In one of Hydrauvision’s operating sectors, the dredging sector, piping requires special attention to be paid to the environment it is applied in.
The tubing should withstand outside air, salt water, extreme temperatures, and other severe circumstances.
The quality of the couplings is equally important, as couplings are considered the weak links in a system and should therefore be extra strong and reliable.
A dredging company approached Hydrauvision Piping for a ship moored in Singapore. There were multiple leakages in the piping, which resulted in a hazardous situation.
With a length of 144m, a width of 28m, and a hopper capacity of 17,000 cubic metres, the ship was among the larger dredgers.
Experienced personnel of Hydrauvision piping travelled to Singapore to map out the ship’s situation regarding the leakages. Based on this, we presented a quotation for the replacement and modification of the piping concerned. After the customer had granted Hydrauvision the order, the piping division started prefabricating the piping work.
Altogether, three people at the Yerseke subsidiary have been working on this project fulltime for two weeks. After manufacturing, the piping was flushed and pressed. Flushing was done with oil of purity class up to NAS 5 and was carried out using a flushing unit by the division Hydrauvision Rental.
In addition, a non-destructive test (NDT) was performed, whereby the welding connections between pipe and flange were investigated by means of X-rays. After these X-rays, a penetrant test took place, whereby the outer layer was checked for cracks. When it had been confirmed that everything was in order, the pipes were taken to the paint shop, where they were coated with three layers of spray-paint. This coating is seawater-proof. In fact, its quality is thus high that it is suitable for offshore applications.
Subsequently, everything was packaged and taken to the customer’s warehouse. The customer’s warehouse is filled with additional equipment and materials from various companies so that the whole ship can be repaired within an as short as possible time span from the moment of docking.
When docking starts flushing needs to take place. This is also done by means of one of Hydrauvision Rental’s flushing units. During docking, four people will be working on this job for four weeks. And all the time, service engineers from the Hydrauvision service division are standing by to be called in when necessary. A fine example of the intensive collaboration among the different Hydrauvision divisions.
For more information, please contact HydrauRent.