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NEN EN 12516-2 : 2014
Current
The latest, up-to-date edition.
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INDUSTRIAL VALVES - SHELL DESIGN STRENGTH - PART 2: CALCULATION METHOD FOR STEEL VALVE SHELLS
12-01-2013
Foreword
Introduction
1 Scope
2 Normative references
3 Symbols and units
4 General conditions for strength calculation
5 Design pressure
6 Nominal design stresses for pressure parts other than bolts
6.1 General
6.2 Steels and cast steels other than defined in 6.3, 6.4 or 6.5
6.3 Austenitic steel and austenitic cast steel with a minimum
rupture elongation not less than 30 %
6.4 Austenitic steel and austenitic cast steel with a minimum
rupture elongation not less than 35 %
6.5 Non-alloy and low-alloy cast steel
6.6 Creep conditions
7 Calculation methods for the wall thickness of valve bodies
7.1 General
7.2 Valve bodies
8 Calculation methods for bolted bonnets and covers
8.1 General
8.2 Covers made of flat plates
8.3 Covers consisting of a spherically domed end and an
adjoining flanged ring
8.4 Dished heads
9 Calculation method for pressure sealed bonnets and covers
10 Calculation methods for flanges
10.1 General
10.2 Circular flanges
10.3 Oval flanges
10.4 Rectangular or square flanges
10.5 Calculation of the bolt diameter
10.6 Design temperature
11 Calculation methods for glands
11.1 Loads
11.2 Gland bolts
11.3 Gland flanges
11.4 Other components
12 Fatigue
13 Marking
Annex A (informative) Allowable stresses
Annex B (informative) Characteristic values of gaskets and joints
Annex C (informative) Calculation procedure
Annex ZA (informative) Relationship between this European Standard
and the Essential Requirements of EU Directive 97/23/EC
Bibliography
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