When argon arc welding is used to weld austenitic stainless steel, there are various accidental or inevitable factors that cause some poor soldering defects. Analysis of the causes and remedies are a means to improve the yield.

The reporter learned from Qinghai Electric Power Maintenance Company that the company successfully applied X-ray non-destructive testing technology to test the 232 tensile clamps of the 29-kilo-resistant tower of the Qinghai-Tibet Networking Project.

Austenitic stainless steel is one of the most widely used metal materials in petrochemical production. Its welding performance is good, but it is easy to produce many problems in the welding process.

Most of the pressure vessels use low-alloy or carbon steel such as 16MnR, so that the equipment has the characteristics of coercive force and low remanence. Therefore, only continuous method can be used when detecting equipment defects.

From the perspective of non-destructive testing of pipe weld quality, the following aspects should be considered in the design phase, so as to be more conducive to the implementation of inspection work and the improvement of project quality.

Penetrant testing is used to inspect surface opening defects (raw materials, processes, uses) of metals (steel, heat resistant alloys, aluminum alloys, magnesium alloys, copper alloys) and non-metallic (ceramic, plastic) parts or materials, such as cr