Our Materials
There are various types of flouropolymers used for Lining:
- PTFE
- PFA
- FEP
- PP
- PVDF
Flouorpolymer or Flouroplastic is defined as a polymer consisting of carbon (C) and Fluorine (F).They are also referred as Perflouropolymers to distinguish from partially fluorinated polymers, flouoroelastomers, and other polymers that contain fluorine in their chemical structure. An Example of linear Flouropolymer is tetrafluoroethylene (PTFE).
The Basic Properties of fluoropolymers arise from the atomic structure of fluorine, carbon and their covalent bonding in specific chemical structures. These properties are weakened as the chemical structure become less perfluorinated as in polyvinylidene fluoride.PTFE Backbone is formed by carbon-carbon bonds and carbon-Fluorine Bonds.
The Size of the fluorine atom allows the formation of uniform and continuous sheath around the carbon-carbon bonds and protects them from attack, thus imparting chemical resistance and stability to molecule. The Fluorine sheath is also responsible for low surface energy and low coefficient of friction. Another attribute of the uniform fluorine sheath is the electrical inertness of the PTFE Molecule.
Fundamental Properties of PTFE
- High Melting Point, 342 Degree Celsius
- High Thermal Stability
- Useful Mechanical Properties at extremely low and high temperatures
- Insolubility
- Chemical Inertness
- Low Coefficient of Friction
- Low Dielectric Constant
- Low Water Absorptivity
- Excellent wheatherability
- Flame Resistance
There is Branched Flouoropolymer such as fluorinated ethylene Propylene Polymer (FEP).
Oxygen and chlorine are present in the chemical structure of some commercial Fluoropolymers such as Perflouroalkoxy polymer. (PFA)
There is a second class of fluoropolymers called partially fluorinated in contrast to perfluorinated polymers. These Molecules include hydrogen in addition to fluorine and carbon. Example includes PolyVinylidene Fluoride. (PVDF).
Polypropylene, also known as polypropylene, is neither a fully or partially fluorinated fluoropolymer having lesser chemical and temperature resistance compared to other fluoropolymers. Polypropylene works ideally in a process temperature upto 100°C for mildly corrosive media.
| Flouoropolymer | Maximum Continuous Temperature |
| PTFE | Continuous use Temperature: 260 Degree Celsius. |
| PFA | Continuous use Temperature: 260 Degree Celsius. |
| FEP | Continuous use Temperature: 180 Degree Celsius. |
| PVDF | Continuous use Temperature: 150 Degree Celsius. |
| PP | Continuous use Temperature: 100 Degree Celsius. |
- Pipes:
Seamless as per ASTM A 106, Sch. of Pipe: - 25 NB to 150 NB as per Sch.40, from 200 NB to 400 NB as per Sch.20. - Pipes will have one side loose flange and other side fixed flange.
- Elbow:
As per ASTM A 395/A234. - Fittings:
As per ASTM A 395 / A 234. - Flanges:
As per IS2062, ASTM A 105, SOFF, ANSI 150#. - Fittings Dimensions:
Over all dimensions as per ANSI B16.5 150 #. - Pipe/Elbow Liners:
Manufactured by paste extrusion process by using virgin PTFE as per ASTM D 4895 only BY DuPont resin 669. - Tee/Red Tee Liners:
Manufactured by injection molding (melt) process by using virgin PFA as per ASTM D 3307 only. - Reducers Liners:
Single step down reducers will be manufactured in PTFE as per ASTM D 4895 and more than one step reducers will be manufactured in PFA as per ASTM D 3307.
