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Seamless Steel Pipe Molten Transparent Fluorine Corrosion-Resistant Straight Pipe Cross-Section1
Industrial Pipeline Pipes, Rigid Lining Tetrafluoro Pipe, Chemical Industry
Cangzhou Hanyuan Pipeline Manufacturing Co., Ltd.
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Product Description Here's a detailed English technical document for **PTFE-Lined Steel Pipes** (without Chinese translation):---# **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 (?" 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. ---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).
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