EN 976-1:1997

1 Scope
2 Normative references
3 Materials
    3.1 General
    3.2 Resins
    3.3 Reinforcement materials
    3.4 Processing agents
    3.5 Fillers
    3.6 Additives
    3.7 Structural core
    3.8 Rib core
4 Tank construction
    4.1 General
    4.2 Cylinder wall and tank end build-up
    4.3 Jointing of cylinder walls and/or tank ends
    4.4 Tank ends
    4.5 Manways
    4.6 Connected pipes and their fittings
    4.7 Lifting devices
    4.8 Anchoring devices
    4.9 Static charge dissipation
5 Requirements
    5.1 Appearance
    5.2 Dimensions
    5.3 Leaktightness
    5.4 Bending and torsion moments on fittings
    5.5 Internal impact resistance
    5.6 External impact resistance
    5.7 Lifting system loading
    5.8 Structural stability
    5.9 Laminate requirements
    5.10 Structural core properties
6 Test methods
    6.1 General
    6.2 Dimensions
    6.3 Leaktightness
    6.4 Bending and torsion moments on fittings
    6.5 Internal impact resistance
    6.6 External impact resistance
    6.7 Lifting system loading
    6.8 Negative pressure test
    6.9 Tests on laminate
    6.10 Structural core properties
7 Marking
Annexes
A (informative) A-deviations

This Part 1 of European Standard EN 976 specifies the requirements and associated test methods for horizontal, cylindrical single walls tanks made of glass reinforced thermosetting resins (hereafter called tanks), and for their accessories, used for the underground non-pressure storage of liquid petroleum based fuels. The tanks specified by this European Standard are tanks with one or more compartments and with or without the possibility of leak detection.