Specialist service
An enhanced service, which includes a suite of additional tests developed to
provide information on the monitoring and possible maintenance requirements
of stern tubes and critical hydraulic systems.
Stern tube specialist service
This service has been developed to meet demands for a test regime that meets the classification societies' requirement to allow deferral of tail-shaft inspections.
An approved stern tube oil-monitoring programme is one part of classification
society requirements that can enable deferral of the normal 5-year withdrawal
of the tail-shaft to, in some cases, over 10 years. This will lead to considerable
cost savings both in dry-dock fees and the overall maintenance budget. The
stern tube oil analysis report includes the reporting of wear metals, and gives
advice where results have exceeded the guidance limits set by the appropriate
classification society.
N.B. A sample result which exceeds limits, does not automatically mean that
the vessel requires tail-shaft withdrawal. A classification society surveyor has
the discretion to defer a physical survey if the condition monitoring information
contains anomalous results.
As the stern tube lubricating oil assessment is a key factor in the assessment
of tail-shaft condition, it is vitally important that representative sampling is
achieved from the correct part of the system at the right time. Please see the
BP Marine ‘Engineers’ Pocket Guide’.
Hydraulic system specialist service
Certain critical hydraulic systems such as those associated with cargo valves and control systems require additional specific tests to check the cleanliness (Particle Counting) of the oil and for system component wear (Ferrometric Wear Severity Index and Micro filtration). All reports are provided in an easy to read format which contains an overall summary of the condition of the oil and equipment, graphs and where appropriate, images of wear particles to help to identify likely source and type of component wear.
Our Specialist Stern Tube Service fully meets the requirements of the following
major classification societies:
- ABS
- Lloyd’s Register
- Bureau Vertitas
- Germanischer Lloyd
- DNV
- RINA
- ClassNK
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