A Storz coupling is a quarter-turn internal lug coupling, easy to connect to each other by the force of lugs which are on the inside of the coupling. Storz coupling is widely used by fire services worldwide and was invented for this purpose by Guido Storz in 1882. It is commonly used on fire hoses to connect to fire hydrants in western Europe, esp. Denmark, Germany, Austria, Switzerland, Sweden, and the Netherlands. In some industry usage like agriculture and irrigation, it can be casting made for general hose connection and pressure undertake. However if it is used in firefighting which is rather demanding, a forged artcraft is always demanded to guarantee the safety and duration of the couplings. As the metal is shaped during the forging process, its internal grain deforms to follow the general shape of the part. As a result, the grain is continuous throughout the part, giving rise to a piece with improved strength characteristics. Compression type test is thus carried out to check t