on april 19, the hydro-test of 3# hpht pc boiler for dongyin gangcheng project was conducted successfully for one-time, which was witnessed by csei, the owner, construction part and supervisors. the pressure increased to test pressure13.9mpa at 11:48 a.m, after 20 minutes hold, came down to design pressure 11.1mpa.each technical index for 3# boiler met the design requirements after overall inspection. there aren’t any leakage and residual deformation happened on pressure parts and welding joints, which made a complete success.