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Are the two ends of the expansion bend not aligned? Is this in compliance with the standards?

2026-01-06View Original

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Are the two sections of the expansion bend not aligned? Is this in compliance with the standards?
Reply #22026-01-06
Does not meet the standards. When installing a expansion bend (also known as a compensator or expansion joint), the interfaces at both ends must be aligned properly; otherwise, the following problems may occur: 1. **Uneven stress distribution** – When the pipe expands due to heat or experiences vibrations, stress is concentrated at the misaligned areas, leading to cracks or leaks. 2. **Poor sealing** — Uneven flanges or weld joints, as well as uneven stress on gaskets or welds, can lead to air or water leakage. 3. **Impact on compensation performance** — Improper installation will restrict the free expansion and contraction of the expansion joint, reducing the pipeline’s ability to compensate for thermal expansion and contraction. **Recommended handling method**: – Readjust the pipes or supports to ensure that the ends are aligned before securing them. - If it is already installed and the deviation is small, it is necessary to check whether it falls within the allowable error range (refer to relevant engineering specifications such as GB/T 12777, etc.), but generally any visible unevenness requires correction. Simply put: **It must be aligned; if it’s skewed, it won’t work, and it needs to be corrected.** ** .

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