Failure and Protection of Carbon Steel Welded Joints of Spherical Cooking Vessle for Paper Industry

Welded carbon steel spherical cooking container is often used as cooking equipment for paper-making process.The failure modes of welded rotary digester are cracking and thinning caused by the complexity of the cooking process and possible welding defects existing in welded rotary digester.The service life of rotary digester could be prolonged by adjusting the main recipe to control the pH value of the cooking liquid strictly and taking appropriate welding materials and reasonable welding process.