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PVDF Pipe & Fitting


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.

What is PVDF?

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.

How is PVDF made?

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).

  • PVDF Copolymers containing HFP are more flexible than PVDF homopolymer grades.
  • Copolymers containing CTFE are among the most versatile PVDF materials, having outstanding low-temperature performance and little shrinkage.

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.

Characteristics and properties of PVDF

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.

PVDF Pipe Fittings Range

PVDF Pipe & Fittings Technical Details

Surface tension
Linear expansion coefficient
Thermal conductivity
Surface resistivity
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.
Lot No
Pressure Rating
Testing and inspection
(ISO 10931)
Visual inspection
Surface finish
Dimension tolerance
Pressure testing
Approvals/conformance DIBt
FDA CFR 21 177.2510
USP 25 class VI (physiological non-toxic)
FM-4910 listing)
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
Labeling Brand Name
Product Description
Code Number
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.

Pipe, PN 16, PVDF-Standard 25/50

• 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

d(mm) FM Part No. lbs/meter e(mm) di(mm)
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

Pipe, PN 16, PVDF-Standard

Model: • Material: PVDF • Supplied in 5m (16.4 foot) length • Material: PVDF * on request

d(mm) FM Part No. lbs/meter e




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

Pipe, PN 10, PVDF-Standard

• Material: PVDF
• Supplied in 5m (16.4 foot) length

d(mm) PN(bar) FM Part No. lbs/meter e(mm) di(mm)
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/Temperature Diagram

Application Limits of Pipes and Fittings Made of Thermoplastic Materials
(25 years operation with safety factor incorporated )
  • Material
  • PVDF
  • Colour
  • Natural
  • Dimensions
  • Standard length: 5 m
  • Note
  • Other lengths on request
  • Standards
  • ISO 10931
Pressure Pipe SDR 41 SDR 33 SDR 21 SDR 17.6 SDR 17 SDR 11 SDR 7.4
16 1.9
20 1.9
25 1.9
32 2.4
40 2.4
50 3.0
63 2.0 3.0
75 2.3 3.6
90 2.8 4.3
110 3.4 5.3
125 3.9 6.0
140 4.3 6.7
160 4.9 7.7
180 5.5
200 6.2
225 6.9
250 7.7
280 8.6
315 9.7


Pressure pipes for PRESSURE PIPE connection system by butt or socket welding.
Technical specifications
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
Material PVDF
  • Material
  • PVDF
  • Colour
  • Natural
  • Dimensions
  • Standard length: 5 m
  • Non-standard lengths on request
  • Note
  • with or without pre-treated
    surface for direct lamination
  • Standards
  • ISO 10931
Liner pipe, pre-treated Liner pipe, untreated
d mm e mm emm
32 2.4
40 2.4
50 3.0
63 3.0
75 3.0 3.0
90 3.0 3.0
110 3.0 3.0
125 3.0 3.0
140 3.0 3.0
160 3.0 3.0
180 3.0 3.0
200 3.0 3.0
225 3.0 3.0
250 3.0 3.0
280 3.5 3.5
315 4.0 4.0
355 5.0 5.0
400 5.0 5.0


Regression coefficients according to
ISO 10931 for MRS


For water and non-hazardous fluids
for which the material is classified

pectancy 25 years). In other cases,

a reduction of the nominal pressure
PN is required.

Installation instructions

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:

  1. Start winding some PTFE sealing tape on the outside of the threaded male end, taking care not to obstruct the through-hole on the pipe, fitting, or valve;
  2. Complete the first winding layer by winding the tape clockwise until you reach the root of the thread. Remember to keep the tape taut throughout the entire process;
  3. Press on the tips of the thread to make sure the tape adheres fully to the support clip;
  4. Increase the thickness of the PTFE layer by continuing to apply the taut tape and winding it clockwise until you achieve the optimal level;
  5. Connect the previously sealed male end to the female end and proceed manually by screwing the two elements;
  6. Make sure the layer of PTFE is not removed during screwing, as this would compromise the hydraulic seal of the joint;
  7. Complete screwing the two ends exploiting the entire length of the thread with the aid of a strap wrench or similar tool;
  8. Avoid tightening the elements too much, as this could damage the threads or cause stress to the elements themselves.

For flanged joints:

  1. Insert the possible backing ring onto the pipe, before proceeding with the installation of the stub;
  2. In the event of a fixed flange, check the drilling is correctly aligned with the counter flange;
  3. Check that the position of the counter flange takes into account the overall dimensions of the face to face distance of the components;
  4. Insert the flat gasket between the stubs (this step is not necessary for butterfly valves), making sure the sealing surfaces of the flanges to be welded have not been separated by an excessive distance, since this would cause it to compress;
  5. Proceed with solvent welding or welding of the fixed flanges or stub (in the case of backing rings) following the welding or solvent welding instructions provided by FIP;
  6. Insert all the bolts, washers, and nuts;
  7. Once the cooling time is up, proceed with tightening the bolts in a “cross-wise” order;
  8. Complete the bolt tightening process using a torque wrench until the tightening torque values shown in the table are reached.

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