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Laboratory Verification & Testing Methods

How Flame & Thermal Protection Tests Are Run

Watch authentic laboratory video demonstrations for our primary protective textile standards. Each video illustrates the apparatus, flame and thermal exposure method, and how pass/fail ratings and performance values are measured on our technical yarns and fabrics.

Jump to test method:
▶ ASTM D6413 / D6413M ▶ EN ISO 11612 ▶ ASTM F1930 / NFPA 2112 ▶ ASTM F1959 / F1959M
ASTM D6413 / D6413M North American Benchmark

Vertical Flame Resistance Test (Textiles)

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ASTM D6413 is the foundational vertical flammability test referenced across major North American industrial workwear standards (including ASTM F1506 and NFPA 2112). A conditioned textile specimen is suspended vertically inside a specialized draft-free cabinet, and a standardized methane flame is applied to the lower edge for exactly 12 seconds.

Key Test Parameters & Verification Metrics

Apparatus
Draft-free vertical test cabinet with calibrated methane burner
Exposure
12-second direct flame contact to bottom edge
Core Criteria
Afterflame time (seconds), afterglow time, char length (mm/in)
Typical Pass
Afterflame ≤ 2.0 s; average char length ≤ 100 mm (4.0 inches); zero melt/drip
Key Applications
Industrial FR workwear shells, aramid woven fabrics, modacrylic blends
EN ISO 11612 European Garment Standard

Flame Spread & Heat Exposure Testing

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EN ISO 11612 is the international performance benchmark for protective clothing against heat and flame. The testing protocol evaluates limited flame spread (ISO 15025 Code A1 surface ignition and Code A2 edge ignition) to ensure zero hole formation, no flaming to edges, and no melting or dripping, alongside convective and radiant heat transfer resistance.

Key Test Parameters & Verification Metrics

Test Methods
ISO 15025 (Flame spread), ISO 9151 (Convective heat), ISO 6942 (Radiant heat)
Flame Exposure
10-second horizontal and edge burner exposure
Core Criteria
No specimen shall burn to top or side edge; afterflame ≤ 2 s; afterglow ≤ 2 s
Thermal Indices
Performance codes A1/A2 (flame), B1-B3 (convective), C1-C4 (radiant)
Key Applications
Industrial flash fire, petrochemical coveralls, molten metal splash protection
ASTM F1930 / NFPA 2112 Full-Scale Flash Fire Test

Instrumented Thermal Manikin Flash Fire Evaluation

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ASTM F1930 is the full-scale simulation test mandated by NFPA 2112. A lifesize, instrumented manikin equipped with 110+ calibrated thermal sensors is dressed in a complete protective garment ensemble and exposed to a controlled hydrocarbon flash fire for 3 seconds (target heat flux: 84 kW/m² / 2.0 cal/cm²·s). Computer software calculates predicted 2nd and 3rd degree body burns.

Key Test Parameters & Verification Metrics

Apparatus
Full-size thermal manikin with 110+ copper sensors in burn chamber
Fire Simulation
Propane gas torches delivering 84 kW/m² (2.0 cal/cm²·s) for 3.0 seconds
Core Criteria
Predicted total body burn percentage (2nd + 3rd degree burns)
Pass Threshold
NFPA 2112 requires predicted total body burn ≤ 50% (excluding head/hands)
Key Applications
Turnout gear, industrial petrochemical flash fire garments, drilling suits
ASTM F1959 / F1959M Arc Flash Protection

Electric Arc Rating (ATPV / EBT) Determination

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ASTM F1959 is the standard test method for determining the arc rating (ATPV or EBT) of flame-resistant textile materials for electrical safety workwear (NFPA 70E / ASTM F1506). Fabric panels equipped with temperature sensors are positioned at calibrated distances around a high-voltage electric arc discharge to measure heat transfer and calculate the energy threshold in cal/cm².

Key Test Parameters & Verification Metrics

Apparatus
High-voltage electric arc discharge array with panel sensors
Arc Discharge
Controlled open electric arc pulse at specified kilo-amperes
Core Criteria
ATPV (Arc Thermal Performance Value) or EBT (Breakopen Threshold) in cal/cm²
Classification
Categorizes PPE into NFPA 70E Arc Flash PPE Categories (CAT 1 through CAT 4)
Key Applications
Electrical utility switching gear, substation workwear, modacrylic arc blends

Expanding Laboratory Video Library

Our laboratory test demonstration library is actively expanding. Videos for cut-resistance testing (EN ISO 13997 / ANSI 105), molten metal splash (ISO 9185), and abrasion/tensile methods are being recorded and will be added here. Need a custom testing protocol or certified batch report for your specific purchase order?

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Need third-party test data for your construction?

We provide accredited third-party test reports (OEKO-TEX 100, SGS, BTTG, Arcwear, UL) for each production lot. Talk to our technical team to discuss test requirements for your market.

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