Is it necessary to verify the pull-out stress of pipe fittings under the hydrostatic test pressure of the heat exchanger?
Thread Content
Is it necessary to verify the pulling stress between the tube sheet and the tubes under the hydrostatic testing conditions of the heat exchanger? If so, can the smaller value of the stresses on the tubes and the tube sheet in the formula for calculating the allowable pulling stress be replaced by 0.9 times their yield strength?
How is the pulling force between the tube and the tube sheet generated? It has nothing to do with the hydrostatic test!