EN 12320:2021

SLOVENSKI STANDARD
01-februar-2022
Nadomešča:
SIST EN 12320:2013
Stavbno okovje - Obešanke in dodatki za obešanke - Zahteve in preskusne metode
Building hardware - Padlocks and padlock fittings - Requirements and test methods
Baubeschläge - Hangschlösser und Hangschlossbeschläge - Anforderungen und
Prüfverfahren
Quincaillerie pour le bâtiment - Cadenas et porte-cadenas - Prescriptions et méthodes
d'essai
Ta slovenski standard je istoveten z: EN 12320:2021
ICS:
91.190 Stavbna oprema Building accessories
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 12320
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2021
EUROPÄISCHE NORM
ICS 91.190 Supersedes EN 12320:2012
English Version
Building hardware - Padlocks and padlock fittings -
Requirements and test methods
Quincaillerie pour le bâtiment - Cadenas et porte- Baubeschläge - Hangschlösser und
cadenas - Prescriptions et méthodes d'essai Hangschlossbeschläge - Anforderungen und
Prüfverfahren
This European Standard was approved by CEN on 21 September 2021.

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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12320:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms, definitions and symbols . 4
3.1 Definitions . 4
3.2 Symbols . 5
4 Requirements . 6
4.1 General . 6
4.2 Category of use (first classification digit) . 6
4.3 Durability (second classification digit) . 6
4.4 Corrosion resistance (third classification digit) . 6
4.5 Security (fourth classification digit) . 6
5 Test methods . 9
5.1 General . 9
5.2 Category of use . 10
5.3 Durability . 10
5.4 Corrosion resistance . 10
5.5 Security . 11
6 Classification . 16
6.2 Durability (second digit) . 16
6.3 Corrosion resistance (third digit) . 16
6.4 Security (fourth digit) . 16
7 Marking . 17
Annex A (normative) Sampling and sequencing - Tests on alternative design padlocks . 18
Annex B (normative) Test rig illustrations . 19
Annex C (informative) Manufacturer’s declaration of compliance . 27
Bibliography . 29

European foreword
This document (EN 12320:2021) has been prepared by Technical Committee CEN/TC 33 “Doors,
windows, shutters, building hardware and curtain walling”, 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 June 2022, and conflicting national standards shall be
withdrawn at the latest by June 2022.
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 12320:2012.
This document is one of a series of European Standards dedicated to building hardware products.
Annexes A and B are normative.
In comparison with the previous edition, the following significant technical modifications have been
made:
— Annex C, Manufacturer’s declaration of compliance.
Test methods are specified in detail to ensure reproducibility at any testing establishment within Europe,
and acceptance criteria are defined objectively to ensure consistency of assessment.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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.
1 Scope
This document applies to mechanical padlocks and padlock fittings used on buildings and general use and
specifies the test methods to be used.
This document specifies performance and other requirements for strength, security, durability,
performance, and corrosion resistance of padlocks. It establishes one category of use, two categories of
durability, six categories for corrosion resistance and six grades for security based on performance tests
that simulate attack.
Limited manual attack testing is included in this document because the machine testing does not replicate
all known manual attacks.
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 1670:2007, Building hardware - Corrosion resistance - Requirements and test methods
EN 10025-2:2019, Hot rolled products of structural steels - Part 2: Technical delivery conditions for non-
alloy structural steels
EN 1303:2015, Building hardware - Cylinders for locks - Requirements and test methods
EN ISO 10666, Drilling screws with tapping screw thread - Mechanical and functional properties
(ISO 10666)
EN ISO 15480, Fasteners - Hexagon washer head drilling screws with tapping screw thread (ISO 15480)
EN ISO 15481, Cross recessed pan head drilling screws with tapping screw thread (ISO 15481)
EN ISO 15482, Cross recessed countersunk head drilling screws with tapping screw thread (ISO 15482)
EN ISO 15483, Cross recessed raised countersunk head drilling screws with tapping screw thread
(ISO 15483)
3 Terms, definitions and symbols
3.1 Definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1.1
cam
part of the key and cylinder mechanism which operates the locking mechanism
3.1.2
effective key differ
difference between key mechanism of similar design, achieved only by the movable detainer, which
allows each key mechanism to be operated only by its own key
Note 1 to entry: The number of effective differs is equal to the number of theoretical differs after deduction of the
differs suppressed by the manufacturer due to technical constraints and those differs suppressed in accordance
with the restraints of 4.5.1.
3.1.3
hasp
part of the padlock fitting which goes over the staple
3.1.4
key mechanism
part of the mechanism which recognises a correct key
3.1.5
locking mechanism
part of the mechanism which is operated by the key mechanism to lock/unlock the padlock
3.1.6
padlock
independent locking device comprising a body, a key mechanism, a locking mechanism and a shackle
3.1.7
padlock fitting
device fitted to the object which is to be locked with a padlock excluding cables and chains
3.1.8
shackle
part of the padlock which passes through and secures the padlock fitting
3.1.9
staple
part of the padlock fitting through which the padlock shackle is passed
3.2 Symbols
For the purposes of this document, the symbols described in Table 1 apply.
Table 1
Symbol Unit Definition
d mm Diameter of shackle
F1 kN Push/pull force on cylinder plug/locking mechanism
F2 kN Pull force on shackle or staple
F3 kN Cutting force on shackle or staple
F4 kN Maximum possible push/pull force on cylinder plug/locking
mechanism
h mm Height through which weight is dropped (impact test)
Symbol Unit Definition
M1 Nm Torque on key to test for interpassing
M2 Nm Torque on cylinder plug/locking mechanism
M3 Nm Twisting torque on shackle or staple
n  Minimum number of effective key differs
t min Drilling/sawing resistance time
T °C Temperature of product for impact testing
m g Drop mass for impact test
4 Requirements
4.1 General
The structure of this clause reflects the classification as given in Clause 6.
4.2 Category of use (first classification digit)
Grade 1: according to requirements in 5.2.
4.3 Durability (second classification digit)
Grade 0: no requirements
Grade 1: 10 000 cycles
When tested in accordance with 5.3, it shall be possible to operate the padlock.
The padlock fittings are excluded from the durability test.
4.4 Corrosion resistance (third classification digit)
Products shall be classified in accordance with EN 1670.
— Grade 0: no defined corrosion resistance
+1h/-0 h
— Grade 1: 24h ;
+1h/-0 h
— Grade 2: 48h ;
+1h/-0 h
— Grade 3: 96h ;
+1h/-0 h
— Grade 4: 240h ;
+1h/-0 h
— Grade 5: 480h .
When tested in accordance with 5.4, it shall be possible to operate the padlock.
This corrosion test shall apply to the functionality only (not appearance).
4.5 Security (fourth classification digit)
4.5.1 General
4.5.1.1 Some of the requirements can be confirmed with a certificate and test report according to
EN 1303.
4.5.1.2 In grades 4, 5 and 6 it shall not be possible to remove the key until the shackle is deadlocked in
the closed position, key retained in open position.
4.5.2 Minimum number of effective key differs
Padlocks shall have a minimum of n effective key differs (Table 2).
For a mechanical padlock the maximum numb
...