GB17750-2025

Safety specification for dipping coating

浸漆涂装安全规范

GB 17750-2025 est une norme nationale chinoise obligatoire à venir : Safety specification for dipping coating. Secteur : Alimentation. Thème principal : Sécurité des produits. Entrée en vigueur : 1 oct. 2026.

L’applicabilité dépend du périmètre du produit, de la voie de certification, des avis des autorités et des règles de transition. Demandez une traduction ou vérifiez la source avant d’utiliser cette fiche pour une décision de conformité.

Aperçu de conformité

Cet aperçu n’est actuellement disponible qu’en anglais.

Champ d’application

This standard applies to the design, manufacture, installation, acceptance, and use of dipping coating processes and equipment utilizing flammable or combustible liquid coatings. It specifically covers various operations including standard dipping, vacuum dipping, and the newly defined electromagnetic wire dipping. This standard is mandatory for all manufacturers utilizing dipping coating processes in China and does not apply to electrophoretic painting processes.

Exigences techniques

The standard outlines comprehensive safety specifications for dipping coating operations. It defines the dipping area and mandates that the concentration of flammable gases must not exceed 25% of their lower explosive limit (LEL). Equipment must be constructed from non-combustible materials with specific fire resistance limits, and dip tanks must feature overflow mechanisms and emergency drainage systems capable of emptying within a strict timeframe. For specialized equipment, vacuum dipping equipment must be designed, manufactured, and inspected as pressure vessels, complete with safety explosion-proof devices. The newly added electromagnetic wire dipping equipment must operate in a sealed, negative pressure state with continuous ventilation and automated safety shutdowns. Furthermore, storage tanks for coatings must have a volume at least 1.1 times that of the dip tank and be stored in rooms with a minimum of 12 air changes per hour. In terms of electrical safety, the standard details the classification of explosive gas environments into specific zones based on ventilation and vapor control. All electrical equipment must be selected according to the hazardous area classification, and strict grounding requirements are enforced to prevent electrostatic accidents. The standard also mandates interlocking controls where ventilation failures, fire alarms, or equipment malfunctions automatically trigger shutdowns and alerts.

Méthodes d’essai

Compliance verification involves on-site inspections and document reviews. Key evaluation areas include verifying the explosion-proof selection of electrical equipment, checking grounding resistance records, and inspecting interlocking control systems. Facilities must provide design documents, hazardous area classification diagrams, and regular safety inspection reports to prove adherence to the standard's operational and maintenance protocols.

Questions fréquentes

What products and processes are regulated under GB 17750-2025?

It applies to the design, manufacture, installation, acceptance, and use of dipping coating processes and equipment that use flammable or combustible liquid coatings. It specifically includes processes like vacuum dipping and electromagnetic wire dipping, but excludes electrophoretic painting.

Are there any significant updates from the previous GB 17750-2012 version?

The 2025 version removes the optional reference scope, introduces definitions for electromagnetic wire dipping, updates requirements for dip tanks and ventilation, adds interlocking control requirements for fire and alarm systems, and includes new regulations for exhaust gas treatment and personal protective equipment.

How does GB 17750-2025 relate to international standards?

The standard references NFPA 34-2018 (Standard for Dipping and Coating Processes Using Flammable or Combustible Liquids) in its bibliography, indicating an alignment with international safety principles for flammable liquid dipping operations.

The summary above provides a high-level overview of GB 17750-2025. To ensure complete compliance for your products and facilities entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 17750-2025 today to access all detailed parameters, hazardous area classification diagrams, and testing procedures.

Indications d’applicabilité

Type: Sécurité
CCS: C 72
ICS: 13.100
Autorité compétente: Ministry of Emergency Management
Comité technique: National Technical Committee on Work Safety of Standardization Administration of China

Relations

Remplace:GB 17750-2012 (En vigueur)