DIN 4102-15/16 Brandschacht Test Apparatus For Building Materials

DIN 4102-15/16 Brandschacht Test Apparatus

1. Application

DIN 4102-16 describes the uniform procedure for testing building materials in the "Brandschacht" according to DIN 4102-15. The revision of DIN 4102-16 is carried out in order to update the list of standardised products that are used in the test method. The test method is used for the fire testing of building materials. The Brandschacht is a square housing into which air at a constant flow rate is introduced from below, and from which flue gas escapes from above. It is equipped with a square gas burner by means of which the specimen arranged in a mounting frame so as to form a flue, are exposed to flaming.

Brandschacht Test Apparatus, in accordance with DIN 4102 Part 15, is designed for the fire testing of building materials and elements. The ‘brandschacht’ is a square chamber, which has a constant flow of air introduced from the bottom, and combustion gas escapes from the top of the chamber. The specimens are mounted vertically and exposed to the flame generated by a square gas burner.

2. Technical parameters

2.1 The test device includes combustion chamber, control cabinet, burner, specimen holder, calibration device, etc.;

2.2 The internal hollow size of the combustion chamber is 800mm*800mm*2000mm, and the wall of the chamber is a multi-layer insulation structure;

2.3 The combustion chamber wall is a multi-layer structure, from the inside to the outside: 2mm steel plate, 6mm asbestos sheet (density not exceeding 600kg/m3), 40mm thick mineral insulation fibre (nominal density 100kg/m3), outer steel plate;

2.4 Combustion chamber from bottom to top, inlet chamber, air regulator, combustion chamber, measuring chamber and outlet flue;

2.5 The inlet chamber is fed with air of constant rate and temperature through a duct of φ200 on the right side;

2.6 A constant temperature inlet system capable of providing a steady flow of air at a flow rate of 10±1m3/min and a temperature of 23±2°C;

2.7 An inlet chamber fitted with a type K armoured thermocouple for measuring the temperature of the inlet air with an accuracy of 0.1°C;

2.8 Air stabiliser, set above the inlet chamber, consisting of a porous steel plate and multiple layers of glass fibre felt, to homogenise the inlet air flow

2.9 a combustion chamber to house the burner and the test stand, which is a rectangular frame 1000 mm high with screws on all four sides to adjust the mounting distance of the specimen

2.10 a burner, a square burner 200 mm * 200 mm, with combustion nozzles evenly distributed on all four sides, with nozzle openings of 3.5 mm diameter, capable of providing a uniform jet flame

2.11 A gas system, consisting of a pressure reducing valve, pressure gauge, solenoid valve, mass flow meter and electric spark igniter;

2.12 Equipped with a methane mass flow meter and an air mass flow meter to control the gas flow with a control accuracy of better than 2%;

2.13 equipped with a high voltage electric spark igniter for remote ignition of the ignition source

2.14 with upper and lower furnace doors installed outside the inlet and combustion chambers to facilitate the installation of specimens and maintenance equipment, with explosion-proof, high temperature resistant glass installed on the upper door to facilitate observation of test phenomena

2.15 The measuring section is fitted with a T-pressure measuring tube and flue thermocouple;

2.16 The use of a T-type pressure measuring tube connected to a micro differential pressure sensor, with software for realistic pressure in the chamber in real time;

2.17 the use of American Omega type K stainless steel armoured thermocouples with an accuracy of 0.1°C;

2.18 Square flue, located at the top of the combustion chamber, with the lower part connected to the combustion chamber and the upper part connected to the external exhaust system;

2.19 Configuration of a hot wire anemometer, range 0-10m/s, accuracy 0.1m/s, for air uniformity calibration;

2.20 Omega thermocouples for both the box wall and the flue, which can be calibrated for thermal load by software;

2.21 The test software is a data acquisition system that collects temperature, pressure and time data in real time, controls the gas flow, performs tests and exports test reports.

3. Installation conditions

2.1 Indoor installation.

2.2 Combustion box dimensions 1290mm*1050mm*3950mm

2.3 Control cabinet size 2000mm*1050mm*850mm

2.4 Electricity supply: 220V 32A;

2.5 Gas: methane, 99% purity or above;

2.6 Compressed air: 0.6Mpa, de-oiled and de-watered;