Repair Welding for Critical Industrial Repairs

Damage assessment

Whether a component can be repaired depends on the base material, material thickness, location and extent of the damage, and the loads acting on the component during operation. Previous repairs and heat treatments may also affect the repair strategy.

When investigating a crack, we look beyond the crack itself. Misalignment, overloading, wear or vibration may have caused the failure. If that cause is not addressed, the damage may return after welding.

Using the available technical information, we determine whether repair is feasible and which method is required. If replacement is the safer or more economical option, we will say so.

Preparation and welding

Critical repair welding requires a procedure suited to the material and its application. Our engineering team supports the preparation with measurements, technical drawings and calculations where required. This information is used to determine the joint preparation, welding sequence and welding procedure.

Heat input is controlled throughout the work to limit distortion and unwanted changes in the surrounding material. With sensitive steel grades, particular attention is paid to the heat-affected zone. Excessive hardness can increase susceptibility to cracking, while excessive softening may reduce strength or wear resistance.

Depending on the material, thickness and application, the repair method may include controlled preheating, monitoring of the interpass temperature and suitable heat treatment.

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Welding and machining

Machining is often required after welding to restore dimensions, fits or alignment. In other cases, the structure must be modified or reinforced to prevent the damage from recurring.

Mantrec brings engineering, welding, fabrication and machining together within one organisation. The work can therefore be coordinated as a single technical process, with one party responsible for the complete repair.

One organisation, one responsibility

What sets Mantrec apart is that engineering, welding, fabrication and machining are not coordinated between separate parties, they are carried out within one organisation, under one roof and one responsibility. Most welding contractors focus on execution. Most engineering firms focus on design. Mantrec does both, which means the analysis that determines the repair method is done by the same team that carries it out. There is no gap between advice and action, and no moment where responsibility shifts.

On-site repair welding

For large installations, dismantling and transport may take longer than the repair itself. Where working conditions allow, Mantrec carries out the repair on site. The job is prepared to the same technical standard as work performed in our workshop.

Access to the component, surrounding structures, operating conditions and site safety requirements are considered during preparation. When required, repair welding can be combined with on-site machining.

This approach is used for recycling equipment, bulk-handling systems, heavy machinery and steel structures where extended downtime has a significant operational impact.

Request an initial assessment

Send us clear photographs, any available drawings and material information, together with a short description of the damage and the function of the component. If known, include how the damage occurred and the time available for repair.

We will use this information to make an initial assessment of the technical and economic feasibility. If further investigation is required, we will discuss it with you before preparing a repair proposal.

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Steel welding

Stainless steel welding

Aluminium welding

Structural welding