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    When soldering galvanized iron, the first step is to prepare the surface properly. This may involve cleaning the area to remove any corrosion, dirt, or impurities that could affect the bond. It's also essential to remove a small portion of the zinc coating at the soldering point to facilitate a better connection between the solder and the base metal.


    However, these couplings are not suitable for high-pressure or high-temperature applications where a secure seal is crucialplain end pipe coupling. In such cases, other types of couplings, like flanged or threaded, would be more appropriate. Moreover, plain end pipe couplings may not provide the same level of vibration isolation as other couplings, which could be a concern in industrial machinery or equipment prone to mechanical vibrations.