Study on Material Selection Method of Boiler Pressure Pipe Based on the Unity of Strength and Economy
Aiming at the economical and reasonable material selection of pressure pipes in boiler design,this paper analyzes the relationship between the wall thickness,weight and allowable stress of pipes of different materials from the angle of strength calculation.Combined with the unit price of each raw material,an economic evaluation model of pressure pipe material selection based on the function of allowable stress and unit price of raw material is given,and the evaluation model is used to verify and compare 20 G,SA-106 C and 15 Ni1 MnMoNbCu.The results show that when the design temperature is greater than 220℃,15 Ni1 MnMoNbCu is preferred for pipes and headers,and SA-210 C is preferred for small tubes on the heating surface,that is,materials with high allowable stress near the upper temperature limit are selected.The evaluation model provides a new method for economic material selection of pressure pipes,which can further reduce the cost of raw materials and improve the competitiveness of product.
pressure bearing pipestrengtheconomyevaluation model
万方数据
维普
