Australia Surface Treatments

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Defence Department
VISY
Alcoa
Nestlé
Fonterra
Saputo
ARYZTA
George Weston Foods
Allied Pinnacle
Laurent
Mackies Bakeware
American Pan
KAAK
KEMPF
SASA
Latrobe Magnesium
Goodman Fielder
Pfizer
Rio Tinto
Defence Department
Industries

Protective Coating Services for Oil & Gas Equipment

AST provides specialised fluoropolymer and protective coating services for oil and gas and related process industries. Typical applications include valves, diverters, pipes, spools and fabricated process assemblies operating in corrosive, chemically aggressive or maintenance-intensive environments.

AST is the only licensed industrial fluoropolymer applicator in Australia, New Zealand and South East Asia — with technical and quality audits by Chemours Global and a lifetime warranty on workmanship.

AST Halar (ECTFE) and Tefzel (ETFE) coated pipe spools and flanged fittings for oil and gas process service

Valve and Diverter Coating Services

Valves and diverters often require more than a general-purpose surface treatment. In many cases, the requirement is for chemical resistance, corrosion protection, reduced fouling or a durable fluoropolymer barrier lining that supports longer service life under demanding process conditions. AST supports customers who need practical coating protection for flow-control equipment exposed to aggressive media, corrosive compounds or difficult cleaning environments.

  • Gate, ball and butterfly valves
  • Diverters and flow-control bodies
  • Valve internals and seats
  • Associated fittings and hardware

Pipe and Spool Coating Services

Pipes and spools used in process industries commonly require heavy-duty fluoropolymer lining systems where media compatibility and barrier performance are essential. AST positions this capability around practical industrial outcomes including resistance to aggressive chemical environments, support for equipment longevity and restoration of valuable fabricated assets.

  • Process pipes and lined spools
  • Fabricated pipework assemblies
  • Flanged connections and fittings
  • Refurbishment of existing pipework

Protective Fluoropolymer Linings for Process Equipment

Halar coating is associated with ECTFE barrier linings for chemical resistance, while Tefzel coating is linked to ETFE-based protective fluoropolymer systems used where durability, corrosion resistance and process suitability matter.

Halar coating services →Tefzel coating services →

For oil, gas and process industries, supplier credibility matters where coating performance is tied directly to asset life and maintenance risk. AST is the only licensed industrial fluoropolymer applicator in Australia, New Zealand and South East Asia, with technical and quality audits by Chemours Global. AST also provides a lifetime warranty on workmanship.

Coating Selection

Halar vs Tefzel vs PTFE for Oil & Gas Service

Selecting the right fluoropolymer for oil & gas service depends on duty profile — chloride exposure, temperature, pressure, abrasion and the dominant failure mode you're engineering against. The table below summarises how AST positions Halar (ECTFE), Tefzel (ETFE) and PTFE across typical oil & gas duties.

AttributeHalar (ECTFE)Tefzel (ETFE)PTFE
Permeation barrierBest of fluoropolymers — 10–100× better than PTFEStrong — close to HalarMicroporous — lowest of the family
DFT (typical)300–1000 µm thick-film lining300–1000 µm thick-film lining~20–75 µm
Service temperature−76°C to +150°C continuous−76°C to +150°C continuousUp to 260°C continuous
Sea water / chloride immersionIndustry-standard — desalination, sea-water injection, marine pipeworkSuitableRisk of under-film corrosion / blistering
Acids, alkalis, oxidisersExcellent — incl. NaOCl, H₂SO₄, HCl, NaOHExcellentExcellent — broad chemical inertness
Abrasion / mechanicalExcellent — rigid thick-filmExcellentModerate
Holiday / spark testingRequired — 2–3 kV/mm wet sponge, documentedRequired — 2–3 kV/mm wet sponge, documentedNot required
NSF/ANSI 61 (potable water)Yes — FDA-compliant grades availableFDA-compliant grades availableFDA-compliant grades available
Best fit (oil & gas)Continuous chloride / sea-water immersion; biofouling-controlled (NaOCl-dosed) systems; valve internals on aggressive dutyThick-film chemical lining; static mixers; chemical-injection equipment; pipe spoolsRelease / non-stick on intermittent service; low-friction valve trim; release of viscous hydrocarbons

Components AST coats for oil & gas

  • Valve bodies and internals — gate, ball, butterfly, control valves; trim, seats, plugs, cages
  • Hydraulic accumulator shells — internal PTFE thin-film for OEM and refurbishment work
  • Pipe spools and fabricated pipework — Halar / Tefzel thick-film lining for chemical-injection and sea-water service
  • Static mixers — header spools, tube spools, mixing elements (PTFE or Tefzel)
  • Strainer housings and baskets — internal Halar barrier lining for corrosive service
  • Diverters and flow-control bodies
  • Anti-corrosion fastener coatings — Xylan dry-film for offshore use

QA package included on every job

  • Documented surface preparation record — blast profile, cleanliness, SA 2.5 verification
  • Visual inspection at each coat
  • Dry film thickness verification — ASTM D7091, calibrated probe, multi-point
  • Holiday / spark testing — Halar and Tefzel, 2–3 kV/mm wet sponge, pass/fail recorded
  • Oven cure verification — peak metal temperature trace held against cure schedule
  • Material Certificate of Conformity — Chemours / Solvay batch numbers recorded
  • Photographic record issued with finished job

For more on chemistry selection, see our Halar (ECTFE) coating, Tefzel (ETFE) coating, PTFE / PFA / ETFE / ECTFE comparison and chemical compatibility guide.

Process Hardware Linings

Spools, vessels and skid-mounted equipment

Halar (ECTFE) and Tefzel (ETFE) barrier linings on pipe spools, pressure vessels and fabricated process assemblies — with full holiday/spark testing and material Certificate of Conformity on every job.

Fluoropolymer-coated pipe spools and flanged process fittings
Coated pipe spools and flanges
Coated pressure vessels and process pipework on a process skid
Coated vessels and pipework
Skid-mounted coated process equipment, pumps and piping
Skid-mounted process equipment

Frequently Asked Questions

What fluoropolymer coatings are used on oil and gas equipment?
Oil and gas applications typically use ETFE (Tefzel) coating or ECTFE (Halar) coating for valves, spools, diverters and process assemblies where chemical resistance, corrosion protection and durable service performance are required. Tefzel is commonly specified for protective fluoropolymer performance on valves and spools, while Halar is selected where barrier lining and strong chemical resistance are the primary requirements.
Halar vs Tefzel vs PTFE — which to choose for oil & gas service?
Halar (ECTFE) is the industry-standard answer for sea water immersion, chloride-rich service, sodium hypochlorite dosing, and chemical-injection skids — it has the best permeation barrier of the fluoropolymer family and supports thick-film lining (300–1000 µm). Tefzel (ETFE) is the right choice for thick-film chemical lining where slightly lower service temperature is acceptable in exchange for easier handling and a different cure profile. PTFE is suitable for low-pressure non-stick / release applications and as a base layer for valve trim — but its microporous structure makes it the wrong tool for continuous immersion in aggressive chloride or oxidising service. AST applies all three under the same licensed Chemours / Solvay programs.
Can existing oil and gas valves and spools be recoated?
Yes. AST supports both new fluoropolymer coating projects and refurbishment of existing valves, spools, diverters and process hardware. Where equipment has experienced coating degradation or corrosion damage, AST can strip, re-prepare and recoat to restore protective performance and extend service life.
What is the difference between Tefzel and Halar for oil and gas applications?
Both Tefzel (ETFE) and Halar (ECTFE) are fluoropolymer systems relevant to oil and gas applications. Tefzel is commonly used on valves and spools where durable industrial protection and corrosion resistance are the primary requirements. Halar provides stronger barrier lining performance and is preferred where aggressive chemical exposure or permeation resistance is the main concern.
What QA documentation does AST provide for oil & gas projects?
Every AST oil & gas job is delivered with a documented QA package covering surface preparation records (blast profile, cleanliness check), visual inspection at each coat, dry film thickness verification (ASTM D7091), holiday/spark testing for Halar and Tefzel systems (2–3 kV/mm wet sponge method), oven thermocouple cure trace, and material Certificate of Conformity with Chemours / Solvay batch numbers. AST is not currently AS9100 certified — programme-level aerospace or oil & gas qualification (PPAP, FAI, ITP) is the customer's responsibility but AST supports it with documentation by agreement.
Who provides protective coating services for oil and gas equipment in Australia?
AST (Australia Surface Treatments), based in Melbourne, Victoria, is the only licensed industrial fluoropolymer applicator in Australia, New Zealand and South East Asia. AST provides Tefzel and Halar coating services for valves, spools, process assemblies and fabricated equipment in oil and gas and related process industries, backed by technical and quality audits by Chemours Global and a lifetime warranty on workmanship.

Only licensed industrial fluoropolymer applicator in Australia, New Zealand and South East Asia

Yearly technical and quality audits by Chemours Global

Lifetime warranty on workmanship

Need a Quote for Your Equipment?

Talk to AST about your coating requirements, operating conditions and performance goals. Our team can review your application and prepare a technical quotation.

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