BS ISO 18421:2016 pdf download.Ships and marine technology — Inland navigation vessels — Lifebuoy housings
1 Scope
This International Standard specifies the construction and dimensions of housing for lifebuoys.
The housing serves to encase a lifebuoy to protect it against deterioration from the elements and against vandalism.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual tolerance indications
ISO 18422, Ships and marine technology — Inland navigation vessels — Plate with instructions for rescue,resuscitation and first aid for drowning persons
IEC 60945, Maritime navigation and radiocommunication equipment and systems — General requirements — Methods of testing and required test results
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 lifebuoy
buoyant ring provided with grab lines (3.2) and reflective strips
Note 1 to entry: A lifebuoy enables a person to keep himself above water, marks the location of the emergency,and aids recovery. Lifebuoys can be fitted with lines and light sources in accordance with official regulations.
3.2 grab line
fibre rope for seizing and grabbing the lifebuoy (3.1) in water
4 Requirements
4.1 Dimensions
General tolerances: ISO 2768-c
Edges shall be rounded with: min. R = 0,3 mm.
NOTE Radius is given to prevent clothing getting caught.
The internal dimensions are to be chosen so that a lifebuoy of 760 mm outer diameter, 440 mm inner diameter and of 103 mm thickness with a grab line at its outer edge and a floatable line with a diameter of 8 mm to 11 mm and 30 m length, with or without throw line, fits into the housing.
4.2 Design
4.2.1 Interior
The interior of the housing shall be designed so that neither the lifebuoy nor the life-line will fall off when the cover is opened and at the same time allows quick and easy access to both.
4.2.2 Cover
The housing shall have a cover with bolting. The cover shall have a captive connection to the housing.The closing latches shall keep the door shut, but allow quick and easy access the lifebuoy.
The design of the cover shall allow an easy access of the life buoy.
The cover of the housing shall have a lifebuoy symbol to the outside and the plate with directions for rescue and resuscitation of drowning persons in accordance with ISO 18422 shall be fastened inside the inner circle of the lifebuoy symbol.
4.2.3 Mounting
The housing for lifebuoys shall be manufactured in such a way that it can be fixed to masts, posts and poles or onto walls or railings.
These requirements are met if there are four bolt holes for the fixing of the housing through which threaded bolts can be inserted.
4.3 Material
The housing shall be of a suitable material, e.g.:
— plastics (Pl);
— seawater-resistant aluminium (Al);
— hot-dip galvanised steel (HDG);
— stainless steel (Stst).
BS ISO 18421:2016 pdf download
