Our manufacturing and inspection history
2.2.1 We did not find any abnormality from the manufacturing history of product this coil.
2.2.2 We did not find any abnormality from the inspection history.
The inspection results of tube's appearance at the annealing and packing process were good.
2.2.3 Also we did not find any abnormality from the loading control history by dispatching.
3. Presumption of cause.
3.1 Cause of nonconformity
3.1.1 We presumed that this discoloration was affected from the humid atmosphere.
3.1.2 The humid atmosphere also might be affected from a humid material packing,
atmosphere air of stock place and /or shrink air of inside tube.
3.2 Cause of outflow
If the discoloration occurred or became heavy after packing finished, it could not be inspected.
4. Countermeasure
4.1 We had informed this nonconformity to the packing process to pay more attention for
the packing materials controlling (Each packing material must be dry and clean) and
to strictly inspect the tube's appearance during packing also.
4.2 We had re-instructed packing operator to pay more attention to confirm all packing materials
application based on standard strictly.
4.3 We had informed this nonconformity to the dispatching process to strictly check product before loading
such as defect on tube and packing condition.
4.4 We also shall continue observation concerning this nonconformity to take the further action.
5. Other
We would