A stainless steel sanitary union fitting is a  component used to connect pipes. Stainless Steel unions are fittings used to ensure that pipelines can be disconnected in a practical way without being cut. Stainless Steel Sanitary Union are so named because they are loosened and tightened with a half-moon shaped wrench called a crescent wrench.Sanitary unions connect two pipes or tubes in a hygienic system. They ensure a secure, leak-free connection while maintaining cleanliness and preventing contamination. Components of a union fitting include : Male Ferrule, Liner Ferrule and a Gasket. These fittings are typically made from corrosion-resistant stainless steel (such as 316L or 304) to withstand harsh conditions.