EN 12516-1:2014+A1:2018
(Main + Amendment)Industrial valves - Shell design strength - Part 1: Tabulation method for steel valve shells
General Information
- Abstract
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 °C.
Socket welding end valves DN 80 or larger are outside the scope of this standard.
- Status
- Published
- Publication Date
- 11-Sep-2018
- Withdrawal Date
- 30-Mar-2019
- Technical Committee
- CEN/TC 69 - Industrial valves
- Drafting Committee
- CEN/TC 69/WG 1 - Basic standards
- Current Stage
- 9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
- Start Date
- 09-Oct-2025
- Completion Date
- 23-Sep-2026
- Directive
- Harmonized Standard2014/68/EU - Directive 2014/68/EU of the European Parliament and of the Council of 15 May 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of pressure equipmentOJ Ref: L 250/95 OJ Date: 30-Sep-2019
Overview - EN 12516-1:2014+A1:2018 (Industrial valves - Shell design strength)
EN 12516-1:2014+A1:2018 establishes a tabulation method for determining wall thickness of steel valve shells (bodies, bonnets and covers) with essentially circular cross-sections. The standard provides pressure/temperature (p/t) ratings for a broad range of nominal pressure (PN) and ASME Class designations, defines material groups and temperature limitations, and specifies non‑destructive examination (NDE) requirements when higher (“Special Class”) ratings are required.
Keywords: SIST EN 12516-1, industrial valves, shell design strength, tabulation method, valve shells, pressure/temperature ratings, non‑destructive examination.
Key technical topics and requirements
- Tabulation method: Prescribed tables to select minimum wall thickness for forged, cast or fabricated steel valve shells for circular cross-sections.
- Covered PN and Class ranges: PN 2.5, 6, 10, 16, 25, 40, 63, 100, 160, 250, 320, 400 and Class 150, 300, 600, 900, 1500, 2500, 4500.
- Material groups and temperature limits: Material-specific p/t ratings and temperature limitations are provided (see Annex B and Annex A procedures).
- Special Class vs Standard/ Limited Class:
- Standard rating - default tabulated values.
- Special Class - elevated p/t ratings requiring defined NDE procedures and acceptance levels (Annex C and Annexes D–G).
- Limited Class - alternative rules for small‑bore valves (DN 65 and smaller) given in Annex H.
- Non‑destructive examination (NDE): Radiography, magnetic particle, liquid penetrant and ultrasonic procedures and acceptance criteria are defined for achieving Special Class ratings (Annexes D–G).
- Dimensional rules: Minimum wall thickness, inside diameter, necks, local areas, contours (butt/socket/threaded ends), auxiliary connections and marking requirements are covered (Clauses 8–11).
- Scope exclusions: Does not apply to threaded end valves DN ≥ 80, valves with pressure ratings > Class 2500, or valves operating above 540 °C. Socket‑weld ends DN ≥ 80 are outside scope.
Practical applications and users
- Valve designers and mechanical engineers applying standard tabulated thicknesses for safe shell design.
- Valve manufacturers and fabricators (forge, cast, welded) specifying dimensions and fabrication/NDE requirements.
- Inspection and QA personnel using NDE acceptance criteria for Special Class certification.
- Procurement, project engineers and compliance officers ensuring valves meet required p/t ratings and PED-related provisions.
Related standards and references
- EN 12516 series (other parts addressing different materials/methods).
- Annex ZA links this standard to Directive 2014/68/EU (PED) for pressure equipment conformity.
- Annex I covers relationships to ASTM/ASME materials and Annex J for DN/NPS conversions.
SIST EN 12516-1 is a practical reference for ensuring mechanical integrity and regulatory compliance when specifying steel valve shells across a wide pressure/temperature range.
Relations
- Effective Date
- 19-Jan-2023
- Effective Date
- 19-Jan-2023
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
EN 12516-1:2014+A1:2018 is a standard published by the European Committee for Standardization (CEN). Its full title is "Industrial valves - Shell design strength - Part 1: Tabulation method for steel valve shells". This standard covers: 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 °C. Socket welding end valves DN 80 or larger are outside the scope of this standard.
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 °C. Socket welding end valves DN 80 or larger are outside the scope of this standard.
EN 12516-1:2014+A1:2018 is classified under the following ICS (International Classification for Standards) categories: 23.060.01 - Valves in general. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 12516-1:2014+A1:2018 has the following relationships with other standards: It is inter standard links to EN 12516-1:2014/FprA1, EN 12516-1:2014, EN 10222-2:1999, EN 10222-4:1998, EN 10028-2:2009, EN 1759-1:2004, EN 10222-3:1998, EN 12516-2:2014, EN 12627:1999, EN 10213:2007, EN 736-1:2018, EN 1092-1:2007+A1:2013, EN 10222-5:1999, EN ISO 9692-1:2013, EN 736-3:2008. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 12516-1:2014+A1:2018 is associated with the following European legislation: EU Directives/Regulations: 2014/68/EU; Standardization Mandates: M/071. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
EN 12516-1:2014+A1:2018 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.YHQWLORYIndustriearmaturen - Gehäusefestigkeit - Teil 1: Tabellenverfahren für drucktragende Gehäuse von Armaturen aus StahlRobinetterie industrielle - Résistance mécanique des enveloppes - Partie 1 : Méthode tabulaire relative aux enveloppes d'appareils de robinetterie en acierIndustrial valves - Shell design strength - Part 1: Tabulation method for steel valve shells23.060.01Ventili na splošnoValves in generalICS:Ta slovenski standard je istoveten z:EN 12516-1:2014+A1:2018SIST EN 12516-1:2015+A1:2018en,fr,de01-december-2018SIST EN 12516-1:2015+A1:2018SLOVENSKI
STANDARDSIST EN 12516-1:20151DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12516-1:2014+A1
September
t r s z ICS
t uä r x rä r s Supersedes EN
s t w s xæ sã t r s vEnglish Version
Industrial valves æ Shell design strength æ Part
sã Tabulation method for steel valve shells Robinetterie industrielle æ Résistance mécanique des enveloppes æ Partie
s ã Méthode tabulaire relative aux enveloppes d 5appareils de robinetterie en acier
Industriearmaturen æ Gehäusefestigkeit æ Teil
sã Tabellenverfahren für drucktragende Gehäuse von Armaturen aus Stahl This European Standard was approved by CEN on
{ August
t r s v and includes Amendment
s approved by CEN on
s x March
t r s zä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels
t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s t w s xæ sã t r s v ªA sã t r s z ESIST EN 12516-1:2015+A1:2018
Methods used for establishing pressure/temperature ratings. 72 A.1 Minimum wall thickness . 72 A.2 Material properties . 73 A.3 Pressure/temperature ratings . 74 A.3.1 General . 74 A.3.2 Selected stress values for steels from group 3E0 to 9E1 . 75 A.3.3 Selected stress values for steels from group 10E0 to 16E0 . 75 A.3.4 Maximum ratings . 75 Annex B (informative)
Material groups . 76 Annex C (informative)
Special Class . 78 C.1 General . 78 C.2 Required examination . 78 C.2.1 Castings . 78 C.2.2 Forgings, bars, plates and tubular products . 80 C.2.3 Drop forgings. 81 C.2.4 Welded fabrication . 81 C.2.5 Defect removal and repair — Repair by welding . 81 C.3 Method for establishing Special rating . 87 C.3.1 Methods for all materials . 87 C.3.2 Special ratings . 88 Annex D (informative)
Radiographic procedure and acceptance standards . 108 D.1 Radiographic procedure . 108 D.2 Acceptance standards . 109 Annex E (informative)
Magnetic particle examination procedure and acceptance standards . 110 E.1 General . 110 E.2 Acceptance standards . 110 E.2.1 Castings . 110 E.2.2 Forgings and rolled or wrought material and drop forgings . 110 Annex F (informative)
Liquid penetrant examination procedure and acceptance standards . 112 F.1 Procedure . 112 F.2 Acceptance criteria . 112 F.2.1 Castings . 112 F.2.2 Forgings, rolled or wrought material and drop forgings . 112 Annex G (informative)
Ultrasonic examination procedure and acceptance standards . 113 G.1 Procedure for forgings and rolled or wrought material . 113 G.1.1 General . 113 G.1.2 Extent of examination . 113 G.1.3 Acceptance standards . 113 G.2 Procedure for castings . 113 G.2.1 General . 113 G.2.2 Extent of examination . 113 G.2.3 Acceptance standards . 113 Annex H (informative)
Requirement for Limited Class valves in sizes DN 65 and smaller . 114 H.1 General . 114 H.2 Limited Class rating method . 114 H.3 Dimensions . 115 SIST EN 12516-1:2015+A1:2018
ASTM/ASME material . 117 I.1 General . 117 I.2 Material groups . 117 I.3 Minimum wall thickness . 118 I.4 Material properties . 118 I.5 Pressure/temperature ratings . 118 I.5.1 Standard rating . 118 I.5.2 Special rating . 118 Annex J (informative)
Relationship between DN, NPS, pipe inside diameter Dni, pipe outside diameter OD . 196 Annex ZA (informative)
Relationship between this European Standard and the essential requirements of Directive 2014/68/EU (PED) aimed to be covered . 200 Bibliography . 201
a) Section of valve body run
b) Section of valve body neck Figure 1 — Valve body run and neck SIST EN 12516-1:2015+A1:2018
Figure 2 — Wall thickness, esoc , for socket welding and threaded ends 8.6 Additional metal thickness Body metal thickness resulting from assembly loads, opening and closing forces of large actuators, stress concentrations particularly in the crotch area, opening in enlarged body cavities and some types of fabricated valves shall be provided in accordance to EN 12516-2 to ensure adequate strength and rigidity. For non-circular bodies with
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