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.
