CIRCUMFERENTIAL LUG FOR SUPER-CRITICAL BOILER ANALYTICAL DESIGN AND COMPUTATIONAL ANALYSIS USING ASME CODE

Nirmal Kumar Balaguru, Garima Sharma, Gopinath Sampathkumar, Ram Mohandas

Abstract: The paper consist of design of a circumferential lug analytically using ASME Section II Part-d for Material properties and ASME Boiler and Pressure Vessel Code. The configurations of the lug and the necessity of their configuration, the materials that can be used and supporting computational results are included. Since the divisions of boilers cannot be kept in ground to avoid irregular expansion. Lug should be perfect in width and thickness so that it will not leave the header from structure as well as lug should not tear the circumferential material. Hence the analytical Lug which is designed with the formulas proposed is analysed in software computationally and it is verified with stress intensity, von misses stress and also with different kind of principle stress namely first second and third. The plots namely Lug Span Factor, Header Unit Hoop Stress, Stress Ratio for W/D , Reduction Slope, Reduction applied to Lug Width Ratio (SR ) are also derived and plotted for future use.

Keywords: Super-critical boilers, Lug, SA properties and ASME CODES

DOI: https://doi.org/10.15623/ijret.2015.0408060