Rotodynamic pumps -- Hydraulic performance acceptance tests -- Grades 1, 2 and 3
It specifies three levels of acceptance:
- grades 1B, 1E and 1U with tighter tolerance;
- grades 2B and 2U with broader tolerance;
- grade 3B with even broader tolerance.
It applies either to a pump itself without any fittings or to a combination of a pump associated with all or part of its upstream and/or downstream fittings.