Power Plants
Piping, fabrication, and mechanical service for power and geothermal plants
Héðinn supports power and geothermal facilities in Iceland with piping, pressure vessels, steel structures, and on-site mechanical service.
Mechanical engineering for Iceland's power and geothermal plants
Iceland's power supply is built on geothermal and hydroelectric generation, and these plants rely on heavy piping, pressure equipment, and steel structures that must perform under continuous load. Keeping them running calls for engineering and fabrication built for industrial conditions.
Héðinn works with power and geothermal facilities across the country, with work ranging from process piping and structural steel fabrication to the manufacture, installation, maintenance, and repair of critical plant and power generation equipment. Much of the plants' main process equipment, including heat exchangers, deaerators, and steam separators, is manufactured in-house. This work has included laying a long transmission pipeline to increase a geothermal plant's electricity and heat production, the kind of large-scale mechanical project the company is equipped to deliver.
Piping, pressure vessels, steel structures, and on-site service are available from the same team, so operators can plan projects and maintenance with one engineering partner.
Power Plant Capabilities
What Héðinn delivers for power and geothermal plants
From piping and pressure vessels to steel structures and on-site mechanical service.
Piping and pipeline work, from process piping to long transmission lines that carry steam, water, and heat.
- Transmission pipelines
- Process piping
- Installation
Pressure vessels and tanks fabricated to the standards required for power and geothermal service.
- Seperators and dearators
- Heat exchangers
- Cooling and cleaning towers
Structural steelwork and custom fabrication for plant buildings, supports, and equipment.
- Structural steel
- Custom fabrication
- Workshop capacity
On-site mechanical service and maintenance that keeps generating equipment available and reliable.
- On-site service
- Planned maintenance
- Repairs
Reference project: Hverahlíð Pipeline II
ON Power contracted Héðinn to lay a new steam transmission pipeline from the Hverahlíð boreholes to the Hellisheiði Power Plant: earthworks, pipeline installation, electrical installations, and construction work in one project.
Hverahlíð Pipeline II runs alongside the existing supply lines, mostly above ground and through existing concrete culverts.
One-metre-diameter pipes on concrete foundations, joined section by section along the route.
Each joint is circumferentially welded in place, about a kilometre of welding across the project as a whole.
Recent power projects
Projects for energy companies that Héðinn has worked on in recent years, as published in the company brochure.
| Project | Client | Year |
|---|---|---|
| DN1000 steam pipeline, Hverahlíð II | ON Power | 2023–2024 |
| Two deaerators, Hellisheiði Geothermal Plant | ON Power | 2025 |
| Four heat exchangers | Orkuveita Reykjavíkur | 2024 |
| Two steam separators and piping, Svartsengi | HS Orka | 2025 |
| Cooling and circulation systems, Búrfell | Landsvirkjun | 2024–2026 |
| Container heating stations | HS Orka / Civil Protection | 2024–2025 |
| Thermal power station expansion, Hellisheiði | ON Power | 2025–2026 |
From plant requirement to completed work
Power and geothermal projects follow a structured sequence from scope through fabrication, installation, and service.
Define the scope
Héðinn works with the operator to establish the mechanical scope, site constraints, and standards.
Engineering and fabrication
Piping, vessels, and steel structures are engineered and fabricated in the workshop.
On-site installation
Héðinn installs and integrates the work at the plant, coordinating around operations.
Service and maintenance
Ongoing mechanical service and maintenance keep the plant running between projects.
Send the plant project or maintenance question
Héðinn can scope piping, fabrication, and mechanical service for power and geothermal facilities, whether it is a new project or ongoing maintenance.
Gjáhella 4, 221 Hafnarfjörður | +354 569 2100 | hedinn@hedinn.is