Konveyör Bant

1. DRUM FRICTION TEST 

The danger associated with a stalled belt and a driven rotating drum or pulley resulting in frictional heat build up. 

A test piece of conveyor belt,
suitably mounted and tensioned,
is wrapped half way around a
rotating steel drum, simulating a
stalled belt. The test is continued
at specified tensions for a given time period, or until the belt breaks. The presence, or absence, of flame or glow is noted and the temperature of the drive drum is measured. The test is conducted in still air and/or in moving air. This test has probably been the major single contributor to mine safety in respect to conveyor
fire prevention. 

2. LABORATORY FLAME TEST 

The possibility of igniting the considerable mass of a conveyor belt with a relatively small ignition source. 

This hazard is usually assessed by the application of a small "Bunsen" type flame to a belt sample and observation of the effect. The time taken for all flame and/or glow to self-extinguish 

is noted. 

3. GALLERY FIRE TEST 

The possibility of a belt, ignited from a larger ignition
source, spreading the fire to other areas (often referred 

to as fire propagation). 

This hazard can only be assessed
by a gallery fire test, which utilises
a sample length of conveyor belt
supported by a steel trestle
placed in a cabinet of specified dimensions. A continuous flow of air is drawn through the cabinet whilst the sample of belt is ignited at one end by a gas burner for a defined period of time. 

Upon removal of the flame source the length of undamaged belt is quantified by physical measurement and/or mathematical means. Fenner Dunlop's in-house test facility is constructed in accordance with EN 1288-1 (Section 6) Mid Scale Fire Propagation Test and is the only one operating in the UK. 

4. ELECTRICAL RESISTANCE TEST 

The possible build-up and subsequent discharge of static electrical charge on moving conveyors.