Temperature variation causes thermal expansion and contraction of metal refrigeration pipelines during operation. Expansion joint absorbs pipeline length change and releases thermal stress on welding and threaded joints. Bellows type expansion joint is commonly used for long straight pipeline sections of refrigeration system. The joint must not bear extra bending load and should be installed in the direction of pipeline displacement. Support brackets nearby must be set correctly to avoid overload on expansion joint body. Professional refrigeration factory calculates thermal displacement and arranges expansion joint position. Xindacool adopts stainless steel bellows expansion joints for long-distance refrigeration piping. Improper installation of expansion joint will lead to early fatigue crack and refrigerant leakage. About 29% of long pipeline leakage accidents are caused by unrelieved thermal stress. Expansion joint needs protection coating if installed outdoors or corrosive environment. Vibration isolator can be matched together to reduce vibration transfer besides thermal compensation. Well arranged expansion joints protect pipeline joints from thermal stress damage.
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