ASTM Standards for Cable Combustibility Testing
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The bundled wire and cable combustion testing machine is manufactured in strict accordance with GB/T 18380.31-2022. equivalent to IEC 60332-3-10:2009 standards. It is used to evaluate the ability of vertically installed bundled wires, cables, or optical cables to inhibit vertical flame propagation under specified conditions. This testing equipment is independently developed and manufactured by Shanghai Qianshi Precision Electromechanical Technology Co., Ltd., offering high cost-effectiveness and comprehensive after-sales service.
Standards
IEC60332-3-10:2000:Tests on electric and optical fibre cables under fire conditions - Part 3-10: Test for vertical flame spread of vertically-mounted bunched wires or cables
GA306.1-2007:Flame retardant and fire resistive cables - Classification and requirement for flame retardant and fire resistive cables with plastic insulation - Part 1: Flame retardant cables
Main components
Testing chamber, electric control system, air source, ignition source flew control system (propane gas and air compressed gas), steel elevator, Fire extinguishing devices, emissions purification equipment (user option).
Parameters
| Feature/Specification | Details |
|---|---|
| Overall Space Size | 2500mm (length) * 3200mm (width) * 4500mm (height) |
| Material | Thermal insulation with a heat transfer coefficient of 0.7W∙m⁻²∙K⁻¹, i.e., coated 65mm thick mineral fiber stainless steel plate |
| Air Source | Control gas flow through the box at (5000 ± 500) L/min, stabilize air flow rate during test; spraying device to forcibly stop burning after test completion |
| Steel Ladder Type | Standard steel ladder width: 500mm; Wide steel ladder width: 800mm |
| Discharge Purification Device | Test box equipped with a collection and washing smoke device that does not alter air flow through the test box |
| Ignition Source | One or two belt-type propane gas burners with supporting flow meters and venturi mixers; fire supply surface drilled with 242 flat metal plates with 1.32mm diameter apertures, center distance of 3.2mm, staggered in three rows of 81. 80. and 81 holes respectively, within a nominal size of 257×4.5mm; additional guide holes on each side of spout plate to maintain steady flame burning |
| a) Flow Control | Each burner equipped with a rotameter for accurate control of propane and air inflow rate |
| b) Airflow Rate (Test Conditions: 100kPa, 20℃) | Air: (77.7 ± 4.8) L/min; Propane: (13.5 ± 0.5) L/min |
| Ignition Source Position | Torch placed horizontally, (75 ± 5) mm away from front surface of cable sample, (600 ± 5) mm away from bottom of test box, symmetrical with axis of steel ladder; ignition point located in center between two rungs of steel ladder, at least 500mm away from lower end of sample |
| Observation Window | Tempered glass observation window surrounded by stainless steel edge |
| Exhaust System | Spiral exhaust fan; 2 sealing push and pull plates; 2.0mm stainless steel |
| Air Inlet | 1 (Φ160mm) |
| Bottom Fixed Frame | 40mm * 40mm square tube production |
Application
Apply to evaluate suppression ability of spread of fire for bundles installed wires and cables ,under specified conditions.
Features
1. Equipped with a standard stainless steel ladder, conforming to the requirements of GB/T18380.31;
2. Two sample support racks are included;
3. The ladder is made of stainless steel, which is corrosion-resistant and easy to clean;
4. An air inlet port measuring 800±20(W) × 400±10(D) is located in the lower part of the chamber, 150±10mm from the front of the chamber;
5. A K-type armored thermocouple with a 2mm diameter is installed inside the chamber;
6. The airflow inside the combustion chamber can be stably controlled at (5000±500) L/min.
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