**Technical Specifications for PTFE-Lined Piping Systems**
1. **Lining Material**
- **PTFE Type**: Virgin (pure) PTFE or modified PTFE (e.g., TFMTM, PFA for enhanced flexibility).
- **Thickness**: 2–6 mm (customizable based on pipe size and application).
- **Adhesion**: Bonded to pipe substrate using high-temperature sintering or mechanical interlocking techniques.
2. **Operating Conditions**
- **Temperature Range**:
- Standard: **-196°C to +200°C** (-320°F to +392°F).
- Short-term peak: Up to **+260°C** (+500°F) depending on configuration.
- **Pressure Rating**:
- **PN10 to PN40** (CN standard) or **Class 150 to Class 300** (ASME B16.5), depending on backing pipe material and design.
3. **Chemical Resistance**
- Resistant to **all industrial chemicals**, including:
- Acids: Concentrated sulfuric acid, hydrochloric acid, nitric acid, etc.
- Bases: Sodium hydroxide, potassium hydroxide.
- Solvents: Chlorinated hydrocarbons, aromatics, alcohols.
- Gases: Chlorine, hydrogen sulfide.
- **pH Range**: 0–14 (full range).
4. **Mechanical Properties**
- **Surface Smoothness**: Ra ≤ 0.8 μm (prevents fouling and ensures easy cleaning).
- **Abrasion Resistance**: Suitable for slurries with moderate particle content.
- **Vacuum Compatibility**: Suitable for vacuum services up to **0.095 MPa** (full vacuum).
5. **Pipe Dimensions**
- **Size Range**: DN15 to DN600 (½" to 24").
- **Length**: Standard 3m/6m segments, or custom lengths.
- **Backing Pipe Material**: Carbon steel, stainless steel (304/316), or alloy steel.
6. **Connection Types**
- Flanged (CN,ANSI, DIN, JIS standards).
- Threaded (NPT, BSP).
- Butt-welded (for seamless integration).
- Grooved couplings (for quick assembly).
7. **Testing & Certifications**
- **Quality Tests**:
- **Spark Test**: 10 kV DC to detect pinholes in lining.
- **Hydrostatic Pressure Test**: 1.5x design pressure.
- **Dimensional Inspection**: Per ISO 9001/CN/SA-150
8. **Applications**
- Chemical processing, pharmaceuticals, semiconductor manufacturing, power plants, and aggressive fluid transport.
9. **Customization Options**
- Liner thickness, anti-static layers, flangeless designs, insulated jackets, or multi-layer linings (e.g., PTFE+PFA).
