The high-spec choice for concentrated acids, hot oxidisers and high-purity service, where PVC, HDPE and PP reach their limits. Welded and fabricated to DVS standards in our Brisbane workshop.
Quick spec. Density 1.78 g/cm³ · continuous service −40 to +140 °C · tensile strength 30 to 50 MPa · outstanding resistance to concentrated acids, hot oxidisers (concentrated sodium hypochlorite, ozone, peroxide), halogens and most solvents · low flame spread and low smoke · high-purity, low-extractable grades for UHP service.
Why PVDF matters in process plant
PVDF (polyvinylidene fluoride) is the premium fluoropolymer we specify when the chemistry or temperature exceeds what PVC, HDPE and polypropylene can take. The fluorine on the polymer backbone delivers near-universal chemical resistance, concentrated and oxidising acids, hot sodium hypochlorite, ozone, peroxide, chlorine and bromine, combined with a continuous service temperature to roughly 140 °C, high mechanical strength and very low extractables for high-purity duty. Its limits are cost (typically three to five times PVC or PP) and strong bases and amines, where polyolefins are the better pick. PVDF is the material we reserve for high-concentration, high-temperature or critical-reliability service.
Engineering properties
| Property | PVDF |
|---|---|
| Density | 1.78 g/cm³ |
| Tensile strength (yield) | 30 to 50 MPa |
| Flexural modulus | 2,000 to 2,900 MPa |
| Service temperature | −40 to +140 °C continuous |
| Chemical resistance | Outstanding vs concentrated and oxidising acids, hot sodium hypochlorite, ozone, peroxide, halogens and most solvents. Not for strong bases, amines or hot polar solvents. |
| Purity | Low extractables; high-purity (UHP) grades for semiconductor and pharmaceutical service |
| Fire performance | Low flame spread, low smoke (UL 94 V-0 grades) |
| Weldability | Hot-gas and extrusion welding; fabricated and welded to DVS 2207 |
Where we use PVDF
High-concentration & hot oxidiser duty
The premium option for concentrated or elevated-temperature sodium hypochlorite, ozone and peroxide service, beyond the PVC window.
Concentrated & hot acids
Sulfuric above 80%, nitric, hydrochloric above 30% and hydrofluoric acid, and warm acid service to 120 °C-plus.
High-purity & UHP systems
Low-extractable PVDF pipework for ultra-pure water, electronics and pharmaceutical process lines.
Dual-laminate linings
PVDF inner liner bonded to an FRP structural outer for the most aggressive duties at large diameter.
Formats and cut to size
PVDF is held in our sheet, rod and tube range for aggressive chemical, high purity and high temperature duty, machined and welded to DVS 2207. See sheet, rod and tube stock and cut to size plastic.
Standards and compliance, at a glance
- DVS 2205, thermoplastic tank design.
- DVS 2207, thermoplastic welding procedure and welder qualification.
- ISO 10931, PVDF piping systems for industrial applications.
- AS/NZS 4020, products in contact with drinking water, where potable.
Frequently asked questions
When the chemistry or temperature exceeds what PVC, HDPE and polypropylene can take: concentrated and oxidising acids, hot sodium hypochlorite, ozone, peroxide, halogens and most solvents, with continuous service from minus 40 to plus 140 degrees.
Cost, typically three to five times PVC or PP, and strong bases and amines, where polyolefins are the better pick. We reserve PVDF for high concentration, high temperature or critical reliability service.
Yes. It has very low extractables, with high purity UHP grades for semiconductor and pharmaceutical process lines and ultra pure water pipework.
Sulfuric above 80 percent, nitric, hydrochloric above 30 percent and hydrofluoric acid, and warm acid service to 120 degrees plus.
A PVDF inner liner bonded to an FRP structural outer, used for the most aggressive duties at large diameter. Fabrication and welding are to DVS 2205 and DVS 2207.
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