EN 1488:2000

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Materials and surface finishes
5 Design and dimensional requirements
6 Hydraulic tests and requirements
7 Mechanical tests and requirements
8 Acoustic tests and requirements
9 Tests and requirements of the components of the expansion
   group
10 Classification
11 Designation
12 Marking
Annex A (informative)
      A.1 Safety equipment for water heaters
      A.2 Classification of water heaters according to
          heating method

This European Standard specifies, dimensions, materials and performance requirements (including methods of test) for expansion groups, of nominal sizes from DN 15 to DN 40, having working pressures from 0,1 MPa (1 bar) to 1,0 MPa (10 bar). Expansion groups are intended for fitting to the cold water supply of storage water heaters, having a maximum distribution temperature of 95°C, for all energy sources. Expansion groups limit pressure, in the water heater to which they are fitted, that is produced by thermal expansion of the water.