19400 Sets of M30 Tunnel Segment Bolts Supplier for Nansha-Zhuhai (Zhongshan) Intercity Railway
In 2025, Anyang Railway Equipment Co., Ltd. will supply 194,700 sets of 6.8 grade M30 tunnel segment bolts to the Nansha-Zhuhai (Zhongshan) Intercity Railway Project.
China Communications Construction Company Limited (CCCC) Nansha-Zhuhai (Zhongshan) Intercity Railway (Wanqingsha-Xingzhong Section) and Synchronous Implementation Project Construction General Contracting NZZ-1 Section 2 Segment Bolt Project.
In 2025, Anyang Railway Equipment Co., Ltd. will supply 194,700 sets of 6.8 grade/M30 tunnel segment bolts to the Nansha-Zhuhai (Zhongshan) Intercity Railway Project.
(1) The material and minimum tensile strength of the tunnel segment bolts shall conform to the design documents and the provisions of the current national standard GB/T3098.1 “Mechanical Properties of Fasteners – Bolts, Screws and Studs”.
(2) The mechanical properties of nuts and flat washers shall conform to the provisions of the current national standards GB/T95 “Flat Washers Class C” or GB/T 97.1 “Flat Washers Class A”.
(3) The treatment process and coating thickness of the anti-corrosion coating of the tunnel segment bolts and connectors meet the requirements of the design documents and comply with the provisions of the current national standard “Technical Conditions for Zinc Chromium Coating” GB/T18684, or the current industry standard “Powder Zinc Diffusion of Steel Components” JB/T5067, or the current national standard “Technical Requirements and Test Methods for Hot-Dip Galvanized Coating of Steel Components with Metallic Coating” GB/T13912.