PTFE LINED PIPE

Seamless carbon steel tubes (ASTM A106 Gr.B), internal grit-blasted to Sa2.5, profile 40~80μm.

Fabrication Standards for PTFE-Lined Tubes

 Steel Shell

Seamless carbon steel tubes (ASTM A106 Gr.B), internal grit-blasted to Sa2.5, profile 40~80μm.

Lining Process

Compression Molding: PTFE powder pressed → sintered at 360~380°C → cooling (thickness≥2.5mm)

Winding Sintering: Tape-wound PTFE → step-sintering (CTFE for severe corrosion)

Connection Integrity

Flange faces fully covered, rolled edge R≥4mm (per HG/T 3704)

Quality Verification

Spark test (15kV/mm no leakage), vacuum test (-0.09MPa/30min no collapse)

Performance Advantages

✅ Unmatched Corrosion Resistance: Resists aqua regia, HF, concentrated acids/alkalis, and organic solvents.
✅ Ultra-Pure Surface: Surface tension 18mN/m, USP Class VI compliant for bio-inertness.
✅ Extreme Temperature Range: Continuous service -196°C~+260°C (short-term +300°C).
✅ Low Friction & Wear: Coefficient of friction 0.04~0.07, superior to metal pipelines.

Applications

Chemical Processing: Chlor-alkali units, oxidant transfer, electroplating circulation

Pharma/Biotech: High-purity fluid transfer, vaccine production lines, CIP/SIP systems

Semiconductor: UPW distribution, etchants recovery pipelines

Energy Sector: Geothermal brine transport, FGD slurry lines