• Review all the materials and documents;
• On-site witness the sample of raw material tested by third-party lab;
• Witness the review of arrived materials, like flange, steel plate, etc;
• Inspect the laying-off and rolling of tower plates;
• Inspect the assembly of flange and tower barrel;
• Witness longitudinal and girth welding and inspect appearance of welding line;
• Witness NDT;
• Witness the inspection of dimension, tolerance and foundation ring flatness measurement;
• Rust removal and anticorrosion witness and etc.