Mainly refers to the connection process of air conditioning refrigerant water pipes (chilled water pipes, cooling water pipes). Data center welding has extremely high standards to completely avoid water leakage.

Construction Standards:

Execution Standard: GB50462-2024 Clause 8.2, GB50242

Welding process: Argon arc welding for root pass + shielded metal arc welding for cover pass is recommended for large-diameter pipes (DN200 and above), to ensure uniform full penetration without weld defects such as incomplete penetration and weld bead

Non-destructive testing: 100% ultrasonic flaw detection shall be carried out on welds of chilled water pipelines, and the quality shall not be lower than Grade I

Anti-corrosion treatment: Weld areas with damaged galvanized layers must be painted with anti-rust paint for anti-corrosion

Pressure test: Hydraulic pressure test must be carried out after pipeline installation, and thermal insulation construction can only start after the test is qualified

Acid pickling and passivation: The pipeline system shall be subjected to circulating acid pickling and passivation after installation to improve corrosion resistance