दबाव पोत का आंतरिक और बाहरी निरीक्षण

The inspection of the inside and outside of the pressure vessel can only be carried out after the vehicle is parked and the inside of the vessel is cleaned. The main content of the inspection includes all the contents of the external inspection, as well as the corrosion and abrasion of the inner and outer surfaces; all welds, head transition areas and other stress-concentrated parts are inspected for cracks with the naked eye and a magnifying glass, and ultrasonic waves are used when necessary. Or radiographic inspection to check the internal quality of the weld; measure the wall thickness. If the measured wall thickness is less than the minimum wall thickness of the vessel, the strength check should be carried out again, and pressure reduction or repair measures should be proposed; for vessels that may cause changes in the metallographic structure of metal materials, metallographic inspection should be carried out if necessary; The main bolts of the ultra-high pressure vessel should be inspected for cracks by using magnetic powder or coloring. Through internal and external inspections, analyze the causes of the defects detected and put forward treatment opinions. Re-inspection is required after repair. The inspection cycle for the inside and outside of the pressure vessel is once every three years, but the inspection cycle for the container for strongly corrosive and highly toxic media should be shortened. Vessels with serious defects found in operation and vessels with poor welding quality and unknown material's anti-corrosion ability should also shorten the inspection period.