EN11612 standard

EN ISO 11612:2008- Protective clothing – Clothing to protect against heat and flame

Code A1: Flame spread – face ignition

Code A2 Flame spread – edge ignition

Code B: Convective heat

Performance levelsRange of HTI 24 values (Unit: second)

Note: HTI=Heat transfer index

Code C: Radiant heat

Performance levelsHeat transfer factor RHTI 24 values (Unit: second)

Note: RHTI=Radiant heat transfer index

Code D: Molten aluminium splash

Performance levelsMolten aluminium splash (Unit: gram)

Code E: Molten iron splash

Performance levelsMolten iron splash (Unit: gram)

Code F: Contact heat

Performance levelsThreshold time (Unit: second)


EN11611 standard

EN ISO 11611: 2007- Protective clothing for use in welding and allied processes

Code A1: surface ignition

Code A2: edge ignition

Impact of spatter

Performance levelsDrops before raising 40K behind the material
Class 1>15 drops
Class 2>25 drops

Radiant heat

Performance levelsHTI 24 values (Unit: second)
Class 1>7 seconds
Class 2>16 seconds


EN14116 standard

EN ISO 14116: 2008- protective clothing – Limited flame spread materials

 FlamingFlaming DebrisAfterglowHole
Index 1××not spreadno to edge
Index 2××not spreadno formation
Index 3××≤2sno formation

Note: Index 1 materials shall not be worn next to the skin.


EN1149 standard

EN 1149-5:2008 Performance Requirements

Antistatic PPE is certified to EN1149-5 as this standard covers the performance requirements of the garments and refers to the choice of 2 different test methods (EN1149-1 or EN1149-3).

EN 1149-1:2006 Measurements of Surface Resistivity

This test method is most appropriate for materials for which the electrostatic dissipative behaviour is based on surface conductivity (for instance containing surface conductive yarns or a homogeneous conductive outside PVC coating layer). This method is not appropriate for core conductive fibres.

EN 1149-3:2004 Measurements of Surface Resistivity

This test method is referenced for materials for which the electrostatic dissipative behaviour is based on core conducting fibres but can also be used for surface conducting materials.

In the EN1149 series, there is also an EN1149-2 (measurement of the electrical resistance through a material; the vertical resistance) which is used as a test method in EN ISO 11611 (welders clothing) and which is also mentioned in Annex H of EN 469:2005. A further part of EN1149 is under development which will cover the testing of the fully garment – this part of the standard is EN1149-4.

Area RequirementClass 1Class 2Class 3
Fluorescent material0.140.500.80
Reflective material0.100.130.20
Combined material0.20

Note: Unit: square meters



EN ISO 20471: 2013 High visibility clothing – Test methods and requirements

Area RequirementClass 1Class 2Class 3
Fluorescent material0.140.500.80
Reflective material0.100.130.20
Combined material0.20

Note: Unit: square meters

ANSI 107

ANSI 107

ANSI is short for American National Standards Institute, who established the standard of high-visibility safety garments for construction, maintenance, utility, emergency responders, airport ramp personnel and other workers are routinely exposed to the hazard of low visibility at work. The standard specifies the following:

  • Design
  • Requirements for background and combined-performance retro-reflective materials
  • Photo metric and physical performance requirements for retro-reflective materials
  • Care Labeling


NFPA 2112

Refers to NFPA’s “Standard on Flame Resistant Garments for Protection of Industrial Personnel Against Flash Fire.” A flash fire is spontaneous, reaching very high temperatures although short in duration. NFPA 2112 defines the testing methods and performance requirements for flame-resistant fabrics. WOKI® Aramid IIIA products are all NFPA 2112 certified.

ASTM F1506

ASTM F1506

Standard Performance Specification for Flame Resistant and Arc Rated Textile Materials for Wearing Apparel for Use by Electrical Workers Exposed to Momentary Electric Arc and Related Thermal Hazards. WOKI® FR Fleece products are all ASTM F1506 certified.



Modacrylic is an inherently flame resistant fiber, no melt & no drip. It is used mainly to blend with other FR fibers, natural fibers or cellulose fibers. FR garments made from modacrylic blend fabric have softer feeling compared with other FR fabrics, such as FR cotton or Aramid IIIA, so it’s ideal for knitwear, baselayer.

Aramid IIIA

Aramid IIIA

Generally it is considered as the equivalent of Nomex® IIIA. as they have same composition of 93% meta-aramid, 5% para-aramid, 2% anti-static.

We also offer flame resistant clothing made from fabric using the fiber provided by Dupont® China.

FR Knits

FR Knits

WOKI® FR Knits product is a range of inherently flame resistant knitted fabric with FR modacrylic fiber blend with cotton fiber, cellulose fiber, aramid fiber. It offers FR Jersey/Pique/Interlock with breathability & moisture, FR Fleece with thermal & wind-proof.

Arc Flash

Arc Flash

According to the Natinal Fire Protection Association (NFPA), Arc Flash is an electric current that passes through air when insulation or isolation between electrified conductors is no longer sufficient to withstand the applied voltage.

An Arc Flash accident can cause minor injuries, third degree burns and potential death as well as other injuries including blindness, hearing loss, nerve damage and cardiac arrest.

HRC Category

The result of the arc flash study will categorize the hazard at specific equipment based on the incident energy, as well as identify the Arc Flash Protection Boundary.

Hazard Risk CategoryClothingCal/cm²
0Non-melting, flammable materials(I.e., untreated cotton, wool, rayon, or silk, or blends of these materials) with a fabric weight of at least 4.5 oz/yd²N/A
1FR shirt and FR pants of FR Coverall4
2Cotton underwear – conventional short sleeve and brief / shorts, plus FR shirt and FR pants8
3Cotton underwear plus FR shirt and FR pants plus FR coverall, or cotton underwear plus two FR coveralls25
4Cotton underwear plus FR shirt and FR pants plus multilayer flash suit40
Extreme DangerNo PPE Available>40

Flash Fire

Flash Fire

A flash fire is a quick-moving, intense fire caused by ignition of  flammable materials such as dust, gas, or the vapors of an ignitable liquid, without the production of damaging pressure.

Flame Retardant

Flame Retardant

Flame Retardant fabric are chemically treated to be slow burning or self-extinguishing when exposed to an open flame. These fabrics are commonly made from Cotton, Rayon, Polyester, Nylon/Cotton, finished by FR additives.

Flame Resistant

Flame Resistant

Flame Resistant fabrics are made from materials that are inherently non-flammable. Fabrics made with these types of materials are designed to prevent the spread of flame and no melt & no drip when burning. We can’t say these fabric will not burn, but they will burn slowly and self-extinguish eventually.

Inherently FR

Inherent FR

Inherently Flame Resistant (IFR) fabrics are made of fibers manufactured with FR additives, its FR property is permanent, and it can never be worn away or washed out.

Treated FR

Treated FR

Fabrics have been treated with non-permanent FR chemicals. Protective clothing made with these type of fabrics have limited washing cycles, FR properties will fade gradually. WOKI® treated FR products can keep its FR performance after 100 and more times washing