Appraisal of microstructure and mechanical properties for the 12Cr1MoV steel main steam pipe after 190 thousand hours running;

Comparison Selection on Materials for Main Steam Pipe of Ultra-supercritical Unit

73MPa pressure,the main steam pipe in a thermal power plant,especially the bends were badly damaged.

State test and assessment of the main steam pipeline of 1 # boiler;

Study on operation life of P92 steel thin-walled main steam pipeline in ultra-supercritical unit

Directing againt the problem of joint interface misplacement occurred between the main steam pipeline and the main steam valve of a 220 MW heat-supplying unit in one power plant,the causes resulting in misplacement and its influence upon thrust on the port of said main steam valve have been analysed,and disposal measure,i.

Supervisory control of welding quality of main steam piping made of A335 P91 steel in thermal power plants has ensureed the welding quality.

In a power plant, water is found accumulated in main steam piping of the SIEMENS made 660 MW steam turbine after shutdown,it even leads to water running into the steam turbine.

Based on the experiment and theoretical analysis, the residue life of the main steam piping made of heat resistance steel 12CrlMoV was estimated after the piping had been used for 126691 hours.

To protectthe safety of main steam pipe,the formula of stress in elbow of main steam pipe is derivated with mechanical theory and ultilizing the formula 0f stress-strain gains the farmula of creep.