This standard only specifies the control dimension accuracy of water passage components of hydraulic turbines, storage pumps and pump-turbines that are influential to the hydraulic performance as well as the surface quality of water passage components in the aspect of the requirements in prototype hydraulic turbine having geometrical similarity with the model.
This standard is applicable to the model and prototype hydraulic turbines, storage pumps and pump-turbines meeting one of the following conditions:
a) Whose power is 10MW and the above;
b) Radial flow machines, whose runner nominal diameter is 1.0m and the above;
c) Axial flow, tubular and diagonal machines, whose runner nominal diameter is 3.3m and the above;
d) Centrifugal storage pumps, whose runner nominal diameter is 1.0m and the above;
e) Impulse turbines, whose runner nominal diameter is 1.0m and the above.
Prototype hydraulic turbines, storage pumps and pump-turbines whose dimension and capacity are less than the above conditions may refer to this standard.
