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China Tunnel Segment Bolts Manufacturer for Shenzhen Metro Line 7

Anyang Railway Equipment Co., Ltd(AT) supplied 59,752 curved tunnel connecting bolts to the east extension of Shenzhen Metro Line 7 in 2022, with M27 arc length 545mm and R360mm.The surface of the segment

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Shenzhen Metro line 7  is a subway line in Shenzhen, Guangdong Province, China. It opened for operation on October 28, 2016, and its logo color is dark blue. The total length of the east extension of Shenzhen Metro Line 7 is about 2.45 km.

Anyang Railway Equipment Co., Ltd(AT) supplied 59,752 curved tunnel connecting bolts to the east extension of Shenzhen Metro Line 7 in 2022, with M27 arc length 545mm and R360mm.The surface of the segment tunnel bolts are treated with hot dip galvanizing. The circumferential bolts and the longitudinal bolts meet “Hexagon head bolts–Full thread” (GB/T5783-2000), the mechanical properties of the ring tunnel bolts are grade 6.8.

  1. The mechanical properties of the nuts are grade 6, the dimensions and technical data meet “Hexagon nuts”(GB/T 6170-2000).
  2. The flat washer are treated with hot dip galvanizing.
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