T/SSITS 507-2024 Technical requirements for explosion-proof forklift-type mobile robots

Scope

Scope: This document specifies the technical requirements for explosion-proof forklift-type mobile robots (hereinafter referred to as robots) in explosive environments, describes the corresponding test methods, and stipulates inspection rules as well as marking, accompanying documents, transportation, and storage. This document applies to robots in explosive zones 1, 2, and 21. This document does not apply to robots in coal mine underground areas, equipment Class II Zone 0, or equipment Class III Zone 20. This document does not apply to robots used in dust environments formed by self-igniting substances (such as ammunition) that do not require oxygen in the atmosphere for combustion. It is assumed that Ex equipment can operate under the following standard atmospheric conditions (related to the explosive characteristics of the environment): — Temperature: -20°C to +60°C; — Pressure: 80kPa to 110kPa; — Normal oxygen content in the air: typically 21% (by volume). Note 1: Although the standard atmospheric temperature range given above is -20°C to +60°C, the normal temperature range used by Ex equipment is still -20°C to +40°C, except where otherwise specified and marked. Generally, -20°C to +40°C is suitable for most Ex equipment, and if all equipment is manufactured to withstand an ambient temperature of 60°C, unnecessary design restrictions will be added. Main technical content: I. Terms and Definitions The terms and definitions applicable to this document include: 1. Explosion-proof forklift-type mobile robots: forklifts that can automatically operate in hazardous areas, with various types such as counterbalanced forklifts. 2. Forklift attachments: independent working devices used to expand the functions of forklifts and mounted on key parts of forklifts. 3. Minimum ignition temperature of explosive environments: the minimum ignition temperature of flammable substance vapors or dust clouds under specified conditions. 4. Maximum surface t

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