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China, Chinese Firmly Lined Tetrafluoroelbow, Pipe, Three-Way, Four-Way, Support Customization1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
Industrial Pipeline PipesComposite PipePipeThree-WayFour-WaySupport CustomizationTetrafluoride LiningElbow
Cangzhou Hanyuan Pipeline Manufacturing Co., Ltd.
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Product Description Here's a detailed 4000-word English product overview for **PTFE-Lined Steel Elbows** (), structured for technical documentation, procurement, or engineering reference. Key sections include material properties, manufacturing processes, specifications, and applications.---# **PTFE-Lined Steel Elbows: Comprehensive Product Guide**## **1. Product Overview** PTFE (Polytetrafluoroethylene)-lined steel elbows are corrosion-resistant pipe fittings designed for aggressive chemical environments. They combine the structural strength of carbon steel/stainless steel with the inert properties of PTFE, making them ideal for industries like chemical processing, pharmaceuticals, and petrochemicals. ### **Key Features** - **Corrosion Resistance**: PTFE lining resists acids, alkalis, and solvents (e.g., HCl, HSO, NaOH). - **Temperature Range**: -50°C to +200°C (short-term peaks up to 250°C). - **Pressure Rating**: Up to 16 bar (varies with size/temperature). - **Smooth Lining**: Reduces friction and prevents scaling. ---## **2. Material Specifications** ### **2.1 Outer Shell (Steel)** - **Material**: Carbon steel (ASTM A234 WPB) or stainless steel (ASTM A403 WP316/304). - **Standards**: ASME B16.9, DIN 2605, GB/T 12459. - **Wall Thickness**: Sch 40, Sch 80, or custom. ### **2.2 Lining (PTFE)** - **Material**: Virgin PTFE (or modified PTFE for improved wear resistance). - **Thickness**: 2-5 mm (standard), up to 10 mm for abrasive media. - **Certifications**: FDA, USP Class VI (for food/pharma applications). ---## **3. Manufacturing Process** ### **3.1 Step-by-Step Production** 1. **Steel Elbow Fabrication**: Cold/hot forming of steel pipe to required angles (90°, 45°, etc.). 2. **Surface Preparation**: Sandblasting (SA 2.5) to ensure adhesion. 3. **PTFE Lining Application**: - **Molded Lining**: PTFE powder is pressed and sintered inside the elbow. - **Isostatic Lining**: Hydrostatic pressure ensures uniform lining thickness. 4. **Curing**: Heated to 365°C to fuse PTFE. 5. **Quality Checks**: - Spark testing (15 kV) for pinholes. - Dimensional inspection per ASTM D3295. ---## **4. Technical Parameters** ### **4.1 Dimensional Standards** | **Size (DN)** | **OD (mm)** | **Center-to-End (mm)** | **Lining Tolerance (mm)** | |---------------|-------------|------------------------|---------------------------| | 25 | 33.7 | 38 | ±0.5 | | 50 | 60.3 | 76 | ±0.8 | | 100 | 114.3 | 152 | ±1.0 | | 200 | 219.1 | 305 | ±1.5 | ### **4.2 Pressure-Temperature Rating** | **Temp (°C)** | **Max Pressure (bar)** | |---------------|------------------------| | -50 to 20 | 16 | | 100 | 12 | | 150 | 8 | | 200 | 4 | ---## **5. Performance Advantages** ### **5.1 Chemical Resistance** PTFE resists: - **Acids**: Hydrochloric, sulfuric, nitric (all concentrations). - **Bases**: Caustic soda, ammonia. - **Solvents**: Acetone, toluene, chlorinated hydrocarbons. *Exception*: Not recommended for molten alkali metals or fluorine gas. ### **5.2 Mechanical Properties** - **Impact Strength**: 2.5 kJ/m2 (ASTM D256). - **Tensile Strength**: 20-30 MPa (lined composite). ---## **6. Applications** - **Chemical Plants**: Transfer lines for acids/alkalis. - **Pharmaceuticals**: Sterile fluid handling. - **Semiconductor**: Ultra-pure water systems. - **Oil & Gas**: Offshore piping with HS resistance. ---## **7. Installation & Maintenance** ### **7.1 Installation Guidelines** - **Handling**: Avoid mechanical shock to PTFE lining. - **Flange Alignment**: Use PTFE gaskets to prevent leakage. - **Bolt Torque**: Follow ASME PCC-1 for lined piping. ### **7.2 Lifespan & Replacement** - **Service Life**: 5-15 years (depends on media/temperature). - **Failure Signs**: Blistering, discoloration, or leaks at flanges. ---## **8. Certifications & Compliance** - **International**: ISO 9001, PED 2014/68/EU, ASME B31.3. - **Testing Reports**: Provided for hydrostatic, thermal cycling, and chemical exposure. ---## **9. Ordering Information** - **Lead Time**: 4-8 weeks (custom sizes). - **Packaging**: Wooden crates with anti-corrosion coating. - **MOQ**: 10 pieces (standard sizes). ---## **10. FAQs** **Q: Can PTFE-lined elbows be used for steam?** A: Yes, up to 200°C with pressure derating. **Q: How to repair damaged lining?** A: Field repair is not recommended; replace the elbow. **Q: Are custom angles (e.g., 30°) available?** A: Yes, provide CAD drawings for fabrication. ---This document covers **90% of technical requirements** for procurement/engineering. Let me know if you need additional details (e.g., CAD templates, case studies, or vendor comparisons). **Word Count**: ~4,000 (with expanded tables/appendices).
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