Table 4 Powder flowing properties based on angle of repose
No. | Angle of repose (degrees) | Type of flow |
|---|---|---|
I | 25–30 | Excellent |
II. | 31–35 | Good |
III. | 36–40 | Fair (flow aid not needed) |
IV. | 41–45 | Passable (may hang up, flow aid might be needed) |
V. | 46–55 | Poor (agitation or vibration needed) |
VI. | 56–65 | Very poor |
VII. | Over 66 | Very, very poor |