PTFE Lined Chemical Conveying Pipeline

PTFE Lined Chemical Conveying Pipeline serves as the fluid-transport backbone for corrosive chemical production lines, distinctly different from reaction vessels, storage tanks and separation towers. Ordinary carbon-steel pipes will suffer rapid corrosion when carrying aggressive chemicals; plastic pipes cannot withstand high-temperature working conditions. This lined pipeline combines the mechanical strength of carbon-steel outer tube and the chemical inertness of PTFE inner layer. Each straight pipe, elbow, tee and reducer forms a complete closed conveying network, realizing safe delivery of high-temperature corrosive medium between reactors, storage tanks, rectification columns and other process equipment. Widely applied in overseas chemical parks for closed-loop corrosive-medium circulation and material transfer.

What is PTFE Lined Chemical Conveying Pipeline

PTFE Lined Chemical Conveying Pipeline is modular anti-corrosion pipe assembly composed of carbon-steel outer pipe and seamless vacuum-laminated PTFE inner liner. The outer carbon-steel pipe bears pipeline system pressure, external impact and installation load. The thin yet dense PTFE liner is tightly bonded to inner pipe wall, isolating corrosive flowing medium from metal substrate. The complete conveying system is assembled by straight pipe sections plus supporting lined elbows, tees, reducers and flanged joints. It is exclusively used for continuous liquid or slurry chemical medium transportation, not for reaction, storage or gas-liquid separation. All flange inner surfaces and transition corners are fully wrapped by PTFE material to eliminate metal-exposed corrosion dead-spots.

Complete Technical Specification Table

Core Product Advantages

1. Dual-Material Composite Structure Balances Strength And Anti-Corrosion

Carbon-steel outer pipe guarantees pressure-bearing and anti-impact performance; seamless PTFE liner resists most acid, alkali and fluorine-containing flowing media, outperforming pure plastic pipe under high-temperature and pressure conditions.

2. Zero-Dead-Spot Full-Lined Transition Joints

Pipe inner bores, flanges and welding transition positions achieve continuous PTFE covering. No bare metal exists at connection points to avoid local crevice corrosion frequently seen on cheap lined piping.

3. Adapt To Complex Field Layout Requirements

Modular segmented straight-pipe design. Single pipe length can be customized, freely combined with elbows, tees and reducers to adapt complex workshop pipeline routing, avoiding on-site secondary cutting damage to lining.

4. Low Flow-Resistance Smooth Inner Wall

Ultra-smooth PTFE inner surface reduces fluid resistance and medium residue, lowering blockage risk when transporting crystal-containing slurry chemical raw materials, convenient for batch switching and pipeline flushing.

5. Wide Operating Condition Compatibility

Stable for temperature range -180℃ ~ 260℃, adapt atmospheric, positive pressure and moderate negative-pressure conveying, fit circulating transfer of hot corrosive chemical fluids.

6. Unified Matching Interface With Main-Process Equipment

Adopt HG20536 anti-corrosion flange standard, perfectly dock with Zhuoyan PTFE-lined reactor, storage tank and rectification column, realizing one-stop procurement for whole-plant anti-corrosion conveying network.

Main Application Fields

Mainly deployed for closed-loop transfer of corrosive liquid and slurry media in chemical industrial parks, with export records to Southeast Asia, Middle-East chemical manufacturing bases:

1. Fine-chemical production line: Circulating transportation of mixed acid, organic corrosive solvents

2. Fluorochemical industry: Conveying hydrofluoric acid and fluorine-salt liquid raw materials

3. New-energy lithium material: Delivery of electrolyte raw material and lithium-salt slurry

4. Pharmaceutical chemical plant: Transfer of high-purity corrosive intermediate fluids

5. Environmental-protection waste-liquid station: Transportation of concentrated acidic and alkaline waste water

6. Petrochemical auxiliary workshop: Conveying corrosive additive raw-material fluid

Standard Production Process

1. Carbon-steel pipe cutting and precision end-face processing, remove burrs of inner pipe orifice to prevent puncturing PTFE liner.

2. Internal surface Sa2.5 grade sandblasting treatment, improve adhesive force between steel pipe inner wall and PTFE sheet.

3. Sodium-activation treatment for PTFE raw material, apply dedicated high-temperature resistant adhesive evenly.

4. Vacuum-assisted pasting process inside clean workshop, make PTFE liner closely fit inner wall of steel pipe; full PFA hot-melt welding for flange transition positions.

5. Segment-by-segment 10KV spark scanning inspection, focus detection on pipe ends and flange transition areas.

6. Hydraulic pressure holding test, keep pressure for 30 minutes without pressure drop to verify overall tightness.

7. Inner-pipe dust-removal cleaning, all flange ports sealed by PTFE protective caps, bundled and packed for shipment.

FAQ

Q1: Can this PTFE Lined Chemical Conveying Pipeline transport hydrofluoric acid-containing fluid?

A: Yes, please select upgraded 3 mm thickened PTFE lining for hydrofluoric-acid medium to achieve long-term stable conveying.

Q2: What is the maximum custom length for a single section of lined conveying pipe?

A: Single pipe can be customized up to 6 m, over-long routes adopt modular multi-segment combined installation.

Q3: Can the pipeline system match existing PTFE lined reactors and storage tanks?

A: It follows HG20536 unified anti-corrosion flange standard, realizing seamless docking with full-set fluorine-lined process equipment.

Q4: Is on-site cutting allowed for PTFE lined chemical conveying pipeline segments?

A: On-site cutting is prohibited, cutting will destroy PTFE lining; confirm layout dimension before ordering, we provide pre-fabricated pipe segments.

Q5: What inspection items will each pipe section undergo before delivery?

A: Every pipe passes 10 KV spark leakage scanning and hydraulic pressure holding double test to rule out lining defects.

Q6: What does the warranty cover for this chemical conveying pipeline?

A: Carbon-steel pipe shell enjoys 10-year structural warranty; PTFE lining 5-year warranty, excluding artificial scratch and improper installation damage.