冷紧口现场施工的一点经验江苏电建一公司袁俊清火力发电厂中的主汽、再热热段管道，为了减少工作状态下管系的热胀应力和对端点的推力及力矩，使管系能迅速地达到冷、热态应变的自均衡，设计了冷紧口。通俗地说，冷紧就是先将管道切去一段预定的长度，安装时再拉紧、就位... A little experience in the field construction of cold tight mouth The main steam and reheat section pipes in Yuan Junqing’s thermal power plant of Jiangsu Power Construction Co., Ltd., in order to reduce the thermal expansion stress of the pipe system and the thrust and moment to the end point under working conditions, the piping system The self-equilibrium of cold and hot strain can be quickly achieved, and the cold tight mouth is designed. In layman’s terms, cold-tightening means that the pipe is cut off for a predetermined length and tightened and placed in place during installation.