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M24 Tunnel Segment Bolts for Foshan Metro Line 3
In 2018, Anyang Railway Equipment Co., Ltd(AT) provided M24 Tunnel Segment Bolts for Foshan Metro Line 3.
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Foshan Metro Line 3 is a line under construction in Foshan Metro. It belongs to urban rail transit. Foshan Metro Line 3 is expected to be put into trial operation at the end of 2022, and will be put into operation in June 2023. The project is the longest subway line in Foshan, with a line length of about 69.5 km.
In 2018, Anyang Railway Equipment Co., Ltd(AT) provided M24 Tunnel Segment Bolts for Foshan Metro Line 3.
- The segment connection bolts are made of 45#steel, and the surface of the bolts is treated with zinc chrome coating to prevent rust. The zinc chrome coating meets the requirements of “Specifications ofZinc/Chromate Coatings” (GB/T18684-2002), and the protection level is not lower than 9 after the 480h neutral salt spray test. The mechanical properties of the ring tunnel bolts are grade 5.8.
- The mechanical properties of the circumferential bolts and nuts and the longitudinal bolts and nuts are both grade 5.
- The flat washer and nut are made of 45# steel, and the chemical composition and mechanical properties of the material meet the requirements of GB/T 699.
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