EN 16722:2015

• Abstract:

  his European Standard specifies the end-to-end and centre-to-end dimensions for valves with threaded ends with connecting dimensions in compliance with EN ISO 228 1 or EN 10226 1, used in PN and Class designated piping systems.; The range of PN is:; - PN 10; PN 16; PN 25; PN 40; PN 63; PN 100; PN 160; PN 250; PN 320; PN 400.; The range of Class is:; - Class 150, Class 300, Class 600, Class 900, Class 1 500, Class 2 500.; The range of nominal size is:; - DN 4; DN 6; DN 8; DN 10; DN 15; DN 20; DN 25; DN 32; DN 40; DN 50; DN 65; DN 80; DN 100.; NOTE 1 See Annex C for the relationship between nominal size (DN) and nominal pipe size (NPS).; NOTE 2 Valves having screwed end profiles different from those specified in EN ISO 228 1 or EN 10226–1, may use the same dimensions than those specified in Table 1.

• Status: Published
• Publication Date: 29-Sep-2015
• ICS: 23.060.01 - Valves in general
• Technical Committee: CEN/TC 69 - Industrial valves
• Drafting Committee: CEN/TC 69/WG 1 - Basic standards
• Current Stage: 9020 - Submission to 2 Year Review Enquiry - Review Enquiry
• Start Date: 15-Jul-2026
• Completion Date: 15-Jul-2026
• Ref Project: SIST EN 16722:2015 - Industrial valves - End-to-end and centre-to-end dimensions for valves with screwed ends

• Refers: EN 736-3:2008 - Valves - Terminology - Part 3: Definition of terms
• Effective Date: 28-Jan-2026
• Refers: EN 736-1:1995 - Valves - Terminology - Part 1: Definition of types of valves
• Effective Date: 28-Jan-2026
• Refers: EN 736-2:1997 - Valves - Terminology - Part 2: Definition of components of valves
• Effective Date: 28-Jan-2026
• Referred By: EN 16767:2016 - Industrial valves - Steel and cast iron check valves
• Effective Date: 28-Jan-2026
• Referred By: EN 16767:2020 - Industrial valves - Metallic check valves
• Effective Date: 28-Jan-2026

Overview

EN 16722:2015 - published by CEN - defines the end-to-end (ETE) and centre-to-end (CTE) dimensions for industrial valves with threaded/screwed ends whose connecting threads comply with EN ISO 228-1 or EN 10226-1. The standard covers valves used in PN (pressure nominal) and ASME/Class designated piping systems and provides basic dimension series, tolerances, and application-specific series for common valve types.

Key facts:

• Standard: EN 16722:2015 (CEN)
• Scope: ETE and CTE dimensions for valves with threaded ends
• PN range: PN 10, 16, 25, 40, 63, 100, 160, 250, 320, 400
• Class range: Class 150, 300, 600, 900, 1500, 2500
• Nominal sizes (DN): DN 4, 6, 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100

Key Topics and Requirements

• Basic dimension series: Table 1 lists the basic series of lengths (l) for ETE and CTE applicable to valve types. Annex B explains origin of series.
• Valve-type series: Specific series selections for gate, ball, globe, lift-check, three-way valves and automatic steam traps are given in Tables 3–7.
• Tolerances: Tolerances on ETE and CTE dimensions are specified by size ranges (see Table 2), ensuring interchangeability and consistent installation space.
• Thread compatibility: Connectors are referenced to EN ISO 228-1 and EN 10226-1; Annex A maps DN to internal thread designations (and includes ASME NPT equivalence).
• Definitions and figures: Terms such as ETE, CTE and ETE+CTE are defined and illustrated to remove ambiguity.
• Informative annexes: Annex C provides DN to NPS relationship for systems that mix metric and imperial pipe sizes.

Applications and Users

EN 16722 is intended for:

• Valve manufacturers and designers - to standardize face-to-face and centre-to-end lengths for threaded-end valve product families.
• Piping and mechanical engineers - for accurate layout, spool piece and support design in PN/Class systems.
• Procurement and specification writers - to reference compliant dimensions in tenders and product procurement.
• Maintenance and installation teams - to ensure replacement valves fit existing threaded connections without rework.

Practical benefits include improved interchangeability, simplified piping layout, and reduced risk of misfit during retrofits or new installations.

Related Standards

Commonly used with:

• EN ISO 228-1 (pipe threads not pressure-tight)
• EN 10226-1 (taper external/parallel internal threads)
• EN 558 (face-to-face dimensions for flanged valves)
• EN 12516-1, EN 12627 and ASME standards (B16.10, B16.34) for complementary valve and piping design requirements

Keywords: EN 16722, industrial valves, end-to-end dimensions, centre-to-end dimensions, threaded ends, PN, Class, DN, EN ISO 228-1, EN 10226-1, valve tolerances, valve basic series.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.OMXþNLIndustriearmaturen - Baulängen für Armaturen mit Innengewinde-AnschlussRobinetterie industrielle - Dimensions extrémité à extrémité et axe à extrémité pour les appareils de robinetterie à embouts taraudésIndustrial valves - End-to-end and centre-to-end dimensions for valves with screwed ends23.060.01Ventili na splošnoValves in generalICS:Ta slovenski standard je istoveten z:EN 16722:2015SIST EN 16722:2015en,fr,de01-december-2015SIST EN 16722:2015SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16722
September
t r s w ICS
t uä r x rä r s English Version
Industrial valves æ Endætoæend and centreætoæend dimensions for valves with threaded ends Robinetterie industrielle æ Dimensions extrémité à extrémité et axe à extrémité pour les appareils de robinetterie à embouts filetés
Industriearmaturen æ Baulängen für Armaturen mit InnengewindeæAnschluss This European Standard was approved by CEN on
s w August
t r s wä
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 Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey andUnited Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
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t r s w CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s x y t tã t r s w ESIST EN 16722:2015

(informative)
Relationship between DN (nominal size) and internal thread . 16 Annex B (informative)
Origin of basic series . 17 Annex C (informative)
Relationship between DN (nominal size) and nominal pipe size (NPS) . 18 Bibliography . 19
a) Straight and oblique pattern valve
b) Angle pattern valve
c) Three-way valve Key Figure 1 a) ETE with ETE = l Figure 1 b) CTE with CTE = l
...