What should we do before welding zirconium fittings?

Ⅰ. Materials
1. The construction site of zirconium pipe fittings should be equipped with a fixed welding material library or a mobile welding material library that meets the requirements.
2. The welding wire used should have quality certificate or material qualification certificate.
3. Before the use of welding wire, use acetone or alcohol to remove grease and other debris on the surface, strictly prohibit the use of a chlorinated hydrocarbon as a degreasing solvent, clean up within 30 minutes after the application, otherwise it should be cleaned again before use.

Ⅱ. The protection of argon should ensure the purity of the argon used, which is very important.

Ⅲ. Machinery

The welding machine for zirconium pipe fittings shall be a special argon arc welding machine with high frequency arc starting device, and with remote control current device and water cooler. Special tools such as welding wire cylinder, planer hammer (surfacing stainless steel layer on the surface), stainless steel wire brush and file should be prepared and used, and degreasing cleaning should be carried out regularly. It should also be equipped with a small flashlight, an endoscope, a fault detector, a contact thermometer, and a chiller (if air cooling is available on site).

Ⅳ. Working conditions
Welders of zirconium pipe fittings shall hold ASME 1X certificate. Weld in indoor prefabrication plant as much as possible. If it is installed on site, regardless of the environmental conditions, a wind shield should be installed. If the ambient temperature is lower than 15 ° C, it should be preheated to more than 15 ° C before welding, and the welding machine should not be greater than 5m from the welding part.