Protective clothing – Electrostatic properties –
Part 5: Material performance and design requirements
Standard for protective clothing against electrostatic charge for use in areas where there is an explosion hazard, e.g. in refineries.
- The clothing must completely cover any textile that does not provide antistatic protection.
- Accessories, such as markers, labels and reflectors, must be permanently attached to the garment, in such a way that they cannot be separated from the garment. Loose parts are not permitted. Accessories that can conduct electricity, such as zips and metal buttons, are only permitted if they are completely covered by the antistatic outer layer.
The textile of the outer layer must be tested and approved according to one of the following standards: EN 1149-1 or EN 1149-3. The distance between the conductive threads in the textile must not exceed 10 mm.
When wearing garments with electrostatic properties it is important to be properly earthed. Resistance between person and earth must be less than 108 Ω, which is achieved e.g. by using appropriate protective footwear such as shoes with electrostatic properties that meet the requirements of EN ISO 20345: 2011 or EN-20344. Protective clothing with electrostatic properties must not be opened or removed in combustible or explosive environments or when handling combustible or explosive substances. Garments should only be used in areas with increased oxygen content following approval from the authorised safety engineer at the workplace. The antistatic properties of the garment may be affected by wear, washing and any contaminants. Materials that are not approved according to the standard must be covered by protective clothing during normal use (incl. bending and movements).
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