The paper compares and analyzes the relevant specifications for calculating the span of ther-mal pipelines inside and outside the self owned power plants of iron and steel enterprises,sorts out the corresponding calculation formulas and qualification criteria,and takes a typical energy medium pipe-line as an example to list three situations for calculating the span,and analyzes the reasons for the differences in calculation values;it also pointed out the shortcomings of the simplified formulas for nat-ural frequency verification in various specifications and DL/T 5054-2016 strength condition calcula-tion.
piping spanstrengthstiffnessdeflectionslopenatural frequency