GL ventilation rules published

Ventilation systems on board of ships are covered by new construction rules which have come into force on September 1st. The construction rules contain technical requirements for different ship types and ventilation systems. The comprehensive set of rules compiled in a single document applies to all newbuildings to be classed for unrestricted service.

Twelve chapters deal with subjects such as ventilation and air condition scheme including the accommodation and service spaces, ventilation system engine room and machinery spaces, ventilation system cargo holds, details of fire flaps and weather tight closures, details of duct penetrations, approval information, principle electrical supply, control

and monitoring as well as emergency stops of fans. Additional rules for passenger vessels focus on the requirements of smoke extraction systems.

The construction rules “I-1-21 Ventilation” contain technical requirements based on international regulations which are relevant for classification as well as recommendations i.e. the ventilation requirements for the carriage of livestock.

In order to assist designers, yards and owners to check the effectiveness of planned and/or installed ventilation systems in cargo hold, Germanischer Lloyd offers the application of Computational Fluid Dynamics (CFD) methods. These can be applied to simulate significant flow effects and physical phenomena, such as heat transfer, buoyant air flows and gas distributions.

The edition of ventilation rules will be accommodated by a comprehensive set of requirements for fire protection and dangerous cargo. The new edition of rules for ventilation systems is available on the internet at www.gl-group > Client Support > Rules & Guidelines.