Selecting a liner material is easy at Plastic Lined Piping Systems. We offer by far the broadest liner selection of anyone in the industry. This permits you to choose the plastic lining for your pipe and fittings that is most cost effective for your operating conditions.Polypropylene (PP) is the least expensive of all our liner systems. It has proven chemical resistance in a wide variety of applications. Polypro is a copolymer and can be used from -20°F to 225°F. Mechanical properties are good and tensile strength is generally in the 4000 to 4500 PSI range. Pipe and fittings are not vented for safety. Polypropylene plastic lined pipe and fittings are the most common in the industry.
Polyvinylidene Fluoride (PVDF) (Kynar®) has excellent mechanical properties and is resistant to most chemicals. It's temperature range is -20°F to 275°F. Tensile strength is 4500 to 6500 PSI. PVDF plastic lined steel pipe and fittings are not vented.
EthyleneChlorotrifluoroEthylene (ECTFE) (Halar®) is a fluoropolymer with exceptional properties. It has by far the best combination of chemical resistance and toughness of any lining material we offer. ECTFE is superior where temperature cycling, mechanical stress, abrasion, or permeation are a problem. Temperature range is -20°F to 300°F. Tensile strength is typically in the 6000 to 7000 PSI range. When this lining material is used in your plastic lined pipe and fittings, it is not vented.
EthylenetetraFluoroethylene (ETFE) (Tefzel®) is a fluoropolymer with superior physical properties and chemical resistance approaching that of Teflon. ETFE is excellent where high pressure, vacuum, or cold flow is a problem. Temperature range is -20°F to 302°F. Tensile strength is approximately 6700 PSI. Metal is not vented for safety. This liner material is bonded into fittings and configurations.
Polytetrafluoroethylene (PTFE) (Teflon®) is virtually inert to all chemicals except elemental fluorine and molten alkali metals. Over 300°F there is no other liner choice. PTFE is softer and has less strength for a given thickness than our other liners so it requires special design considerations. PTFE because of its microporosity, has a higher gas permeation rate which can be improved by increasing the liner thickness, which also helps its overall strength. Special attention to piping alignment and torquing of flange bolts will keep creep or cold flow to a minimum. Temperature range is -20°F to 450°F. Tensile strength is approximately 3000 PSI. Piping and fittings with PTFE liners are vented.
Perfluoroalkoxy (PFA) (Teflon®) has the same corrosion resistance as PTFE but is tougher mechanically and does not creep or cold flow like PTFE. Temperature to 500°F.Tensile strength is 4000 to 4500 PSI. All plastic lined piping systems using this liner material are vented.
MFA is a modified fluoroalkoxy similar to PFA. MFA is a copolymerization of tetrafluoroethylene and perfluoromethylvinylether. MFA is a new fluoropolymer for extrusion and eventually molding applications with an optimized price/performance ratio in comparison with other semicrystalline perfluoropolymers. MFA is designed for high temperature applications in the chemical industry. MFA has outstanding physical and chemical properties similar to those of other totally fluorinated polymers. It is similar to PFA. Temperature range is 475°F-500°F. MFA is available at a lower price than PFA.
Want to know more? Have some fun at The University of Southern Mississippi's School of Polymers and High Performance Materials.
Corrosion resistance? Check the chemical resistance guide.
Teflon® and Tefzel® are registered trademarks of E.I. du Pont de Nemours and Co.
Halar® is a trademark of Ausimont USA
Kynar® is a trademark of Elf Atochem