GB/T 42687-2023 Ships and marine technology - Marine cranes - Noise limits and measuring method
1 Scope
This document specifies noise limits, noise measurement methods and hearing protection for marine cranes, including electro-hydraulic cylinder luffing cranes, electro-hydraulic wire rope luffing cranes and electric wire rope luffing cranes.
This document is applicable to the noise assessment of marine cranes and for the protection of their operators.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3746 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Survey method using an enveloping measurement surface over a reflecting plane
ISO 3828 Shipbuilding and marine structures - Deck machinery - Vocabulary and symbols
GB/T 42687-2023 Ships and marine technology - Marine cranes - Noise limits and measuring method
1 Scope
This document specifies noise limits, noise measurement methods and hearing protection for marine cranes, including electro-hydraulic cylinder luffing cranes, electro-hydraulic wire rope luffing cranes and electric wire rope luffing cranes.
This document is applicable to the noise assessment of marine cranes and for the protection of their operators.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3746 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Survey method using an enveloping measurement surface over a reflecting plane
ISO 3828 Shipbuilding and marine structures - Deck machinery - Vocabulary and symbols
ISO 4306-1 Cranes - Vocabulary - Part 1: General
IEC 61672-1 Electroacoustics - Sound level meters - Part 1: Specifications
3 Terms and definitions
For the purposes of this document, the terms and definition given in ISO 4306-1 and ISO 3828 and following apply.
3.1
operating console
location at which the crane’s operator activates the motions of the crane
3.2
engine room
location inside the crane’s structure that contains the drives, power units (3.5) and drive mechanisms (3.6)
3.3
structure exterior
exterior of the crane tower body and boom structure
3.4
base exterior
exterior of the crane base flange, acting as the interface between the crane and the hull structure
3.5
power unit
electric motors and pump stations
3.6
drive mechanism
reduction gears, drums, motors and hydraulic cylinders
3.7
noise level
A-weighted sound pressure level
quantity measured by a sound level meter in which the frequency response is weighted according to the A-weighting curve
Note: See IEC 61672-1.
[SOURCE: 1.4.4 in IMO MSC. 337(91).]
4 Area classification
Marine cranes are often subdivided into to the following areas: operating console, engine room, structure exterior and base exterior.
