Core Basics: PP FRP Ducting & 2026 Emission Regulation Updates

What Is PP FRP Ducting? Core Material Overview

PP FRP ducting is an engineered composite material that synthesizes the chemical inertness of thermoplastic polypropylene with the structural rigidity of fiberglass-reinforced plastic into a single, high-performance system. At its core is a homogeneous polypropylene (PP) liner — the material that maintains direct, continuous contact with the corrosive or abrasive waste gas stream. Polypropylene is chemically inert across an exceptionally broad pH spectrum, resisting concentrated acids such as sulfuric, hydrochloric, and hydrofluoric acid, as well as strong alkalis and organic solvents. This inherent chemical stability means the liner does not corrode, pit, or degrade when exposed to the aggressive media common in industrial exhaust streams. However, polypropylene alone lacks the tensile strength and rigidity required for large-diameter ductwork operating under negative or positive pressure. This limitation is resolved by the external layer: the PP core is encapsulated in a fiberglass-reinforced plastic (FRP) composite shell, fabricated through filament winding or hand lay-up processes using thermoset resins such as vinyl ester or epoxy. The FRP shell provides immense structural strength, dimensional stability, and impact resistance, allowing PP FRP ducting to maintain its shape under vacuum or pressure loading, span long distances between supports, and withstand physical stresses during installation and operation. The synergy between these two components is what distinguishes PP FRP ducting from either material used independently: the PP liner serves as an impermeable chemical barrier, while the FRP shell acts as the load-bearing skeleton. Furthermore, the composite can be engineered with specific resin systems, glass compositions, and fire-retardant additives to achieve defined performance targets, including ASTM E-84 Class 1 flame-spread ratings and continuous temperature tolerances up to 90–100°C, with intermittent spikes managed through design margins. Unlike metals, PP FRP ducting does not rust, pit, or suffer from galvanic corrosion. Unlike pure thermoplastics, it does not creep or deform under sustained mechanical load. This combination of properties makes it uniquely suited for fabricating complex ducting networks, scrubber housings, and exhaust hoods that must perform reliably for decades in the most hostile industrial environments. For detailed fabrication specifications and engineering data, leading manufacturers maintain extensive technical libraries, such as those available at https://plastic-duct.com/.

Key Mandatory Changes in 2026 Industrial Emission Rules

The regulatory horizon for 2026 is defined by several converging trends that collectively elevate the compliance bar far beyond historical norms. First, pollutant concentration limits are being reduced across the board. China’s revised GB 3095—2026 standard, for example, lowers the PM2.5 annual average secondary limit from 35 μg/m³ to 25 μg/m³ and the daily average from 75 μg/m³ to 50 μg/m³, while also tightening limits for SO₂ and NOₓ . The European Union’s updated BAT conclusions similarly reduce allowable emission levels for volatile organic compounds (VOCs), hazardous air pollutants (HAPs), and heavy metals by 20–40% in many industrial sectors. Second, and perhaps more transformative for ducting system design, is the aggressive expansion of Leak Detection and Repair (LDAR) programs. Historically focused on valves, pumps, and flanges, the 2026 rules extend stringent LDAR protocols to ducting systems — particularly those conveying hazardous or corrosive waste gases. This mandates regular monitoring using Optical Gas Imaging (OGI) technology, with extremely low thresholds for what constitutes a reportable “leak.” A minute fugitive emission from a corroded seam or a degraded gasket, previously overlooked, could now trigger substantial fines and mandatory corrective action. Third, regulations are increasingly adopting a “continuous compliance” model that replaces periodic stack testing with year-round performance verification. China’s updated standard, for instance, requires automatic monitoring equipment to operate continuously throughout the year, with pollutant data meeting strict statistical validity requirements — PM2.5 and PM10 annual averages must be based on at least 324 daily mean values . This places a premium on infrastructure reliability: any ducting failure that forces system shutdown disrupts the continuous capture and treatment of emissions, creating a compliance gap. The following table summarizes the critical shift in compliance focus:

Why Traditional Ducting Fails New Waste Gas Compliance Standards

Traditional ducting materials — primarily metals such as carbon steel, stainless steel (304/316 grades), and high-nickel alloys — are fundamentally misaligned with the demands of the 2026 regulatory landscape. Carbon steel, while inexpensive and structurally strong, is catastrophically vulnerable to corrosion from acidic or caustic waste gases. Even when protected with internal coatings or rubber linings, these protective layers are prone to chipping, cracking, and delamination, exposing the underlying metal to rapid degradation and inevitable perforation. Stainless steel offers improved corrosion resistance but remains susceptible to pitting corrosion and stress corrosion cracking in the presence of chlorides — compounds ubiquitous in chemical processing, semiconductor manufacturing, and waste incineration exhaust streams. High-nickel alloys such as Hastelloy solve the corrosion problem but at capital costs five to ten times that of equivalent PP FRP ducting, making them economically prohibitive for the large-diameter, sprawling duct networks typical of modern industrial facilities. Beyond material degradation, metal ducting systems harbor a critical structural flaw: the joints. Metal systems rely on flanged connections sealed with gaskets — elastomeric or PTFE components that degrade over time due to chemical attack, thermal cycling, and mechanical vibration. As gaskets shrink, harden, or crack, they create precisely the fugitive emission pathways that expanded 2026 LDAR programs are designed to detect and penalize. Moreover, when a section of metal duct corrodes, repair or replacement requires system shutdown, cutting torches, welding crews, and often days of downtime. In the context of continuous compliance requirements, this maintenance burden is untenable. A ducting system that is inherently prone to developing leaks, demands frequent and disruptive maintenance, and offers an unpredictable service life is not merely an operational inconvenience — it is a direct regulatory liability that undermines the goal of sustained, verifiable environmental performance. Understanding the full scope of corrosion mechanisms in industrial ducting helps engineers appreciate why material selection has become a frontline compliance decision under the 2026 framework.

How PP FRP Ducting Enables Full Compliance with 2026 Regulations

Corrosion Resistance for Safe Handling of Corrosive Waste Gas

The cornerstone of PP FRP ducting’s compliance advantage is its unparalleled corrosion resistance. The homogeneous polypropylene liner is a monolithic barrier, unaffected by the vast majority of chemical agents found in industrial waste streams, including concentrated sulfuric acid, hydrochloric acid, sodium hydroxide, and chlorinated solvents. Critically, this is not a coating that can be breached — it is the structural material itself. Unlike metals, which corrode through electrochemical processes that progressively weaken the entire material cross-section, PP FRP ducting’s failure mode is fundamentally different and far less catastrophic. Even in the extremely unlikely event of a liner breach, the FRP structural layer provides a secondary containment barrier, buying time for detection and repair before any fugitive emission reaches the external environment. This corrosion resistance is consistent across the entire duct surface, including at bends, transitions, and complex geometries where turbulent flow often accelerates metal corrosion. For the 2026 regulations, this consistency is transformative: it means the duct’s wall thickness and structural integrity remain predictable and verifiable over decades of service, eliminating the gradual thinning that leads to sudden, catastrophic leaks in metal systems. The inertness of PP FRP ducting also prevents the duct itself from becoming a contamination source — no iron oxides (rust) mixing into the gas stream, no metallic leachates interfering with downstream treatment processes or sensitive monitoring equipment. By selecting a material impervious to chemical attack, facilities effectively eliminate corrosion as a variable in their long-term compliance strategy, ensuring that the first line of defense — the duct — remains intact and functional throughout its service life. Research published by NACE International (AMPP) consistently demonstrates that composite thermoplastic-lined systems outperform metallic alternatives in acid-gas and chloride-rich environments by orders of magnitude in terms of service life and integrity retention.

Leak-Tight Sealing to Eliminate Fugitive Emission Leaks

Addressing the fugitive emission mandates embedded in 2026 LDAR expansions requires a paradigm shift in ducting assembly methodology. PP FRP ducting systems are designed for fusion welding — a technique in which specialized hot-air welding equipment melts the polypropylene of both the duct section and the adjoining component together, creating a homogeneous, seamless bond. This weld is as chemically resistant and structurally strong as the parent material itself, effectively creating a single, continuous piece of duct from the emission source to the treatment system inlet. This technique eliminates the need for the dozens or hundreds of mechanical gasketed flanges required in a comparable metal duct network. Each eliminated flange is a potential fugitive emission pathway removed from the compliance equation. The result is a hermetically sealed conveyance system that meets the spirit and letter of even the most aggressive LDAR programs. When an Optical Gas Imaging camera scans a properly installed PP FRP ducting network, it reveals no thermal plumes — because there are no joints to leak. Furthermore, the dimensional stability of the polypropylene material ensures that welded joints do not develop stress fractures over time due to thermal expansion and contraction, a common failure mechanism in rigid metal systems subjected to process temperature swings. This inherent leak-tightness provides facility managers with immense confidence during regulatory inspections and transforms the ducting system from a compliance vulnerability into a verifiable, documented asset. The U.S. EPA’s LDAR guidance underscores that the most effective path to fugitive emission reduction is eliminating leak points at the design stage — precisely the philosophy that fusion-welded PP FRP ducting embodies. For technical guidance on welding standards, joint design, and quality assurance procedures, engineering resources such as those at https://plastic-duct.com/ provide valuable reference material.

Long-Term Durability to Sustain Continuous Compliance Requirements

The concept of continuous compliance, now central to 2026 regulatory frameworks, demands infrastructure that does not degrade — systems that perform as designed on day one and continue performing identically on day ten thousand. PP FRP ducting excels in this regard due to its exceptional long-term durability across multiple dimensions. The material is immune to atmospheric corrosion, meaning external factors such as humidity, salt air, or aggressive plant atmospheres do not degrade the duct’s exterior surface. The FRP shell, when properly formulated with UV-resistant surface veils, withstands prolonged sun exposure without embrittlement, and it resists physical impacts and abrasion far better than unprotected metal. This robustness translates to a typical service life exceeding 25–30 years with minimal maintenance intervention — a lifespan that dwarfs the 10–15 year replacement cycle common for metal ducting in corrosive service environments. Unlike metal systems, which may require repainting, re-coating, gasket replacement, or patch welding every three to five years, a PP FRP ducting system is largely install-and-forget. This dramatically reduces lifetime maintenance burden and, critically, eliminates the frequent system shutdowns associated with traditional duct repairs. For continuous compliance, this operational uptime is essential: a plant cannot credibly claim continuous capture and treatment of waste gas if its ductwork is regularly offline for corrosion repair or joint re-sealing. The durability of PP FRP ducting ensures the system remains operational, maintaining the capture efficiency that the entire pollution control train depends upon. This long, predictable service life also aligns with the life-cycle analysis and sustainability considerations increasingly factored into regulatory approvals and corporate Environmental, Social, and Governance (ESG) reporting, positioning PP FRP ducting as both a financially and environmentally sound long-term investment.

Practical Implementation: PP FRP Ducting for Compliance Success

Industry-Specific Solutions for Different Waste Gas Treatment Scenarios

The versatility of PP FRP ducting allows it to be precisely engineered for virtually any industrial application involving corrosive, toxic, or hazardous waste gas conveyance. In chemical and pharmaceutical manufacturing, where complex mixtures of VOCs, acid gases, and reactive solvents are generated by reactors, distillation columns, and storage tank vents, PP FRP ducting provides reliable conveyance to central scrubber systems, withstanding the unpredictable “upset” conditions that can produce sudden spikes in concentration or temperature. For the semiconductor and electronics industry, which relies on aggressive etching gases such as HCl, HF, Cl₂, and NF₃, the absolute chemical inertness of the PP liner is non-negotiable — even trace duct corrosion could generate dangerous secondary reaction products or contaminate ultra-clean production environments. Metal finishing and electroplating operations deploy PP FRP ducting to handle chromic acid mist, cyanide fumes, and mixed acid vapors, conditions under which metal ducts would fail within months. Waste-to-energy and municipal incineration plants rely on PP FRP for flue gas conveyance upstream of desulfurization (FGD) systems, where the combination of elevated temperatures, abrasive particulates, and aggressive acid gases (SO₂, HCl, HF) creates a hostile environment that defeats conventional materials. In pulp and paper mills, PP FRP ducting handles chlorine dioxide and other bleaching chemical fumes that rapidly corrode stainless steel. Across all these sectors, the system is not a generic, off-the-shelf product — it is custom-engineered. Duct diameters, wall thicknesses, support spans, reinforcement schedules, and resin formulations are all calculated based on the specific gas composition, flow velocity, temperature profile, and pressure conditions of each application, ensuring optimal performance and regulatory compliance from commissioning through end-of-life. The International Association of Plumbing and Mechanical Officials (IAPMO) and similar standards bodies provide frameworks for composite material specification that guide engineers in matching PP FRP ducting configurations to application-specific demands.

Installation & Maintenance Best Practices to Sustain Compliance

Maximizing the longevity and leak-proof integrity of a PP FRP ducting system hinges on adherence to rigorous best practices during both installation and ongoing operation. Installation must be performed by trained and certified crews using validated welding procedures. This includes meticulous surface preparation, precise temperature and speed control during hot-air fusion welding, and the use of compatible materials for all ancillary components such as supports, expansion joints, and penetration seals. The duct must be supported at calculated intervals to prevent sagging or undue stress, with generous use of expansion loops or flexible connectors to accommodate thermal movement — especially critical in processes with wide temperature swings between operating and shutdown conditions. Post-installation, a comprehensive quality assurance program should include visual inspection of every weld, and where warranted, spark testing or pressure testing to verify seal integrity before the system is placed in service. Once operational, maintenance is minimal but disciplined: periodic visual inspections for external damage or UV degradation, verification of support integrity and anchor bolt tightness, and — most critically — ensuring that any penetrations made after initial installation for new vents, sample ports, or instrumentation taps are properly sealed using the same fusion welding standards as the original construction. A simple, well-maintained log documenting these inspections satisfies a key requirement of 2026 continuous compliance frameworks: demonstrating proactive stewardship and verifiable system integrity through documented evidence . This low-maintenance profile represents a major operational cost advantage compared to the constant repainting, re-gasketing, and patch repairs that metal systems demand. Detailed installation guides and maintenance protocols are available from specialized manufacturers at https://plastic-duct.com/, offering step-by-step procedures that align with international quality assurance standards such as ISO 9001.

Cost-Benefit Analysis of PP FRP Ducting for Long-Term Compliance

Evaluating PP FRP ducting purely on initial capital cost can be misleading; a total cost of ownership (TCO) analysis reveals its true economic advantage. The upfront material and fabrication cost of PP FRP ducting is typically higher than carbon steel and competitive with — or slightly below — high-grade stainless steel. However, the initial cost comparison is where the similarity ends. Installation costs for PP FRP ducting are often lower due to its lighter weight (reducing structural support requirements) and the speed of hot-air fusion welding compared to metal flanging, bolting, and gasketing. The dramatic savings emerge over the system’s operational life:

When these factors are quantified and discounted to present value, PP FRP ducting consistently demonstrates a lower total cost of ownership across any analysis period exceeding five years. The investment is not merely in ducting material — it is in operational certainty, regulatory peace of mind, and sustainable plant operation that aligns with both 2026 compliance mandates and long-term corporate sustainability objectives. For global industries facing the most stringent emission regulations in history, PP FRP ducting represents not just a technically superior solution, but a strategically sound financial decision.

Each material exhibits unique physical and chemical properties. A mismatch between material properties and environmental requirements can lead to catastrophic system failures or skyrocketing maintenance costs. This guide provides a comprehensive technical comparison to help global procurement and engineering teams make data-driven decisions. Many global industry leaders trust our high-performance thermoplastic solutions for harsh industrial environments.https://plastic-duct.com/The precision engineering duct system provided.

Core Performance Comparison of PP, PVC, Galvanized Iron & PE Ducts

Fundamental Material Properties & Core Performance Metrics

To deeply understand the performance differences of these materials, it is essential to first examine their molecular structure and physical basis. PP duct is a semi-crystalline thermoplastic known for its excellent chemical neutrality and low density (approximately 0.90 to 0.91 g/cm³). According to…Engineering ToolBox: Research on Polymer DensityIt is one of the lightest and most structurally robust plastic options currently available for commercial applications.

In contrast, while PVC is slightly rigid at room temperature, its reliance on stabilizers and plasticizers makes it susceptible to leaching or chemical corrosion over time. Galvanized iron (GI) represents the traditional metallic standard; although it offers great structural rigidity and mechanical strength, it still suffers from unavoidable oxidation vulnerability under the zinc coating. While PE (especially high-density polyethylene, HDPE) provides excellent flexibility and impact resistance, it lacks the structural “memory” and heat resistance required for many elevated industrial exhaust applications. When comprehensively evaluating these fundamental indicators, PP ducts consistently remain the most balanced “all-rounder” in complex chemical environments.

Temperature Resistance & Environmental Adaptability Gap

Temperature is a major dividing line in material selection. Standard PP ducts are designed to maintain structural integrity under a continuous operating temperature of 95°C (203°F). However, according to…Experimental data from the International Journal of ThermophysicsPolypropylene outperforms most inexpensive plastics in thermal cycling environments.

In contrast, PVC begins to soften significantly and lose its rated pressure once the temperature exceeds 60°C (140°F), making it unsuitable for transporting high-temperature chemical or industrial steam. While galvanized iron can technically withstand higher temperatures (typically exceeding 200°C), its zinc coating peels or oxidizes rapidly in hot, humid environments. PE ducts are at the lower end of the thermal spectrum, typically with an upper limit of 60°C, which often limits their applications to underground drainage rather than high-temperature overhead ventilation.

Corrosion Resistance & Operational Stability Comparison

Corrosion is the “silent killer” of industrial ventilation systems. In this category, PP ducts are the undisputed champion. Because it is a non-polar hydrocarbon polymer, it is virtually unaffected by various acids, alkalis, and organic solvents. (Reference)NACE International Research Report on Material CorrosionThe loss rate of non-metallic materials when treating acidic waste gas is much lower than that of coated metals.

While PVC offers good resistance to many acids, it is susceptible to corrosion from certain polar solvents and esters. Galvanized iron performs well in clean-air HVAC environments, but rapidly deteriorates upon exposure to acidic fumes or high humidity; its zinc coating is chemically consumed, leading to “white rust” and ultimately structural perforation. PE has similar chemical resistance to PP, but is more prone to environmental stress cracking upon contact with certain industrial surfactants. For exhaust gas treatment equipment handling volatile chemical mixtures , high-grade PP systems offer unparalleled operational stability.

Cost, Service Life & Total Ownership Cost Analysis

Upfront Material & Installation Cost Contrast

When considering costs, it’s crucial to distinguish between the price of raw materials and “installation costs.” Galvanized iron typically boasts the lowest raw material cost per foot, but its immense weight necessitates heavy-duty support structures and time-consuming mechanical connections, significantly increasing installation expenses. PVC is inexpensive and offers simple solvent-bonded connections, but welding remains essential for large industrial pipe diameters.

PP duct systems are priced in the mid-to-high range, primarily due to the specialized equipment and skilled labor required for hot air welding or butt welding. However, according to…Installation efficiency study by MCAA (American Mechanical Contractors Association)Since PP is much lighter than GI (typically only 1/8 the weight), the savings in structural reinforcement and installation time often offset the material premium. PE is generally the most economical plastic, but due to its flexibility, it usually requires denser bracing, which increases overall installation labor costs.

Service Life & Durability Difference Across 4 Duct Materials

The lifespan of a ventilation system directly reflects its environmental adaptability. In standard laboratories or chemical treatment plants, PP duct systems are typically engineered for a 50-year lifespan. Because PVC materials become brittle under UV exposure or chemical leaching, the reliability of such systems usually begins to decline after 20 to 30 years.

Galvanized iron may have a lifespan of only 5 to 10 years in corrosive environments, after which it will require large-scale replacement due to corrosion. PE systems have strong resistance to physical impact and a lifespan of over 40 years, but due to limitations in thermal performance, their application scenarios are narrower than PP. For the global market, investing in PP ductwork is essentially a “one-time installation, worry-free for life” strategy.

Long-Term Maintenance & Total Cost of Ownership (TCO) Comparison

Total cost of ownership (TCO) is key to demonstrating the economic superiority of PP ducts . Metal GI systems require frequent rust checks, periodic repainting, and eventual replacement of corroded sections, costs that can exceed the initial installation price within ten years.

PP ducts , with their integral welded joints and inherent corrosion resistance, require virtually no structural maintenance. The smooth inner wall also prevents the accumulation of chemical condensates or particles, reducing the frequency of internal cleaning.Total Cost of Ownership Comprehensive Analysis ModelAccording to assessments, over a 25-year period, the total cost of ownership (TCO) of PP systems is typically 40% to 60% lower than that of galvanized iron.

Application Scenarios & Optimal Material Selection Guide

Industry-Specific Best Fit Applications for Each Duct Type

Choosing the right material depends on “mission fit.” PP ducts are the gold standard for semiconductor wafer fabs, heavy chemical synthesis facilities, and large-scale industrial wastewater treatment plants (handling high-temperature acidic vapors). PVC is commonly found in residential HVAC, swimming pool ventilation, and laboratories in room-temperature environments. Galvanized iron remains the preferred choice for commercial office buildings with high fire safety requirements and no corrosion concerns. PE ducts are ideal for underground hazardous waste ventilation and mining applications.

Regulatory Compliance & Application Limitations of Each Material

conform toFM Global 4910 (Fire Resistance Testing Standard for Cleanroom Materials)The choice of materials is often determined by UL 94 standards. Standard PP and PE are flammable, so flame-retardant modified versions (PPs) must be used in indoor building applications. Although PVC is naturally flame-retardant, the toxic hydrogen chloride gas released during combustion poses a significant legal liability in some jurisdictions. While galvanized iron is non-combustible, it may fail to meet clean air standards due to peeling in corrosive environments.

Quick Decision Guide: Which Duct Material Fits Your Project Best

If your project involves temperatures above 60°C and high concentrations of corrosive fumes, PP ducts are the only long-term viable option. If the budget is extremely limited and the environment is low-temperature and low-corrosion, PVC is acceptable. For heavy industrial machinery environments with no chemical exposure, galvanized iron is a reliable and cost-effective solution. To explore specialized solutions tailored to these needs, please visit [website address].https://plastic-duct.com/Our team of experts will find the perfect match for your facility.

Final Thoughts on PP Duct Selection & Implementation

In the global industrial waste gas treatment field, the choice of materials directly affects the success or failure of a project. PP ducts , with their superior performance in extreme chemical resistance, thermal stability, and long-term economic efficiency, have become the preferred choice for engineers worldwide treating acidic and alkaline waste gases. By comparing PVC, GI, and PE, we can clearly see the significant advantage of PP in terms of total life-cycle cost.

If you would like to learn more about how to optimize duct layout for specific chemical compositions, or if you need technical charts of the thermal expansion rates of different duct materials , we can provide you with more in-depth consulting services.

PP plastic air duct

Advantages of PP plastic air duct:

• Corrosion resistance: PP plastic air duct has good corrosion resistance to various chemical substances and corrosive gases, and is suitable for humid environments and places with more corrosive gases.
• Lightweight and easy to install: Compared with galvanized air ducts, PP plastic air ducts are lighter and easier to carry and install. It adopts splicing connection without welding and fixing, and the installation is simple and efficient.
• Insulation performance: PP plastic air duct has good insulation performance and is non-conductive. It is suitable for occasions that need to avoid static electricity accumulation or reduce heat loss.
• Energy saving: Due to the lower thermal conductivity, PP plastic air ducts have less heat transfer loss than galvanized air ducts, providing higher energy efficiency, saving energy and reducing operating costs.
• Long-term reliability: PP plastic air ducts are corrosion-resistant, rust-free, have a long service life, and are not affected by the growth of mold, fungus, and microorganisms.

Disadvantages of PP plastic duct:

• Temperature limitation: PP plastic ducts are weak in high temperature environment, may be deformed or melted, and are not suitable for high temperature discharge.
• Lower mechanical strength: Compared with galvanized air ducts, PP plastic air ducts have lower mechanical strength and are susceptible to physical damage.

Applicable scene:

• Corrosive gas discharge: PP plastic air duct is very suitable for corrosive gas discharge places such as chemical industry and acid and alkali plants.
• Ventilation and air conditioning system: PP plastic ducts can be widely used in commercial buildings, hospitals, laboratories and other places that require ventilation and air conditioning systems.
• Places with high environmental protection requirements: Since PP plastic air ducts do not emit harmful substances such as lead and cadmium, they are suitable for places with high environmental protection requirements, such as food processing factories, pharmaceutical factories, etc.

Galvanized air duct

Advantages of galvanized air duct:

• High temperature resistance: Galvanized air ducts can maintain structural stability and durability in high temperature environments, and are suitable for high temperature discharge occasions.
• Higher mechanical strength: Compared with PP plastic air duct, galvanized air duct has higher mechanical strength and can resist certain physical impact and pressure.
• Wear resistance: The surface of the galvanized air duct is covered with a zinc layer, which has good wear resistance and can adapt to harsh working environments.

Disadvantages of galvanized air duct:

• Corrosion risk: Galvanized air ducts may have the risk of zinc layer corrosion or rust after long-term use, especially in humid or corrosive gas environments.
• Complicated installation: Galvanized air ducts need to be welded and fixed, and the installation process is relatively complicated, requiring more time and labor costs.

Applicable scene:

• High-temperature environment: Galvanized air ducts are suitable for industrial places that need to discharge high-temperature gases, such as metallurgy, boilers, etc.
• Places with high mechanical impact: The high mechanical strength of galvanized air duct makes it suitable for environments that need to withstand mechanical impact, such as factory workshops, mining sites, etc.

PP plastic air ducts and galvanized air ducts have their own advantages and applicable scenarios in different aspects. PP plastic air duct is suitable for corrosive gas discharge, ventilation and air conditioning systems and places with high environmental requirements. The galvanized air duct is suitable for high temperature environments and places requiring higher mechanical strength. When selecting the material of the air duct, it should be comprehensively considered according to the specific working environment, corrosion resistance, mechanical strength and temperature requirements, so as to ensure that the most suitable material for the air duct is selected to meet the requirements of the air duct.