EN 12953-3:2016

European foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 General
6 Calculation temperature and nominal design
   stress
7 Cylindrical shells
8 Openings and branches in cylindrical shells
9 Ends
10 Supported flat plates, stays and
   stiffeners
11 Design of isolated openings in boiler flat end
   plates
12 Unpierced tubes and tube plates
13 Furnaces tubes, furnace components and
   reversal chambers of cylindrical form subject
   to external pressure
14 Access and inspection openings
Annex A (informative) - Calculation form for
        ?Walker' -type reverse curve sections or
        corrugations
Annex B (normative) - Furnace calculation
        temperature
Annex D (normative) - Economizer and superheater
        with water tube design connected to the shell boiler
Annex E (informative) - Significant technical changes
        between this European Standard and the previous
        edition
Annex ZA (informative) - Relationship between
         this European Standard and the Essential
         Requirements of EU Directive 2014/68/EU
         aimed to be covered
Bibliography

This Part of this European Standard specifies requirements for the design and calculation of pressure parts of shell boilers as defined in EN 12953 1.NOTEFor other components such as economisers, superheaters, tube walls, headers, reference should be made to EN 12952 series.