ISO 18421 pdf download Ships and marine technology — Inland navigation vessels — Lifebuoy housings
This International Standard stipulates the construction and dimensions of housing for lifebuoys.The housing serves to encase a lifebuoy to protect it against deterioration from the elements andagainst vandalism.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and areindispensable for its application. For dated references, only the edition cited applies. For undatedreferences, 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 individualtolerance indications
SO 12402-7, Personal flotation devices – Part 7: Materials and components — Safety requirementsand test methods
SO 18422, Ships and marine technology – Inland navigation vessels – Plate with instructions for rescue,resuscitation and first aid for drowning persons
EC 60068-2-75, Environmental testing — Part 2: Tests — Test Eh: Hammer tests
IEC60945,Maritime navigation andradiocommunication equipmentandsystems-Generalrequirements-Methods oftesting and required test results
3Terms and definitions
For the purposes of this document, the following terms and definitions apply
lifebuoybuoyant ring provided with grab lines and reflective stripsNote 1 to entry: A lifebuoy enables a person to keep himself above water, marks the location of the emergency, andaids recovery. Lifebuoys can be fitted with lines and light sources in accordance with official regulations.
grab linefibre rope for seizing and grabbing the lifebuoy in water
General tolerances: ISO 2768:-1- C
Edges shall be rounded with: min. R = 03 mm.
NOTERadius is given to prevent clothing getting caught.
The internal dimensions are to be chosen so that a lifebuoy of 750 mm diameter and of 100 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, fit into the housing.
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.
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 opening angle of the cover shall be at least 180°. Notwithstanding the aforementioned, if the cover opens to the top it shall be fitted with a stop device of at least 90°.
The cover of the housing shall have an embossed 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 embossed lifebuoy symbol.
The housing for lifebuoys shall be manufactured in such a way that it can be fixed to masts, posts and poles of different diameters or on to walls or railings.
These requirements are met if there are four reinforced bolt holes of 9 mm diameter for the fixing of the housing through which threaded bolts of sufficient length can be inserted.
— plastics — Pl,
— seawater-resistant aluminium — Al,
— hot-galvanised steel — Hgal or
— stainless steel — Stst.