I.S. EN 12729:2002
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
DEVICES TO PREVENT POLLUTION BY BACKFLOW OF POTABLE WATER - CONTROLLABLE BACKFLOW PREVENTER WITH REDUCED PRESSURE ZONE - FAMILY B - TYPE A
Hardcopy , PDF
02-03-2023
English
01-01-2002
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Denomination
5 Designation
6 Symbolization
7 Physico-chemical characteristics
7.1 Materials
7.2 Nature of the materials
8 Design
8.1 General
8.2 Relief valve
9 Characteristics and tests
9.1 General
9.2 General tolerances
9.3 Expression of the results
9.4 Dimensional characteristics
9.5 Mechanical characteristics
9.6 Tightness characteristics
9.7 Hydraulic characteristics
10 Order of testing
11 Marking and technical documents
11.1 Marking
11.2 Technical documents
12 Presentation at delivery
Annex A (informative) Examples of presentation of test results
Bibliography
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