1. Surface Inspection: outside surface is smooth and no rag, corrosion, air hole, cracking, mechanical injury, etc..

2. Welding Inspection: welding line is smooth and no air hole, cracking, solder skips.

3. Flange Processing Inspection: strictly according with company regulations.

4. Drill Hole Inspection: all bolt holes uniformly distributed on center circle diameter.

5. Anticorrosion Inspection: we use high quality oil painting to meet local environment of customer. Primer uses epoxy zinc rich primer, inorganic zinc-rich primer; intermediate paint use epoxy micaceous iron or epoxy resin painting; finishing paint use acrylic rubber, chlorinated rubber or polyamine painting.