Examples of preparation class acc. to different standards
| Standard | Standard WOMA | PN-ISO 12944-4 | pr. ISO 8501-4 | NF T35-520 | SSPC-SP 12/NACE5 |
| Low pressure washing [MPa] | < 20 | --- | --- | --- | < 35 |
| Pressure washing [MPa] | 20-70 | <70 | <70 | <70 | 35-70 |
| High pressure preparation [MPa] | 20-70 | 70-170 | 70-140 | 70-100 | 70-170 |
| Very high pressure preparation [MPa] | --- | --- | >140 | 100-140 | --- |
| Ultra high pressure preparation [MPa] | >170 | >170 | --- | >140 | >170 |