电站锅炉小径管内壁裂纹超声波检测

Ultrasonic Inspection on Inner Surface Cracks of Small-Diameter Boiler Tube in Power Plant

为防止锅炉炉管爆漏,采用超声波检测电站锅炉小径管内壁裂纹很有必要。介绍电站锅炉小径管内壁裂纹超声波检测方法;重点论述小径管内壁裂纹超声波检测探头的选择原则,参考试块的制作,灵敏度及扫查灵敏度的选择,验收标准的确定等。以水冷壁螺纹管为例,简要说明螺纹管内壁螺纹产生的伪缺陷波的判别和小径管内壁裂纹波的波形特征。实践表明,所给出的检测方法有利于提高锅炉小径管内壁裂纹检出率。

Taking the project of cathodic protection for the buried circulating water pipeline of Caoqiao Power Plant as a case, the principle of cathodic protection is briefly introduced and the design and construction method of sacrificial anode cathodic protection for the internal surface of the buried circulating water pipeline are presented, which include the design and construction approaches on the ventilation system required for the construction of the project. The implementation of the cathodic protection project shows that both the design and construction methods for the cathodic protection and ventilation are reasonable and effective.