In November 28th, 3# liquid ammonia detection round end, after testing found no problem using the influence the safety of spherical tank.

Responsible for the inspection of the unit is in Nanjing chemical industrial equipment inspection center. Before inspection, they first refer to the design, manufacturing and installation information, according to the actual problems in installation, carry out targeted detection. The main appearance inspection of spherical tank, the inner wall thickness determination, hardness test, 100% magnetic particle inspection on inner surface of weld, T type, Y type weld ultrasonic testing and nozzle welds of penetrant testing. Because of the spherical tank interior is dark, poor visibility, inspection unit was used in fluorescent lamp fluorescent magnetic particle distribution, effectively avoid due to environmental factors reduce the detection quality, the detection method to the defect detection rate is greatly improved.

On the basis of the use of the actual problem, put forward the need to enhance the corrosion inspection unit of spherical tank top plate and take over and cold work, carried out timely treatment is now testing the problems found. After the evaluation, the spherical tank safety status grade was grade two, equipment in good condition.