1 Scope
This standard specifies test methods and equipment for measuring residual stress by the ring-core method in rotor forgings for turbine and generator as well as the procedure.
This standard is applicable to determination of residual stress in various rotor forgings in JB/T 7025, JB/T 1265, JB/T 7027, JB/T 7026, JB/T 1267 and JB/T 7178 and also to that of other shaft forgings.
2 Normative References
The following documents contain provisions which, through reference into this standard, constitute provisions of this standard. At time of publication, the editions indicated are valid. All the standards will be revised, all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of the following standards are applicable.
GB/T 13992-1992 Resistance Strain Gauge
JB/T 1265-1993 Specification for Rotor and Shaft Forgings for 25 MW to 200MW Steam Turbines
JB/T 1267-1993 Specification for Rotor Forgings for 50MW to 200MW Turbine Generators
JB/T 7025-1993 Specification for Rotor and Shaft Forgings for Steam Turbine (25MW and Lower)
JB/T 7026-1993 Specification for Rotors Forgings Used below 50MW Turbine Generator
JB/T 7027-1993 Specification for Steel Forgings for Steam Turbine Rotors (300MW ~ 600MW)
JB/T 7178-1993 Specification for Rotor Forgings for 300MW to 600MW Turbine Generators
