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What preparations should be made before welding zirconium fittings?

1、 Materials

1. The construction site of zirconium fittings should be equipped with a fixed welding material warehouse or a flowing welding material warehouse that meets the requirements.

2. The welding wire used should have a quality certificate or material qualification certificate.

What preparations should be made before welding zirconium fittings Jpg

Before using the welding wire, acetone or alcohol should be used to remove surface grease and other impurities. It is strictly prohibited to use Class I chlorinated hydrocarbons as degreasing solvents. After cleaning, it should be used up within 30 minutes. Otherwise, it should be cleaned again before use.

2、 Protecting argon should ensure the purity of the argon used, which is quite important.

3、 Machinery

The welding machine for zirconium fittings should be a specialized argon arc welding machine with a high-frequency arc ignition device, and equipped with a remote control current device and a water cooler. Tools such as welding wire cylinder, planer (surface welding of stainless steel layer), stainless steel wire brush, file, etc. should be fully prepared and used with special tools, and regularly degreased and cleaned. Small flashlights, endoscopes, misalignment detectors, contact thermometers, and air coolers (if available on-site for air cooling) should also be equipped.

4、 Working conditions

Welders of zirconium fittings should hold ASME 1X certification. Try to weld in the indoor prefabrication plant. If installed on site, regardless of the environmental conditions, a wind shelter should be erected. If the ambient temperature is below 15 ℃, it should be preheated to above 15 ℃ before welding, and the distance between the welding machine and the welded part should not exceed 5m.

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