Title 7: Agriculture
PART 801—OFFICIAL PERFORMANCE REQUIREMENTS FOR GRAIN INSPECTION EQUIPMENT
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§ 801.8 Tolerances for sieves.
The maintenance tolerances for sieves used in performing official inspection services shall be:
(a) Thickness of metal: ±0.0015 inch.
(b) Accuracy of perforation: ±0.001 inch from design specification.
(c) Sieving accuracy:
| Sieve description | Tolerance |
|---|
| Direct comparison | Sample exchange |
|---|
| .064×
3/8 inch oblong | ±0.2 percent, mean deviation from standard sieve using wheat | ±0.3 percent, mean deviation from standard sieve using wheat |
| 5/64×
3/4 inch slotted | ±0.3 percent, mean deviation from standard sieve using barley | ±0.5 percent, mean deviation from standard sieve using barley |
| 5
5/64×
3/4 inch slotted | ±0.5 percent, mean deviation from standard sieve using barley | ±0.7 percent, mean deviation from standard sieve using barley |
| 6/64×
3/4 inch slotted | ±0.7 percent, mean deviation from standard sieve using barley | ±1.0 percent, mean deviation from standard sieve using barley |
