Megasa Siderúrgica Narón steel plant

Megasa Siderúrgica Narón steel plant is a steel plant in Spain with a reported capacity of 700,000 t of steel. Steel plants burn coal in blast furnaces or use electric arcs to melt scrap; in both cases the molten metal must be kept above 1,500°C and transferred through extensive hot piping and vessels. It is operated by Megasa Siderurgica SL. By capacity it ranks #8 among 8 steel plants in Spain. It emits about 70,159 t CO₂e a year from Climate TRACE, roughly comparable to the annual emissions of 16k passenger cars. Its CO₂ per unit of capacity is 89% below the national median for this sector.

Facility data: Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0), id ct-1566809.

In context: how this facility compares

At 700,000 t of steel, Megasa Siderúrgica Narón steel plant is below the median steel plant in Spain (1,300,000 t of steel). Subsector: iron-and-steel. As steel plant, it requires high process heat (typically 800–1500°C) for its core industrial operations — heat that must be supplied by boilers, furnaces or direct combustion, and losses through uninsulated vessels and piping represent wasted fuel. Removable modular insulation can cut those losses by 80–96%, surface-cooling equipment to ≤45°C, with payback often under 2 years. Steel plants burn coal in blast furnaces or use electric arcs to melt scrap; in both cases the molten metal must be kept above 1,500°C and transferred through extensive hot piping and vessels.

Capacity & CO₂-intensity comparison computed from Climate TRACE industrial facilities data; sector role based on engineering reference.

What 70,159 t CO₂e a year looks like

This facility's reported annual CO₂e in everyday equivalents from the US EPA Greenhouse Gas Equivalencies calculator:

Equivalencies: US EPA Greenhouse Gas Equivalencies. Emissions: Climate TRACE.

Capacity vs largest steel plants in Spain

Reported capacity (t of steel), Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0).

Operator

Operated by Megasa Siderurgica SL.

Local climate

Megasa Siderúrgica Narón steel plant sits in a warm-summer Mediterranean climate zone (Köppen Csb), at 43.5°N in the northern hemisphere.

Köppen zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid).

Site climate & environmental severity

The local climate sets how fast unprotected steel, protective coatings and the insulation on hot process equipment degrade at this site. It sits in a corrosive environment (estimated ISO 9223 class C4 — High), with marine corrosion the leading environmental stress.

In this site’s local climate, a bare 150 °C surface sheds about 1361 W/m² to ambient — roughly 1.05× the loss at a 20 °C reference; removable insulation recovers about 1293 W/m² of that. Reference-surface calculation at a 150 °C surface from WorldClim climate normals (ASTM C680 / ISO 12241) — an indicative per-climate comparison, not a measurement of this site’s specific equipment. Open method dataset: DOI 10.5281/zenodo.20787408 (CC BY 4.0).

Higher environmental severity is exactly where protective removable insulation pays back most: a sheltered micro-climate slows corrosion, UV and thermal-cycling damage and extends outdoor hardware service life. This is an indicative site-climate context — not a condition assessment of any specific plant or operator.

Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.

How it compares & nearby sites

The #8 largest of 8 steel plants in Spain by reported capacity.

Nearby industrial sites

• ALCOA INESPAL, S.A. - LA CORUÑA · Metals Plant · 112,000 t CO₂
• Repsol A Coruna Refinery · Refinery · 1,400,049 t CO₂
• ALUMINIO ESPAÑOL, SA · Metals Plant · 403,000 t CO₂
• San Ciprian alumina refinery · Aluminium Smelter · 1,860,213 t CO₂
• San Ciprian aluminium plant · Aluminium Smelter · 20,116 t CO₂
• Lugo Province · Aluminium Smelter · 94,176 t CO₂

Location

Coordinates 43.51411, -8.16427. View on OpenStreetMap.

Heat loss & insulation profile

For a steel plant, the main modular-insulation targets are reheat & annealing furnaces, ladles, hot-blast stoves, steam & gas ducting. Typical hot-surface ranges used for screening: 200–1,200 °C °C.

Indicative recoverable energy

A first-pass insulation screen suggests about 3,600 MWh/year of recoverable heat-loss reduction and about 1,200 t CO₂e/year of avoided emissions. Screening estimate scaled from installed process-heat projects and surface-temperature reduction data.

See Inzonex Modular Insulation → Run the calculator →

Screening calculation from facility class, capacity and open emissions/energy context. Engineering survey required before procurement.

Safety & the no-regret first step

Start with a thermal survey of valves, flanges, doors and bends. Removable modular insulation keeps maintenance access open while lowering exposed-surface temperature and wasted heat.

EU policy pressure on this sector

Obligation

This facility is inside the EU. For thermal equipment, insulation upgrades can support ETS exposure reduction and energy-efficiency compliance.

Sources: EU ETS, CBAM and national energy-efficiency schemes.

Frequently asked questions