Standard No.:	JB/T 8888-1999
Chinese Name:	环芯法测量汽轮机、汽轮发电机转子锻件 残余应力的试验方法
English Name:	Test method for measuring residual stresses by the ring-core method in rotor forgings for turbine and generator
Professional Classification:	J32 Forging and pressing
Professional Classification:	JB Professional Standard - Machinery
ICS Classification:	77.140.85 Iron and steel forgings
Issued by:
Issued on:	1999-06-28
Implemented on:	2000-01-01
Status:	ABOLISHED
Replace By:	JB/T8888-2018
Replace By Date:
Language:	English
File Format:	PDF
Word Count:
Price(USD):	please email coc@codeofchina.com for quotation
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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