NS EN 521 : 2ED 2006

Foreword
1 Scope
2 Normative references
3 Definitions
4 Classification
5 Safety requirements
    5.1 General
    5.2 Conversion to different gases
    5.3 Materials
    5.4 Assembly, cleaning and maintenance
    5.5 Strength and stability
    5.6 Soundness of the gas circuit assembly
    5.7 Connections
    5.8 Transport, fixing and mobility devices
    5.9 Taps
    5.10 Control handles
    5.11 Injectors
    5.12 Ignition devices
    5.13 Flame supervision devices
    5.14 Burners and radiant elements
    5.15 Grids
    5.16 Turnspit
    5.17 Fireguards for heating appliances
    5.18 Locations and compartments for refillable gas
          containers
    5.19 Verification of the heat inputs
    5.20 Resistance to overheating
    5.21 Temperature of various parts of the appliance
    5.22 Temperature of panels (floors, walls or ceilings)
    5.23 Ignition, crosslighting and flame stability
    5.24 Resistance to draught
    5.25 Resistance to liquid spillage
    5.26 Combustion
    5.27 Accumulation of unburnt gas
    5.28 Safety at high temperature
    5.29 Sooting - Condensation
    5.30 Rational use of energy
6 Test methods
    6.1 General
    6.2 Conversion to different gases
    6.3 Materials
    6.4 Assembly, cleaning and maintenance
    6.5 Strength and stability

Defines construction and performance characteristics relative to safety and the rational use of energy of portable appliances burning liquefied petroleum gases at the vapour pressure within the gas container. In addition, it specifies test procedures and requirements for marking and information to be given in the instructions.