NS EN 12259-2 : 99 AMD 2 2006

Foreword
1 Scope
2 Normative references
3 Definitions
4 Wet alarm valve assembly construction and performance
5 Retard chamber construction and performance
6 Marking
7 Instructions for fitting and operation
8 Evaluation of conformity
Annex A (normative) Fire exposure test for body and cover
Annex B (normative) Strength test for body and cover
Annex C (normative) Performance tests
Annex D (normative) Fatigue test for springs and diaphragms
Annex E (normative) Endurance tests
Annex F (normative) Resistance to ageing test for non-metallic
        components (excluding gaskets and seals)
Annex G (normative) Resistance to adhesion test for sealing
        assembly elements
Annex H (normative) Determination of pressure loss due to
        hydraulic friction loss
Annex I (normative) Leakage resistance test
Annex J (normative) Strength test for retard chambers
Annex K (informative) Typical testing schedule and example
        of test specimen numbers for wet alarm valve
        assemblies and retard chambers (only for conventional
        design)
Annex L (informative) Recommendations for type approval
        testing
Annex M (informative) Attestation of conformity
Annex ZA (informative) Clauses of this European Standard
         addressing the provisions of the EU Construction
         Products Directive
Bibliography

Defines requirements for constructions and performance of wet alarm valve assemblies and retard chambers used in automatic sprinkler systems. Auxiliary components and attachments to wet alarm valve assemblies and retard chambers are not covered.