In nuclear facilities, connections ensure structural integrity and containment:
Leak-Tight Welding:
Electron-beam welded H-beams (HW300×300) achieve a leak rate ≤10⁻⁹ Pa·m³/s, critical for reactor containment. France's EPR plants use this method for 100% weld integrity.
Seismic-Resilient Joints:
Self-centering H-beam connections with shape memory alloys restore 95% of original alignment after earthquakes. Japan's nuclear reactors adopt this tech to withstand M9 tremors.
Fireproofed Fasteners:
Intumescent-coated HSFG bolts maintain 80% strength for 180 minutes under fire, protecting auxiliary buildings. China's HPR1000 plants comply with IAEA safety standards using these connections.