What is sagging in boiler?

Sagging in a boiler refers to the downward displacement or deformation of boiler components, particularly in the drum or headers, which can occur due to excessive weight, thermal expansion, or structural weaknesses. This condition can lead to misalignment of piping and fittings, increased stress on materials, and potential failure of the boiler system. Monitoring and maintenance are essential to prevent sagging, as it can impact boiler efficiency and safety. Regular inspections help identify early signs of sagging to mitigate risks.