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在机器修理过程中,由于温度差和各种介质的影响,螺纹联接表面会产生腐蚀,因而在拆卸螺纹联接时就显得特别困难。 若采用防腐蚀剂或另外类似作用的制品也不会总是有良好效果。若采用抗腐蚀性（有色金属）材料（例如（青铜）制造螺纹联接部件,则成品的成本又会增加,有时由于强度和另外的使用指标原因而不能采用。因此在钢制螺纹联接外,采用如下方案被认为是最合理的方案。即把由抗腐蚀（有色金属）金属（青铜）制成的外螺纹套筒过盈（例如在加热状态）地装到1个联接管上,套筒的外螺纹直径与联接管的内螺纹直径相同。详
In the machine repair process, due to temperature differences and the impact of a variety of media, the threaded coupling surface will produce corrosion, so in the removal of threaded connections is particularly difficult. It is not always good to use anticorrosive or otherwise similar products. If the use of corrosion-resistant (non-ferrous metal) materials (such as (bronze) manufacturing threaded connections, then the finished product costs will increase, sometimes due to strength and other reasons can not use index.Therefore, the use of steel thread connection The most plausible solution is considered to be the following solution: An externally threaded sleeve made of corrosion-resistant (non-ferrous metal) metal (bronze) is fitted over an adapter tube, for example in a heated state, The diameter of the external thread is the same as the internal thread diameter of the connecting pipe