Oil Refineries

The challenge

Refineries run on rolling turnaround programmes and every outage window matters. Furnace repair, heat exchanger overhaul, process piping replacement, and new equipment installation all compete for the same narrow window. The welding subcontractor who shows up needs to arrive qualified, briefed on the plant’s PTW system, and ready to produce traceable weld output from day one — with no ramp-up time available.

Refinery work is also some of the hardest industrial welding in Europe. Confined spaces, overhead positional work, high preheat requirements, and consequence-sensitive inspection criteria all apply. The margin for error is narrow; the cost of a rework is an extended outage.

What we deliver

• Furnace repair welding — confined and hard-to-access area welding on furnace tubes, headers, and tube-to-header connections
• Process piping installation and repair — carbon steel, stainless, and alloy service lines
• Equipment installation and tie-in — replacement of pumps, exchangers, columns, and drums with welded tie-in spools
• Turnaround campaign execution — integrated crew delivery across back-to-back outage windows

Standards and codes

• ISO 3834-2 — comprehensive welding quality
• EN 13480 — metallic industrial piping
• ASME B31.1 / B31.3 — where applicable per plant code
• PED 2014/68/EU — pressure equipment compliance
• EN ISO 9606-1 — welder qualification
• Client plant-specific WPS and PTW procedures

How we integrate

Refinery turnarounds live and die on plant procedure adherence. Our crews arrive pre-inducted on client HSE and PTW. Our welding supervisor attends the daily turnaround programme meeting. Our output is logged into the main contractor’s QA/QC system as it’s produced — not after.

We’re not trying to replace the main contractor’s project management. We’re trying to be the welding discipline that slides cleanly into their programme.

Selected project

St1 Refinery, Sweden — Three-phase turnaround campaign

November 2024 through April 2025. Three consecutive St1 outage windows — furnace repair in Phases 1 and 2, equipment installation in Phase 3. Delivered via WP Welding AB. The project is the proof point behind our back-to-back turnaround capability.

→ Read the full case study

Why refineries bring MIDAS on

• Back-to-back delivery capability — proven across the three St1 campaigns
• Welding coordination discipline under EN ISO 14731 framework
• Full material traceability on every weld
• Nordic main contractor partnerships — plug-in deployment, no management overhead

Request a quote

If you have a refinery turnaround coming up and need a welding subcontractor that can deliver the window without adding complexity to your programme, send us the scope.

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