Thermal & structural analysis in Welded pipe flange Joints with help of FEA

for large components it is very difficult to produce castings. Fabrication process is referred over casting because of its ease and simplicity in producing welded joints for large vertical turbine pumps. Fabrication involves welding of components like pipe to flange, motor stool, discharge head, connection of piping with different welded joints. During welding process stresses are developed in weld elements. The stresses can have important consequence on performance of engineering components. Weld stresses have a significant effect on corrosion fracture, corrosion resistance and fatigue performance. The reduction of these stresses is desirable. The nature of stresses in welded structures is considered in terms of their magnitude, direction, spatial distribution, range and variability. Welding of pipe to flange results in stresses built up and distortions which provide negative efforts on structural integrity and sealing capability of pipe flange joints. The effect that occurs are stress corrosion cracking, brittle fracture, reduced fatigue and creep strength, poor sealing performance and reduced buckling strength etc. Therefore it becomes very essential to determine stresses induced in elements. The Paper gives the brief look on investigation the extent and distribution of stresses & flux built up and distortions in welded pipe flange joints.