Fire resistance testing device BTA

automaticcomputer-controlledfor building materials

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. The Brandschacht Test Apparatus consists of: • The ‘Brandschacht’ has an interior size of 800mm by 800mm by 2000mm. • The chamber wall is a multi-layer structure, composed (from interior to exterior) of 2mm steel sheet, 6mm ceramic felt (density not exceeding 600kg/m3), two 40mm thick mineral insulation fibre (nominal density 100kg/m3), and steel sheet. • The chamber from bottom to top are the inlet chamber, air regulator, combustion chamber, measuring section, and outlet. • The inlet chamber is introduced with an air of constant rate and temperature through a duct of φ200 on the right side. • A constant temperature inlet system capable of providing a constant flow of air at a flow rate of 10±1m3/min and a temperature of 23±2°C. • An inlet chamber fitted with a type K insulated thermocouple for measuring the temperature of the inlet air with an accuracy of 0.1°C. • Air stabilizer, set above the inlet chamber, consisting of a porous steel plate and multiple layers of glass fibre felt, to homogenize the inlet airflow.