What is the difference between the black inner wall and the yellow inner wall of pe spiral corrugated pipe with steel skeleton?

Steel tape reinforced pe spiral corrugated pipe is a double-wall spiral corrugated pipe with high density polyethylene (pe) as the matrix, corrugated steel tape coated with adhesive resin as the main supporting structure, and polyethylene material as the winding compound. The advantage of pe spiral corrugated pipe reinforced by steel belt is 1. Steel belt reinforced PE spiral corrugated pipe fittings have smooth inner and outer walls and small friction coefficient. 2. The steel belt reinforced PE spiral corrugated pipe has high compressive performance: it can bear the pressure above 750N, so it can be exposed or hidden in concrete without being damaged by compression. 3. The steel belt reinforced PE spiral corrugated pipe has good impact resistance and heat resistance: in the process of concrete pouring, the casing will not break due to normal tamping impact, nor will it become soft due to condensation heat during construction. 4. Steel belt reinforced PE spiral corrugated pipe is moisture-proof and acid-and-alkali-resistant: it has excellent moisture-proof and acid-and-alkali resistance and will not rust. All joints are glued by PVC according to regulations, which can prevent water from infiltrating into the pipe and have better moisture-proof effect. 5. The steel belt reinforced PE spiral corrugated pipe will extinguish itself in case of fire, and the flame will not spread along the pipeline. 6. The bushing has excellent insulation performance, and it will not break down at AC2000V and 50Hz in the soaking state. In preventing accidental electric shock, the international trend is that insulation is better than grounding, and PVC sleeve just meets this requirement. 7. As special additives are added into the PE spiral corrugated pipe reinforced by steel belt, it will not give off peculiar smell, and will not cause insect and rat bites. Drawing and construction of steel belt reinforced pe spiral corrugated pipe: 1. Novel use of steel belt reinforced PE spiral corrugated pipe: 1. PE pipe with smaller diameter (Shandong Amazon Plastic Co., Ltd.) can be supplied by long coil pipe, which is very convenient for transportation, laying and installation. Flexible PE pipes with large diameter can generally be laid in the ditch after ground connection, which is very convenient for construction; 2. In some cases, the steel belt reinforced polyethylene spiral corrugated pipe can be laid by pipe jacking technology without digging the pipe trench; 3.pe pipes can be laid at the bottom of rivers, lakes, rivers and seawater by long immersed pipe method, or PE pipes can be laid in the desert without digging trenches. PE plastic pipe can be used as internal supplementary pipe to repair old drainage pipe. Secondly, the embedding and installation of PE large diameter pipeline and steel belt reinforced polyethylene spiral corrugated pipe. The selection and burial of pipelines is the main work of water supply and drainage system construction, and also the key point of municipal water supply and drainage engineering construction. The screening and inspection of construction materials and negligence in loading and unloading will affect the quality of pipes. In the process of pipeline screening, in order to make the construction work run normally, it is an important part to conduct a comprehensive inspection, mainly aiming at the demand for the number of pipelines in the construction section, the strict requirements for pipeline specifications, and whether the pipelines have the above quality problems. Finally, different PE pipes have different uses: the main characteristics of gas pipeline are reliable connection, fused connection and higher joint strength than the pipeline itself; Low temperature impact resistance. PE large-diameter pipeline steel belt reinforced polyethylene spiral corrugated pipe is more convenient to carry, much lighter than steel pipe, galvanized pipe and concrete pipe, easier to install and carry, without manpower and equipment, and reduces the engineering installation cost. 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 wall hollow spiral wound wall tube (standard: GB/T 19472.2-2004) and innovatively embeds steel strip, which makes the double-flat wall hollow wound wall tube lower in cost and more stable in performance when the diameter reaches 3000 mm The product quality meets the national standard GB/T19472.2-. Product specifications Product color raw materials are based on the standard service life φ 300-3,000 mm black polyethylene (PE) CJ/329-20 1 050 Performance characteristics of HDPE double flat-wall steel-plastic composite wound A-type structural wall pipe1,and the ring height of HDPE double flat-wall steel-plastic composite wound A-type structural wall pipe is high. After testing and engineering application, the ring stiffness is ≥SN8, the highest. 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. In traditional steel-plastic pipes, steel belts are connected with pe belts. Because the expansion coefficient of PE is 10 times that of steel, PE plastic is easy to crack in the process of thermal expansion = expansion and contraction, 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, corrugated steel strip is embedded in the "groove" between the two slats, and polyethylene (PE) is coated on the steel strip to form the outer wall of the pipeline; At the same time, in order to avoid the cracking of the pipe wall caused by the different expansion and contraction rates of steel and plastic, and ensure the complete sealing of the steel strip, there is no steel strip at the distance from the pipe end 10 ~ 15cm, and all the pipe ends are sealed with welding guns and pe. Therefore, the steel strip is completely wrapped and protected by the PE plastic layer to prevent the steel strip from oxidation and direct contact with the conveying 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. The extremely bad destructive tests conducted by us have proved that the double flat-walled steel-plastic composite wound A-type structure wall pipe can resist harsh environment and ground subsidence: (1) the pipe section is crushed by 50% and there are no cracks in 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". Application field of HDPE double flat wall steel-plastic composite winding A-type structure wall pipe: 1, suitable for discharging corrosive sewage pipes in industries such as industry, chemical plant and pharmaceutical factory; 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. Concern: 1. During loading and unloading, HDPE shall not be subjected to severe impact, drop and heavy pressure; 2. Pipes with small diameter and light weight can be manually loaded and unloaded. Large-diameter pipes need mechanical loading and unloading. When loading and unloading pipes by machinery, flexible slings or ropes (nylon ropes) should be used, and the two lifting points on the pipes are about 1/4 pipe length from both ends of the pipes; 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