EWC Code
Mineral-based non-chlorinated insulating and heat transmission oils
EUR-Lex Commission Decision 2000/532/EC — Official Journal L 226, 06/09/2000Annual Volume (EU)
280,000 tonnes/year EU waste transformer and heat transfer oil
Valorisation Range
€95M waste transformer oil management market
Primary Route
Transformer oil reconditioning and re-refining
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Get contacts for EWC 13 03 07EWC 13 03 07 is a specific sub-code under EWC 13 03 — Waste insulating and heat transmission oils. The classification guidance below applies to this waste stream.
Waste insulating and heat transmission oils include waste transformer oil, waste capacitor oil and waste synthetic heat transfer fluid from industrial processes. Transformer oil (predominantly mineral oil, some synthetic ester) serves as both electrical insulator and cooling medium in high-voltage transformers. EU transformer oil inventory is approximately 800,000 tonnes; oil is replaced when electrical breakdown voltage or acidity falls below specification.
Legacy transformer oils containing polychlorinated biphenyls (PCBs) are classified hazardous (13 03 01*) regardless of concentration. PCB Directive 96/59/EC required decontamination or disposal of all PCB-containing equipment by 2010; however residual PCB-contaminated equipment remains in some member states. Testing of transformer oil for PCBs by EN 61619 is mandatory before any management decision. Confirmed PCB-containing oil requires licensed PCB destruction facility.
Non-PCB transformer oil not qualifying for reconditioning is managed under waste oil hierarchy. Reconditioning by filtration, vacuum dehydration and inhibitor addition extends service life; fully degraded oil is collected for re-refining. Synthetic heat transfer fluids (glycol-based, diphenyl/diphenyl oxide mixtures, silicone oils) require specialist management routes as they are not compatible with mineral oil re-refineries.
Typical Generators
Established valorisation pathways for EWC 13 03 07, ranked by economic value and market depth.
Mildly degraded transformer oil is reconditioned by vacuum dehydration, filtration to remove particles and inhibitor replenishment, extending service life by 5–10 years. Fully degraded oil is re-refined by vacuum distillation and clay treatment to recover base oil meeting IEC 60296 transformer oil specification.
All transformer and capacitor oils must be tested for PCBs before any management operation. Oils confirmed containing PCBs above 50 ppm (or equipment above 500 ppm) must be decontaminated or disposed under PCB Directive 96/59/EC at licensed high-temperature incineration facility (>1100°C with 2-second residence time).
Synthetic heat transfer fluids not compatible with mineral oil re-refinery routes are incinerated in hazardous waste incinerators with energy recovery. Diphenyl/diphenyl oxide fluids (Dowtherm A, Therminol) generate high calorific value off-gas suitable for steam generation. Glycol-based fluids may be treated separately.
These are the established routes for EWC 13 03 07. Which one your stream qualifies for depends on its composition, volume and region.
Get the ranked options for your streamPrimary & secondary off-takers
Manage waste transformer oil from substation maintenance and transformer replacement programmes
Re-refine collected non-PCB waste transformer oil to base oil for electrical insulating oil formulation
Process PCB-contaminated transformer oil at licensed high-temperature incineration facility
Collect and test transformer oils for PCB content before routing to appropriate management facility
Sectors that valorise EWC 13 03 07 as an input material or secondary raw material.
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