GB 19081-2025
Safety regulations for dust explosion prevention in feed processing systems (English Version)

Standard No.

GB 19081-2025

Language

Chinese, Available in English version

Release Date

2025

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China  CN  /  GB

Latest

GB 19081-2025

Replace By

GB 19081-2008

Introduction

Interpretation of dust explosion safety regulations for feed processing systems

With the development of the feed industry, the potential danger of dust explosions has become increasingly prominent. GB 19081-2025 "Safety Specifications for Dust Explosion Prevention in Feed Processing Systems" has comprehensively updated the dust explosion prevention requirements for feed processing systems in combination with the latest technological developments, with a focus on increasing the division of hazardous areas, process design and equipment selection requirements.

Comparison of standard frameworks

Specification dimensions	Requirements of the 2008 version	New/modified contents of the 2025 version
Hazardous area classification	Unclear zoning levels and scope definition methods	Added classification standards for zones 20, 21 and 22, and provided specific division examples
Process design requirements	Basic process requirements	Added equipment selection, dust control measures and anti-static requirements
Electrical system specifications	Electrical safety requirements	Refine the explosion-proof design standards for dust removal and pneumatic conveying systems

In-depth analysis of core clauses

Example of hazardous area division

According to GB/T 3836.35-2021, the dust explosion hazard areas of feed processing systems are divided into:

• Zone 20: Places where dust exists continuously or for a long time in the form of cloud
• Zone 21: Normal operating areas where dust clouds may appear
• Zone 22: Areas where dust clouds are unlikely to appear or appear only briefly

Implementation suggestions and technical paths

In order to effectively reduce the risk of dust explosion in feed processing systems, the following measures are recommended:

1. Equipment selection:Give priority to equipment with explosion-proof functions, such as explosion relief valves and inerting devices
2. Dust removal system design:Ensure that the wind speed of the dust removal pipe network meets the requirements, and clean the filter bags regularly
3. Electrical safety:Use dust explosion-proof electrical equipment and ensure that the grounding resistance meets the standards

Charts and diagrams illustrate key points of the specification

GB 19081-2025 Referenced Document

• GB 12158 General Requirements to Prevent Electrostatic Accidents
• GB 15577 Safety regulations for dust explosion prevention and protection
• GB 50016 Architectural design code for fire protection
• GB 50057 Code for design protection of structures against lightning
• GB 50058 Code for design of electrical installations in explosive atmospheres
• GB 55037 General code for building fire protection
• GB/T 15604 Dust explosion protection terminology
• GB/T 15605 Guide for pressure venting of dust explosions
• GB/T 26888 Grain and oil machinery.Magnetic separator

GB 19081-2025 history

• 2025 GB 19081-2025 Safety regulations for dust explosion prevention in feed processing systems
• 2008 GB 19081-2008 Safety regulations for dust explosion prevention in feed processing system
• 2003 GB 19081-2003 Safety regulations dust explosion for prevention and pretection in the feed processing system

Topics on standards and specifications

Standard and Specification