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International Standard for Foundry Protective Clothing

 

 

The international standard most commonly used around the world for protective clothing for furnace operators is ISO 11612 Protective clothing - Clothing to protect against heat and flame.

 

This International Standard specifies performance requirements for protective clothing made from materials, which are designed to protect the wearer's body, except the hands, from heat and/or flame. For protection of the wearer's head and feet, the only items of protective clothing falling within the scope of this International Standard are gaiters, leggings, hoods, and overboots. However, concerning hoods, requirements for visors and respiratory equipment are not given.

 

The performance requirements set out in this International Standard are applicable to protective clothing which could be worn for a wide range of end uses, where there is a need for clothing with limited flame spread properties and where the user can be exposed to radiant, convective, contact heat and/or to molten metal splashes.

 

 

ISO 11612:2015

 

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

This Standard defines the minimum requirements for clothing for protection against heat and  flames:

   •   Clothing must be supplied with user information from the manufacturer. 
   •   Code A must be complied with. 
   •   At least one of the heat transmission performance codes B-F must be met.

 

 

CODE TEST METHOD PROTECTION AGAINST PERFORMANCE LEVEL
MINIMUM
REQUIREMENT
A
ISO 15025 Procedure A ISO
15025 Procedure B
Limited Flame Spread – Face Ignition
Limited Flame Spread – Edge Ignition
A1 OR (A1 AND A2)
Pass
B ISO 9151 Convective Heat B1 to B3 B1
C ISO 6942 Radiant Heat C1 to C4 C1
D ISO 9185
Molten Aluminium Splash
D1 to D3 D1
E ISO 9185 Molten Iron Splash E1 to E3 E1
F
ISO 12127-1
Contact Heat F1 to F3 F1

 

 

Physical requirements including Tensile Strength, Tear Strength, and Seam strength must also be tested independently.

 

 

 

CODE A. Flame propagation (ISO 15025 method A)

Sample is exposed to flame for 10 seconds then removed

   

Performance level

X

A1

A2

Average value of flame persistence < 2 s

Average value of residal incandescence < 2 s

Test

not passed

Test

PASSED

Test

PASSED

 

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CODE B. Convective heat (ISO 9151)

Temperature increase behind sample is measured


Performance Level

 

B1

B2

B3

Heat Transmission Index - HTI (seconds)

Min

4

10

20

 

Max

<10

<20

 
 

HTI = Average of HTI12 and HTI2                                   HTI12 = Time to increase temperature by 12℃

HTI24= Time to increase temperature by 24℃

 

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CODE C. Radiant heat (ISO 6942 method B)

Temperature increase behind sample is measured

 

Performance level

 

C1

C2

C3

C4

Heat transfer t24 (seconds)

min

7

20

50

95

 

min

<20

<50

<95

 
 
T24 = Time to increase temperature by 24℃
 
 
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CODE D. Splashes of molten aluminum (ISO 9185)

Quantity necessary to damage PVC film is measured

 

 

Performance Level

 

D1

D2

D3

Molten metal weight (grams)

Min

100

200

350

 

Max

<200

<350

 

Molten Aluminum at 780℃ (+/- 20℃) (1436℉) PVC film simulates human skin

 

 

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CODE E. Splashes of molten cast-iron (ISO 9185)

Quantity necessary to damage PVC film is measured

 

Performance Level

 

E1

E2

E3

Molten metal weight (grams)

Min

60

120

200

 

Max

<120

<200

 

 

Molten Cast-Iron at 1400℃ (+/- 20℃) (2552℉)PVC film simulates human skin

 

 
_______________________________________________________________________________________________
 
 

CODE F. Contact heat (ISO 12127)

Heat transmission is measured


Performance Level

 

F1

F2

F3

Threshold time (seconds)

Min

5

10

15

 

Max

<10

<15

 

Threshold time = time necessary to increase temperature by 10℃

 

 

Foundry Protection Clothing - References