最近我队采用“予热焊接缓冷法”,为上海炼油厂成功地焊补了一台炼油设备——丙烷沉降塔上的裂纹。塔体材料为16锰钢,高20米,直径3米,壁厚65毫米。修复方法如下:1.采用碳弧气刨(碳精棒)去除缺陷; Recently, our team adopted the “Preheat Welding Slow Cooling Method” to successfully weld the crack on the propane settling tower of a refinery in Shanghai Refinery. Tower material is 16 manganese steel, 20 meters high, 3 meters in diameter, wall thickness 65 mm. Repair methods are as follows: 1. Carbon arc gouging (carbon rod) to remove defects;