Pipe Extrusion Line – PVC-O Pipe Extrusion Line

Description

PVC-O pipe is the latest evolved form of PVC pipe. It is a type of pipe manufactured through a special orientation processing technology (biaxial stretching technology). The PVC-U (M) pipes produced by the extrusion method are axially and radially stretched, enabling the long-chain PVC molecules in the pipes to be regularly arranged in a biaxial direction, resulting in a new type of PVC pipe with high strength, high toughness, high impact resistance, and crack resistance.

Application fields：

PVC-O is mainly applied in fields such as water supply pipelines, mine pipelines, pipelines for trenchless laying and repair, gas pipeline networks, and power and communication protection pipelines.

Comparison of conventional materials：

Serial number	Performance	PVC-U	PE	PVC-O
1	Mechanical properties – Impact resistance	It is brittle below 5℃, and its compressive performance is average.	Slow cracks appear, and the compressive performance is average.	Resistant to low temperatures, with better impact resistance at room temperature; effectively prevents cracking.
2	Mechanical properties – Flexural resistance	It is not easy to bend, has poor toughness; construction is inconvenient and special fittings are required for connection.	It is relatively easy to bend, but requires a greater wall thickness under the same pressure.	It is more flexible and has better toughness. Under the same pressure, the wall thickness is relatively thin, which is convenient for construction. When the bending is ≤15°, no special fittings are required for connection.
3	Environmental performance – carbon emissions	Use less non-renewable petroleum raw materials, but use more raw materials, resulting in a higher carbon emissions.	Using more non-renewable petroleum raw materials and a larger amount of raw materials will result in higher carbon emissions.	Use less non-renewable petroleum raw materials and fewer raw materials, resulting in the lowest carbon emissions.

Cost analysis：

Compared with PE pipes, Ф315 PVC-O and PVC-U pipes have the following characteristics: the wall thickness of PVC-O pipes is 6.2 mm, the wall thickness of PVC-U pipes is 12.1 mm, and the wall thickness of PE pipes is 18.7 mm. The weight of PE pipes per meter is about 1 kg heavier than that of PVC-U pipes and 9 kg heavier than that of PVC-O pipes. This means that when using PVC-O pipes with the same diameter and pressure, users can save 9 kg of raw material cost per meter. Therefore, when laying a one-kilometer-long pipeline, users can save 9 tons of raw material cost. In addition, the price of PE raw materials is about 3,500 yuan higher per ton than that of PVC raw materials. Therefore, users can save a significant amount of material costs by choosing PVC-O pipes.

Types of pipes	Specifications	Pressure level	Wall thickness of pipes	Unit weight (kg/m)
PVC-O	φ315	1.0MPa	6.2mm	9.36
PVC-U	φ315	1.0MPa	12.1mm	17.856
PE100 pipe	φ315	1.0MPa	18.7mm	18.339

Water flow analysis：

The wall of the PVC-O pipeline is thin, and the water passage area is large. If the flow velocities of these two types of pipelines are both set at 1 m/s, when comparing a 315mm×1.0MPa PVC-O pipeline with a PE pipeline, the flow rate of the PVC-O pipeline is 258.9 m³/h and 6213.6 m³/d, while the flow rate of the PE pipeline is 217.9 m³/h and 5229.3 m³/d. From the comparison of the above set of figures, it can be seen that compared with the flow rate of the PE pipeline, the PVC-O pipeline can transport approximately 984 m³ more water per day, and nearly 360,000 m³ more water for users in a year. Undoubtedly, this saves a large amount of electricity costs.