 |
|
|
|
|
|
|
|
 |
 |
 |
 |
 |
 |
 |
|
| LABORATORY-SCALE FLAME TEST |
Comparison between the new MSHA requirements (30 CFR 14) and the existing European standard (EN 12881) |
||
USA (MSHA) new |
Europe (EN) |
|
| Length of test sample | 1524 mm |
2000 mm |
| Width of test sample | 229 mm |
1200 mm |
| Side in contact with flame | undetermined |
each side |
| Sample clamped | yes |
no |
| Duration of exposure to flame | 5 min. |
10 min. |
| Specific gas consumption | 34 l/min. |
70 l/min. |
| Air velocity | 1 m/s |
1,5 m/s |
| Considered damage | only charred areas |
any |
| Required minimum undamaged length after test | undetermined |
100 mm |
| Note: All US criteria are weaker. | ||
 |
||