Overview
ISO 21873-2:2019 - Building construction machinery and equipment - Mobile crushers - Part 2: Safety requirements and verification - specifies safety requirements for mobile crushers (as defined in ISO 21873‑1) used to crush rock or reprocess construction materials and capable of relocation between worksites. It applies to self‑propelled, lorry (truck) mounted and semi‑trailer mounted mobile crushers, and excludes fixed (stationary) crushers and large mining‑type movable crushers. The standard addresses significant hazards, foreseeable misuse and verification of protective measures for machines manufactured on or after its publication date (2019).
Key topics and technical requirements
ISO 21873-2 sets out practical design, testing and documentation elements focused on safe operation and verification. Major technical topics include:
- Access and operator’s station - safe ingress/egress, operator visibility, protection from moving parts and exhaust, and ergonomics.
- Controls and indicators - emergency stop, start systems, prevention of inadvertent activation, remote control safety, and clear symbols.
- Drive, steering and brake systems - requirements for steering, service and parking brakes to prevent uncontrolled motion.
- Feed hopper and crushing device safety - guarding, safe feed openings and device‑specific guidance for jaw, HSI/VSI, cone and roll crushers.
- By‑pass and conveyor guards - prevention of accidental movement, falling material, entanglement and safe conveyor guarding recommendations.
- Magnetic separators and auxiliary equipment - magnet hazard control and safe discharge procedures.
- Noise, EMC and electrical systems - sound power/pressure considerations, electromagnetic compatibility, degrees of protection, battery/disconnect provisions and over‑current protection.
- Pressurized systems and tanks - hydraulic lines/hoses, fuel/hydraulic tanks, filler openings and pressure vessel safety.
- Fire protection and maintenance - fire resistance, extinguisher provision, safe maintenance access, support devices and blocked‑crusher clearing guidelines.
- Verification and information for use - testing/verification requirements, safety labels, operator manuals and marking.
Applications and practical value
This standard is used to design, manufacture, test and commission mobile crushers for construction, demolition, recycling and site remediation projects. Applying ISO 21873-2 helps:
- Reduce operator and bystander risk through documented safety measures
- Provide manufacturers with verification steps to demonstrate compliance
- Inform maintenance teams on safe servicing and blocked‑crusher procedures
- Support purchasers and site managers in specifying safe mobile crushing equipment
Who should use this standard
- Equipment manufacturers (design and safety engineering)
- Machine safety and compliance officers
- Test laboratories and certification bodies
- Site owners, fleet managers and contractors procuring mobile crushers
- Maintenance and training personnel responsible for safe operation
Related standard
- ISO 21873‑1 - defines mobile crusher types and terminology referenced by Part 2.
Keywords: ISO 21873-2, mobile crushers safety, mobile crusher verification, construction machinery safety, crusher guarding, operator manual, noise emission, EMC, crushing device safety.
Open preview (PDF)Building construction machinery and equipment — Mobile crushers — Part 2: Safety requirements and verification
