Step of work.
1 check the tube.
Cut the tube to bo test around 2 meters.
Divide to :
Form 1 : Cut into corrode hydrochloric acid to check the groove and the tube. And type of tube beneath enamel.
From 2 : Cut to be test. (Item 4-10 & Item 17-18)
2 Check the tube.
Dipped the work item1 into hydrochloric acid for bite out to the tube only.
Dipped about 1 minute. (For NSG only.)
3 Chevk the tube.
Cleaning the workpiece.
4.Check the tube.
Checking workpiece.
- Don't have a groove.
-Don't have a scratch.
Verrry sorry for I make unfinish.
But I make it full ability.