Hainan Municipal Pipeline
1. High ring stiffness and strong resistance to external impact: Ring stiffness Up to SN12.5, SN16 and higher; MRP is a flexible pipe. When it is subjected to external impact, it has excellent shape recovery and strong resistance to uneven settlement of the foundation.
2. Good corrosion resistance, aging resistance and cold resistance: the materials MRP contacts with the outside world are HDPE with strong corrosion resistance, and will not be corroded by acid, alkali and oil in sewage and waste water; The service life is more than 50 years; At minus 60 ℃, MRP will not freeze and leak.
3. Good hydraulic characteristics: smooth inside, small friction resistance, fast transmission of media, drainage and sewage. Under the same conditions, the flow rate of cement pipes with the same inner diameter is 40% higher than that of cement pipes with the same inner diameter.
4. Light weight, reliable connection, fast installation and low cost.
Steel belt bellows and double wall bellows are two different materials, which should be clearly distinguished before purchase for future purchase. What are the differences between steel belt bellows and double wall bellows.
What are the differences between steel belt bellows and double wall bellows
1. Different pipe diameters. The diameter of steel belt bellows can reach DN300 to DN3000. The diameter of double wall corrugated pipe is generally DN200 to DN800.
2. Raw materials are different. The steel belt corrugated pipe is made of high-density polyethylene, with the steel belt coated with adhesive resin on the surface as the main support structure, and is made into a wavy shape. There are many PE raw materials for extrusion molding of double wall corrugated pipes. The forming process is mainly composed of pipe forming, pipe cutting and flaring, and the price is relatively cheap.
3. Different connection methods. Steel belt corrugated pipe is commonly used for electric heating band, hot fusion welding or combination connection. The connection mode of double wall corrugated pipe is simple, only limited to plug type, with poor water sealing effect and easy water leakage.
4. The burial depth is different. The steel strip pipe can be buried 6-7m deep. The double wall corrugated pipe can be divided into S1 and S2 according to strength. S2 is stronger than S1. The buried depth of S2 double wall corrugated pipe shall not exceed 2.5m, which is far less than that of steel belt corrugated pipe.
5. Ring stiffness is different. The rigidity of steel belt bellows ring is SN8, SN10, SN12.5, SN16, while the rigidity of double wall bellows ring is SN4 and SN8.
6. Prices are different. Due to the increase of production process, the budget of steel belt corrugated steel pipe is higher than that of double wall corrugated pipe. However, with the continuous development and improvement of process, it is only a little higher at present.
7. Different application fields. It is precisely because of the different strength, that is, the stiffness of the ring is different, the application fields of the two are also different. Many double wall corrugated pipes are not suitable for construction of highway drainage works with corrugated steel pipes.
