Respiratory protective devices for use against chemical, biological, radiological and nuclear (CBRN) agents - Closed-circuit breathing apparatus. Specification1 Scope This British Standard specifies requirements for closed circuit breathing apparatus (CCBA) intended to be used during firefighting, rescue, evacuation, escape, hazard containment and decontamination, and similar activities by emergency first responders (e. g. fire, ambulance, police, and associated civilian agencies and workers) in areas containing and contaminated by chemical, biological, radiological and nuclear (CBRN) agents. NOTE CCBA

The options are for temperate climates with six CFPP (cold filter plugging point) grades and for arctic or severe winter climates with five different classes

and the width of the rectangular and square membrane window and the diameter of the circular membrane range from 0

Demonstrating conformity

BS EN 3630 ensure the strength and tensile grip of the equipment that uses O rings

BS EN 12560-5 also provides gasket types

Many industries are using digitalization and automation more and more

Trusses with punched metal plate fasteners

it is necessary to use the methods of preparation and conditioning

Electrical cable manufacturers/suppliers

or a carrier matrix to deliver drugs or biologics

This standard is a technical revision of the 2007 version which has been withdrawn

The set point value may be either a mechanical (position