Dear Khun Kriengsak,
Mr. Khun Tony Zhang from AP China coming for this inspection activates, required to prepare inspection tools in advance, the tools: UV Lamp, Non-Wover Fabrics, small size iron wire.
The inspection method for the piping may as below:
i. For small piping, we can use iron wire tie up the non-woven fabrics, let non-woven fabrics pass through the prefabricated piping, and then we can use UV lamp to check the non-woven fabrics to see any residue.
ii. For large diameter pipe, by using bright torch and UV lamp to check.
His schedules as below mails details