Saudi ArabiaThe diameter of the rotary kiln of the YAMAMA project is 7.2m/6.2m. The welding process is: 1. Welders submerged arc welding examination and welding process qualification testing;2. Polishing inspection before welding of the external weld;3. Inspection after welding of the secondary weld backing;4. Preheating about 105 degrees before submerged arc welding to check and confirm;5. Multi-layer and multi-pass welding quality inspection during submerged arc welding;6. Inspection of the planing depth and groove pattern of the internal weld;7. PT inspection before submerged arc welding of the internal weld; 8. Inspect and confirm the internal weld by 105 degrees before submerged arc welding;9. Conduct random inspection of multi-layer and multi-pass welding quality during the embedded welding process of the internal weld;10. 100% ultrasonic flaw detection of all welds.

The project department carefully organizes and strictly controls quality, and welding operations are completed on time and with high quality. All welds100% ultrasonic flaw detection successfully passed.