Complete Analysis Of Polypropylene (PP) Tubes -- Classification, Characteristics And Differences.

1. What is PP tube?
Polypropylene (PP) is a polymer compound generated by polymerization of propylene monomer, and polypropylene (PP) pipe is a thermoplastic pipe made of polypropylene material by extrusion molding process, the pipe has light weight, high strength, corrosion resistance, high temperature resistance and other excellent characteristics.

 

2. The production process of PP tube.
Extrusion molding process is the main production process of polypropylene (PP) pipe, with the characteristics of high efficiency, continuous production and quality stability, is through the polypropylene raw material heating and melting, and under the push of the screw extruder, through the mold forming into the pipe, the pipe after forming through cooling, traction and cutting, and finally get the product that meets the specifications.

 

3. The classification and characteristics of PP tubes.

• PP-H (Homopolymer polypropylene tube)

Raw materials: All made of propylene monomer polymerization, molecular arrangement is relatively uniform and regular;

Characteristics: high strength, good chemical resistance and high temperature resistance, but poor low temperature impact resistance;

Long-term use temperature: 0-100℃ (approximate range);

Application scenario: It is suitable for conveying high-temperature liquids and chemicals, such as chemical plants and industrial pipelines. 

• PP-B (Block Copolymer polypropylene Tube)

 Raw material: made of propylene monomer and ethylene monomer through copolymerization;

Characteristics: Due to the addition of ethylene monomer, the crystallinity of PPB is low, which makes PPB pipe softer and better toughness than PPH pipe, effectively improving low temperature impact performance;

Long-term use temperature: -20℃-60℃ (approximate range);

Application field: Mainly used for cold water and warm water transportation, suitable for water supply and drainage systems of buildings.

• PP-R (random copolymer polypropylene tube)

 Raw materials: ethylene monomer is irregularly distributed in the propylene chain in the molecular chain, forming an overall uniform copolymer;

Characteristics: Due to the random distribution of ethylene monomer, the crystallinity of PPR is between PPH and PPB, which makes the PPR tube not only has a certain rigidity, but also has good flexibility and low temperature resistance;

Long-term use temperature: -10℃-65℃ (approximate range);

Use: Commonly used in residential and commercial buildings in hot and cold water pipelines, underfloor heating systems and drinking water transmission.

● PP-RCT (High temperature resistant β-crystal polypropylene tube)
Raw materials: Optimizing the crystallization method of traditional PP-R, using β crystal instead of the original α-crystal type of PP-R; 

Characteristics: Compared with ordinary PP-R tubes, high temperature resistance is further improved, low temperature brittleness is improved, and creep resistance is enhanced, and service life is longer;

Long-term use temperature: -20℃-95℃;

Use: Widely used in high temperature hot water piping system and high demand industrial piping system.

• FRPP (Glass Fiber Reinforced Polypropylene Tube)

 Raw material: by adding alkali-free glass fiber masterbatch to polypropylene raw material to improve its performance;

Characteristics: Mechanical properties, high temperature resistance has been significantly enhanced, especially the improvement of corrosion resistance, can resist the erosion of most acids, alkalis, salts and organic solvents;

Long-term use temperature: 0℃-90℃; -- Use: Mainly used in chemical production, electroplating, environmental protection industry and other high corrosive and high temperature applications.

 

4. Characteristics of PP pipe:

• Excellent chemical resistance.
• Good wear resistance.
• Lightweight and easy to install.
• Good thermal stability.
• Shock resistance.
• Ageing resistance.

 

In addition, PP pipe also has the advantages of no rust, wear resistance, no scaling, reduce vibration and noise, anti-freezing and anti-condensation, etc., suitable for indoor cold and hot water supply system, heating system and chemical, petroleum, chlor-alkali and other industrial fields. Its installation is simple, long service life, and can be recycled, is an environmentally friendly material .

 

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