Radiant Panel Flame Spread Test Machine | Wall & Ceiling Surface Flame Propagation Tester YYF008 Surface Flame Spread Test Apparatus | BS 476‑7 Building Materials Flame Propagation Tester Product Overview The YYF008 Surface Flame Spread Test Apparatus is a precision-engineered testing instrument designed specifically for evaluating the flame propagation characteristics of building materials in accordance with BS 476-7 standards. Key Applications Testing surface spread of