GB/T 34644-2017 in English

Interpretation of the National Standard of the People's Republic of China GB/T 34644—2017

Eddy current testing technology: This standard specifies the eddy current testing method for zirconium and zirconium alloy pipes, and is applicable to zirconium and zirconium alloy pipes with an outer diameter of 5mm~16mm.

Background of standard formulation

With the rapid development of nuclear energy, aerospace and other fields, zirconium and zirconium alloys are increasingly used in high temperature and high corrosion environments. In order to ensure the quality of materials, eddy current testing technology has become an indispensable quality control method. This standard was drafted based on GB/T1.1-2009 rules, proposed by the China Nonferrous Metals Industry Association, and managed by the National Technical Committee for Standardization of Nonferrous Metals.

Technical core and framework

Implementation suggestions and precautions

Personnel qualifications:Personnel engaged in eddy current testing must hold a qualification certificate that meets GB/T9445 or other certification requirements.

Environmental control:The detection environment should avoid interference factors such as magnetic fields, vibrations, dust and corrosive gases.

Equipment verification:Use a comparison sample to verify the equipment status every 2 hours to ensure that the signal amplitude fluctuation does not exceed 2dB.