We have all equipment and devices necessary for inspections and testing.
We have developed on line grinder Ultrasonic Inspection Machines, which efficiently detects harmful defects without affected by the small change in magnetization of rolls.
Such machines are available to be supplied to our customers.

For quality assurance of shell, we carry out following 4 kind Ultra Sonic Test. The effective inspection thickness of each method is deference.

Surface wave Creeping wave Dual probe wave Straight wave

effective inspection thickness is from surface to about 0.3mm. effective inspection thickness is from just under surface to about 10mm. effective inspection thickness is from about 3mm to about 20mm. effective inspection thickness is deeper than 20mm.

Surface wave and creeping wave are carried out by automatic ultrasonic test.
Dual probe wave and straight wave are carried out by manual ultrasonic test.