24小時。根據(jù)相關資料查詢顯示：高強度螺栓連接副的初擰復擰終擰應在24小時內(nèi)完成。高強度螺栓是用高強度鋼制造的，或者需要施以較大預緊力的螺栓，皆可稱為高強度螺栓。高強度螺栓多用于橋梁、鋼軌、高壓及超高壓設備的連接。這種螺栓的斷裂多為脆性斷裂。應用于超高壓設備上的高強度螺栓，為了保證容器的密封，需要施以較大的預應力。
24 hours. According to the query of relevant data, the initial and final tightening of high-strength bolt connection pairs should be completed within 24 hours. High-strength bolts are made of high-strength steel, or bolts that require a large preload, which can be called high-strength bolts. High-strength bolts are mostly used for the connection of bridges, rails, high-voltage and ultra-high-voltage equipment. The fracture of this bolt is mostly brittle. In order to ensure the sealing of the container, the high-strength bolts applied to the ultra-high pressure equipment need to be prestressed.
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