Designed for critical pipe joint integrity, expanded PTFE gasket tape for flange sealing delivers a conformable, creep-resistant seal across raised face, flat face, and glass-lined flanges. Manufactured from 100% virgin PTFE, the PTFE expanded sealing tape features a multidirectional fibril structure that flows into surface imperfections under low bolt load, eliminating leak paths without damaging fragile flanges. As an experienced expanded PTFE tape gasket supplier, we provide rolls in multiple densities, widths, and thicknesses, all backed by batch testing for tensile strength and compressibility. For high-temperature steam, thermal oil, or chemical process lines, the high temperature ePTFE tape grade maintains a stable seal from cryogenic temperatures up to 260°C (500°F), with negligible cold flow and no age hardening.
Core technical specifications of this pipe joint sealing solution are summarized below:
| Parameter | Standard Value | Optional / Custom |
|---|---|---|
| Material | 100% virgin expanded PTFE | Filled grades (glass, silica, barium sulfate) |
| Density | 0.6 g/cm³, 0.8 g/cm³, 1.0 g/cm³ | 0.5 – 1.5 g/cm³ |
| Thickness | 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, 3.0 mm | Up to 5.0 mm |
| Width | 3 mm, 6 mm, 10 mm, 15 mm, 20 mm, 25 mm | Up to 100 mm |
| Temperature range | -240°C to +260°C (-400°F to +500°F) | Short excursions to +315°C (599°F) |
| Pressure rating | Vacuum to 40 bar (580 psi) for standard flanges | Up to 100 bar (1450 psi) with rigid flanges |
| pH range | 0 – 14 | Universal chemical resistance |
| Tensile strength (ASTM D638) | ≥ 10 MPa | ≥ 14 MPa for high-density grades |
| Elongation at break | ≥ 40% | ≥ 60% for low-density grades |
| Compressibility (ASTM F36) | 40 – 60% | Adjustable via density selection |
| Recovery (ASTM F36) | ≥ 15% | ≥ 20% for high-density grades |
| Creep relaxation (ASTM F38) | ≤ 30% | ≤ 20% with high-density material |
Key advantages in service include no curing time, no volatile organic compounds, resistance to weathering and ultraviolet exposure, and compliance with FDA 21 CFR 177.1550 for repeated food contact. The tape is also suitable for oxygen service when cleaned and handled per CGA G-4.1 guidelines.
The ePTFE Tape Seal for Pipe Joint is specifically engineered for on-site fabrication of gaskets on flanges with irregularities, scratches, or surface damage that would cause conventional sheet gaskets to leak. Its self-adhesive backing holds the tape in place during installation on vertical or overhead joints, while the low stress-to-seal requirement protects PTFE-lined, glass-lined, ceramic, and plastic flanges from over-torque damage. The material remains flexible and non-porous across the full operating temperature range, preventing fugitive emissions in cyclic service.
Recommended installation and performance data for the ePTFE Tape Seal for Pipe Joint:
| Application | Recommended Density | Typical Thickness |
|---|---|---|
| Glass-lined or plastic flanges | 0.6 g/cm³ | 1.5 – 3.0 mm |
| Standard steel flanges (PN10–PN40) | 0.8 – 1.0 g/cm³ | 1.0 – 2.0 mm |
| High-pressure steam and thermal oil | 1.2 g/cm³ | 1.0 – 1.5 mm |
| Aggressive chemical service | 1.0 g/cm³ | 1.5 – 2.0 mm |
| Cryogenic systems | 0.8 g/cm³ | 1.0 – 1.5 mm |
The ePTFE Tape Seal for Pipe Joint is supplied in standard roll lengths of 25 m and 50 m, with individual spools shrink-wrapped to prevent contamination. Custom slit widths, filled grades, and pre-cut gasket rings are available on request.
