The 180° socket copper U-bend fitting is made of T2 high-purity copper through precision bending forming, and is the core accessory for pipeline steering in air conditioning and cold storage refrigeration systems. Its 180° oil return bend design complies with refrigeration pipeline oil return specifications, which can effectively collect lubricating oil in the system and avoid compressor damage due to oil shortage. The socket end adopts flaring process, with inner diameter tolerance controlled within ±0.05mm, adapting to plug-in welding of copper pipes, with full solder filling and excellent sealing performance. The fitting bending radius is standardized, with the minimum bending radius ≥2.5 times the pipe diameter, ensuring smooth refrigerant flow and pressure loss ≤0.02MPa. The surface undergoes anti-oxidation treatment, resistant to humid corrosion, and has stable performance in the temperature range of -40℃ to 150℃. Applicable to pipelines of refrigeration equipment such as air c…