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WATER-TUBE BOILERS AND AUXILIARY INSTALLATIONS - PART 7: REQUIREMENTS FOR EQUIPMENT FOR THE BOILER
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Published date: 12-01-2013
Publisher: Netherlands Standards
1 Scope2 Normative references3 Terms and definitions 3.1 Types of steam boilers and hot water generators 3.2 Limits of steam boilers and hot water generators 3.3 Steam boilers and hot water generating plant 3.4 Heat supply system 3.5 Classification of pressure generation systems (Hot water generators) 3.6 Expansion system (vessel and tank) 3.7 Sinking time 3.8 Maximum continuous rating (MCR) 3.9 Allowable heat output 3.10 Maximum allowable pressure 3.11 Allowable flow temperature 3.12 Controls 3.13 Limiters 3.14 Fail-safe 3.15 Self-monitoring 3.16 Redundancy 3.17 Independent 3.18 Reliability 3.19 Lock-out 3.20 Unit test 3.21 Functional test 3.22 Permanent supervision4 General requirements for steam boilers and hot water generators 4.1 Safeguards against excessive pressure 4.2 Heat supply system 4.3 Ash removal plants 4.4 Flue-gas cleaning plants 4.5 Requirements for limiting devices and safety circuits 4.6 Cleaning, access and inspection openings 4.7 Feed lines and protection against feedwater backflow 4.8 Connection of steam boilers or hot water generators5 Special requirements for steam boilers 5.1 Requirements for pumps 5.2 Isolating and drain devices 5.3 Lowest permissible water level (LWL) 5.4 Water level and flow indicators 5.5 Water supply control and protective device against water shortage 5.6 Pressure and temperature measuring devices5.7 Marking6 Special requirements for hot water generators 6.1 Requirements for hot water generating systems 6.2 Requirements for pumps 6.3 Shut-off and drain devices 6.4 Lowest permissible water level and installation of flow and return line 6.5 Water level and flow indicators 6.6 Water supply and drain control, protective device against water shortage 6.7 Safeguards against minimum pressure 6.8 Safety device for temperature control 6.9 Pressure and temperature indicating devices 6.10 Marking7 Additional requirements for plants without permanent supervision 7.1 General 7.2 Steam boilers 7.3 Hot water generators8 Final assessment of safety devices 8.1 Performance of inspection 8.2 Equipment on the steam and water side 8.3 Firing system equipment 8.4 Electrical safety circuit 8.5 Operating instructions9 Small plant boilers 9.1 Steam boilers 9.2 Hot water generatorsAnnex A (normative) Chemical recovery boilers (Black liquor recovery boilers)Annex B (informative) Design examples for hot water generating systemsAnnex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of the Pressure Equipment Directive
Defines the essential requirements for equipment and protective devices for a water-tube boiler plant as defined in EN 12952-1, to ensure the boiler operates safely within the allowable limits (pressure, temperature, etc.).
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