For the solid body centralizers, we need to test the ID , OD and length, the number of blade according to the confirmed drawings. If the quantity is small we will test every casing centralizer , if the casing centralizer is good, then we will pack them.
If the quantity is large , like 10000 pcs, we will pick 10%-20% random , then test them.
Regarding the bow spring type of the casing centralizer, we will also use special testing machines to test the restoring force of the bows and the running force in the outer casing. We will strictly test according to API standard.