Product Overview

High-quality carat tubes, i.e., heat-wound high-density polyethylene (HDPE) wind-wound structural wall pipes. The wall pipe is made of high-density polyethylene resin as the main raw material, using the hot winding poplar-type process, and using polypropylene (PP) single-wall corrugated pipe as the supporting structure to make a special structural wall pipe with high external pressure resistance. Carat tube products can be divided into four series: PR, OP, SQ, VW.

Carat pipe products can be divided into PR, OP, SQ, VW three series, including: PR, OP - mainly used for buried drainage pipes, SQ-mainly used for manufacturing containers or manholes, VW - mainly used for tees, elbows, secondary processing and forming pipe fittings, the most widely used in the product is PR series, the product has a smooth inner surface, the outside is a special-shaped reinforced structure, the standard length of the pipe is 6 meters, the inner diameter range of the pipe is DN300-DN4000, and the product indicators have reached GB/T 19472.2-2017 Type B structure wall pipe standard and PREN-13476 European standard requirements.

Performance characteristics of high-quality carat tubes

The performance characteristics of HDPE spiral structure wall pipe are as follows

1. The hot winding molding melt joint quality is high, and the flat strip and U-shaped strip in the molten state extruded from the extruder die are evenly wound on the heated drum mold according to the predetermined position, so as to ensure the quality of the weld joint of the structural wall tube. In particular, the weld joint of the flat strip in the structural design is covered by a polyethylene-coated support pipe, which improves the overall external pressure resistance of the product.

2. The pipeline connection with excellent installation performance adopts the socket plug-in electric fusion connection technology of the same material embedded electric fuse at the socket, and the connection quality is high. It can be 100% leak-free, ensuring the same life of the pipeline system and the safety of operation. At the same time, because the product is lighter than other pipes under the same application conditions, it is easy to transport, the construction is convenient and fast, and the construction cost can be reduced. In the acceptance of the project, the closed air test is used instead of the closed water test, which not only speeds up the acceptance speed, but also saves the complicated work and a large number of test costs in the closed water test.

3. Good flexibility The high-density polyethylene winding structural wall pipe has good flexibility on the macro level, and the local pipe section has strong rigidity and overall external pressure resistance, which can ensure the safety of traffic when used under the overload road surface. Due to the flexibility of the pipe, the damage loss of the pipeline can be minimized in the event of geological activities such as earthquakes and uneven settlement of the surface, thereby improving the ability of the utility to resist earthquakes and reduce disasters.

4. HDPE can be recycled, which is the main raw material of green and environmentally friendly products winding structural wall pipes, high-density polypropylene, without any toxicity, and without any dyes in the production process, and the waste pipes can be 100% recycled and reused. It is indeed an environmentally friendly and safe green product.

5. Anti-corrosion, anti-aging, service life to ensure 50 years High-density polyethylene has a strong ability to resist chemical corrosion and erosion. Therefore, when transporting corrosive fluids or laying in corrosive soil, the winding structure wall pipe does not need anti-corrosion treatment, and its performance is much better than that of other pipes. In the design process of the product, a reasonable product structure is selected to ensure that the service life of the plastic pipe is more than 50 years, and it is maintenance-free during the life cycle.

6. The roughness of the inner wall of the pipe is low, and the roughness of the inner wall of the pipe product around the structural wall is about 0.010, so the specific friction resistance is smaller when transporting the fluid, and the water conveyance can be greatly improved compared with the cement pipe under the same use conditions. Therefore, the cement pipe with a larger inner diameter can be replaced by the winding structure wall pipe with a smaller inner diameter in the application, and the engineering and reliability of the winding structural wall pipe used under the same conditions will be improved compared with the traditional pipe, and the comprehensive benefits are obvious, especially when the construction site is narrow, the building is dense, the underground pipeline is complex and the traffic is busy, and when the acid and alkaline soil is laid, it is more superior.

Features of high-quality carat tube products

1. The raw material HDPE meets the national environmental protection requirements, the production process is pollution-free, and can be 100% recycled, which is a green and environmentally friendly product.

2. The hot winding steel mold is formed, and the pipe joint quality is high.

3. Good flexibility, in the occurrence of earthquakes, uneven settlement on the surface and other geological activities, it can also minimize the loss of pipeline damage, thereby improving the ability of public facilities to resist earthquakes and reduce disasters.

4. The rib bars of the carat tube and the soil form a root resistance effect to reduce the stress hazards of cold and hot shrinkage to the well.

5. The unique socket-type electric hot melt connection technology has excellent connection performance with zero leakage, which ensures the safety of pipeline system operation, prolongs the service life of the road, and effectively protects the underground water source and soil from pollution.

6. The system accessories are complete, with various supporting pipe fittings and inspection wells, which can be assembled into a complete pipeline system.

7. The drainage and circulation performance is superior, the inner wall of the pipe is smooth, the specific friction resistance is small, the flow rate is fast, and the flow rate is large.

8. Anti-corrosion, anti-aging, long service life, good wear resistance and toughness of pipes, stable chemical properties, no anti-corrosion treatment, can resist the corrosion of various acids and alkalis, and the service life is more than 50 years.

9. The weight of high-quality carat pipe is light: the reinforced structure and scientific design of high-density polyethylene winding structure wall pipe are used under the same engineering conditions, and its weight is only a fraction of that of cement pipe and steel pipe, and the construction is more convenient and fast.

Carat tube production process

Carat tube (HDPE winding structural wall B-pipe) is a high-density polyethylene large-diameter winding reinforced pipe produced by hot winding molding process. The 190 °C flat and U-shaped strips extruded from the extruder's die are evenly wound around the heated steel roller mould in a predetermined position and are naturally cooled to ensure the quality of the tube welds. In particular, in the structural design, the weld joint of the flat strip is covered by the coated support pipe, which also improves the quality of the weld joint of the pipe and the overall external pressure resistance of the product.

1. Carat pipe pipe connection, using embedded electric fuse in the socket and plug-in electric fusion connection technology of the same material, the connection quality is high. It can be 100% leak-free, ensuring the same life of the pipeline system and the safety of operation. At the same time, because the product is lighter than other pipes under the same application conditions, it is easy to transport, the construction is convenient and fast, and the construction cost can be reduced.

2. Carat tube has good flexibility. The high-density polyethylene winding structural wall pipe has good flexibility on the macro level, and the local pipe section has strong rigidity and overall external pressure resistance, which can ensure traffic safety when used under over-heavy load pavement. Due to the flexibility of the pipe, the damage loss of the pipeline can be minimized in the event of geological activities such as earthquakes and uneven settlement of the surface, thereby improving the ability of the utility to resist earthquakes and reduce disasters.

3. The carat tube has good sealing. The PE pipe itself is welded and connected (hot melt or electric fusion), which essentially ensures the identity of the interface material, structure and pipe itself, and realizes the integration of the joint and the pipe. The tensile strength and burst strength of the interface are higher than that of the pipe body, which can effectively resist the hoop stress and axial stress caused by internal pressure. As a result, there is no risk of leakage caused by twisting of the joint, and the sealing performance is very good compared to rubber ring joints or other mechanical joints.

The main production process of carat tubes

1. Winding: In the hot winding molding process, the HDPE flat strip in the molten state and the circular stiffener covered with PP are synchronously wound on the steel mold heated to a predetermined temperature.

2. Cutting: The pipe bearing and plug ports are processed to standard sizes.

3. Demolding: The pipe is detached from the mold.

4. Modification: make the appearance smooth and standardized.

5. Electric fuse embedding: The inner wall of the pipe socket is embedded with an electric fuse.

6. Product inspection: test the appearance and size of the product to ensure that the qualified product leaves the factory.

The main use of carat tubes

Carat pipes are mainly used in municipal underground drainage, sewage, rainwater collection, water transportation, ventilation, etc. It can be used as a seepage and drainage pipe for railways, highways, golf courses, football fields, etc. Due to the excellent acid, alkali and corrosion resistance of polyethylene and polypropylene materials, they are widely used in nuclear power, steel mills, power plants, petrochemicals, docks, stations and other fields, especially in harsh environments such as tidal flats, saline-alkali land, submarine riverbeds, soft foundation expansive soils, and seismic zones.