PTFE Lined Flange
Model:PTFE Lined Flange
We are one of the prominent manufacturers of PTFE Lined Flange. We can provide the Lining in Reducing Flange as well as Blind Flange. These Flanges are checked on different quality parameters by our experienced staff.
PTFE Lined Flange is a steel flange lined with virgin PTFE, PFA, or FEP to handle highly corrosive process media without corroding the metal body. Kaxite manufactures standard, reducing, and blind PTFE lined flanges from 1" to 16" in compliance with ASTM F1545, with 3 mm standard liner thickness, drilled to ANSI, DIN, JIS, or custom bolt patterns. Trusted by chemical, pharmaceutical, petrochemical, and food processing buyers who need reliable sealing at connection points in aggressive service. Get a quote in 2 business hours →
PTFE Lined Flange – Corrosion-Proof Connection Points for Aggressive Media
When you are building a pipeline that carries hydrochloric acid, sulfuric acid, chlorine, or other aggressive chemicals, the weakest link is often the flange connection. Kaxite PTFE Lined Flange solves this by combining a load-bearing steel flange with a seamless fluoropolymer liner that completely isolates the process media from the metal surface. The result: no crevice corrosion, no media contamination, no premature flange failure — just reliable sealing at every joint.
Our PTFE lined flanges are available in standard, reducing, and blind configurations, from 1" to 16" nominal bore, with liner materials in PTFE, PFA, or FEP. Every flange is inspected against dimensional, thickness, and hydrostatic quality parameters before it leaves our ISO 9001:2015 facility. All products meet ASTM F1545, and we can drill to ANSI, DIN, JIS, or your own bolt pattern.
Buyers from chemical plants, refineries, pharmaceutical lines, and water treatment facilities choose Kaxite because we combine factory-direct pricing, fast lead times, and genuine engineering support. Send us your flange spec and we will quote within 2 business hours, with material recommendations for your specific media and temperature.
Why Buyers Choose Kaxite PTFE Lined Flanges
- ✅ Full Chemical Isolation – PTFE, PFA, and FEP liners resist nearly all industrial acids, alkalis, solvents, and oxidizing agents.
- ✅ Steel Load-Bearing Body – The liner handles corrosion; the steel body handles pressure and bolting loads.
- ✅ Three Flange Types in One Product Line – Standard, reducing, and blind flanges from a single supplier.
- ✅ Wide Size Coverage – 1" to 16" standard, with larger sizes available on request.
- ✅ Temperature Stability – Continuous service from -29°C to +260°C depending on liner selection.
- ✅ Food-Grade Options – Suitable for food, beverage, and pharmaceutical service where purity matters.
- ✅ Custom Bolt Patterns – ANSI, DIN, JIS, or drawings supplied by your engineering team.
- ✅ Full Dimensional Inspection – Every flange is checked before shipment; test reports available on request.
PTFE Lined Flange – seamless fluoropolymer liner bonded inside the steel flange body
FLANGE TYPES AVAILABLE
Choose the Right Lined Flange for Your Pipeline
Standard PTFE Lined Flange
Slip-on, weld neck, and socket weld patterns for general corrosive service. Used at every connection point where the process media would attack the steel flange face.
PTFE Lined Reducing Flange
For transitions between different pipe sizes. The liner extends through the reducing bore so no metal is exposed to the media at the size change.
PTFE Lined Blind Flange
For sealing off pipeline ends, inspection openings, manifolds, and vessel nozzles. Liner covers the full internal face to prevent crevice corrosion.
Custom Flange Types
Orifice flanges, spectacle blinds, spade and spacer pairs, and other patterns lined to your drawings after process review.
Technical Specifications – PTFE Lined Flange
| Parameter | Value / Range |
|---|---|
| Product Name | PTFE Lined Flange |
| Flange Types | Standard, Reducing, Blind, Custom |
| Liner Materials | PTFE (standard), PFA, FEP |
| Body Materials | Carbon Steel, Stainless Steel 304/316, Ductile Iron, other alloys on request |
| Standard Lining Thickness | 3 mm (higher thickness available on request) |
| Size Range | 1" to 16" (custom sizes available) |
| Flange Drilling | ANSI, DIN, JIS, or custom drawings |
| Operating Temperature | -29°C to +260°C (depending on liner material) |
| Applicable Standard | ASTM F1545 |
| Pressure Rating | Up to 16 bar (depending on size and flange type) |
| Food-Grade Compliance | Available on request (FDA-compliant liner grades) |
* Custom liner thickness, body materials, flange types, and drilling are available. Send us your flange drawing for an accurate quotation.
Liner Material Selection Guide
Choose the right liner material for your process media, temperature, and purity requirements.
| Liner Material | Max. Temperature | Chemical Resistance | Best For |
|---|---|---|---|
| PTFE | 260°C | Excellent against most chemicals | General chemical service, acids, bases |
| PFA | 260°C | Similar to PTFE, better flexibility | High-purity service, semiconductor, pharma |
| FEP | 200°C | Good chemical resistance | Food & beverage, pharmaceutical |
* Consider permeation, thermal cycling, and vacuum service when selecting a liner. Our engineers are happy to recommend the right grade for your media.
Typical Applications
Chemical Processing Acid, alkali, and solvent transfer lines where the flange face would otherwise corrode.
Pharmaceutical High-purity fluid handling; liners prevent media contamination.
Petrochemical Sour gas, hydrocarbon streams, and corrosive process media.
Water Treatment Chlorine, acid, and coagulant dosing lines.
Food & Beverage Food-grade lined flanges for acidic foods and CIP systems.
Pulp & Paper Chlorine dioxide, bleaching agents, and corrosive slurries.
Quality Assurance & Certifications
Kaxite PTFE Lined Flanges are manufactured in our ISO 9001:2015 certified facility in Ningbo, China. Every flange passes through the following quality gates before shipment:
- ISO 9001:2015 quality management
- ASTM F1545 manufacturing compliance
- 100% dimensional inspection
- Liner thickness verification
- Hydrostatic pressure testing
- Full material traceability (EN 10204 3.1/3.2)
- FDA-compliant liner grades available for food service
- Third-party inspection on request (SGS, BV, TÜV)
Packaging & Shipping
Each PTFE Lined Flange is protected with face and bore covers to prevent liner damage during transport. Flanges are individually wrapped, bundled, and secured on wooden pallets or packed in wooden cases suitable for sea, air, or rail freight. Custom marking and packing lists are available for bulk orders.
* Shipping method: by sea, train, or air – we optimise logistics for cost and speed.
Why Choose Kaxite for PTFE Lined Flanges?
Over 30 Years of Manufacturing Experience – Proven track record supplying lined piping products to demanding industrial buyers.
Full ASTM F1545 Compliance – Lined flanges manufactured and tested to recognized international standards.
Custom Engineering – Non-standard sizes, liner thicknesses, and flange patterns lined to your drawings.
Factory-Direct Pricing – No middleman markup; you buy direct from the manufacturer.
Fast Lead Times – Standard sizes in stock; custom orders typically 7-15 days.
Engineer-Level Support – Free consultation on liner selection, bolting, and installation.
Field-Proven Reliability: Kaxite PTFE Lined Flanges are installed in thousands of critical applications worldwide, delivering reliable sealing performance in chemical plants, refineries, and pharmaceutical facilities.
Frequently Asked Questions
- Q: What is a PTFE Lined Flange used for?
- A: A PTFE Lined Flange is used at connection points in pipelines carrying corrosive chemicals, acids, alkalis, or high-purity fluids. The fluoropolymer liner isolates the media from the steel flange body, preventing corrosion and media contamination.
- Q: Which flange types do you supply?
- A: We supply standard, reducing, and blind PTFE lined flanges. We can also line orifice flanges, spectacle blinds, and spade/spacer pairs to your drawings after process review.
- Q: What is the standard lining thickness?
- A: The standard PTFE lining thickness is 3 mm. Higher thicknesses are available on request to suit specific pressure, permeation, or vacuum service conditions.
- Q: What size range do you offer?
- A: PTFE lining can be performed on flanges from 1" to 16". Custom sizes outside this range are available on request.
- Q: Are the flanges suitable for food-grade applications?
- A: Yes. Our PTFE, PFA, and FEP liners are chemically inert and we offer FDA-compliant liner grades for food, beverage, and pharmaceutical service where media purity must be maintained.
- Q: What is the typical lead time for a bulk order?
- A: Standard sizes ship within 3-5 days when in stock. Custom sizes, liner thicknesses, or special body materials typically require 7-15 days depending on quantity and material availability.
- Q: Can you drill the flange to our custom bolt pattern?
- A: Yes. We can drill to ANSI, DIN, JIS, or your own bolt pattern. Send us your drawing along with your inquiry and we will confirm feasibility and pricing within 2 business hours.
Ready to order or need technical advice? Send your flange specification and our engineering team will respond within 2 business hours with pricing and material recommendations.
Partner with Kaxite Sealing – your reliable supplier of PTFE Lined Flanges. With decades of experience, a wide range of liner materials, and a commitment to quality, we deliver flange solutions that ensure safety, reliability, and compliance in the most demanding industrial applications. Request a free design review or get a bulk quote today.
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Contact Info
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Address
No. 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
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