When crucial components like shaft seal liners suffer damage, owners face the need for urgent replacement or repair solutions.

Time is money, and speed of delivery plays a crucial role in the decision-making process.

In a recent case, MarineShaft successfully repaired two damaged Shaft liners for a tunnel Thruster in only 4 days.

MarineShaft received an inquiry from our French client to repair or replace the liners. Based on the received pictures and measurements of the damage, MarineShaft suggested repair by laser cladding of the two Duplex Seal Liners.

The vessel M/V Wind of Change was docked in Poland and the client shipped the Shaft seal liners to MS workshop in Denmark.

Each liner measured Ø339,85/270 x 185,5 mm.

WORK:

The liners had a surface layer of chromium, which was removed by machining, after which a conducted liquid penetrant test of the surface was completed.

MarineShaft applied Stellite by laser cladding, a process which adds 0,8 mm of material with each layer applied. The new material fuses to the base material, and an even harder and more wear resistant surface is obtained.

In this case, 3 layers were sufficient to rebuild to original dimensions, but additional layers can be applied if needed, as you can read about in the next case.

After laser cladding MS machined the rough laser cladded surface, back to the original dimensions and a second liquid penetrant test confirmed the quality of the laser cladded area, thus completing the final inspection.

The job completed in 4 days.