The solid solution heat treatment should be carried out before furnishing austenite stainless steel boiler tubes

otherwise

it is easily to make partial tubes on heating surface of the boiler to be cracked and leaked.Tube samples of cracked bend tubes selected from the austenite stainless steel superheaters of three power plants have been tested and analysed

an approach to the influence of solid soluation heat treatment upon the performance of these boiler tubes being made.Results of test and study show that the cracks occurred on the bend tubes is due to the solid solution heat treatment hasn't been carried out according to the standard

resulting in oxidizing corrosion along the crystals under joint effects of the residual stress in tube fabrication

the residual stress in tube-bending

and the thermal expansion stress during the time of operation.For these

corresponding preventive measures have been put forward.