Manufacturer of Pipe Fittings of Rigidly Lined Tetrafluoroethylene Pipes

• Application: Agricultural Irrigation, Chemical Transport, Industrial Processing, Oil and Gas Distribution, Wastewater Management, Water Supply
• certification: Other
• Connection Type: Flanged Joint
• Model NO.: DN50
• Diameter: 2 inch
• Material: PP (Polypropylene)
• Temperature Range: -20℃ to 80℃
• Corrosion Resistance: Tetrafluoroethylene Has Extremely High Chemical St
• Good Sealing: The Pipe Connection Adopts a Special Sealing Struc
• Transport Package: Container
• Specification: DN50
• Trademark: HANYUAN
• Origin: China
• Production Capacity: 1000000000

Product Description

Here's a detailed English technical document for **PTFE-Lined Steel Pipes** (without Chinese translation):

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# **Technical Specification: PTFE (Polytetrafluoroethylene) Lined Steel Pipes**  

## **1. Scope**  
This specification covers the design, material, manufacturing, testing, and certification requirements for **PTFE-lined steel pipes** used in corrosive and high-purity applications.  

## **2. Materials**  
### **2.1 Steel Pipe (Outer Shell)**  
- **Material:** ASTM A106 Gr.B / ASTM A53 Gr.B (carbon steel) or ASTM A312 TP304/316 (stainless steel).  
- **Size Range:** DN15 to DN600 (½" to 24").  
- **Pressure Rating:** SCH40, SCH80, or custom as per design.  

### **2.2 PTFE Lining**  
- **Material:** Virgin **Polytetrafluoroethylene (PTFE)** - ASTM D4894 or D4895.  
- **Thickness:** 2-5 mm (standard), adjustable based on service conditions.  
- **Type:**  
  - **Pressed-in Lining:** For straight pipes.  
  - **Flourinated Ethylene Propylene (FEP) or PFA Adhesive Layer:** For improved bonding.  

## **3. Manufacturing Process**  
1. **Pipe Preparation:**  
   - Steel pipe is cleaned (sandblasted to SA2.5) and inspected.  
2. **PTFE Lining Application:**  
   - PTFE tube is expanded and inserted into the steel shell.  
   - Heat-treated at 300-380°C for sintering.  
3. **End Finishing:**  
   - Flanges (ANSI/ASME B16.5) or butt-welding ends are lined with PTFE overlap.  

## **4. Technical Parameters**  
| **Property**               | **Value**                          |  
|----------------------------|-----------------------------------|  
| **Operating Temperature**   | -20°C to +200°C (short-term 250°C)|  
| **Pressure Rating**        | Up to 16 bar (varies with size)   |  
| **Chemical Resistance**     | Resistant to all acids, bases, solvents except molten alkali metals and fluorine. |  
| **Vacuum Suitability**      | Up to 0.095 MPa (with proper support). |  

## **5. Testing & Inspection**  
- **Non-Destructive Testing (NDT):**  
  - **Spark Test:** 10 kV to detect lining defects.  
  - **Dimensional Check:** Per ASTM D3567.  
- **Pressure Test:** Hydrostatic test at 1.5x design pressure.  
- **Certification:** ISO 9001, EN 10204-3.1B.  

## **6. Applications**  
- Chemical processing (HCl, HSO, Cl).  
- Pharmaceutical (high-purity transfer).  
- Semiconductor industry (ultra-clean systems).  

## **7. Standards Compliance**  
- **ASTM:** D3295 (PTFE tubing), F1545 (lined pipe systems).  
- **ISO:** 9001 (Quality), 14001 (Environmental).  
- **ASME:** B31.3 (Process Piping).  

## **8. Packaging & Marking**  
- Ends capped with plastic covers.  
- Marked with material grade, size, pressure rating, and manufacturer's logo.  

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This document is ready for direct use in international procurement or engineering projects. Let me know if you need additional sections (e.g., installation guidelines, part numbers).