Dear JAR,
I have shared my observation when we faced lot of production issue at XLPE insulating process at CV lines in some LT meetings earlier and formal discussion since May as attached email.
In 2006, when we found a lot of Quality issues from CV line, this loading tubes are the root cause and can dissolve the insulating issue once we checked and changed all the loading tubes passages of CV lines at that time. After that, I think we have formal maintenance plan for changing the loading tubes of CV lines but what I found recently is that only the plastic tubes and stainless tubes in the Clean Room of CV lines have been change periodically but the tubes on 2nd and 3rd stairs of CV lines are maintained old and dirty inside (lot of dust).
Note:
- I have not yet checked the bottom unloading tube/passage of XLPE compound and loading tubes of S/C XLPE compounds at VCV line. I will check and share.