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BS EN 12516-1:2014+A1:2018

BS EN 12516-1:2014+A1:2018

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

Published By Publication Date Number of Pages
BSI 2018 206
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This European Standard specifies the tabulation method for determining the wall thickness of valve bodies, bonnets and covers with essentially circular cross-section made in forged, cast or fabricated steel.

For valve shells with oval, rectangular or non-circular shapes, see 8.6.

The range of PN or Class designations for which thicknesses are tabulated is:

PN 2,5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 320, PN 400, Class 150, Class 300, Class 600, Class 900, Class 1 500, Class 2 500, Class 4 500.

Pressure/temperature ratings are specified for each material group for the above PN Standard Class and Special Class designations.

The non-destructive examination procedures and acceptance levels that need to be applied to the valve shell components in order for the valve to be used at Special Class pressure/temperature ratings are defined.

Details are also given for the alternative rules for small bore valves of DN 65 and smaller designated as Limited Class.

This standard does not apply to threaded end valves:

  • DN 80 or larger;

  • or which have pressure ratings greater than Class 2 500;

  • or which operate at temperatures greater than 540 Ā°C.

Socket welding end valves DN 80 or larger are outside the scope of this standard.

PDF Catalog

PDF Pages PDF Title
2 undefined
11 1 Scope
2 Normative references
12 3 Terms and definitions
13 4 Symbols and units
14 5 Material groups and material temperature limitations
6 Pressure/temperature (p/t) ratings
6.1 General
6.2 Standard rating
6.3 Special Class
6.4 Limited Class
6.5 Intermediate ratings
6.6 Flanged ratings
15 7 Temperature effects
7.1 Temperature limits
7.2 Fluid thermal expansion
8 Dimensions
8.1 Minimum wall thickness
8.2 Inside diameter
16 8.3 Valve body necks
18 8.4 Local areas
8.5 Contours at body ends
8.5.1 Butt welding ends
8.5.2 Socket welding and threaded ends
19 8.6 Additional metal thickness
8.7 Bonnets, cover and connections
8.8 Wafer or flangeless valves
21 9 Auxiliary connections
9.1 General
9.2 Pipe thread tapping
9.3 Socket welding
22 9.4 Butt welding
9.5 Bosses
23 10 End dimensions
10.1 Flanged ends
10.2 Butt welding ends
10.3 Socket welding ends
10.4 Threaded ends
10.5 Intermediate rated socket welding and threaded ends
11 Marking
11.1 Standard rating valves
11.2 Special Class valves
24 11.3 Limited Class valves
11.4 Intermediate rating valves
74 Annex A (normative)Methods used for establishing pressure/temperature ratings
A.1 Minimum wall thickness
75 A.2 Material properties
76 A.3 Pressure/temperature ratings
A.3.1 General
77 A.3.2 Selected stress values for steels from group 3E0 to 9E1
A.3.3 Selected stress values for steels from group 10E0 to 16E0
A.3.4 Maximum ratings
78 Annex B (informative)Material groups
80 Annex C (informative)Special Class
C.1 General
C.2 Required examination
C.2.1 Castings
C.2.1.1 General requirements
81 C.2.1.2 Volumetric inspection requirements
82 C.2.1.3 Surface examination
C.2.2 Forgings, bars, plates and tubular products
83 C.2.3 Drop forgings
C.2.4 Welded fabrication
C.2.5 Defect removal and repair ā€” Repair by welding
89 C.3 Method for establishing Special rating
C.3.1 Methods for all materials
90 C.3.2 Special ratings
110 Annex D (informative)Radiographic procedure and acceptance standards
D.1 Radiographic procedure
111 D.2 Acceptance standards
112 Annex E (informative)Magnetic particle examination procedure and acceptance standards
E.1 General
E.2 Acceptance standards
E.2.1 Castings
E.2.1.1 Linear indications
E.2.1.2 Rounded/non-linear indications
E.2.1.3 Procedure
E.2.2 Forgings and rolled or wrought material and drop forgings
E.2.2.1 Linear indications
113 E.2.2.2 Procedure
114 Annex F (informative)Liquid penetrant examination procedure and acceptance standards
F.1 Procedure
F.2 Acceptance criteria
F.2.1 Castings
F.2.1.1 Linear indications
F.2.1.2 Rounded/non-linear indications
F.2.2 Forgings, rolled or wrought material and drop forgings
F.2.2.1 Linear indications
F.2.2.2 Procedure
115 Annex G (informative)Ultrasonic examination procedure and acceptance standards
G.1 Procedure for forgings and rolled or wrought material
G.1.1 General
G.1.2 Extent of examination
G.1.3 Acceptance standards
G.2 Procedure for castings
G.2.1 General
G.2.2 Extent of examination
G.2.3 Acceptance standards
116 Annex H (informative)Requirement for Limited Class valves in sizes DN 65 and smaller
H.1 General
H.2 Limited Class rating method
117 H.3 Dimensions
H.3.1 General
H.3.2 Inside diameter
H.3.3 Wall thickness
H.3.4 Valve body necks
H.3.5 Contours for body run transitions
H.3.6 Additional metal thickness
118 H.3.7 Welded fabrication
119 Annex I (informative)ASTM/ASME material
I.1 General
I.2 Material groups
120 I.3 Minimum wall thickness
I.4 Material properties
I.5 Pressure/temperature ratings
I.5.1 Standard rating
I.5.1.1 ļ»æ!Method for steels from group 1C1 to 1C15″
I.5.1.2 ļ»æ! Method for steels from group 2C1 to 2C8″
I.5.2 Special rating
198 Annex J (informative)Relationship between DN, NPS, pipe inside diameter Dni, pipe outside diameter OD
202 Annex ZA (informative)Relationship between this European Standard and the essential requirements of Directive 2014/68/EU (PED) aimed to be covered

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