The parameters of PPH (homopolymer polypropylene) pipes mainly cover specifications, dimensions, performance indicators, etc. The following is a detailed introduction for you:
Specifications and dimensions
• Nominal outer diameter: Common nominal outer diameter specifications are 20mm, 25mm, 32mm, 40mm, 50mm, 63mm, 75mm, 90mm, 110mm, 125mm, 140mm, 160mm, 180mm, 200mm, 225mm, 250mm, 315mm, 355mm, 400mm, 450mm, 500mm, etc. Different application scenarios will use pipes with different outer diameters.
• Wall thickness: The wall thickness varies according to the outer diameter and pressure level of the pipe. For example, the wall thickness of a PPH pipe with an outer diameter of 20mm may be 2.0mm, 2.3mm, etc.; the wall thickness of a pipe with an outer diameter of 110mm may be 3.2mm, 4.2mm, 5.3mm, etc.
• Length: The standard length is generally 4m or 6m, and can also be customized according to customer needs.
Performance index parameters
Physical properties
• Density: The density of PPH pipes is usually between 0.90-0.91g/cm³, which is relatively light and easy to transport and install.
• Vicat softening temperature: Generally not less than 150ºC, which enables PPH pipes to maintain a certain shape and performance in a high temperature environment and is not easy to soften and deform.
Mechanical properties
• Tensile strength: Usually ≥20MPa, which indicates that PPH pipes have good tensile resistance and can withstand a certain tensile force without breaking during installation and use.
• Elongation at break: Generally ≥500%, which means that the pipe has good ductility when subjected to force and can adapt to deformation to a certain extent without breaking.
• Bending strength: ≥25MPa, to ensure that the pipe will not be easily damaged when subjected to bending force.
Chemical properties
• Chemical corrosion resistance: PPH pipes have excellent corrosion resistance to most inorganic acids, alkalis, and salt solutions. For example, they can be used stably in solutions of a certain concentration of sulfuric acid, hydrochloric acid, sodium hydroxide, etc., but have poor tolerance to strong oxidants and some organic solvents.
Thermal properties
• Thermal expansion coefficient: about (1.0 - 1.2)×10 /K. This value indicates that PPH pipes will expand and contract to a certain extent when the temperature changes. It is necessary to consider reserving expansion space during installation.
• Long-term use temperature: generally -20ºC to 95ºC, and the short-term use temperature can reach 110ºC. Within this temperature range, PPH pipes can maintain good performance.
Pressure level parameters
Common pressure levels for PPH pipes are S5 (0.6MPa), S4 (0.8MPa), S3.2 (1.0MPa), S2.5 (1.25MPa) and S2 (1.6MPa). The higher the pressure level, the more pressure the pipe can withstand.
| Name |
PPH Fittings |
| Model |
PPH-DN110-S5-GB/T |
| Size range |
DN20-500 |
| Pressure range |
1.0/1.6/2.5MPa |
| Body materoal |
RPP.UPVC,CPVC,PVDF,PPH |
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