1. Convenient socket alignment (easy alignment, no spot welding required)
2. Low risk of leakage (reduced leakage caused by loose connection parts)
3. Control of weld metal flow (metal will not flow into the tube hole)
4. Reduced installation cost (loose size requirements, no need for complex high-level processing)
1. The importance of expansion gap (the reserved 1.6 mm expansion gap, too small a gap will not allow free expansion, too large a gap will cause loosening)
2. Corrosion risk (the reserved gap will cause water and other corrosive substances to be retained, accelerating corrosion)
3. Applicability issues in the food industry (the parts may not be fully melted during welding, which is easy to breed bacteria and pose a health hazard
