This standard specifies the inspection parts, methods, assessment procedures and rating standards for graphitization of carbon steel components in thermal power plants. It is applicable to main steam pipes, tees and other components made of carbon steel that have been in high temperature for long periods of time and have graphitization. Inspection and assessment work. The inspection and assessment of graphitization of other carbon steel high-temperature thermal equipment components and 0.5Mo steel components can be carried out by reference.
DL/T 786-2001 history
2001DL/T 786-2001 Standard of inspection and estimating carbon steel graphitiaztion