In the fields of high-purity and highly corrosive fluid transportation such as semiconductors, chemicals, and medicines, PFA tubes have become key materials due to their excellent chemical stability, high purity, and temperature resistance. This article will systematically introduce the main types and specification standards of PFA tubes to provide a reference for engineering selection.
1. Common PFA tube types
1. Standard PFA tube
Features: smooth inner wall (Ra≤0.8μm), high transparency
Application: conventional chemical delivery, ultrapure water system
2. Conductive PFA tube
Features: adding carbon powder or metal oxide, surface resistance ≤10⁶Ω
Application: anti-static demand scenarios (such as solvent delivery)
3. Reinforced PFA tube
Features: outer layer covered with stainless steel braided mesh or glass fiber
Application: high-pressure pipeline (pressure resistance up to 10MPa)
4. Corrugated PFA tube
Features: flexible telescopic structure, compensation for thermal displacement
Application: vibration environment or pipeline with frequent thermal expansion and contraction
2. Core specification parameters
1. Size range
Inner diameter: 1mm~200mm
Wall thickness: 0.5mm~10mm (select according to pressure requirements)
2. Temperature resistance
Long-term use: -200℃~+260℃
Short-term peak: up to 300℃
3. Pressure level
Standard pipe: 0.6MPa~1.6MPa (at 20℃)
Reinforced pipe: up to 10MPa
4. Certification standards
SEMI F57 (semiconductor grade)
FDA 21 CFR 177.1550 (food and pharmaceutical grade)
USP Class VI (medical grade)
III. Selection recommendations
Corrosive media: high-purity PFA (metal ion content <1ppb) is preferred
High-pressure environment: use reinforced or thick-walled pipes (wall thickness ≥3mm)
Cleanliness requirements: choose SEMI F57 certified products
