SIST EN 16767:2020

SLOVENSKI STANDARD
SIST EN 16767:2020
01-junij-2020
Nadomešča:
SIST EN 16767:2016
Industrijski ventili - Kovinski protipovratni ventili
Industrial valves - Metallic check valves
Industriearmaturen - Rückflussverhinderer aus Gusseisen und Stahl
Robinetterie industrielle - Clapets de non-retour métalliques
Ta slovenski standard je istoveten z: EN 16767:2020
ICS:
23.060.50 Blokirni ventili Check valves
SIST EN 16767:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 16767:2020

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SIST EN 16767:2020


EN 16767
EUROPEAN STANDARD

NORME EUROPÉENNE

April 2020
EUROPÄISCHE NORM
ICS 23.060.50 Supersedes EN 16767:2016
English Version

Industrial valves - Metallic check valves
Robinetterie industrielle - Clapets de non-retour Industriearmaturen - Metallische
métalliques Rückflussverhinderer
This European Standard was approved by CEN on 17 February 2020.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16767:2020 E
worldwide for CEN national Members.

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SIST EN 16767:2020
EN 16767:2020 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 5
3 Terms and definitions . 6
4 Requirements . 7
4.1 General . 7
4.2 Design . 7
4.2.1 Shell design strength . 7
4.2.2 Materials . 7
4.2.3 Pressure/temperature ratings . 7
4.2.4 Dimensions . 9
4.2.5 Operation . 10
4.2.6 Auxiliary connections . 10
4.2.7 Permanent joining of the steel body . 10
4.3 Functional characteristics . 10
4.3.1 Seat leakage . 10
4.3.2 Flow characteristics . 11
4.3.3 Anti-blow out design . 11
5 Test procedures . 11
6 Declaration of compliance . 11
7 Designation. 12
8 Marking, preparation for storage and transportation . 12
8.1 Marking . 12
8.1.1 Mandatory marking. 12
8.1.2 Supplementary marking . 12
8.2 Preparation for storage and transportation . 13
Annex A (informative) Information to be supplied by the purchaser . 14
Annex B (informative) Correspondence between DN and NPS . 15
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU aimed to be covered . 16
Bibliography . 17

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SIST EN 16767:2020
EN 16767:2020 (E)
European foreword
This document (EN 16767:2020) 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 October 2020, and conflicting national standards shall
be withdrawn at the latest by October 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 16767:2016.
This document has been prepared under a standardization request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of
EU Directive.
For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document.
The main changes are the following:
— inclusion of copper alloy check valves (in Clause 1 and in 4.2);
— update of the normative references;
— addition of informative Annex B giving the correspondence between DN and NPS;
— update of Annex ZA according to Directive 2014/68/EU.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
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SIST EN 16767:2020
EN 16767:2020 (E)
1 Scope
This document specifies the general requirements for metallic check valves, which are forged, cast or
fabricated in straight, angle or oblique pattern (see EN 736-2) with end connections flanged or wafer,
butt welding, socket welding, or threaded.
This document applies to metallic check valves used for all industrial applications.
Additional requirements given in the relevant application standards may apply to check valves used for
more specific applications (e.g. for the water industry, the chemical and petrochemical process industry,
the gas distribution industry).
Sanitary check valves and back flow prevention anti-pollution check valves are excluded from the scope
of this document.
NOTE 1 Double disc type and tilting disc type are also based on butterfly valve and are in the scope of this
document.
The range of nominal sizes covered is:
— DN 8, DN 10; DN 12, DN 15; DN 20; DN 25; DN 32; DN 40; DN 50; DN 65; DN 80; DN 100; DN 125;
DN 150; DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600; DN 700; DN 750;
DN 800; DN 900; DN 1 000; DN 1 200.
DN 8 and DN 12 are not used for PN designated flanged end connections.
DN 8, DN 10 and DN 12 are not used for Class designated flanged end connections.
DN 750 is used for Class designated check valves only.
Socket welding end check valves and threaded end check valves are limited to the range DN 8 to DN 65.
The range of nominal diameters for capillary and compression end valves is 6 mm to 110 mm.
The range of pressure designations covered is:
a) for flanged end and wafer type end cast iron bodies:
— PN 2,5; PN 6; PN 10; PN 16; PN 25;
— Class 125; Class 250;
b) for flanged end, wafer type and butt welding end bodies in steel materials:
— 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;
c) for socket welding end and threaded end bodies in steel materials:
— PN 40; PN 63; PN 100;
— Class 600; Class 800.
NOTE 2 Class 800 is a widely used Class designation for socket welding and threaded end check valves.
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SIST EN 16767:2020
EN 16767:2020 (E)
d) for flanged end and wafer type bodies in copper alloy materials:
— PN 2,5; PN 6; PN 10; PN 16; PN 25; PN 40;
— Class 150; Class 300;
e) for threaded end, capillary end and compression end bodies in copper alloy materials:
— PN 16; PN 20; PN 25; PN 32; PN 40;
— Class 125; Class 250.
The correspondence between DN and NPS is given for information in Annex B.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 19:2016, Industrial valves — Marking of metallic valves
EN 558:2017, Industrial valves — Face-to-face and centre-to-face dimensions of metal valves for use in
flanged pipe systems — PN and Class designated valves
EN 736-1:2018, Valves — Terminology — Part 1: Definition of types of valves
EN 736-2:2016, Valves — Terminology — Part 2: Definition of components of valves
EN 736-3:2008, Valves — Terminology — Part 3: Definition of terms
EN 1092-1:2018, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 1: Steel flanges
EN 1092-2:1997, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 2: Cast iron flanges
EN 1092-3:2003, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated – Part 3: Copper alloy flanges
EN 1759-1:2004, Flanges and their joint — Circular flanges for pipes, valves, fittings and accessories, Class
designated — Part 1: Steel flanges, NPS 1/2 to 24
EN 1759-3:2003, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, Class
designated — Part 3: Copper alloy flanges
EN 10269:2013, Steels and nickel alloys for fasteners with specified elevated and/or low temperature
properties
EN 12266-1:2012, Industrial valves — Testing of metallic valves — Part 1: Pressure tests, test procedures
and acceptance criteria — Mandatory requirements
EN 12351:2010, Industrial valves — Protective caps for valves with flanged connections
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SIST EN 16767:2020
EN 16767:2020 (E)
EN 12516-1:2014+A1:2018, Industrial valves — Shell design strength — Part 1: Tabulation method for
steel valve shells
EN 12516-2:2014, Industrial valves — Shell design strength — Part 2: Calculation method for steel valve
shells
EN 12516-4:2014+A1:2018, Industrial valves — Shell design strength — Part 4: Calculation method for
valve shells manufactured in metallic materials other than steel
EN 12627:2017, Industrial valves — Butt welding ends for steel valves
EN 12760:2016, Industrial valves — Socket welding ends for steel valves
EN 12982:2009, Industrial valves — End-to-end and centre-to-end dimensions for butt welding end valves
EN 13547:2013, Industrial valves — Copper alloy ball valves
EN 16722:2015, Industrial valves — End-to-end and centre-to-end dimensions for valves with threaded
ends
EN ISO 228-1:2003, Pipe threads where pressure-tight joints are not made on the threads — Part 1:
Dimensions, tolerances and designation (ISO 228-1:2000)
EN ISO 9606-1:2017, Qualification testing of welders — Fusion welding — Part 1: Steels (ISO 9606-1:2012
including Cor 1:2012 and Cor 2:2013)
EN ISO 14732:2013, Welding personnel — Qualification testing of welding operators and weld setters for
mechanized and automatic welding of metallic materials (ISO 14732:2013)
EN ISO 15607:2019, Specification and qualification of welding procedures for metallic materials — General
rules (ISO 15607:2019)
ISO 4200:1991, Plain end steel tubes, welded and seamless — General tables of dimensions and masses per
unit length
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 736-1, EN 736-2 and EN 736-3
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
Note 1 to entry: EN 736-1 illustrates four basic types of check valves:
— the axial and lift types are based on the globe valve;
— the swing type is based on the butterfly valve and
— the diaphragm type is based on the diaphragm valve.
Other types of check valves are possible and are considered to be within the scope of this document.
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SIST EN 16767:2020
EN 16767:2020 (E)
4 Requirements
4.1 General
For information to be supplied by the purchaser, see Annex A.
4.2 Design
4.2.1 Shell design strength
The minimum body and bonnet wall thickness, the body/bonnet joint and bonnet bolting shall be
determined as follows:
a) for steel check valves designed by the tabulation method, it shall be according to EN 12516-
1:2014+A1:2018;
b) for steel check valves designed by the calculation method, it shall be according to EN 12516-2:2014;
c) for cast iron and copper alloy check valves designed by the calculation method, it shall be according
to EN 12516-4:2014+A1:2018;
d) for PS × DN < 3 000 a validation by an experimental method according to EN 12516-3 is possible,
otherwise the experimental method shall only be applied in addition to the tabulation or calculation
method.
4.2.2 Materials
4.2.2.1 The body and cover (if any) materials shall be selected from EN 12516-1:2014+A1:2018
and/or EN 12516-4:2014+A1:2018. Bolting (if any) materials shall be selected from EN 10269:2013. A
selection of bolts and nuts for flange connections, which may be used for the body and cover connection,
is indicated in EN 1515-4.
4.2.2.2 All copper alloy materials listed in Table A.2 of EN 13547:2013 are also possible.
4.2.2.3 All the internal parts in contact with the fluid shall be made of a material or coated with a
material whose corrosion resistance to the fluid being carried is at least equal to the body and bonnet
material. The manufacturer shall declare the materials of construction and any coatings of components
in contact with the line fluid from which the suitability of the check valve for the application can be
determined.
4.2.3 Pressure/temperature ratings
4.2.3.1 Steel body
The pressure/temperature ratings shall be as specified in EN 12516-1:2014+A1:2018 for the particular
body material group.
The pressure/temperature ratings applicable to Class 800 socket welding and threaded end check valves
shall be the Class 600 rating for the applicable material group multiplied by the ratio of 800/600.
4.2.3.2 Cas
...