BS 679:1989 - Specification for filters, cover lenses and backing lenses for use during welding and similar operations
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The British Standard BS 679:1989 specifies the requirements for filters, cover lenses, and backing lenses used during welding and similar operations. This standard ensures that these protective devices meet specific safety and performance criteria to protect workers from the hazards associated with welding, such as intense light, heat, and flying debris.