QuantiServ’s very experienced welding engineers are well equipped to carry out virtually any welding job on board a ship, in a power station, or in an industrial plant. This includes repair work as well as fabrication and installation jobs.

Our welders are qualified and certified to weld a wide range of materials in any setting. Some of the jobs that they carry out are small and straight-forward; others are very complex and comprehensive.

2-S engine girder crack repair and design modification
2-S engine girder crack repair and design modification

In the latter case, QuantiServ can offer end-to-end solutions, that include:

  • Dismantling work
  • Initial assessment
  • Investigation of the reason for the damage (strain measurements, Finite Element Analysis (FEA)
  • Working out a repair procedure and/or design improvements
  • Planning and executing the work anywhere in the world
  • Post weld treatment (stress-relieve heat treatment and or/in-situ machining)
Another guide rail crack under repair
Another guide rail crack under repair
Another rudder bore repair job
Another rudder bore repair job

Case Studies

Here are two examples of structural repair on low-speed engines. The first case is straight forward, the second one is more complex.

Repair of a crack in the A-frame of a slow-speed engine, after preparatory grinding (left) and after welding (right)
Repair of a crack in the A-frame of a slow-speed engine, after preparatory grinding (left) and after welding (right)

The following photos show an example of a rudder repair job, carried out recently in Singapore:

Heavily worn out rudder bores during welding repair
Heavily worn out rudder bores during welding repair
An access openings had to be cut into the rudder. The work can’t get any more “in-situ” than this!
An access openings had to be cut into the rudder. The work can’t get any more “in-situ” than this!
Building up of the rudder bores by welding
Building up of the rudder bores by welding
NDT crack testing on the completed rudder bores
NDT crack testing on the completed rudder bores

The following photos show the repair by localized welding of a large gearwheel:

Pitting and cracks in a large gearwheel
Pitting and cracks in a large gearwheel
After grinding out the cracks
After grinding out the cracks
During welding
During welding
Gearwheel after completion (Dye check after completion of the repair)
Gearwheel after completion (Dye check after completion of the repair)