15.1.1 For units having a PRS notation in accordance with Pt 3, Ch 12 Riser Systems, Riser Systems are to be surveyed as per a planned
survey schedule agreed between the Owners and LR. This schedule should cover the
extent, level and method of systematic examination of critical components of the
system.
15.1.2 Extent and frequency of thickness measurements of components and areas
where deterioration may be expected due to corrosion are to be included in the above
schedule.
15.1.3 An agreed schedule for periodic surveys should be capable of determining
condition of riser pipe structure and associated critical components, such as any
cladding, bend stiffeners, end connectors, subsea buoyant supporting vessels, subsea
valves, anti-corrosive coatings, etc.
15.1.4 This schedule should also include examination and testing of the riser
system under working conditions at each Annual Survey.
15.1.5 Emergency shut-down systems with associated communication system,
telemetry or instrumentation, pressure relief systems, systems for leak detection
and protection against pressure surges are to be tested at each Annual Survey as per
agreed procedures.