PTFE SS304 Pipes and duct 304 stainless steel surface PTFE sprayed air duct straight duct 90° gored elbow

PTFE SS304 Pipes and duct 304 stainless steel surface PTFE sprayed air duct straight duct 90° gored elbow 

mainly for Electronics Industry / Semiconductor Industry 

Teflon-coated 304 stainless steel ductwork consists of 304 stainless steel ducts with a Teflon (polytetrafluoroethylene, PTFE) coating applied to the interior (or both interior and exterior) surfaces via a specialized spraying process. Designed for demanding operating conditions, this product serves as an enhanced, protective upgrade to standard stainless steel ductwork, offering a long-lasting, low-maintenance solution for ventilation environments characterized by corrosive substances, high temperatures, or stringent cleanliness requirements.

🛡️ Core Product Structure:

‌Substrate‌: Fabricated from food-grade or industrial-grade 304 stainless steel sheets using full argon-arc welding. Available in wall thicknesses ranging from 0.5 mm to 3.0 mm, these ducts can be manufactured in various cross-sectional shapes—such as circular or rectangular—and are compatible with standard fittings, including flanges, reducers, and tees. The structure offers high mechanical strength and excellent airtightness, capable of withstanding pressures up to -9000 Pa.

‌Coating‌: The stainless steel surface undergoes sandblasting for roughening and interface activation, followed by the application of a Teflon coating (250 μm + 50 μm thick). Options include various fluororesins such as PTFE, ECTFE, or PFA. The coating features superior adhesion and is entirely free of pinholes—verified through 100% inspection using 250 kV spark testing—ensuring complete coverage of vulnerable, corrosion-prone areas like weld seams.

✨ Key Performance Advantages:

‌Exceptional Corrosion Resistance‌: Highly resistant to the vast majority of strong acids, strong bases, and organic solvents. This effectively addresses the susceptibility of standard 304 stainless steel ducts to pitting corrosion when exposed to chloride ions or hydrogen fluoride, extending the service life from less than 18 months to over 5 years in highly corrosive exhaust environments.

‌Superior Non-Stick & Low-Resistance Properties‌: The coating’s extremely low surface energy prevents the adhesion of oil, dust, and sticky substances, creating a "self-cleaning" effect. This significantly reduces airflow resistance along the duct walls, lowers energy consumption for ventilation fans, and decreases the workload for routine maintenance and cleaning by more than 70%. Wide-Range Temperature Stability: Capable of long-term, stable operation across an ultra-wide temperature range of -190°C to +260°C. Certain modified coatings can withstand instantaneous temperatures of up to 350°C, making them suitable for extreme operating conditions, such as high-temperature flue gases or low-temperature corrosive gases.

High Purity and Zero Outgassing: The coating is dense and non-porous, with no release of harmful substances. It resists the growth of bacteria and mold, fully meeting the stringent cleanliness and ventilation requirements for food processing facilities and pharmaceutical GMP-compliant cleanrooms, thereby preventing cross-contamination.

🏭 Key Application Scenarios:

Chemical Industry and Laboratory Ventilation: Exhaust ductwork for transporting highly corrosive gases, including hydrochloric acid, sulfuric acid, and volatile organic compounds (VOCs).

Semiconductor, Electronics, and Photovoltaic Industries: Handling corrosive process exhaust gases; compliant with the strict cleanliness standards required for cleanroom ventilation.

Food and Pharmaceutical Sectors: Ventilation systems for commercial kitchen exhaust, baking line emissions, and sterile cleanroom air supply/exhaust—preventing the accumulation of grease and microbial contamination.

Industrial Manufacturing: Exhaust systems for acid mists in electroplating and pickling workshops, solvent-laden exhaust from paint booths, and the transport of high-temperature flue gases from heat-treatment furnaces.

part of our customers :

BASF.

SINOPEC.

Clariant Catalyst (Shanghai) Co., Ltd

Ounuofa Chemical (Shanghai) Co., Ltd

Foxconn Group

Kajue Trading (Iran)

TeYou Powder Equipment (Shanghai) Trading Co., Ltd

Zhuangxin Wanfeng (Shanghai) Chemical Co., Ltd

Foshan Alco Industrial Equipment Manufacturing Co., Ltd

Jerry Oil and Gas Engineering Co., Ltd

Taiwan Chlor Alkali Industry Co., Ltd

Jerry Oil and Gas Engineering Co., Ltd

Nimir Industrial Chemical

Trimex world 

ENGRO POLYMER AND CHEMICALS LTD

Arvand Petrochemical Company Ltd 

Shi Baft Petrochemical Company Ltd

Shandong Electric Power Construction

Indonesia Golden Eagle Group

Russian Nakhodka Mineral Fertilizer Plant 

We are a group company :

Shanghai Teflon Anti-Corrosion Equipment Co., Ltd，

Shanghai Anti Corrosive Valve Group ,

Jiangsu Teflon Anti-Corrosion Equipment Company ，

Huakai Anti-Corrosion Equipment Technology Co., Ltd ,

Product Tags: PTFE SS304 Pipes , PTFE SS304 Duct , PTFE SS304 Pipe Line