Standard No.:	GB/T 42687-2023
English Name:	Ships and marine technology—Marine cranes—Noise limits and measuring method
Chinese Name:	船舶与海洋技术 船用起重机 噪声要求与测量方法
Chinese Classification:	U47    Compartment auxiliary machine
Professional Classification:	GB    National Standard
ICS Classification:	47.020.50 47.020.50    Deck equipment and installations 47.020.50
Source Content Issued by:	SAMR; SAC
Issued on:	2023-05-23
Implemented on:	2023-12-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	6500 words
Translation Price(USD):	195.0
Delivery:	via email in 1~3 business day

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.