SIST EN 12320:2022

SLOVENSKI STANDARD
SIST EN 12320:2022
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
SIST EN 12320:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 12320:2022

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SIST EN 12320:2022


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.

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SIST EN 12320:2022
EN 12320:2021 (E)
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

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SIST EN 12320:2022
EN 12320:2021 (E)
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.
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SIST EN 12320:2022
EN 12320:2021 (E)
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
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SIST EN 12320:2022
EN 12320:2021 (E)
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)
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SIST EN 12320:2022
EN 12320:2021 (E)
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.
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SIST EN 12320:2022
EN 12320:2021 (E)
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 number of steps on the same level shall be 60 %, maximum two
adjacent and a minimum of three levels.
4.5.3 Non-interpassing of keys with just one interval effective differ
When tested in accordance with 5.5.3, it shall not be possible to operate the padlock with keys differing
from the correct key by one interval, i.e. the next closest key. The next closest key shall be defined by the
manufacturer according to its key coding system.
4.5.4 Resistance to force on cylinder plug or locking mechanism
When tested in accordance with 5.5.4, the cylinder plug or the locking mechanism shall resist a force F1
(Table 2).
4.5.5 Resistance to torque on cylinder plug or locking mechanism
When tested in accordance with 5.5.5, the cylinder plug or the locking mechanism shall resist a torque
M2 (Table 2).
4.5.6 Resistance to pulling of shackle or staple
When tested in accordance with 5.5.6, the shackle and the staple shall each resist a force F2 (Table 2).
4.5.7 Resistance to twisting of shackle or staple
When tested in accordance with 5.5.7, the shackle and the staple shall each resist a torque M3 (Table 2).
4.5.8 Resistance to cutting of shackle or staple
When tested in accordance with 5.5.8, the shackle and the staple shall each resist a force F3 (Table 2).
4.5.9 Resistance to impact on padlock body, shackle and staple at low temperature
When tested in accordance with 5.5.9, the padlock body, the shackle and the staple cooled to temperature
T, shall each resist the blows from the steel pole with the mass m and from the height h (Table 2).
4.5.10 Resistance to drilling of padlock body, shackle and staple
When tested in accordance with 5.5.10, the padlock body, the shackle and the staple shall each resist
drilling for a time t (Table 2).
4.5.11 Resistance to sawing of padlock body, shackle and staple
When tested in accordance with 5.5.11, the padlock body, the shackle and the staple shall each resist
sawing for a time t (Table 2).
4.5.12 Manual attack resistance
When tested in accordance with 5.5.12, the padlock shall resist attacks with manual tools for a time t (see
Table 2).
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SIST EN 12320:2022
EN 12320:2021 (E)
Table 2 — Security requirements
Requirement Requirement Test Test Grade Unit
clause method parameter
number clause
1 2 3 4 5 6
number
4.5.1.2 Key retained in open 5.5.1 yes/no - - - yes yes yes
position
4.5.2 Minimum number of 5.5.2 n 300 1 000 2 500 5 000 10 20 -
effective key differs 000 000
4.5.3 Non-interpassing of 5.5.3 M1 1 1 1,5 1,5 1,5 1,5 Nm
keys with just one
interval differ -
Torque on key
4.5.4 Resistance to force 5.5.4 F1 - - 4 5 10 15 kN
on cylinder plug or
locking mechanism
4.5.5 Resistance to torque 5.5.5 M2 - 2,5 5 15 20 30 Nm
on cylinder plug or
locking mechanism
4.5.6 Resistance to pulling 5.5.6 F2 3 5 15 30 70 100 kN
of shackle or staple
4.5.7 Resistance to 5.5.7 M3 40 100 200 600 1 200 2 500 Nm
twisting of shackle

or staple
4.5.8 Resistance to cutting 5.5.8 F3 6 15 25 45 70 100 kN
of shackle or staple

4.5.9 Resistance to impact 5.5.9 T - - - 20 - 20 - 40 - 40 °C
on padlock body,
m - - 1 250 3 050 6 550 7 150 g
shackle and staple at
h - - 800 1 000 1 400 1 500 mm
low temperature
4.5.10 Resistance to drilling 5.5.10 t - - - 2 4 8 min
of padlock body,
shackle and staple
4.5.11 Resistance to sawing 5.5.11 t - - - 2 4 8 min
of padlock body,
shackle and staple
4.5.12 Manual attack 5.5.12 t - - - 3 5 10 min
resistance
toolsets
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SIST EN 12320:2022
EN 12320:2021 (E)
5 Test methods
5.1 General
The manufacturer will provide assembly and component drawings to enable the tester to carry out a
preliminary product assessment prior to testing.
The padlock shall be tested in the locked position with the key removed.
It is not necessary for the correct key to operate the padlock after testing.
Padlocks/padlock fittings and their original keys shall be taken at random and submitted for each test.
In the event of one of the original two samples failing the test, the padlocks/padlock fittings shall be
deemed to have failed and a further two shall be tested, both of which shall pass the test.
If the parts to be tested are inaccessible when the product is correctly mounted in accordance with the
manufacturer's instructions, the product shall be considered to have passed that test.
A padlock shall be deemed to have been opened when a bar, of equal cross-section to that of its shackle,
can be released. Ability to open can be checked at any time during the test by manipulation with a
screwdriver or similar implement (maximum length 200 mm) for a period of 5 s max.
5.1.1 Tolerances
Unless otherwise stated, the following tolerances shall apply:
— force ±2 %;
— torque ±2 %;
— mass/weight ±2 %;
— distance ±2 %;
— time ±5 s;
— temperature ±2 °C.
Unless otherwise stated, the forces shall be applied progressively and without shock to the required load
within 1 min.
5.1.2 Test environment
The ambient temperature of the test environment shall be controlled throughout the test from 15 °C to
30 °C unless otherwise stated.
5.1.3 Test tools
Specification of steel for cutting and impact tests as required in 5.5.8.1 and 5.5.9 shall be structural steel
E335 defined in EN 10025-2:2019, heat treated to have a hardness of 60 HRC to 64 HRC.
5.1.4 Sampling
Test sampling and sequencing shall be in accordance with Annex A.
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SIST EN 12320:2022
EN 12320:2021 (E)
5.2 Category of use
5.2.1 Operational unlocking test
Mount the padlock in a suitable holding fixture and apply a torque to a fully inserted correct key using a
torquemeter, as shown in Figure B.1. At no point between locked and unlocked shall the torque exceed
1 Nm.
5.2.2 Key strength
Requirements for key strength shall meet the requirements of EN 1303:2015, 5.2.
5.3 Durability
The durability test shall be carried out using suitable apparatus that allows the full operational locking
and unlocking sequence of the padlock to include the release of the shackle. (It is not necessary for the
shackle to be turned). Repeat the sequence at a speed of five to twenty cycles per minute
During the operational cycle the key may remain partially inserted in the locking mechanism but shall
have cleared all movable detainers.
The key used for the durability test can be cleaned and the padlock shall be lubricated in accordance with
the manufacturer’s instructions at the start of the test and after each 5000 cycles using the lubricant
recommended by the manufacturer.
After completing the required number of cycles, the operation of the padlock shall be tested using a new
original key. The rotation shall be achieved with a maximum torque of 1,5 Nm.
If the padlock should jam and cease to operate during the test, then provided the padlock continues to
operate in the proper manner when released, the test shall be allowed to continue.
No durability requirements for padlock fittings.
5.4 Corrosion resistance
5.4.1 Preparation
The padlock is locked on a plastic bar and placed in the chamber for salt spray test. The padlock without
a key is oriented in the manner that it would assume to be in use.
Padlock shall be exposed to a neutral salt spray test in accordance with EN 1670:2007.
— 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 .
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SIST EN 12320:2022
EN 12320:2021 (E)
5.4.2 Test of padlock function after salt spray exposure
The evaluation shall be made in accordance with EN 1670:2007, 5.3 only.
Test of function shall start within 5 min after the salt spray exposure is ended.
Insert the correct new key manually and try to operate the padlock locking mechanism to the open
position. A maximum torque of 2,5 Nm is permitted. The key may be inserted, and rotation attempted
several times within 2 min. If the padlock locking mechanism is opened but the shackle is not released, a
maximum force of 250 N shall be applied to the shackle in the normal shackle opening direction. This
shall be repeated until the shackle opens or when the maximum time of the test is used.
The maximum time allowed for this test, starting from trying to insert the key, is 5 min.
If the padlock is not opened in this first attempt, it shall be cleaned with fresh 20 °C ± 10 °C running water
for maximum 5 min, and then cleaned with compressed air for 10 s.
Directly after cleaning, a second attempt to try to operate the padlock to open position, using the above
method, should be made. If the padlock does not open after the second attempt the padlock is deemed to
have failed the test.
5.5 Security
5.5.1 General
Check that in the 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.
5.5.2 Minimum number of effective key differs
Check in accordance with 4.5.2 based on manufacturer’s information.
The manufacturer shall provide information stating how the required number of effective key differs is
achieved.
5.5.3 Non-interpassing of keys with just one interval effective differ
A torque of M1 (Table 2) shall be applied to the bow of a fully inserted key selected by the test laboratory
from the manufacturer’s key coding system, which shall differ from the correct key by one effective differ.
One key differing up and one key differing down shall be tested manually by using the specified torque.
5.5.4 Resistance to force on cylinder plug or locking mechanism (Requirement in 4.5.4)
This test shall only be applicable to padlocks in attack resistance grades 3, 4, 5 and 6 (Table 2).
The padlock shall be mounted in the test rig as shown in Figure B2.
A self-cutting traction screw to EN ISO 10666, EN ISO 15480 to EN ISO 15483, of a maximum diameter of
5,5 mm shall be screwed into the plug/cylinder and an attempt made to withdraw the plug/cylinder by
means of the appropriate maximum force specified in 4.5.4 applied progressively without shock within
the time allowed.
Net time for the test is 5 min. The time starts when the screw touches the cylinder and ends when the
maximum time is achieved. The time is stopped for attaching the pulling adapter, moving the test
specimen between the place of attaching the screw and the pulling machine, and restarts when the pulling
starts.
If the design of the padlock does not enable the force to be applied, then it is deemed to have passed the
test.
The washer or fixing tool for the pulling machine shall be designed in such a way that it can be used
without unscrewing the screw.
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SIST EN 12320:2022
EN 12320:2021 (E)
It is not allowed to drill or widen the diameter of the hole in order to place a screw with a bigger diameter
than is possible to attach in the first attempt. The load shall be applied without removing and re-inserting
the screw.
The pulling test is conducted with one screw only at the same time.
It is not allowed to lubricate the screw or the plug during the attempt to attach the screw.
On a screw which is attached into the plug a pulling test shall be performed. The pulling test shall continue
until either:
— The value in Table 2 for the grade has been reached; or
— The whole cylinder or plug is removed; or
— The screw breaks; or
— The screw is completely withdrawn from the plug;
— The screw cannot be inserted or does not grip in the plug.
More than one pulling test is allowed on the same cylinder with different screw diameters within the
required time for the test.
The time restarts when the pulling force starts to pull. The time will be stopped when the screw is out of
the cylinder. If a second attempt with an additional screw will be made, the time shall restart when
screwing in the additional screw.
The screw shall be applied axial (tolerance ± 5°) to the rotation of the cylinder plug.
The maximum screwing torque is 12 Nm.
The required pulling force shall linearly increase from 0 kN up to the force which is stated for the chosen
grade in Table 2 within a period of 30 s ± 5 s. The maximum force shall be held for 5 seconds.
After the test in accordance with 5.5.3 the padlock should not open manually with a torque applied of
maximum 5 Nm.
5.5.5 Resistance to torque on cylinder plug or locking mechanism (Requirement in 4.5.5)
Mount the padlock in a suitable holding fixture and apply a torque M2 (Table 2) by means of an
appropriate tool (test tools 5.1.3) inserted into the keyway as shown in Figure B.1. The tool used shall be
attempted to be inserted into the keyway with a maximum of five blows with a 300 g hammer. The torque
shall be applied once in alternate directions.
If the torque test required cannot be applied, the padlock shall be deemed to have passed the test.
5.5.6 Resistance to pulling of shackle or staple (Requirements in 4.5.6)
Mount the padlock or staple in test-rigs as shown in Figure B.3 adapted to the form of the device under
test, and apply a pull force F2 (Table 2) to the shackle/staple by means of a circular drawing bar with a
diameter equal to maximum 80 % of the horizontal shackle clearance, or maximum 80 % of the internal
diameter, or horizontal clearance of the staple.
5.5.7 Resistance to twisting of shackle or staple (Requirements in 4.5.7)
Mount the padlock or staple in test-rigs as shown in Figure B.4 adapted to the form of the device under
test, and apply a torque M3 (Table 2) to the shackle/staple by means of a loading device which makes
contact at points corresponding to half the internal height of the shackle/staple limited to 25 mm
maximum.
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SIST EN 12320:2022
EN 12320:2021 (E)
Support the padlock body similarly at half its height.
5.5.8 Resistance to cutting of shackle or staple (Requirements in 4.5.8)
5.5.8.1 General
Where there is sufficient access, as indicated by the accessibility checks below, subject the shackle or the
staple to a cutting force of F3 (Table 2) applied by means of special jaws as shown in Figure B.5. Where
restricted access is indicated, the same test shall be carried out, with the force F3, reduced to that of a
lower grade, as determined by the accessibility check. If there is less than a 7 mm of shackle/staple
exposed during the accessibility check, the component is considered to have passed the cutting test, and
no further assessment is necessary.
5.5.8.2 Shackle accessibility check
a) Mount the padlock on the standard staple shown in Figure B.6 unless it is designed for use only with
its own special fitting, in which case, use that instead.
b) Determine
...