Flame Retardant Conveyor Belt
Flame retardant conveyor belts are primarily needed for internal transportation within buildings and also in tunnel and mines where safety is of paramount importance, in environments where coal dust, gas, fertilizer or other combustible materials are involved, it is essential that the conveyor belt being used cannot created static electricity that can ignite gases and dust in the atmosphere.
This type belt is designed mainly:
- To prevent the propagation of an accidental fire.
- To guard against risks of explosion due to the accumulation of static electricity.
| Flame retardant standards | |||
|---|---|---|---|
| DESIGNATION | Standard | Characteristics requireds | Brief decription of test,Tests and test method. |
|
K |
ISO 340 |
Anti-static Electrical conductvity, Flame-resistant with cover | Cover rubber static conductivity mube be¡Ü3x108¦¸. Drum friction test ¡Ü325¡æ. Spirit burner flame performance. Belt tested with cover. |
|
NF EN 20340 | |||
|
DIN 22103 | |||
|
DIN EN 20340 | |||
|
S |
ISO 340 |
Anti-static Electrical conductvity, Flame-resistant with and without cover | Cover rubber static conductivity mube be¡Ü3x108¦¸. Drum friction test ¡Ü325¡æ. Spirit burner flame performance. Belt tested with and without cover. |
|
NF EN 20340 | |||
|
DIN 22103 | |||
|
DIN EN 20340 | |||
| Flame Retardant Technical Data | ||
|---|---|---|
| Cover rubber performance | Tensile strength(Mpa) | ¡Ý15 |
| Elongation at break(%) | ¡Ý350 | |
| After ageing(%) 70¡æ¡Á168H | Tensile strength change rate¡À25 | |
| Elongation change rate at break ¡À25 | ||
| Hardness (SHORE A) | 65¡À5 | |
| Abrasion loss (mm³) | ¡Ü200 | |
| Adhesion | ¡Ý5N/mm | |
| Average value of Top/Bottom static conductivity(¦¸) | ¡Ü3¡Á108¦¸ | |
| Drum friction | The Max.temperature of drum surface(¡æ) | ¡Ü325 |
| Flame or glow | no sign of flame, sparks or glow | |
| Spirit burner flame performance | With cover rubber:Average ¡Ü3 seconds, individual ¡Ü10 seconds | |
| Without rubber cover: average ¡Ü5 seconds, individual ¡Ü15 seconds | ||
| Standard | DIN EN, MSHA | |
Areas of application:
Mining industry, coal cleaning plants, power plants, electric utilities.
