EN 16989 Fire behaviour test for a complete seat
Compliance
EN 16989, EN 45545-2
The Calorimetry system for complete seats used in railways, in accordance with EN 16989, provides a means of determining the burning behaviour of a rail vehicle seat design using a set of complete seats prepared and tested according to the procedures. It also sets out a standardized procedure to assess a seat’s potential for vandalization.
The test seats are subjected to a 15kw propane-flued ignition source under an exhaust hood with a well-ventilated condition. The measurement to be made include the heat release rate (HRR), maximum average heat release (MARHE), total smoke production (TSP), and flame height.
EN 16989 Test (from SYCHTA)
EN 16989 Test Equipment consists of
Calorimetry Measurement System containing a test room, collection hood & ducts, Instrumented duct, mass flow controller, burner and mass flow controller for calibration, data acquisition system, gas concentration analysis system, and windows operating software.
Instrumented duct, including pressure probe, thermocouples, sampling probe, and optical measurement unit.
The pressure probe is an ISO 9705 standard bi-directional probe, made of stainless steel, connected to the pressure transmitter through a Teflon tube.
Pressure transmitter installed in the integrated collection section, short-range accurate detection of pressure changes, range 0-250 Pa, accuracy ±2.5 Pa, T90 response time less than 1 second.
Three K-type thermocouples to measure the pipe temperature, diameter 0.5mm, and meet the requirements of EN 60584 armoured insulated K-type thermocouples.
Stainless steel probes for quick disassembly and easy cleaning.
Light attenuation system, of the incandescent type, mounted on the side pipe of the smoke exhaust using a flexible joint and containing the following devices.
The light source is incandescent and at a colour temperature of (2900±100)K Power supply of a stable direct current with a fluctuation range of ±0.5% (including temperature, short and long-term stability).
A lens system to concentrate the light into a parallel beam of at least 20 mm in diameter. The light-emitting aperture of the phototube shall be located at the focal point of the lens in front of it and its diameter (d) shall be determined by the focal length (f) of the lens so that d/f is less than 0.04.
The Light detector is a silicon photodiode probe imported from Japan, the photoelectric detection chamber has a linear stability of 0.1%, a 10-bit measurement range, the silicon photodiode whose spectral distribution responsiveness coincides with the CIE (light curve), and the standard function V(γ) can achieve an accuracy of at least ±5%.
The T90 response time of the optical attenuation system does not exceed 3s.
The burner flow is controlled by a mass flow controller, medium propane, range 0-450mg/s, accuracy ±2%, response time 0.1s.
The burner flow rate is controlled by software, and output can be stabilized at 324±5mg/s, with an ignition device and automatic timing extinguishing function.
Standard ISO 9705 flame calibration burner.
The calibration burner flow is controlled by Alicat mass flow controller, medium propane, range 0-7g/s, accuracy ± 2%, response time 0.1s.
The calibration burner flow rate is controlled by software for stable output of step calibration gas quality, maximum output power 300kw, with ignition device and automatic timing extinguishing function.
The ignition device of the calibration burner is a pilot flame, which greatly improves the success rate of ignition, and the ignition can be controlled remotely, safe and reliable.
The gas concentration analysis system, consists of a three-stage filtration system, cold trap, sampling pump, drying column, cold trap, rotameter, gas concentration analyzer.
Three-stage filtration system including, first stage glass fiber cotton coarse filtration; second stage Parker filter filtration, precision 2μm; third stage PTFE membrane filtration, precision 0.5μm.
The filter cartridges can be quickly disassembled and replaced, and the accuracy of the filter cartridges can be selected according to the actual situation.
The compressed pump type cold trap, cooling capacity 320KJ/h, dew point stability 0.1℃, static change 0.1K, self-starting and maintenance-free without setting, with water evacuator, can automatically discharge cooling water.
The vacuum type sampling pump, sampling capacity 16L/min, continuous output +50KPa sampling pressure, gas-tight engaged, low noise, low vibration.
The flowmeter with a range of 0-1L/min, which can steadily output sample gas to the analyzer and reduce the measurement error of gas concentration caused by airflow changes.
Paramagnetic type O2 analyzer, measurement range of 0 to 25%, the accuracy of ± 0.01%.
NDIR type CO2 analyzer, measurement range of 0 to 10%, the accuracy of ± 0.01%.
The data acquisition system (for automatic data recording), for O2, CO2, the accuracy is at least 100×10-6 (0.01%), for temperature measurement, the accuracy is 0.5℃, for all other instruments, it is 0.1% of the full-scale output value of the instrument, for time, it is 0.1S, using Advantech acquisition module.
EN 16989 operating software with functions including, but not limited to, calibration of each sensor, system step calibration, standard test procedures, data reading and reporting output.