Building hardware - cylinders for locks
UNION products applicable: DTEC cylinders
GUIDE TO CLASSIFICATION
BS EN 1303 classifies cylinders using an 8 digit coding system.
Each digit refers to a particular feature of the product measured against the standard's performance requirements.
Digit 1 - Category of use
- grade 1: for use by people with a high incentive to exercise care and with a small chance of misuse
Digit 2 - Durability
- grade 4: 25 000 cycles.
- grade 5: 50 000 cycles.
- grade 6: 100 000 cycles.
Digit 3 - Door mass
- grade 0: No requirement.
Digit 4 - Fire resistance
- grade 0: not approved for use on fire/smoke resisting door assemblies
- grade 1: suitable for use on fire/smoke resisting assemblies, subject to satisfactory assessment
Digit 5 - Safety
- grade 0: no requirement.
Digit 6 - Corrosion resistance
- grade 0: No requirement.
- grade A: high corrosion resistance; no temperature requirement
- grade B: no corrosion requirement; temperature requirement from -20°C to +80°C
- grade C: high corrosion resistance; temperature requirement from -20°C to +80°C
Digit 7 - Key related security
Six grades of key related security in accordance with the table below:
| |
Grade
|
| |
1
|
2
|
3
|
4
|
5
|
6
|
|
Minimum number of effective differs
|
100
|
300
|
15000
|
30000
|
30000
|
100000
|
|
Minimum number of movable levers, pins, discs, etc
|
2
|
3
|
5
|
5
|
6
|
6
|
|
Coding on key could disclose combination
|
Yes
|
Yes
|
No
|
No
|
No
|
No
|
|
Torque resistance of plug
|
2.5Nm
|
5Nm
|
15Nm
|
15Nm
|
15Nm
|
15Nm
|
Digit 8 - Attack resistance
Three grades are identified and the principal requirements are summarised in the table below:
| |
Grade
|
| |
0
|
1
|
2
|
|
Resistance to drilling (nett drilling time)
|
–
|
3 mins
|
5 mins
|
|
Resistance to chisel attack (number of blows)
|
–
|
30
|
40
|
|
Resistance to twisting attack (number of defined twists)
|
–
|
20
|
30
|
|
Resistance to plug/cylinder extraction (pull load)
|
–
|
15 kN
|
15 kN
|
|
Torque resistance of plug/cylinder
|
–
|
20 Nm
|
30 Nm
|
EXAMPLE
The following marking denotes a cylinder meeting the required category of use Grade 1, durability Grade 6 (100 000 cycles), no requirement for door mass, no fire resistance or safety in use requirement, having Grade A corrosion resistance, Grade 4 key related security and Grade 1 attack resistance.