What materials are commonly used in union and coupling?

In mechanical engineering, union and coupling are used to connect pipes, shafts, or other components. The commonly used materials for these fittings include: 1. Metals Steel : Offers high strength and durability, commonly used in heavy-duty applications. Stainless Steel : Resistant to corrosion, ideal for applications involving water and chemicals. Brass : Good corrosion resistance and machinability, often used in plumbing applications. Aluminum : Lightweight and resistant to corrosion, suitable for less demanding applications. 2. Plastics PVC (Polyvinyl Chloride) : Commonly used in plumbing; lightweight and resistant to chemicals. CPVC (Chlorinated Polyvinyl Chloride) : Higher temperature resistance than PVC, used in hot water applications. Polypropylene : Chemical resistant and used in various industrial applications. 3. Rubber and Elastomers Used in flexible couplings and seals to absorb vibrations and accommodate misalignment. 4. Composite Materials ...