# Refinery feed of undetermined origin (balance gap), EU-27 (tin) – EU27, 2024

**3,172 t Sn**

- Fact ID: `PSNUE-W-WSAD-NIEUSTALONY`
- Label (PL): Wsad rafinerii o nieustalonym pochodzeniu (luka bilansu), UE-27 (cyna)
- Value (machine): 3172
- Standard deviation: 2056
- 90% interval (5th–95th percentile of Monte Carlo draws): -343 to 6458
- Unit: t Sn
- Period: 2024
- Area: EU27
- Metal: sn
- Verification: reconciled
- Note: Indicator from the reconciled 2024 balance; 90% interval (5th and 95th percentiles of 20,000 accepted Monte Carlo draws, each draw reconciled separately): from −343 to 6,458 t of contained Sn; standard deviation of these draws 2,056 t. Explicit balance gap (prior 0 ± 10,000 t), not a measurement; the interval includes zero. Interpretations: secondary raw material from the EU (central variant), imports under aggregate codes, end-of-life scrap or non-secondary raw material; alternatively – overstated production measurement by plant (K1).
- Source: Tin flow in the EU-27, 2024 balance – model estimates with a wide uncertainty interval (ai-waw.com) – https://ai-waw.com/przeplyw-metali/przeplyw-cyny-ue (class C, primary data under the publishers' licences; calculations by ai-waw.com)
- Publisher: ai-waw.com (calculations); data: Eurostat, mining statistics, World Mining Data, ITA, BGS, company reports, EEA, ECHA, EU legal acts, EC, SCRREEN, JRC, peer-reviewed literature
- Metal flow analysis: [AIWAW-2026-PSNUE – EU-27 Tin Flows](https://ai-waw.com/en/metal-flows/eu-tin-flow-analysis.md)

Cite: ai-waw.com, AIWAW-2026-PSNUE v1.1, fact PSNUE-W-WSAD-NIEUSTALONY – https://ai-waw.com/przeplyw-metali/przeplyw-cyny-ue