The FCZ-50 Textile Vertical Flammability Tester is a professional laboratory testing system designed to evaluate the flame resistance, afterflame time, afterglow time, and damaged length (char length) of vertically oriented textiles and protective fabrics. Built in compliance with ASTM D6413, 16 CFR Part 1615/1616, ISO 6940/6941, BS EN ISO 15025, and national standard GB/T 5455-2014, this apparatus provides standardized test conditions for flame-retardant fabric qualification.
Featuring a precision 11 mm inner-diameter Bunsen burner, dual specimen conditioning modes (3 s ignition for oven-dried samples and 12 s ignition for standard conditioned samples), a full range of standardized char length tear weights (54.5 g to 453.6 g), and high-resolution timing (0.1 s accuracy), this advanced Textile Vertical Burning Tester is an essential tool for garment manufacturers, technical textile mills, aerospace interior suppliers, and third-party testing laboratories.
Textile Vertical Flammability Tester Compliance & Standards
This vertical fabric burning test system enables certified laboratories to conduct formal flame resistance and char length evaluations across international and regional standards:
| Standard Code |
Standard Title & Scope |
Primary Testing Application |
| ASTM D6413 / D6413M |
Standard test method for flame resistance of textiles (vertical test) |
North American benchmark for flame-resistant workwear, protective apparel, and industrial fabrics |
| 16 CFR Part 1615 / 1616 |
Standard for the flammability of children’s sleepwear (Sizes 0–6X & 7–14) |
Mandatory U.S. CPSC safety compliance testing for children’s sleepwear and nightwear fabrics |
| ISO 6940 & ISO 6941 |
Textile fabrics — Burning behaviour — Determination of ease of ignition & flame spread properties |
International standard method for vertically oriented interior drapery, curtains, and apparel fabrics |
| BS EN ISO 15025 / BS 5438 |
Protective clothing — Protection against flame — Method of test for limited flame spread |
European safety qualification for firefighter turn-out gear and industrial welder protective suits |
| GB/T 5455-2014 |
Textiles — Burning behaviour — Determination of damaged length, afterglow time and afterflame time |
Mandatory Chinese national test method for vertical flame retardancy of woven and knitted fabrics |
Technological Features of FCZ-50 Textile Flammability Tester
- Dual Conditioning & Ignition Test Profiles: Fully supports both Condition A (12 s ignition with propane/butane for standard-conditioned fabrics) and Condition B (3 s ignition with ≥97% purity methane for oven-dried specimens).
- Standardized Char Length Tear Weight System: Includes five precision-calibrated weights (54.5 g, 113.4 g, 226.8 g, 340.2 g, and 453.6 g) mapped directly to fabric weight per unit area (≤101 g/m² to ≥650 g/m²) for accurate tear-strength damaged length calculation.
- Precision Bunsen Burner Assembly: Features an 11 mm internal nozzle diameter Bunsen burner ensuring consistent gas flow velocity and stable flame geometry during exposure.
- Enclosed Draft-Free Combustion Chamber: Compact stainless steel chamber (329 mm × 329 mm × 767 mm) insulates the flame from ambient air currents while observing combustion via a clear front window.
- High-Precision Measurement & Timing: Electronic timer measuring afterflame and afterglow durations with 0.1 s accuracy, combined with 1 mm linear resolution for damaged length reporting.
Technical Specifications of FCZ-50 Textile Flammability Machine
| Governing Test Standards |
ASTM D6413, 16 CFR 1615/1616, ISO 6940, ISO 6941, BS EN ISO 15025, GB/T 5455-2014 |
| Combustion Chamber Inner Dimensions |
(329 ± 2) mm (W) × (329 ± 2) mm (D) × (767 ± 2) mm (H) |
| Overall Equipment Dimensions |
632 mm (L) × 332 mm (W) × 852 mm (H) |
| Specimen Holder & Dimensions |
Holder internal frame: 356 mm × 51 mm; Specimen size: 300 mm × 89 mm |
| Ignition Burner Specification |
Bunsen burner with 11 mm internal nozzle diameter |
| Test Gas Options & Ignition Time |
• Condition A: Propane, butane, or mixed gas (12 s ignition)
• Condition B: Methane (purity ≥97%) (3 s ignition) |
| Included Char Length Weights |
54.5 g, 113.4 g, 226.8 g, 340.2 g, and 453.6 g |
| Measurement Resolution |
Time: 0.1 s; Damaged Length: 1 mm |
| Power Supply & Power Rating |
AC 220 V ± 10%, 50 Hz; Power consumption: 100 W |
System Architecture & Testing Workflow of FCZ-50 Textile Flammability Tester
Standardized Testing Workflow:
- Cut specimens to 300 mm × 89 mm and condition according to Condition A (standard atmosphere) or Condition B (oven-dried at 105°C).
- Mount the sample inside the 356 mm × 51 mm vertical specimen holder and suspend it in the combustion chamber.
- Select test gas (propane/butane for Condition A or Methane ≥97% for Condition B) and set ignition timer (12 s or 3 s).
- Apply flame exposure. Automatically record afterflame time (duration sample continues burning after burner shuts off) and afterglow time.
- Attach the designated weight (based on fabric mass per unit area from Table 2) to the bottom corner of the burned sample, lift slowly, and measure the resulting damaged length (char length).
Target Customer Applications:
- Protective apparel, firefighter turnout gear, and welder suit manufacturing plants.
- Children’s sleepwear, curtain/drapery, and home textile quality control laboratories.
- Aerospace interior and military fabric certification organizations.
FCZ-50 Textile Vertical Flammability Tester FAQ
Q1: What parameters are measured during a vertical fabric flammability test?
A: The FCZ-50 evaluates three critical parameters: Afterflame Time (duration of visible flame after burner removal), Afterglow Time (duration of flameless glowing combustion), and Damaged Length (char length measured using standardized tear weights).
Q2: How is the char length weight chosen for testing?
A: The tear weight is determined by fabric mass per unit area (g/m²):
- ≤ 101 g/m²: 54.5 g weight
- > 101 to ≤ 207 g/m²: 113.4 g weight
- > 207 to ≤ 338 g/m²: 226.8 g weight
- > 338 to < 650 g/m²: 340.2 g weight
- ≥ 650 g/m²: 453.6 g weight
Q3: Can this device be used for ASTM D6413 workwear testing?
A: Yes. The vertical specimen frame, 11 mm Bunsen burner nozzle, 12 s ignition timer, and specified char length weights align with ASTM D6413 requirements.
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