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M30 tunnel segment bolts to Xiamen Metro Line 4
In 2018, Anyang Railway Equipment Co., Ltd. provided M30 tunnel segment bolts to Xiamen Metro Line 4
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Xiamen Metro Line 4 is a subway line under construction by Xiamen Metro, with a total length of 71.23 km.
In 2018, Anyang Railway Equipment Co., Ltd. provided M30 tunnel segment bolts to Xiamen Metro Line 4. The bolt grade was 8.8, the nut mechanical performance grade was 8.0, and the washer mechanical performance grade was at least Hv=200.
The segment connecting bolts, nuts and washers are all made of chrome-free zinc-aluminum coating for anti-corrosion treatment.
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