Fluid & Gas Handling Applications

Fluorinated plastics Halar® ECTFE, Solef® PVDF, Hyflon® PFA/MFA® and Algoflon® PTFE, are ideal when excellent temperature and chemical resistance are required. Extruded or molded components include tubes, pipes, hose, column packing, pumps, valves, fittings, gaskets and expansion joints. Small items can economically be made entirely of fluoropolymers. Certain heat exchangers, used in very acidic media, have entire components made of Hyflon® PFA or MFA®.

Hyflon® MFA®   

The Hyflon® MFA® surface is up to 5 times smoother than standard PFA, improving cleanliness, reducing pressure drop, and reducing wall build up in problematic slurries or mixtures. It is designed to give much better physical properties than FEP, lower creep and improved stress cracking resistance. Like PFA, Hyflon® MFA® offers the highest temperature rating and broadest chemical resistance of all melt processable fluoropolymers. MFA® has a continuous use temperature of 225°C. 

Solef® PVDF  

Thanks to their unique properties mix, PVDF have a large variety of applications. In the chemical industry PVDF is also often used as protective linings against corrosive chemicals for pump bodies to convey corrosive fluids. We can also find pressure piping systems in PVDF which are in most cases welded. Situated between chemical industry and domestic piping, chemical waste piping is another important application of PVDF. In other industries, purity is the key property. This is the case of the pharmaceutical industry, where the intrinsic purity and chemical resistance of PVDF piping systems are well appreciated.

Halar® ECTFE 

Halar® ECTFE coatings are recommended for high purity fluid systems in the chemical industry, particularly where the process surface must be smooth, pure (low extractables), and chemically resistant. Halar® ECTFE powder coatings are used in the presence of extremely aggressive chemical environments. Moreover, the extremely smooth and chemical resistant surface of Halar® ECTFE prevents microbial growth.

Algoflon® PTFE

Outstanding chemical inertness in aggressive environments, thermal resistance, electrical properties, and non-stick characteristics in a wide range of temperatures from cryogenic to 260°C. This makes Algoflon® PTFE the ideal material for many critical applications. In particular, Algoflon® DF powders are currently used for the production of pipe and tubing by paste extrusion meeting the demanding requirements of the chemical industry.

 

Multilayer Pipes

Solef® PVDF

Solef® PVDF is a semi-crystalline, melt-processable fluoropolymer that offers excellent resistance and barrier properties to many chemicals combined with exceptional fatigue resistance and long-term hydrostatic strength. It has been used successfully in the chemical industry for more than 30 years. Solef® PVDF has also been used for decades in the semiconductor and oil & gas industries as well as for domestic plumbing systems.

Key features

  • Excellent resistance to chemicals, in particular to acids
  • Outstanding long-term hydrostatic strength
  • Exceptional fatigue resistance
  • Good barrier properties against a broad range of chemicals
  • UV resistance for outdoor applications
  • Resistant to flame propagation

Moreover Solvay can offer compounds for chemical industry applications, for Gas and Fluid transport and industrial applications.

Performance Data

Chemical resistance and temperature rating

Fluoropolymer chemical resistance and temperature rating

Fluoropolymer-chemical-resistance-and-temperature-rating2
Fluoropolymer-chemical-resistance-spider-graph

 

 

Chemical

Formula Concentration Maximum Temperature (°C)
Inorganic Acids
Hydrochloric HCl 37% 140
Nitric HNO3 50% 100
65% 75
Sulfuric H2SO4 80% 125
97% 23
oleum not resistant
Bases
Ammonium hydroxide NH4(OH) 30% 23
Sodium hydroxide NaOH 50% not resistant
Hydrocarbons
n-Hexane CH3(CH2)4CH3 100% 140
Toluene C6H5CH3 100% 100
Alcohols
Methanol CH3OH 100% 50
Ethanol CH3CH2OH 100% 100
Organic acids, esters and ketones
Acetic acid CH3COOH 100% 50
50% 75
Acetone CH3COCH3 100% not resistant
5% 75
Classic polymer solvents
Dimethylformamide CH3CON(CH3)2 100% not resistant
Dimethylsulphoxide CH3SOCH3 100% not resistant
Halogenated solvents
Chlorobenzene C6H5Cl 100% 50
Chloroform CHCl3 100% 50
Amines and nitriles
Acetonitrile CH3CN 100% not resistant
Aniline C6H5NH2 100% 50
Peroxides
Hydrogen peroxide H2O2 30% 50
Fluids used in the automotive industry
Crude oil   100% 140
Mineral oil   100% 140
Biofouling prevention

Highest Cell Count/cm2 - Flow Velocity at 3

Fluoropolymer-cell-count-flow-velocity

 

Hydrostatic strength

Solef® PVDF Hydrostatic Resistance

Solef-hydrostatic-strength

 

Fatigue resistance

Sinus 1 Hz - R = 0.1 - Controlled by force - Sample ISO1

Fluoropolymer-fatigue-test

 

Bursting resistance

Fluoro- and Non Fluorinated Bursting Resistance (@ 23°C and 100°C)

Fluoropolymers-bursting-resistance

Permeability

Water permeability

Solef-water-permeability

 

Oxygen permeability

Solef-oxygen-permeability

 

Methane permeability

Solef-methane-permeability

 

UV resistance

 

Initial Properties
  UL 94 
Flame test class
V-0
  Tensile impact test 
[kJ/m2 (ft∙lbf/in2)]
81 (38.5)
  Tensile strength 
[MPa (psi)]
45 (6,525)
Percent retention after conditioning
1000 h UV UL 94 Flame test class V-0
  Tensile impact test 99
  Tensile strength 100
7 days water 
@ 70ºC (158ºF)
UL 94 Flame test class V-0
  Tensile impact test 100
  Tensile strength 95

Artificial Aging using Xenon-Arc WOM and Water Exposure (UL 746C)

Test conditions

  • Solef PVDF 6008 plates - 1 mm thick
  • Tensile impact test measured in accordance with ASTM D 1822
  • Tensile strength measured in accordance with ASTM D 638

 

Flame resistance

LOI of Solef® and Hylar® PVDF Resins and Various Thermoplastics

Fluoropolymer-fire-resistance

 

Protective linings in reactors and tanks fabricated with Halar® ECTFE, Solef® PVDF, Hyflon® PFA/MFA® and Algoflon® PTFE granulars, provide excellent resistance to extreme chemicals and temperatures.

Fluoropolymer lining systems are an alternative method to using specialty alloys such as stainless steel, titanium, Inconel® or Hastelloy® for corrosion control purposes. Significant cost savings can be achieved and a reliable system specified by appropriate selection and application of fluoropolymer lining systems.

Halar® ECTFE, Solef® PVDF, Hyflon® PFA/MFA®, and Algoflon® PTFE are used as continuous linings within FRP dual laminate or steel substrates. Extruded liners can be pulled into steel pipe or over-wrapped with FRP in a dual laminate construction.

Thicker linings provide much better protection against permeation and abrasion. These linings can be applied through rotomolding or transfer molding, as found in most pumps, valves and fittings, or through sheet lining. The latter process may be a loose liner as in many PTFE applications or may use adhesives to bind the fluoropolymer to a surface.

Maximum service temperature of fluoropolymers (compared with PP)

Fluoropolymer-service-temperatures

 

Chemical resistance in H2SO4

Fluoropolymer-chemical-resistance-in-h2so4

 

Permeation resistance in acids

Fluoropolymer-permeation-resistance-in-acids

 

CI2 permeability

Fluoropolymer-CI2-permeation-resistance

 

HCI Permeability

Fluoropolymer-HCI-permation-resistance

 

High Temperature Coatings

Ultra and High-Performance Polymers for Coatings

Our powders and water-based solutions offer exceptional chemical resistance and adhesion, improved scratch resistance and thermal stability.

Typical Applications

  • Corrosion resistant coatings
  • High-temperature coatings
  • Primers for non-stick coatings
  • Abrasion resistant coatings

Key features

  • Long-lasting performance in aggressive environments
  • Better adhesion to metallic and polymeric substrates
  • Excellent chemical and oxidative resistance
  • Micropowders for improved processing
  • Water-based formulations

Torlon® AI (polyamide-imide) – thermoplastic, amorphous polymers available in water-soluble versions that possess exceptional mechanical, thermal, chemical resistance as well as wear-resistant properties. They are inherently non-flammable, have outstanding electrical properties, and possess enormous temperature stability from cryogenic to 300°C and some grades are FDA compliant.

Veradel® polyethersulfone (PESU) – is a water-dispersible polymer powder that is FDA-compliant with excellent quality and product consistency. It has an HDT of 204°C, is inherently non-flammable, optically clear and provides good chemical resistance to strong acids and bases. Its range of molecular weights and low viscosity allows for easier processing. It offers good adhesive properties to a wide range of metals, including stainless steel and aluminum.

KetaSpire® PEEK (polyetheretherketone) – is a semi-crystalline thermoplastic that that is FDA-compliant and has outstanding chemical resistance to organics, acids, bases and steam/hot water. It is an ideal material for applications that are exposed to extreme conditions such as wear, abrasion and high temperatures up to 315°C. It is available in both powders and fine powders.

Radel® PPSU (polyphenylsulfone) – super-tough transparent polymer that is FDA compliant with an HDT of 405°F (207°C), excellent chemical resistance and the unique ability to be steam sterilized without significant loss of properties.

Xydar® LCP (liquid crystal polymer) – high-temperature, liquid crystal polymer with an HDT of 570°F (300°C), and extremely high chemical resistance when applied as a thermally-sprayed powder coating.

 

High Purity Coatings

Clean Room process equipment must be constructed of high purity, chemically-inert and fire-safe materials.

Hyflon® PFA/MFA® powders are high purity products that can be used for anti-stick coatings for use in pharmaceutical and high purity process equipment where good release properties and high purity and excellent temperature and chemical resistance are required.

Halar® ECTFE is used as a lining and coating for ultrapure water systems in the pharmaceutical and chemical industry.

Halar® ECTFE has complete chemical compatibility handling the full pH range and is ideal for alkaline chemistries.

Moreover, it meets the demands for fire-safe, non-fire propagating plastics.

It is approved and listed to the FM Global 4910 Clean Room Fire Safety Protocol and has been tested and meets the UL 2360 Fire-Safe Clean Room Materials Standard.

 

Exhaust Duct Coatings

Halar® ECTFE fluoropolymer coatings provide outstanding properties:

  • Chemical resistance
  • Barrier properties
  • Outperform plastic and FRP duct with improved safety and corrosion resistance
  • Reduction or elimination of the buildup of salt deposits and debris that can reduce airflow approved by Factory Mutual for use in fume and smoke exhaust systems, without sprinklers.

Typical application

Halar® ECTFE coated stainless steel exhaust duct systems are designed to handle a wide range of corrosive exhaust streams found in a variety of industrial applications, including clean rooms.

Filtration & Separation

Solef® PVDF, thanks to its unique properties, is ideal for the production of filter cartridges and housings.

Halar® ECTFE is a fluoropolymer used to create melt-blown fiber that offers the chemical and temperature resistance properties not available in polypropylene, polyethylene and other non-wovens:

  • Inertness
  • Low surface energy
  • Small fiber size

 

Typical application

Non-wovens for the separation of immiscible liquids or the elimination of mists in systems containing aggressive chemicals.

Fully fluorinated perfluoropolymer yarns and fibers made from Hyflon® MFA® are a unique product for high performance filtration.

  • MFA® is impervious to virtually all industrial chemicals over a wide temperature range, with the same corrosion resistance as PFA and PTFE
  • Excellent high use temperature capability
  • Very low critical surface energy
  • Excellent UV and weathering resistance
  • Very low flammability

 

Algoflon® PTFE offers key properties:

  • Excellent chemical resistance over a wide temperature range
  • No solvent content
  • Non-flammable
  • Low critical surface energy; highly water repellent

 

Moreover, when modified with Aquivion® PFSA, it shows from good to very good wettability properties. Being a biphasic polymer with interpenetrating networks of PTFE-type semi-crystalline perfluoropolymer domains and water-containing channels with hydrated ionic groups, Aquivion® PFSA can be used, in fact, to modify hydrophobic surfaces of fluorinated polymers such as PTFE. After such treatment, performed on micro- or nanoporous PTFE webs (after structure formation), liquid mass flow is substantially increased.

Typical applications

  • Algoflon® D dispersions: impregnation filtration fabrics (both woven and non-woven)
  • Algoflon® DF powders: production of expanded PTFE or PTFE fibers filtration media with unique release properties combined with very high chemical and thermal resistance
  • Algoflon® granulars: can be molded and skived to very low thicknesses to obtain filter filaments