The excellent chemical resistance in combination with a higher temperature and pressure resistance makes ECTFE to an essential material in the chemical industry. AGRU Kunststofftechnik as a pioneer in the processing of technical plastic materials has more than 30 years of experience in manufacturing of pressure resistant ECTFE piping systems and semi-finished products made of ECTFE (Halar®).
A “unique” material with “unique” material properties”
ECTFE is offered by Solvay Speciality Polymers under the trade name Halar®. Halar® products consist of a copolymer with ethylene and chlorotrifluoroethylene arranged alternately (see Fig. 1).
High mechanically strength combined with excellent impact properties
ECTFE belongs to the group of the partly fluorinated polymers, which are characterized by a high mechanical strength. Thus, ECTFE (Halar®) is a perfect choice for pressure pipes in harsh environments. Due to the fact, that ECTFE is a copolymer with ethylene groups the impact properties are excellent. Thus, ECTFE is a material, which combines both properties, stiffness and elasticity in a perfect way.
ECTFE (Halar®) has a perfect chemical resistance from pH range 1-14 up to 120 °C
AGRU ECTFE (Halar®) piping systems can be used in a pH range from 1 – 14, even 98 % concentrated sulphuric acid (H2SO4), 70 % hydrofluoric acid (HF), 50 % sodium hydroxide (NaOH) and 36 % hydrochloric acid (HCl) can be handled safely up to +120 °C for a long period of time. Also for highly oxidative applications such as sodium hypochlorite (NaOCl), chlorine gas (Cl2), ozone (O3), chlorine (Cl2) AGRU ECTFE (Halar®) products are the best solution. Compared to PVDF, ECTFE has a better chemical resistance, especially when exposed to lyes. Furthermore, this material demonstrates excellent resistance to the corrosive influence of heat, strong radiation, and weathering.
Ideal for high purity applications
ECTFE (Halar®) is distinguished from all other fluoropolymers by its exceptional surface smoothness, which precludes the shedding of particles and avoids particle trapping. The surface exhibits a low deposit of microbial bio‑fouling, making it ideal for the use in UPW applications.
Further features of ECTFE (Halar®)
Its excellent welding properties and thermoplastic formability make simple and cost-saving processing possible, both in the workshop and on-site. As a partially fluorinated polymer ECTFE shows a high flame retardancy and resistance to microorganism growth. Further properties are a high resistance to UV (sunlight) and gamma radiation and high insulation and electrical resistances. AGRU Halar® piping systems are therefore the perfect choice for all purposes.
AGRU ECTFE (Halar®) properties on one view
- Density: 1.69 g/cm³
- E-Modulus: 1600 MPa
- Wide application temperature range: -76 °C to +140 °C
- Low permeation rate
Advantages of AGRU ECTFE (Halar®) products
- High pressure load resistance
- Very good weathering resistance
- High impact and abrasion resistance
- Outstanding chemical resistance against concentrated corrosive media and chlorine at high operating temperatures (up to 121°C)
The biggest ECTFE product range in the chemical industry
AGRU is able to offer the most comprehensive ECTFE delivery program in industry. ECTFE piping systems, fittings, valves, sheets and round bars, everything comes from one single source, made in Austria. Due to the special production processes, pipes can be produced in high purity up to a diameter of 110 mm as a standard item. Diameters up to 200 mm are available on request.
To complete the piping supply range, fittings and valves are available in stock in several dimensions and geometries. AGRU is not only producing ECTFE (Halar®) for piping systems, but also semi-finished products, which are required for the construction of chemical resistant tanks and plant components. To cover all possibilities AGRU is offering natural ECTFE sheets for solid tank construction and fabric backed ECTFE sheets for lining applicationsof steel or FRP structures. The table beside will give you an impression on the ECTFE product range of AGRU.
Further ECTFE (Halar®) products are available on request.
ECTFE (Halar®) Piping system for Sodium Hypochlorite
AGRU IR- welding technology
AGRU´s long standing welding experience is bundled in the compact SP-series welding machines. They provide a fully automatic, contact-free welding process, with all welding parameters pre-programmed in the machines. Thermally fused joints have the highest integrity over all other joining methods typically used in industrial piping systems.
Long-time experience of AGRU in ECTFE applications
AGRU ECTFE piping systems and semi-finished products have been in use since 1990 in hundreds of applications worldwide. These include complete programm, complete system, comprehensive dimension range and 30 years of experience in production and application.. An increasingly important application is the chlorination of cooling water intakes for the use thermal power plants. AGRU also supplies double containment piping systems with ECTFE media pipe. Please follow the links below to see some positive case studies of Chlorination piping systems and many more