GB17381-2020

Regulation for surface colours of the visual aids to navigation

视觉航标表面色规定

GB 17381-2020 é uma norma nacional chinesa obrigatória vigente: Regulation for surface colours of the visual aids to navigation. Setor: Máquinas. Foco: Segurança de produtos. Entrada em vigor: 1 de jun. de 2021.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

This standard applies to the surface colours of all visual aids to navigation deployed in China's coastal waters and inland waterways. It covers the color composition, painting methods, and chromaticity ranges for these facilities. It is mandatory for all manufacturers and operators of maritime and inland navigation markers.

Requisitos técnicos

This standard categorizes visual aid surface colors into three types: ordinary surface colours, fluorescent colours, and retroreflective colours. It specifies the chromaticity range boundaries and luminance factors for six primary colors: red, yellow, green, blue, white, and black. The standard defines strict boundary equations and intersection coordinates on the chromaticity diagram to ensure color recognition. For ordinary and fluorescent colors, the standard dictates minimum luminance factor thresholds to guarantee visibility under standard illuminant D65. Retroreflective colors are restricted to red, yellow, green, and white, adhering to the boundary definitions of ordinary colors. Manufacturers must ensure their materials meet these precise chromatic and photometric limits.

Métodos de ensaio

Color measurement must be conducted using standard illuminant D65 with a 45/0 geometric condition and a 2-degree observer field. The standard also provides an informative appendix featuring RAL and NCS color samples for practical field verification of ordinary and fluorescent colors. These reference samples allow engineers to perform on-site validation against the required chromaticity ranges.

Perguntas frequentes

What products and facilities are regulated under GB 17381-2020?

This standard applies to all visual aids to navigation, including buoys, beacons, and marking structures, deployed in both China's coastal waters and inland waterways. It is mandatory for all such visual aids operating within these jurisdictions.

What are the main updates in GB 17381-2020 compared to the previous GB 17381-1998?

Compared to the 1998 version, this update removes the term light reflectance and introduces luminance factor. It also modifies the boundary equations, intersection coordinates, and luminance factors for both ordinary and fluorescent surface colors, and updates the retroreflective color requirements. Engineers must transition to the 2020 version for current compliance.

How does GB 17381-2020 align with international color systems like RAL or NCS?

The standard defines color boundaries using specific mathematical equations and chromaticity coordinates under standard illuminant D65. For practical field verification, it provides equivalent reference colors in the RAL and NCS color systems. Manufacturers can use these specified RAL or NCS codes for on-site verification.

The summary above provides a high-level overview of GB 17381-2020. To ensure complete compliance for your maritime or inland navigation products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 17381-2020 today to access all detailed boundary equations, chromaticity coordinate tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Segurança
CCS: R 63
ICS: 03.220.40
Órgão competente: Ministry of Transport
Comitê técnico: Ministry of Transport

Relações

Substitui:GB 17381-1998