UNI EN ISO 11612:2015 - EUROPEAN STANDARD

 

Protective clothing against heat and flames.

The standard specifies the performance requirements for clothing made from flexible materials that are designed to protect the wearer's body, excluding the hands, against heat or flames. For the protection of the head and feet, the only protective garments that fall within the scope and field of the standard are gaiters, hoods and boot covers. However, with regards to hoods, no requirements are provided for visors and respirators. Among the numerous dangers listed in this standard, there are three levels of performance: Level 1 which indicates a low risk exposure; Level 2 that shows a medium risk exposure; Level 3 which demonstrates a high risk exposure.

NOTE (x) = level of protection obtained

A1 or A1+A2, B(x), C (x), D (x), E (x), F (x),

Requirement for limited flame spread - ISO 15025 Procedure A (code A1)

Properties

Requirements

Flame spread

No specimen shall allow any part of the lower limit of a flame or the limit of any hole to reach the upper or vertical edge.

Flaming waste

No specimen should generate inflamed residues

Hole formation

No specimen should have holes greater than or equal to 5 mm in any direction, except for an intermediate coating used for specific protection other than heat and flame protection.

Residual glow

No afterglow> 2s,

According to ISO 15025 after the cessation of the flames, the residual incandescence must not spread from the charred area to the intact one.

Residual flame

The residual flame must be ≤ 2 s.

 

Requirement for limited flame spread - ISO 15025 Procedure A (code A2)

Properties

Requirements

Flame spread

No specimen shall allow any part of the lower limit of a flame or the limit of any hole to reach the upper or vertical edge.

Flaming waste

No specimen should generate inflamed residues

Residual glow

No afterglow> 2s,

According to ISO 15025 after the cessation of the flames, the residual incandescence must not spread from the charred area to the intact one.

Residual flame

The residual flame must be ≤ 2 s.

 

Performance Level: Convective Heat Test

Level capability

Value range RHTIa 24

Min.

Max.

B1

4,0

<10,0

B2

10,0

<20,0

B3

20,0

 

Heat transfer index as defined in ISO 9151.

 

Performance Level: Radiant Heat Test

Level capability

Transfer factor RHTIa 24

Min.

Max.

C1

7,0

<20,0

C2

20,0

<50,0

C3

50,0

<95,0

C4

95,0

 

  Radiant heat transfer index as defined in ISO 6942.

 

Performance Level: Molten Aluminum Splash

Level capability

Molten aluminum splash

Min.

Max.

D1

100

<200

D2

200

<350

D3

350

 

 

Performance Level: Molten Iron Splash

Level capability

Splashes of molten iron

Min.

Max.

E1

60

<120

E2

120

<200

E3

200

 

 

Performance Level: Contact Heat

Level capability

Threshold time. s.

Min.

Max.

F1

5,0

<10,0

F2

10,0

<15,0

F3

15,0