Isostatic Pressed Flared PTFE Pipes

Overview

Anhui Xinfulong's Isostatic Pressed Flared PTFE Pipes are engineered for high-purity and corrosive fluid handling applications where connection integrity is as critical as chemical resistance. Manufactured using advanced isostatic pressing technology — the gold standard for critical chemical service — our pipes feature precision-formed flared ends that provide reliable, leak-free flange connections while maintaining the exceptional purity and corrosion resistance of virgin PTFE.

The isostatic pressing process applies uniform hydrostatic pressure (100–300 MPa) from all directions via liquid or gas media, producing a completely voidless, homogeneous material structure. This results in superior density, uniform wall thickness, and isotropic mechanical properties that conventional molding or extrusion methods cannot achieve. The flared ends are formed by heating and compressing the PTFE against the pipe flange face, creating a full-face seal that protects the metal flange from corrosive media.

Key Features

Superior Isostatic Pressing Quality

• Homogeneous, voidless material structure with isotropic physical properties-

• Uniform wall thickness eliminates weak points, pressure resistance issues, and PTFE cracking caused by thickness deviations

• Higher density and lower permeability compared to conventionally molded or extruded PTFE

• Seamless construction — no welded joints, no extrusion lines, no potential failure points

Precision-Formed Flared Ends

• PTFE is heated and compressed against the pipe flange face to form a full-face flare

• Creates a tight, leak-proof seal when metallic bolts compress two flared edges

• Protects the metal flange face from corrosive media contact

• Eliminates crevices where contamination or corrosion could initiate

Exceptional Chemical Resistance

• Inert to virtually all chemicals, including concentrated acids, alkalis, organic solvents, strong oxidants, and toxic or flammable chemicals-

• Outstanding resistance to permeation — isostatic compression achieves the lowest permeation rates

• Withstands temperatures from -70°C to +260°C

Ultra-High Purity

• 100% virgin PTFE resin — no recycled material that degrades faster under thermal cycling

• No metal ion contamination — isostatic pressing excludes contact with metal components

• Extremely smooth, non-porous surface prevents particle entrapment and microbial growth

• Anti-adhesive surface properties enable easy cleaning and maintenance

High Mechanical Integrity

• Excellent resistance to thermal shock and mechanical stress

• High creep resistance and dimensional stability under load

• Superior abrasion and wear resistance

• Full vacuum rating throughout the entire temperature range

Long Service Life

• Seamless, fully fused lining means no delamination under thermal cycling

• Predictable service life with minimal maintenance requirements

• Reduces pipe replacement costs and processing downtime

Technical Specifications

Manufacturing Process

1. Material Selection — Only 100% virgin PTFE resin from certified suppliers is used

2. Steel Pipe Preparation — Carbon steel or stainless steel pipes are shot-blasted to Sa 2.5 cleanliness, pre-heated, and inner surface roughened for mechanical adhesion

3. Isostatic Pressing — PTFE powder is loaded into the pipe and placed in a high-pressure chamber. Uniform pressure (100–300 MPa) is applied from all directions, eliminating voids and ensuring homogeneous density

4. Sintering — The pipe is heated to approximately 380°C in a computer-controlled furnace following a precise sintering curve, fusing the PTFE into one continuous tube

5. Cooling & Finishing — Controlled cooling prevents stress cracks

6. Flaring — The PTFE at each end is heated and compressed against the pipe flange face to form a precision flared end

7. Quality Control — Each pipe undergoes spark testing (25 kV), hydrostatic testing (1.5x design pressure), ultrasonic thickness measurement (5+ points per meter), and visual inspection

Applications

Our Isostatic Pressed Flared PTFE Pipes are widely deployed in:

Semiconductor Manufacturing

• High-purity chemical delivery lines for wet etching, wafer cleaning, and photoresist processing

• Ultra-pure water (UPW) distribution systems

• Chemical mechanical planarization (CMP) slurry delivery

• Wet process equipment connections

Wet Electronic Chemicals

• Transfer lines for high-purity acids, solvents, and etchants

• Chemical blending and distribution systems

• High-purity reagent feed lines

Chemical Processing

• Transport of any concentration of acid, alkali, organic solvents, strong oxidants, and toxic or volatile chemicals-

• Corrosive fluid handling where connection integrity is critical

• High-purity chemical feed and recirculation lines

Pharmaceutical & Biotech

• High-purity fluid transfer with zero contamination risk

• Solvent and reagent delivery systems

• FDA-compliant processing lines

New Energy

• Battery chemical processing and electrolyte handling

• Photovoltaic wet processing lines

Refineries & Petrochemicals

• Corrosive media transport

• High-temperature chemical processing

Why Choose Xinfulong Isostatic Pressed Flared PTFE Pipes?

• Gold Standard Manufacturing — Isostatic pressing + sintering is the highest standard fluorine-lined pipeline molding process

• Superior Connection Integrity — Precision flared ends provide reliable, leak-proof flange connections that protect metal flanges from corrosive media

• Cleanroom Manufacturing — Critical production processes carried out in Class 1000/10,000 cleanrooms, ensuring the highest levels of purity

• Industry-Leading Expertise — Backed by decades of fluoropolymer processing experience and R&D collaboration with Japanese and Korean experts

• Proven Global Track Record — Trusted by clients across Europe, Japan, Korea, Taiwan (China), and beyond

• Comprehensive Quality Assurance — ISO 9001, ISO 14001, ISO 45001 certified with full in-house testing capabilities including spark testing, hydrostatic testing, and ultrasonic measurement

• End-to-End Service — From custom design and material selection to manufacturing, testing, and after-sales support

• Standards Compliance — Meets or exceeds ASTM F1545 inspection standards

Customization Options

We offer fully customizable isostatic pressed flared PTFE pipes to meet your specific requirements:

• Custom diameters (DN25 to DN600 and above)

• Custom lengths and spool configurations

• Flanged ends with various drilling standards (ANSI, DIN, JIS)

• Carbon steel or stainless steel outer pipe options

• Integration with complete piping systems including fittings, valves, and accessories

• Custom flaring dimensions to match specific flange designs