• Overall heat treatment

    Overall heat treatment

    The overall heat treatment is to eliminate the stress generated by welding, stabilize various geometric dimensions, change the welding metallographic ...

    20-12-2021 Blog
  • Knowledge of post-weld heat treatment

    Knowledge of post-weld heat treatment

    1. The welding residual stress is caused by the uneven temperature distribution of the weldment caused by welding, the thermal expansion and contracti...

    15-12-2021 Blog
  • Weld and heat treatment

    Weld and heat treatment

    1. Classification of welds The welds of each part of the pressure vessel are divided into four categories: A, B, C, and D. Class A welds refer to the ...

    07-12-2021 Blog
  • In the following situations, post-weld heat treatment should be considered

    In the following situations, post-weld heat treatment should be considered

    1. The conditions of use are harsh, such as thick-walled vessels that are in danger of brittle fracture when working at low temperatures, and vessels ...

    02-12-2021 Blog
  • Judgment of PWHT Necessity

    Judgment of PWHT Necessity

    Whether the pressure vessel is necessary for post-weld heat treatment should be clearly specified in the design, and the current pressure vessel desig...

    22-11-2021 Blog
  • Purpose of post-weld heat treatment

    Purpose of post-weld heat treatment

    1. Relax the welding residual stress. 2. Stabilize the shape and size of the structure and reduce distortion. 3. Improve the performance of base metal...

    15-11-2021 Blog

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