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BS EN 12516-2:2014+A1:2021

BS EN 12516-2:2014+A1:2021

$215.11

Industrial valves. Shell design strength – Calculation method for steel valve shells

Published By Publication Date Number of Pages
BSI 2021 110
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This European Standard specifies the method for the strength calculation of the shell with respect to internal pressure of the valve.

PDF Catalog

PDF Pages PDF Title
2 undefined
11 1 Scope
2 Normative references
3 Symbols and units
17 4 General conditions for strength calculation
18 5 Design pressure
6 Nominal design stresses for pressure parts other than bolts
6.1 General
19 6.2 Steels and cast steels other than defined in 6.3, 6.4 or 6.5
20 6.3 !Austenitic steel and austenitic cast steel with a minimum rupture elongation > 30 %”
6.4 !Austenitic steel and austenitic cast steel with a minimum rupture elongation > 35 %”
6.5 Ferritic and martensitic cast steel
6.6 Creep conditions
7 Calculation methods for the wall thickness of valve bodies
7.1 General
21 7.2 Wall thickness of bodies and branches outside crotch area
7.2.1 General
7.2.2 Cylindrical bodies or branches
22 7.2.3 Spherical bodies or branches
7.2.4 Conical bodies or branches
24 7.2.5 Bodies or branches with oval or rectangular cross-sections
7.2.5.1 General
25 7.2.5.2 Oval-shaped cross sections
29 7.2.5.3 Rectangular cross sections
31 7.3 Wall thickness in the crotch area
32 7.4 Examples of pressure-loaded areas Ap and metallic cross-sectional areas Af
7.4.1 General
33 7.4.2 Cylindrical valve bodies
35 7.4.3 Spherical valve bodies
36 7.4.4 Oval and rectangular cross-sections
37 7.4.5 Details
40 8 Calculation methods for bonnets and covers
8.1 General
8.2 Covers made of flat plates
8.2.1 General
45 8.2.2 Circular cover without opening, with
46 8.2.3 Circular covers with concentric circular opening, with
47 8.2.4 Non-circular covers (elliptical or rectangular)
48 8.2.5 Special covers made of flat circular plates for specific load and clamping conditions
63 8.3 Covers consisting of a spherically domed end and an adjoining flanged ring
8.3.1 General
64 8.3.2 Wall thickness and strength calculation of the spherical segment
65 8.3.3 Calculation of the flanged ring
8.3.3.1 Strength condition
8.3.3.2 Forces and moments of Formulae (126) and (127)
66 8.3.3.3 Forces in the moment Formulae (129) and (130)
67 8.3.3.4 Other geometrical dimensions in the Formulae (126) and (127)
8.3.3.5 Diameter of centre of gravity
8.3.4 Reinforcement of the stuffing box area
8.4 Dished heads
8.4.1 General remarks
68 8.4.2 Solid dished heads
69 8.4.3 Dished heads with opening
71 8.4.4 Allowances on the wall thickness
72 9 Calculation method for pressure sealed bonnets and covers
74 10 Calculation methods for flanges
10.1 General
10.2 Circular flanges
10.2.1 General
75 10.2.2 Flanges with tapered neck
77 10.2.3 Flanges greater than DN 1 000
78 10.2.4 Welding neck with tapered neck according to Figure 48
79 10.2.5 Weld-on flanges
10.2.5.1 Weld-on flanges in accordance with Figure 49, design A and design B, and integral flange in accordance with Figure 50
80 10.2.5.2 Welded-on collars in accordance with Figure 51
82 10.2.6 Reverse flanges
10.2.7 Loose flanges
84 10.3 Oval flanges
10.3.1 Oval flanges in accordance with Figure 54
86 10.3.2 Oval flanges in accordance with Figure 55
88 10.4 Rectangular or square flanges
10.4.1 Rectangular or square flanges in accordance with Figure 57
89 10.4.2 Rectangular slip-on flanges in accordance with Figure 58
90 10.5 Calculation of the bolt diameter
10.5.1 Design temperature
10.5.2 Diameter of the nominal tensile stress
10.5.3 Load cases
91 10.5.4 Safety factors and allowances
11 Calculation methods for glands
11.1 Loads
92 11.2 Gland bolts
11.3 Gland flanges
11.4 Other components
12 Fatigue
13 Marking
93 Annex A (informative)Characteristic values of gaskets and joints
106 Annex B (informative)Calculation procedure
108 Annex ZA (informative)!Relationship between this European Standard and the essential requirements of Directive 2014/68/EU aimed to be covered

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BS EN 12516-2:2014+A1:2021
$215.11