16-Feb-2009
There are three - four types of standard sieves any one of which can be followed for refractory testing or for making refractory formulation. Various standards are such as - American (Tyler), British Standard (BS), Indian Standard (IS) etc., a comparative chart is presented in the following table:
| Indian (IS) | American (Tyler) | British (BS) | ||||
| Mesh No | Aperture (mm) | Mesh No | Aperture (mm) | Mesh No | Aperture (mm) | |
| 570 | 5.5 | 3½ | | | | |
| 480 | 4.8 | 4 | | | | |
| 340 | 3.353 | 6 | 3.327 | 5 | 3.353 | |
| 240 | 2.399 | 8 | 2.362 | 7 | 2.411 | |
| 160 | 1.60 | 10 | 1.651 | 10 | 1.676 | |
| 120 | 1.201 | 14 | 1.168 | 14 | 1.204 | |
| 100 | 1.00 | 16 | 0.991 | 16 | 1.003 | |
| 85 | 0.842 | 20 | 0.833 | 18 | 0.853 | |
| 70 | 0.708 | 24 | 0.701 | 22 | 0.699 | |
| 60 | 0.592 | 28 | 0.589 | 25 | 0.599 | |
| 50 | 0.500 | 32 | 0.495 | 30 | 0.500 | |
| 40 | 0.420 | 35 | 0.417 | 36 | 0.422 | |
| 30 | 0.296 | 48 | 0.295 | 52 | 0.295 | |
| 20 | 0.211 | 65 | 0.208 | 72 | 0.211 | |
| 15 | 0.149 | 100 | 0.147 | 100 | 0.152 | |
| 10 | 0.104 | 150 | 0.104 | 150 | 0.104 | |
| 8 | 0.075 | 200 | 0.074 | 200 | 0.076 | |
| 5 | 0.053 | 270 | 0.053 | 300 | 0.053 | |
| 4 | 0.040 | 325 | 0.040 | | | |