Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Equipment and protective systems for firedamp drainage
  4.1 General
  4.2 Borehole standpipes
  4.3 Drainage pipes for seals and stoppings
  4.4 Water separators at drainage points
  4.5 Firedamp pipes
       4.5.1 General requirements for firedamp pipes
       4.5.2 Measuring points for measuring equipment in
             firedamp drainage pipes
  4.6 Pressure vessels in firedamp drainage plant
  4.7 Exhausters
       4.7.1 Requirements for exhausters
       4.7.2 Reserve exhausters
       4.7.3 Location of exhausters
  4.8 Venting of the drained firedamp
  4.9 Explosion prevention systems for pipelines
       4.9.1 Explosion barriers
       4.9.2 Non-flammable firedamp vent pipe outlets and
             flame arrester outlets
       4.9.3 Reserve container and operating state
  4.10 Requirements for the design of electrical safety
       devices
  4.11 Electrostatic ignition risks
5 Instructions for installation and use
Annex A (informative) Installation and use of firedamp drainage
                      system
      A.1 General
      A.2 Work on firedamp pipes
      A.3 Measures to be taken when gas levels fall below
          or exceed limit values during firedamp drainage
      A.4 Failure or shutdown of exhausters
Annex B (informative) Monitoring of firedamp drainage system
      B.1 Examination and inspection by competent persons
      B.2 Measurement of the drained firedamp mixture and
          pressure
          B.2.1 Measurements taken by hand
          B.2.2 Fixed monitoring equipment
      B.3 Documentation
      B.4 Firedamp circuit plan
Annex C (informative) Requirements for location of exhausters
Annex D (informative) Requirements for gas removal equipment
                      for abandoned surface outlets
Annex E (informative) Example for calculation of t[90] path
      E.1 General
      E.2 Example for calculation of t[90]-path
Annex ZA (informative) Relationship between this European
                       Standard and the Essential
                       Requirements of EU Directive 94/9/EC
Bibliography