Steel Production

The challenge

Steel production facilities — traditional mills and the new wave of green steel plants — need extensive welded piping infrastructure. Large-diameter carbon steel pipelines carry hydrogen, gases, cooling water, and process fluids. Heavy-wall pressure piping connects process islands. Prefabrication output needs to scale across diameters from small-bore instrument and process lines through to DN2000 heavy-section headers.

Greenfield steel projects generate demand faster than most specialist welding contractors can supply. And the new green-steel segment — hydrogen-based direct reduction replacing blast furnaces — is the biggest industrial decarbonisation wave in Europe. These projects are setting the template for the next decade of heavy-industrial welded piping demand.

What we deliver

• Large-diameter pipe prefabrication — carbon steel from DN25 precision work to DN2000 heavy-section headers
• Pipe spool fabrication and welded assembly with full traceability
• Welding to ISO 3834-2, EN 13480, EN 1090
• Test pack documentation per spool

Standards and codes

• ISO 3834-2 — comprehensive welding quality
• EN 13480-4 — metallic industrial piping fabrication and installation
• EN 1090-2 — structural steel execution
• EN ISO 15614-1 — welding procedure qualification
• EN ISO 9606-1 — welder qualification
• PED 2014/68/EU — pressure equipment where applicable

Diameter and thickness range

• Diameter: DN25 through DN2000
• Wall thickness: 2 mm through 60 mm
• Processes: 141 TIG root, 135 MAG fill/cap, 121 SAW on large-diameter positioner, 111 SMAW

The DN2000 capability is specifically what differentiates us from most small and mid-sized welding subcontractors. Large-bore welding at this scale requires rotating positioners, heavy rigging, and multi-pass welding discipline. We deliver that.

Selected project

Stegra, Sweden — Large diameter pipe prefabrication for green steel

September-December 2025. Four months of carbon steel pipe prefabrication for the Stegra (formerly H2 Green Steel) facility in Northern Sweden — one of Europe’s flagship green steel investments. DN25 through DN2000. Delivered via WP Welding AB.

→ Read the full case study

Why steel producers and EPC main contractors bring MIDAS on

• Proven large-diameter capability — DN2000 delivered at Stegra
• Full range execution — same crew handling DN25 precision and DN2000 heavy work
• Nordic main contractor partnerships — WP Welding AB
• Green transition readiness — Stegra is the proof point

Request a quote

If you’re building out a steel production facility — traditional or green — and need a prefabrication subcontractor with proven large-diameter capability, send us the isometric package.

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