In recent years, there has been a lot of buzz around the polymer Polyvinylidene Fluoride (PVDF). It sparked interest because it has the strongest piezoelectric characteristics of any commercial polymer. Polymers are frequently employed in high-tech applications such as chemical process equipment, electrical and electronic equipment, speciality and energy-related applications. But what makes PVDF PIPE a high-performance plastic in a variety of industries? Continue reading to learn more.
PVDF (Polyvinylidene Fluoropolymer) is a strong, stable fluoropolymer with particular technical benefits. PVDF, which was discovered in 1969 by Dr. Heijji Kawai, offers an excellent performance-to-cost ratio.
PVDF is a semi-crystalline thermoplastic that is utilized in applications that need the utmost purity and can survive severe chemicals. PVDF is one of the most radiation-resistant polymers available, only being outperformed by PEEK and Polyimide.
The polarity of alternating CH2 and CH2 groups on the polymer chain leads to very desired insolubility and electrical characteristics.
When compared to other fluoropolymers, PVDF has a low density (1.78/cm3).
Our FL308 is available in Rod, Tube, and Sheet forms and may be manufactured via injection moulding, compression moulding, or hot moulding. This material is widely utilized in the semiconductor, defence, chemical, and medical sectors, as well as in the manufacture of lithium-ion batteries.
PVDF, which consists of homopolymers and copolymers, is
typically produced using the free radical polymerization of 1,1-difluoroethylene (CH2=CF2). Polymerization occurs in a suspension or emulsion at temperatures ranging from 10-150°C and pressures ranging from 10-300 atm. The resultant material is subsequently processed into film or sheets.
PVDF Fittings copolymers are most often prepared using chlorotrifluoroethylene (CTFE) or hexafluoropropene (HFP).
Copolymers are appropriate for wire and cable as well as tube applications that require increased flexibility.
Production of the PVDF Solef® lines is carried out according to the highest quality standards and in full compliance with the environmental restrictions set by the applicable laws in force and in accordance with ISO 14001. All products are made in accordance with the quality guarantee system in compliance with ISO 9001.
Polyvinylidene fluoride (PVDF) is a high weight fluoropolymer and long-lasting thermoplastic with good thermal, mechanical, electrical, and chemical properties. PVDF is exceptionally well suited for material engineering and plastic-type applications because of these qualities. For long-term service, Kynar PVDF is essentially inert, durable, and stable. PVDF, being a thermoplastic polymer, loses stiffness when heated, allowing for product recycling and reformation. Kynar, as synthetic plastic, is resistant to high temperatures, harsh/aggressive chemical handling, pressured fluid systems, and outdoor installations. PVDF products are permitted for usage at temperatures as high as 284°F prior to material softening. This is significantly higher than PVC or CPVC, which have maximum service temperatures of 140°F and 200°F, respectively. PVDF resins may be suitable for even higher temperatures, depending on the individual grade.
PVDF products like PVDF Ball Valve are naturally resistant to many of the problems associated with other materials. PVDF is resistant to surface abrasion, fungus, algae, and microbial film growth, the formation of fire and smoke, ozone exposure and usage damage, and is naturally unaffected by the breakdown effects of sunlight UV to which most other polymers are prone. PVDF is an excellent insulator that resists both hot/cold thermal transfer and electrical conductivity. PVDF also has unusual piezoelectric capabilities, which means it may respond to and influence electrical and/or magnetic fields.
PVDF PIPE rates high among synthetic and metallic materials in terms of chemical compatibility, as well as resistance to chemical penetration and attack. PVDF is chemically stable and resistant to strong acids, strong oxidants, solvents, halogens, alcohols, salts, and weak bases. PVDF has been observed to be possibly sensitive to softening and/or swelling when exposed to strong bases, esters, and ketone specified compounds.
Linear expansion coefficient
|Polyvinylidene Fluoride (PVDF)
~1.78g/cm (ISO 1183 / ASTM D 92)
0.12–0.18 m/mK (DIN 53752)
≥1700 N/mm (EN ISO 527 / ASTM D 790)
0.19W/mK (DIN 52612)
5×10 cm (IEC 60093)
|Dimension||d20 (1⁄2”)–d315 (12”)
in accordance to ISO 10931
|Pressure rating||Pipes/fittings: 20–110 mm PN 16 (232 PSI); 160–315 mm PN 10 (150 PSI)
Valves: separate specification
|Temperature rating||from −20 C to 140 C (−4 F to 284 F)|
|Production||Fittings/valves: injection molded
Pipes: extruded and stress relieved (ISO 10931-2)
Valves: injection molded (additional available oil free treated and paint compatible / ilicon free)
|Surface finish||Inner surface Ra ≤ m (20 in) for injection molded and extruded components|
|Marking||All components are embossed with a permanent identification during the production process to
ensure full traceability.
|Testing and inspection
FDA CFR 21 177.2510
USP 25 class VI (physiological non-toxic)
UL 723 ASTM E-84 25/50 for building plenums for sizes 20–75 mm
|Welding technology||BCF® Plus, bead and crevice free fusion, size d20 (1⁄2”) – d110 (4”)
IR Plus®, infrared fusion (DVS 2207-6), size d20 (1⁄2”) – d315 (12”)
Butt fusion (DVS 2207-15), size d20 (1⁄2”) – d315 (12”)
Socket fusion (DVS 2207-15), size d20 (1⁄2”) – d63 (2”)
|Documentation*||Certificate of Conformance with FDA, USP
EN 10204 2.2
EN 10204 3.1
|Packing**||Multiple components single bagged in specified bag|
|Main applications||Uses include delivery of pharmaceutical grade purified water (PW) and DI water, using hot water,
steam chemical or ozone sanitization. Due to its excellent chemical resistance it is widely used in
chemical distribution systems.
• Material: PVDF
• Supplied in 5m (16.4 foot) length
• Certified for building air plenum according to UL 723 ASTM E-84 25/50, sizes 20-75mm
|20||BCF, IR||* 175 484 203||0.463||1.9||16.2|
|25||BCF, IR||* 175 484 204||0.593||1.9||21.2|
|32||BCF, IR||* 175 484 205||0.959||2.4||27.2|
|40||BCF, IR||* 175 484 206||1.241||2.4||35.2|
|50||BCF, IR||* 175 484 207||1.874||3.0||44.0|
|63||BCF, IR||* 175 484 208||2.403||3.0||57.0|
|75||BCF, IR||* 175 484 209||3.417||3.6||67.8|
Model: • Material: PVDF • Supplied in 5m (16.4 foot) length • Material: PVDF * on request
|90||BCF, IR||* 175 480 210||4.916||4.3||81.4|
|110||BCF, IR||* 175 480 211||7.341||5.3||99.4|
|*||250||IR||* 175 481 218||11.9||226.2|
|*||280||IR||175 481 219||13.4||253.2|
|*||315||IR||* 175 481 220||15.0||285.0|
• Material: PVDF
• Supplied in 5m (16.4 foot) length
|160||10||IR||* 175 480 668||10.009||4.9||150.2|
|200||10||IR||* 175 480 669||15.851||6.2||187.6|
|225||10||IR||* 175 480 670||19.731||6.9||211.2|
|250||10||IR||* 175 480 671||24.471||7.7||234.6|
|315||10||IR||* 175 480 674||38.801||9.7||295.6|
|Pressure Pipe||SDR 41||SDR 33||SDR 21||SDR 17.6||SDR 17||SDR 11||SDR 7.4|
|Size range||d 16 ÷ d 110 (mm)|
|Nominal pressure||SDR 21 (PN16) with water at 20° C
/SDR 33 (PN10) with water at 20° C
|Temperature range||-40 °C ÷ 140 °C|
|Coupling standards||Welding: EN ISO 10931. Can be coupled to pipes
according to EN ISO 10931
|Reference standards||Construction criteria: EN ISO 10931
Test methods and requirements: EN ISO 10931
Installation criteria: DVS 2201-1, DVS 2207-15, DVS
|Liner pipe, pre-treated||Liner pipe, untreated|
|d mm||e mm||emm|
Regression coefficients according to
ISO 10931 for MRS
For water and non-hazardous fluids
for which the material is classified
as CHEMICALLY RESISTANT (life ex-
pectancy 25 years). In other cases,
a reduction of the nominal pressure
PN is required.
It is important to know the right process of installation of PVDF. The processes differ for threaded and flanged joints.
For threaded joints:
To guarantee the hydraulic seal of the joint on fittings and valves with a threaded female end, we recommend you perform the following operations:
For flanged joints: