Flame Resistant (FR) Conveyor Belt

When belts are used in places not easily accessible, it is very important that fire risks be eliminated if possible. Two kinds of fire resistant belts are manufactured: one is specially treated natural SBR Rubber and the other one Chloroprene covered belt

Flame Duration Time

To a flame at 1000±100°C, a belt test specimen of full thickness shall be inserted against flame, and after keeping it burning for 1 minute, take the burner off, then measure the flame duration time of the tested specimen.

Flame Reappearance Test

After 60±10 seconds from when the burner is removed for the flame duration test. air is blown at speed of 1.5 m/sec. with an air blower from the direction shown in the figure to the left. And the test specimen shall be visually inspected for reappearance of flame.

Drum Friction Test

For each test conducted, the belting shall show no sign of flame (sparks or glow not being objectionable), the drum temperature shall not exceed 325°C, and the sample shall part within the 3 hour test period.

Type of Flame Resistant (FR) Conveyor Belt




Type Applicable
standards		 Specified item for test Duration of
flame		 Reappearance
of flame		 Requirements
FR-100 CNS
JIS		 Flame duration time per "Flame Test
with Cover Rubber"		 Within 60 Seconds
(Average of 3 pcs.)		 Not permitted Extinguishes as the flame is removed. Re-ignition of fire by air-blow should not occur
FR-200 BS
AS
IS
SABS		 Duration time of Flame and Glow
per"Flame Test with Cover Rubber"
Whether or not there is heat
generation and fire ignition per
"Drum Friction Test"
"Electric resistance on belt surface"		 Less than 45 sec.
(A total of six )
Less than 15 sec.
( each test )
EMR Duration time of Flame and Glow
per"Flame Test with Cover Rubber"
Whether or not there is heat
generation and fire ignition per
"Drum Friction Test"
MSHA Duration time of Flame and Glow
per"Flame Test with Cover Rubber"
ISO
DIN
NF		 Flame duration time per "Flame Test
with and without Cover Rubber"
"Electric resistance on belt surface"