DIN Standards Committee Optics and Precision Mechanics
DIN 22100-3
Articles and materials from synthetic for use in underground mines - Part 3: Spiral air ducts - Safety requirements, testing, marking
Betriebsmittel und Betriebsstoffe aus Kunststoffen zur Verwendung in Bergwerken unter Tage - Teil 3: Spirallutten - Sicherheitstechnische Anforderungen, Prüfungen, Kennzeichnung
Overview
Synthetics which are used in German underground mines shall meet particular safety requirements. The standard contains requirements and test methods for fire protection, explosion prevention (electrostatics) and hygienic properties of spiral air ducts. Spiral air ducts in accordance with DIN 21605 are flexible plastic ventilation ducts which are equipped on the outside with a continuous spring-steel wire spiral, for holding open the cross-section, and which are used for exhaust and forced ventilation. The standard has been prepared by Working Committee NA 008-07-05 AA "Kunststoffe" ("Synthetics") of FABERG.
