NEN EN 12516-2 : 2014

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

Describes the method for the strength calculation of the shell with respect to internal pressure of the valve.