off gas ( BOG ) compressors to an LNG transport vessel . The design was based on numerous criteria that had been established during the project planning phase . The coolant water specifications were part of this information package provided by the customer because they could affect the materials used in the construction of the compressor .
Furthermore , the overall compressor cooling system is separate from the compressors and beyond the scope of Burckhardt Compression . Following on from installation , any treatment of the cooling water , such as the addition of biocide , anti-freeze or anti-corrosion additives and maintaining proper mixture is a responsibility that is retained by either the shipyard or the vessel ’ s owner .
PREDICTIVE MAINTENANCE
As with all equipment , manufacturers provide an owner ’ s manual that offers all the information required to operate and maintain the machinery . In today ’ s world where modern servicing routines are more proactive , manufacturers such as Burckhardt Compression encourage predictive maintenance practices to optimize performance and minimize downtime . A flexible approach includes both regular maintenance schedules and predictive practices to ensure the continued reliable and efficient operation of the equipment .
After less than one year in service , the vessel reported coolant in the compressor oil system and requested
Burckhardt attend to investigate and provide technical support . When Burckhardt ’ s engineers came on board to carry out this inspection , they found that the coolant galleries around the cylinders were more corroded than they expected . Further investigation showed that the correct , specified mixture of glycol had not been installed by the responsible maintenance team during the commissioning process and preas a result , some corrosion was found in the cooling jacket of the cylinders as well as in the pipework to the compressor .
While this was not an immediate problem , left unchecked , the corrosion could cause serious damage . A plan was formulated where the compressors could continue to operate , having installed new coolant with the correct mixture of glycol , and the damaged parts would be replaced during the first dry-dock maintenance period .
ONGOING SUPPORT
Thankfully , the Burckhardt Compression service team discovered the issue and established the extent of the damage before it had an impact on the performance of the vessel . However , there is little consolation that this whole situation could have been avoided had the correct maintenance procedures been followed .
To resolve the situation , the cylinders and the pipework needed to be replaced . Aside from the time required to complete this work , the overall project cost was considerable . Burckhardt Compression has supported the operator with a comprehensive inspection report and planning for the new components that will be installed to ensure continued , reliable operation of the compressors .
For further information , please visit www . burckhardtcompression . com
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