How to confirm the quality of piston

1: A good piston supplier first of all he will fix his quality, rather than the pursuit of low-value customers
2:Piston plays an important role in the engine, the piston quality directly affects the life of the engine
If your machine working environment is poor suggest you consider the quality of the piston, after all, the machine is to you create value; and site maintenance is not convenient, if it is in a dusty area is likely to be the side of the maintenance side of the dust into the engine’s work.
3:We all know the piston process is: casting bad, clean, inspection, every bad processing, heat treatment, the second processing, inspection, warehousing, shipping.
But how many factories can do 100% inspection? And how many factories can do in the production process each piston inspection three times to ensure its quality?
What is the inspection equipment in the inspection process? Flooded? Ultrasound? An eye exam?
The piston in our factory is guaranteed to be 100% inspected by ultrasonic 3 times from the failure of the piston to the storage of the finished product.