China PTFE Lined Tower Section Factories, Products
Product Description
Core Overview
PTFE-lined tower sections are specialized composite components designed for critical applications in chemical processing towers, such as absorption, distillation, and extraction columns. Constructed with a robust carbon steel or stainless steel shell and lined with high-purity polytetrafluoroethylene (PTFE), these sections provide an impermeable barrier against aggressive corrosive media. They are engineered to withstand harsh environments involving strong acids, alkalis, and organic solvents, ensuring the integrity of large-scale industrial equipment while maintaining high structural stability under thermal and mechanical stress.
Basic Specifications
| Item | Details |
| Product Name | PTFE (Polytetrafluoroethylene) Lined Tower Section |
| Executive Standards | HG/T 21562, ASME B16.5, GB/T 12224 |
| Nominal Diameter | DN25 – DN300 (1" – 12") |
| Pressure Rating | PN10, PN16, PN25 / Class 150, Class 300 |
| Structure Type | Straight tower section, Tower with side nozzles, Reducing tower section, Tower with manhole |
| Shell Material | Carbon Steel (Q235B, 20#), Stainless Steel (304, 316L) |
| Lining Material | Polytetrafluoroethylene (PTFE) |
| Lining Thickness | 2.0–6.0 mm (Standard: 3.0–4.0 mm) |
| Connection Type | Flanged Connection (RF Raised Face) |
| Standard Height | 500mm / 1000mm / 1500mm / 2000mm (Custom height available) |
| Operating Temperature | -20℃ to +180℃ |
| Applicable Medium | Strong acids, strong alkalis, oxits, organic solvents and other highly corrosive media |
| Factory Inspection | Hydrostatic pressure test, Spark pinhole leakage test (5kV), Lining integrity inspection |
| Main Applications | Chemical reaction towers, distillation towers, absorption towers, washing towers, fluorine chemical industry |
Typical Dimensions Table
| Nominal Diameter DN | Steel Pipe Outer Diameter (mm) | Standard Height (mm) | Flange Outer Diameter (mm) | Bolt Circle Diameter (mm) | Lining Thickness (mm) |
| 25 | 33.7 | 1000 | 115 | 80 | 3.5 |
| 32 | 42.4 | 1000 | 140 | 100 | 3.5 |
| 40 | 48.3 | 1000 | 150 | 110 | 3.5 |
| 50 | 60.3 | 1000 | 165 | 125 | 4.0 |
| 65 | 76.1 | 1000 | 185 | 145 | 4.0 |
| 80 | 88.9 | 1000 | 200 | 160 | 4.0 |
| 100 | 114.3 | 1000 | 220 | 180 | 4.5 |
| 125 | 139.7 | 1000 | 250 | 210 | 4.5 |
| 150 | 168.3 | 1000 | 285 | 240 | 5.0 |
| 200 | 219.1 | 1000 | 340 | 295 | 5.5 |
| 250 | 273.0 | 1000 | 405 | 355 | 6.0 |
| 300 | 323.9 | 1000 | 460 | 410 | 6.0 |
Core Advantages
| Advantage | Description |
| Superior Corrosion Resistance | Offers near-universal chemical resistance, protecting tower structures from rapid degradation by acidic or alkaline process streams. |
| Thermal Stability & Flexibility | The unique lining process accommodates thermal expansion differences between steel and PTFE, preventing delamination during temperature fluctuations. |
| High Mechanical Strength | The steel outer shell provides excellent pressure and vacuum resistance, suitable for tall tower installations with significant static loads. |
| Non-Contaminating Surface | The smooth, non-stick PTFE interior prevents product buildup and fouling, ensuring high purity in pharmaceutical and fine chemical production. |
| Extended Service Life | Combines the durability of steel with the longevity of PTFE, significantly reducing maintenance frequency and total ownership costs. |
Frequently Asked Questions
What media can PTFE-lined tower sections handle?
PTFE-lined tower sections are engineered to withstand virtually all aggressive chemicals, including strong acids (hydrochloric acid, sulfuric acid, nitric acid), strong alkalis, oxidizers, and various organic solvents across demanding processing operations.
What is the standard operating temperature range?
These components operate reliably in temperatures ranging from -20℃ to +180℃, maintaining structural integrity and thermal resistance without delamination between the PTFE lining and the steel shell.
Can custom heights or special configurations be manufactured?
Yes, in addition to standard heights (500mm, 1000mm, 1500mm, 2000mm), customized lengths, reducing sections, manholes, and branch nozzles can be engineered according to plant requirements.
How is the lining quality verified before delivery?
Each section undergoes stringent non-destructive quality tests before dispatch, including a 5kV high-voltage spark pinhole test to guarantee zero micro-porosity, hydrostatic pressure testing, and dimensional inspection.
Which design standards are used for flanges and connections?
The tower sections are designed in compliance with major industrial standards, including ASME B16.5, HG/T 21562, and GB/T 12224, ensuring full compatibility with existing Class 150/300 or PN10–PN25 piping systems.
