EN 736-2:2016

Valves - Terminology - Part 2: Definition of components of valves

This European Standard specifies the names of components of valves and their definitions. It has the purpose to provide a uniform terminology for all components of valves.
This European Standard covers components common to more than one type of valve. Names of components and definitions specific to one type of valve will be found in the relevant product or performance standard.

Armaturen - Terminologie - Teil 2: Definition der Armaturenteile

Diese Europäische Norm legt die Benennungen von Armaturenteilen und deren Definitionen fest. Sie hat den Zweck, eine einheitliche Terminologie für alle Armaturenteile herbeizuführen.
Diese Europäische Norm erstreckt sich auf Armaturenteile, die in mehr als einer Bauart angewandt werden. Benennungen und Definitionen für nur eine spezielle Armaturenbauart sind in der entsprechenden Produkt- oder Betriebsverhaltensnorm angegeben.

Appareils de robinetterie - Terminologie - Partie 2: Définition des composants des appareils de robinetterie

La présente Norme européenne spécifie les termes des composants d'appareils de robinetterie et donne leurs définitions. Elle a pour objet de proposer une terminologie unique de tous les composants des appareils de robinetterie.
La présente Norme européenne concerne les composants communs à plus d'un type d'appareil de robinetterie. Les termes et les définitions spécifiques à un type d'appareil de robinetterie se trouvent dans les normes de produit ou d'aptitude à l'emploi correspondantes.

Ventili - Terminologija - 2. del: Definicija sestavnih delov ventilov

Ta evropski standard določa imena komponent ventilov in njihove definicije. Njegov namen je zagotavljanje enotne terminologije za vse komponente ventilov.
Ta evropski standard pokriva komponente, skupne za več kot eno vrsto ventilov. Imena komponent in definicije, značilne posebej za eno določeno vrsto ventilov, so na voljo v relevantnem standardu za izdelek ali delovanje.

General Information

• Status: Published
• Publication Date: 02-Feb-2016
• ICS: 01.040.23 - Fluid systems and components for general use (Vocabularies)
• 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: 9093 - Decision to confirm - Review Enquiry
• Start Date: 20-Oct-2021
• Completion Date: 14-Apr-2025
• Ref Project: SIST EN 736-2:2016 - Valves - Terminology - Part 2: Definition of components of valves

Relations

• Replaces: EN 736-2:1997 - Valves - Terminology - Part 2: Definition of components of valves
• Effective Date: 10-Feb-2016

Overview

EN 736-2:2016 - Valves - Terminology - Part 2: Definition of components of valves (CEN) is a European Standard that establishes a uniform terminology for valve components. It specifies the names and definitions of components common to more than one valve type (body, bonnet, trim, seating, packing, operating mechanism, etc.) to harmonize language used by manufacturers, specifiers and standards committees across Europe. EN 736-2:2016 supersedes EN 736-2:1997 and includes updates to clause 3 (terms and definitions) and Annex A (glossary).

Key topics and requirements

• Scope and purpose: Provide consistent names and precise definitions for components of valves used across multiple valve types.
• Component coverage: Definitions for shell components (body, bonnet, flanged/welding/threaded ends), trim and functional parts (obturator/disc, seat rings, liners), operating mechanism (stem, shaft, yoke, actuator), seating and sealing (body seat, obturator seat, packing, bellows seal), and operating devices (handwheel, lever, actuator, extensions).
• Structure: Contains clause 3 (Terms and definitions), an informative Annex A glossary with multilingual equivalents (English, French, German), and a bibliography.
• Harmonization guidance: Experts drafting product or performance standards are asked to adopt the component names and definitions from EN 736-2 to ensure cross-standard consistency.
• Implementation: CEN members were required to adopt this as a national standard; it is intended to be used as a reference vocabulary rather than a performance specification.

Applications and who uses it

EN 736-2:2016 is practical for:

• Valve manufacturers - standard naming for drawings, parts lists, and technical documentation.
• Design and engineering teams - consistent component references in specifications, piping and instrumentation diagrams (P&IDs), and procurement documents.
• Purchasers and asset owners - unambiguous identification of valve parts and replacement components.
• Standards committees and technical authors - harmonizing terminology across product standards and technical publications.
• Maintenance and inspection personnel - clearer communication about packing, seat rings, bonnets and other components during servicing.

Related standards

• EN 736-1: Definition of types of valves (Part 1)
• EN 736-3: Definition of terms (Part 3)
• EN 736-2:2016 supersedes EN 736-2:1997

Keywords: EN 736-2:2016, valves terminology, definition of components of valves, valve components glossary, CEN, industrial valves, valve body, bonnet, trim, packing, seat ring.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2016
1DGRPHãþD
SIST EN 736-2:2000
Ventili - Terminologija - 2. del: Definicija sestavnih delov ventilov
Valves - Terminology - Part 2: Definition of components of valves
Armaturen - Terminologie - Teil 2: Definition der Armaturenteile
Appareils de robinetterie - Terminologie - Partie 2 : Définition des composants des
appareils de robinetterie
Ta slovenski standard je istoveten z: EN 736-2:2016
ICS:
01.040.23 7HNRþLQVNLVLVWHPLLQVHVWDYQL Fluid systems and
GHOL]DVSORãQRUDER6ORYDUML components for general use
(Vocabularies)
23.060.01 Ventili na splošno Valves in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 736-2
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2016
EUROPÄISCHE NORM
ICS 01.040.23; 23.060.01 Supersedes EN 736-2:1997
English Version
Valves - Terminology - Part 2: Definition of components of
valves
Appareils de robinetterie - Terminologie - Partie 2: Armaturen - Terminologie - Teil 2: Definition der
Définition des composants des appareils de Armaturenteile
robinetterie
This European Standard was approved by CEN on 15 December 2015.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 736-2:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
Annex A (informative) Glossary . 14
Bibliography . 18

European foreword
This document (EN 736-2:2016) has been prepared by Technical Committee CEN/TC 69 “Industrial
valves”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2016, and conflicting national standards shall
be withdrawn at the latest by August 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN 736-2:1997.
The main changes compared to the previous edition are:
a) Clause 3 “Terms and definitions” has been updated;
b) Annex A has been updated.
EN 736 comprises three parts:
— Part 1: Definition of types of valves
— Part 2: Definition of components of valves
— Part 3: Definition of terms
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Introduction
This is the first step in harmonizing the valve terminology in Europe. It is possible that other names of
components or other definitions will be found in other European Standards.
Experts establishing European Standards are asked to use the name of components and the definitions
given in this European Standard. If other names of components or definitions are needed or already
published in European Standards please contact the CEN/TC 69 Secretariat for adding or harmonizing
the names of components and their definitions in these European Standards.
1 Scope
This European Standard specifies the names of components of valves and their definitions. It has the
purpose to provide a uniform terminology for all components of valves.
This European Standard covers components common to more than one type of valve. Names of
components and definitions specific to one type of valve will be found in the relevant product or
performance standard.
2 Normative references
Not applicable.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
shell
pressure containing envelope of the valve
Note 1 to entry: It normally comprises the body and when included in the design a bonnet or cover and the body
bonnet or body cover joint excluding sealing parts.
3.1.1
body
main component of the valve which provides the fluid flow passageways and the body ends
3.1.1.1
straight pattern body
body having two body end ports and where the axis of the bonnet or cover is parallel to the faces of the
body end ports
3.1.1.2
angle pattern body
body having two body end ports and where the faces are at right angles
3.1.1.3
oblique pattern body
body having two body end ports and where the axis of the bonnet or cover is not parallel to the faces of
the body end ports
3.1.1.4
double flanged body
body having two flanged body ends for connecting to corresponding flanges
3.1.1.5
single flanged body
body with a single flange not being a body end flange, designed to be installed by bolting to adjacent
pipe flange(s)
Note 1 to entry: It can be suitable to close the end of the pipe line allowing dismantling of the downstream pipe
line.
3.1.1.6
lug type body
body designed with threaded or unthreaded holes for bolting to the adjacent flange(s) of the pipeline
3.1.1.7
wafer type body
body designed to be installed by clamping between flanges
3.1.1.8
multi end body
body with more than two body end ports
3.1.1.9
body end
part of the body provided with the means of connection to the piping component (excluding by-pass if
fitted)
3.1.1.10
flanged end
body end provided with a flange for mating with a corresponding flange
3.1.1.11
welding end
body end prepared for welding to a corresponding end of a component, which can be of the butt
welding or socket welding type
3.1.1.12
butt welding end
body end prepared for welding to a component by abutting the ends and welding within the groove
formed between the prepared ends
3.1.1.13
socket welding end
body end prepared for insertion of a component end into the socket and joining and sealing by fillet
welding
3.1.1.14
threaded end
body end provided with internal or external thread for mating with a corresponding threaded
component
3.1.1.15
socket end
body end prepared for connection to a spigot end
3.1.1.16
spigot end
body end prepared for insertion in a socket
3.1.1.17
capillary end
body end prepared for connection to a tube by soldering or brazing
3.1.1.18
compression end
body end prepared for connection to a tube by the compression of a ring or sleeve on to the outside
surface of a tube by a tubing nut
3.1.1.19
body end port
fluid flow opening in the body end
3.1.1.20
body bonnet/cover flange
flange on a body to which the bonnet or cover is bolted
3.1.1.21
body bonnet/cover thread
thread on the body into or onto which the bonnet or cover is screwed
3.1.1.22
boss
raised area on the surface of a component
3.1.1.23
shell tapping
threaded hole in the wall of the shell
3.1.1.24
by-pass
piping loop provided to permit fluid flow from one side to the other side of the main valve obturator in
its closed position
3.1.2
bonnet
component of the shell which closes an opening in the body and contains an opening for the passage of
the operating mechanism
3.1.2.1
cover
component of the shell which provides a closure for an opening in the body
3.1.2.2
bolted bonnet
bonnet connected to a body by bolting
3.1.2.3
bolted cover
cover connected to a body by bolting
3.1.2.4
screwed bonnet
bonnet which is screwed into or onto the body
3.1.2.5
screwed cover
cover which is screwed into or onto the body
3.1.2.6
welded bonnet
bonnet connected to the body by a weld which provides mechanical attachment and sealing
3.1.2.7
welded cover
cover connected to the body by a weld which provides mechanical attachment and sealing
3.1.2.8
union bonnet
bonnet connected to a body by means of a union nut
3.1.2.9
union cover
cover connected to a body by means of a union nut
3.1.2.10
pressure sealed bonnet
bonnet connected to the body using a pressure seal joint
3.1.2.11
pressure sealed cover
cover connected to the body using a pressure seal joint
3.1.2.12
clamp ring
ring which connects two components by means of clamping
3.1.3
body bonnet/cover joint
connection of the valve body to the bonnet or the cover
3.1.3.1
bonnet flange
flange on the bonnet by which the bonnet is bolted to the body
3.1.3.2
cover flange
flange on the cover by which the cover is bolted to the body
3.1.3.3
bonnet thread
thread on the bonnet by which the bonnet is screwed into or onto the body
3.1.3.4
cover thread
thread on the cover by which the cover is screwed into or onto the body
3.1.3.5
bonnet bolting
bolting which connects the bonnet to the body
3.1.3.6
cover bolting
bolting which connects the cover to the body
3.1.3.7
union nut
threaded ring which connects the union bonnet or cover to the body
3.1.3.8
body bonnet
cover gasket
gasket which seals the body bonnet/cover joint
Note 1 to entry: The gasket can be made in different shapes and of different materials.
3.1.3.9
pressure seal joint
body bonnet/cover joint in which the internal fluid pressure increases the compressive loading on the
bonnet/cover gasket or pressure seal ring
3.1.3.10
pressure seal ring
ring which acts as the sealing component in a pressure seal joint
3.1.3.11
seal weld
weld which provides a seal between two parts, for example body and bonnet/cover
3.2
trim
functional
...