the problem found grime inside of coper tube. which, as you want to know the composition of the grime. What’s it ? I have contacted to SGS (Thailand) Ltd. They can’t do that.
So, I have contact to others institute as follow ;
1. Institute for Scientific and Technological Research and Services (ISTRS)
2. National Metal and Materials Technology Center (MTEC)
Included, I sent the picture and requirement we need to them already. They will feedback within this week. They can do ?