jnorm59,
extract below taken from Swansea Drydock co.
Welsh Piper
The Welsh Piper is a 25 year old dredger which required a 25 year special survey and repair. The 26 day project included steel replacement; dredge pump impeller renewal; tail shaft works including fitting of new forward and after seals, renewal of SKF coupling, rudder stock machining and fitting of new palm bolts, lower pintail shaft and renewal of new upper and lower bushes; thruster works. The project required major machining and a full blast and painting of the vessel to include the main decks and cargo hopper. Swansea Drydocks added value through the adoption of an innovative solution in the design and reworking of the dredge pump slewing.
Neville - Hawkey01