This project is an arched structure of Anyang coal storage shed with steel space frame. The total length is 558 meters, the span is 77 meters, and the total height is 49 meters.
The space frame structure should be strictly in accordance with the industry standard "Steel Grid Bolt Ball Joint" JG/T10-2009. The steel material must meet the design requirements, and according to the current national standard "Steel Structure Engineering Construction Quality Acceptance Specification" (GB50205-2020) zero All components are manufactured in the factory, and are tested by the factory according to mechanical properties and chemical analysis, and can be used only when they meet the standards. The surface of the grid steel structure needs to be shot blasted and rust removed, with a grade of Sa2.5.
The material of the steel pipe shall comply with the Q235B steel specified in GB700 of "Carbon Structural Steel" and shall comply with the welded steel pipe specified in GB3092 or the No. 20 seamless steel pipe specified in GB3087.
The bolt ball is forged with No. 45 steel specified in GB699, and the surface should be smooth, no cracks, no overburning, and no pitting.
The high-strength bolts are made of the materials specified in GB/T16939-1997 of "High-strength bolts for steel grid bolts and ball joints". The finished product does not allow quenching cracks of any depth or any length in any part. High-strength bolts for bolted ball joints "GB/T16939-1997" stipulated in the grade requirements, the surface hardness should reach HRC32~36, the thread should meet the 6g level in "General Thread Tolerance and Fit" GB197, the surface should be blackened and coated with anti-rust Oil.
The material of the sealing plate and the cone head shall comply with the Q235 steel specified in GB700, and the material of the sleeve shall comply with the Q235 steel specified in GB700 or the 16Mn steel specified in the "Technical Conditions for Low Alloy Structural Steel" GB1591 or the "High Quality Carbon Structural Steel Steel". No. 45 steel specified in GB699, the appearance of sealing plate, cone head and sleeve shall not have cracks, over-burning and scale.
Post time: Mar-30-2022