There are roughly six kinds of common PE structural wall pipes: HDPE double-wall corrugated pipe, HDPE steel tape reinforced spiral corrugated pipe, HDPE hollow wall pipe (winding structure wall pipe type A), HDPE cla pipe (winding structure wall pipe type B), HDPE double-flat wall steel-plastic composite wound pipe, HDPE internal rib reinforced spiral corrugated pipe.
1.HDPE double-wall corrugated pipe
Structural features: completely made of high-density polyethylene (HDPE), the outer wall presents a corrugated structure, the inner wall is smooth and flat. The double wall design can not only enhance the pressure resistance of the pipeline, but also effectively reduce the weight of the pipeline.
● Performance advantages: -- Common caliber DN200-DN800, suitable for small and medium-sized caliber pipeline projects; -- Corrugated outer wall to improve the compression resistance, ring stiffness to S4 and SN8, buried depth to 3 meters; -- Smooth inner wall to reduce fluid transmission resistance; - Light weight, easy to handle and construction, reduce installation costs.
● Application scenario: It is mainly suitable for drainage and rainwater sewage collection of gardens and green belts, as well as light-load and medium-depth drainage projects such as rainwater sewage discharge in residential areas.
● Connection mode: socket type rubber ring connection or heat shrinkable sleeve connection.
2. HDPE steel tape reinforced spiral bellows
Structural characteristics: Similar to double-wall bellows, the outer layer is also a corrugated structure, but the corrugated is lined with a "U" steel strip, which is covered by HDPE material to form a composite structure.
● Performance advantages: -- The common diameter range is DN300mm to DN2400mm; -- The ring stiffness is mainly SN8, SN10, SN12.5, and the burial depth is mainly within 5 meters; - Reinforced steel strip, strong compressive performance, able to maintain structural stability under large external pressure; -- HDPE wrapped steel tape, corrosion resistance, chemical corrosion resistance.
● Connection mode: hot shrinkable sleeve connection or electric melt belt connection
● Application scenario: It is mainly used for deep-buried, large-caliber, high-load municipal and industrial sewage drainage projects, rainwater collection, tunnel and underground engineering drainage.
3.HDPE hollow wall tube (winding structure wall tube type A)
● Structural characteristics: First, polyethylene is used as raw material to extrude rectangular tube embryo, which is wound and welded into a special hollow "work" shape pipe with double flat wall structure. The inner and outer walls are smooth and flat, with high ring stiffness and light weight characteristics.
● Performance advantages: -- Unique hollow "gong" shape structure, improve the resistance to external pressure without increasing the weight of the pipeline; -- Common caliber is DN200mm to DN3000mm; -- High ring stiffness, mainly SN8/SN10/SN12.5; -- lightweight design, easy to transport and construction;
● Application scenario: Suitable for municipal drainage, sewage treatment, rainwater collection system and agricultural irrigation and other medium buried depth and load scenarios.
● Connection mode: socket type rubber ring connection or heat shrinkable sleeve connection.
4.HDPE carat pipe (winding structure wall pipe type B)
● Structural features: hdpe all-plastic pipe, no steel strip, relying on a unique winding structure and corrugated design to improve the ring stiffness, ensure the pressure resistance of the pipe, smooth inner wall to reduce fluid resistance, hollow sandwich structure to achieve a balance of lightweight and strength.
● Performance advantages: -- The unique winding structure can effectively disperse the external stress and improve the pressure resistance; -- Common caliber is DN200mm to DN3000mm; -- The ring stiffness is mainly SN8, SN10, SN12.5, SN16, and the burial depth is mainly less than 8 meters; -- Intermediate sandwich design, forming a hollow structure between the inner and outer walls, to keep the pipe lightweight; -- All-plastic pipeline without steel strip, strong corrosion resistance, improve pipeline life;
● Application scenario: Carat pipe is mainly used in municipal large-scale drainage, sewage treatment, rainwater collection and industrial drainage system, especially suitable for long-term pressure and deep buried environment.
● Connection type socket rubber ring connection, electric melting connection or throttling connection.
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