PTFE Lined Chemical Pipeline Elbow

PTFE Lined Chemical Pipeline Elbow offered by Zhuoyan, a professional manufacturer from China, is an indispensable core fitting inside anti-corrosion chemical piping system. In corrosive fluid delivery lines, flow direction changes take place at elbows; high-speed scouring by acid, alkali and fluorine-containing media makes bend positions the most vulnerable failure points of the whole pipeline. Ordinary carbon-steel elbow suffers rapid erosion; simple sprayed fittings easily have coating peeling under medium scouring. Our composite elbow combines high-strength carbon-steel outer body and seamless full-coverage PTFE inner lining, specially solving scouring-corrosion risk at turning corners. It can be directly matched with PTFE lined straight pipes, tees and reducers, widely applied in closed corrosive-medium conveying lines of overseas chemical industrial parks.

What is PTFE Lined Chemical Pipeline Elbow

PTFE Lined Chemical Pipeline Elbow is dedicated anti-corrosion pipe bend fitting, consisting of carbon-steel elbow body and seamless vacuum-laminated PTFE inner liner. Its core function is changing fluid flow direction inside chemical conveying pipeline. Different from straight pipeline sections, the inner bending surface of elbow bears continuous high-speed medium scouring. Our product achieves 100 % full PTFE coverage on bending arc, inner bore and flange sealing face without exposed metal area. Available in multiple bending angles for different piping routing requirements. It belongs to passive pipe fitting, not used for reaction, storage or separation, only for medium diversion in closed conveying loops, and connects with other lined pipe components via HG20536 anti-corrosion flanges.

Complete Technical Specification Table

Core Features

1. Full-Arc Seamless Lining Against Flow Scouring The whole bending arc receives integral PTFE cladding, no splicing welds at flow turning position, effectively resist continuous scouring from high-speed corrosive fluid, greatly extend service-life of the most vulnerable position of piping network.

2. Zero-Dead-Angle Flange Integral Covering Inner bore and flange sealing surface are continuously wrapped by PTFE, eliminating crevice corrosion risk at flange joint, avoid medium seepage between lining and steel matrix.

3. Multi-Angle Flexible Selection For Complex Layout Provide 45°,90°,180° three mainstream angles, satisfy complicated workshop pipeline turning, bypass and U-loop layout, reduce on-site secondary modification work.

4. High-Strength Carbon-Steel Matrix Forged carbon-steel elbow body bears system pressure and external mechanical impact, avoid deformation under pipeline thermal expansion and contraction.

5. Perfect Interchangeability With Full-Series Lined Piping Unified HG20536 anti-corrosion flange dimension, can be interchangeably assembled with Zhuoyan lined straight pipe, tee, reducer and main process equipment.

6. Compact Pre-fabricated Structure Finished elbow is fully pre-lined in factory, no on-site lining operation required, shorten chemical-plant piping installation cycle.

Operation Precautions

1. Medium adaptability: Though resistant to most corrosive fluids, molten alkali metal and chlorine trifluoride will damage PTFE lining; do not apply for such media. Upgrade to 3 mm thick lining if fluid contains hydrofluoric acid and brings strong scouring effect.

2. Flow-rate restriction: Avoid long-term excessive high flow velocity; over-fast fluid will accelerate physical abrasion on inner bend-arc lining surface.

3. Installation protection: Protect flange PTFE sealing face during hoisting and installation; prevent scratch caused by iron wire, sharp tool.

4. Thermal expansion consideration: Reserve proper pipeline displacement margin, prohibit forced assembly by brute-force pulling elbow to compensate installation position deviation.

5. Pressure limitation: Operate strictly within rated pressure-temperature range; over-pressure will cause lining separation hidden danger.

6. Welding prohibition: Never perform on-site welding or cutting on elbow body, high temperature will destroy bonding performance of inner PTFE lining.

Packaging & Global Shipment

1. Inner protection: Every elbow inner cavity is blown clean; flange sealing faces are individually covered by dedicated PTFE anti-scratch protective caps to prevent lining damage in transit.

2. Outer packaging: Small-size elbows adopt partitioned carton packaging; large-dimension DN200-DN500 elbows are fixed by customized wooden crate with shock-proof filler, avoid mutual collision.

3. Container loading: Elbows are separated by cushion blocks, prevent extrusion and friction between fittings in sea-land mixed transportation.

4. Available delivery ports: Qingdao, Shanghai, Tianjin.

5. Complete customs-clearance documents: Commercial invoice, packing list, factory inspection test report, CE supporting documents can be supplied together.

FAQ

Q1: Can this PTFE Lined Chemical Pipeline Elbow bear long-time scouring by hydrofluoric acid-containing fluid?

A: For HF-containing scouring medium, please choose 3 mm thickened lining version to get reliable service performance.

Q2: Can we get 180-degree U-bend lined elbow for pipeline loop layout?

A: Yes, 45°, 90°, 180° bending angles are all customizable according to your piping drawing.

Q3: Is it allowed to carry out on-site cutting or welding modification for installed elbow?

A: On-site cutting and welding are strictly forbidden; high temperature will damage inner PTFE lining bonding layer.

Q4: Can this elbow be directly connected with your PTFE lined straight pipe?

A: It adopts unified HG20536 anti-corrosion flange standard, direct assembly with full-series fluorine lined piping components.

Q5: What gasket should be matched with PTFE lined chemical pipeline elbow flange?

A: Must use supporting PTFE gasket; ordinary rubber or metal gaskets are not recommended.

Q6: What is the warranty policy for lined elbow fittings?

A: Carbon-steel elbow body enjoys 10-year structural warranty; PTFE lining 5-year warranty, exclude scratch and installation-caused artificial damage.