and sewage pipelines around municipal engineering and construction engineering;
4. Suitable for large-scale docks, port projects and airport projects;
5. It is especially suitable for large drainage and sewage pipelines of municipal engineering.
Four, HDPE double flat wall steel-plastic composite winding primary structure wall pipe matters needing attention:
1, the pipeline shall not be subjected to violent impact, impact and heavy pressure during loading, unloading and transportation;
2. Pipes with small diameter and light weight can be manually loaded and unloaded. Large-diameter pipes need mechanical loading and unloading. When using mechanical loading and unloading? Flexible slings or ropes (nylon ropes) shall be used for the tubing, and the two lifting points on the tubing are about 1/4 length from both ends of the tubing;
3. The contact between the vehicle bottom and the ship and the pipeline should be as flat as possible, and measures should be taken to prevent rolling and collision, and do not touch sharp objects to avoid scratching the pipeline.
Cost-effective analysis of HDPE double flat-wall steel-plastic composite winding A-type structural wall pipe and steel-plastic drainage pipe commonly used in municipal engineering
The hdpe double-wall steel-plastic composite drainage pipe introduced above is applied in many places, including the construction process of water conservancy projects or municipal projects and the operation process of building projects. These are all because this kind of pipe not only has stable performance, but also meets the standard requirements in corrosion resistance and toxicity, and has environmental protection and economic benefits. In addition, we can find that the selection scheme of hdpe double flat wall steel-plastic composite drainage pipe is also very rich.
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