Product Overview

PPH air ducts are corrosion-resistant, high-temperature resistant, lightweight, and high-strength ventilation ducts made from β-modified PPH resin through extrusion or sheet welding. In recent years, they have rapidly replaced traditional metal ducts in fields such as chemical engineering, environmental protection, new energy, and building ventilation.

Materials and Properties

Typical	values/characteristics of the project
Material	β-crystalline homopolymer polypropylene (β-PPH), crystallinity >70%.
Temperature range	-20℃ to +110℃ (long-term), short-term 120℃
Corrosion resistant	pH 1-14, acids, bases, salts, NMP, chloride ions, sulfides
Flame retardant rating	HB→V-2 (can be increased to V-0 by adding environmentally friendly flame retardant masterbatch)
Inner wall roughness	0.2-0.3 µm, with 15% lower wind resistance than steel plate.
Service life	50 years (indoor rated temperature and pressure)

Connection method

Method	Applicable Diameter	Key Process Parameters	Scenarios and Advantages
Hot melt welding	DN50-1200	Heating plate 195-205 ℃, 1 mm flange, cooling ≥30 min	For high-voltage systems, weld strength ≥ base metal strength
Electrofused saddle	Main hole opening	Built-in resistance wire, automatically completes the process within 90-180 seconds after being energized.	Air-operated tapping, no production stoppage required
Flange Flanging	Connect to towers, valves, and pumps	Pipe end hot melt flange + loose steel flange, EPDM gasket	Removable, allows ±5° angle compensation
Groove clamps	≥DN300	The groove depth is 1.5 mm, and it is locked with stainless steel clamps.	Earthquake-resistant and quick-installation, suitable for elevated factory buildings
Hot air welding	Panel joints	Welding torch 340 ℃, electrode φ3 mm, speed 1.2 m/min	On-site fabrication of reducers and elbows

Application Areas

New Energy and High-Tech Manufacturing

Lithium Batteries & New Energy: Suitable for critical processes such as hydrogen energy medium transportation and photovoltaic coolant circulation.
Semiconductors: Used for transporting high-purity ultrapure water, specialty gases, electrolytes, slurries, and other corrosive or high-purity media, meeting cleanliness and precision requirements.

Pharmaceuticals & Specialty Chemicals

Pharmaceutical Industry: Specifically designed for transporting pharmaceutical raw materials, liquids, purified water, etc., featuring non-toxicity, no leaching, easy cleaning, and resistance to microbial growth, meeting stringent hygiene standards. Flame-retardant conductive pipes enable safe emission of hazardous gases and effectively reduce electrostatic dust adsorption.
Chemicals & Surface Treatment: With its excellent high-pressure resistance, corrosion resistance, and high-temperature resistance, the product is widely used in pickling processes in various chemical processes, power energy, steel mills, and automobile manufacturing industries.

Environmental Protection & Public Facilities

Textile Printing & Dyeing & Wastewater Treatment: Suitable for the entire process of collecting, transporting, and treating domestic sewage and industrial wastewater. Its resistance to acid and alkali corrosion, aging resistance, and excellent sealing performance allow it to reliably handle complex working conditions such as underground installations.
Air purification and built environment: Used for the effective collection and treatment of acidic, alkaline, or dust-laden waste gases generated in industrial production. It is also widely used in building ventilation systems to achieve efficient air exchange, reduce energy loss, and improve indoor air quality.

Heavy industry and resource extraction

Mining and metallurgy: Suitable for conveying slurry, smelting slag, industrial cooling water, and various raw materials. It can reliably operate in the humid, high-impurity environments of underground mines and the high-temperature, harsh conditions of smelters.

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