The pipe joint is mainly composed of iron, carbon and silicon alloy components and has a variety of beneficial properties. It has high strength, excellent toughness, excellent plasticity and impressive processability. These properties make it a valuable component in a variety of applications, providing durability and reliable performance. Its composition ensures it can withstand rigorous conditions, providing seamless connections between pipes while maintaining structural integrity. The coupling is malleable iron pipe fitting with female National Pipe Taper (NPT BS) threads on both ends to connect two male pipes going in the same direction.The coupling has BS NPT threads for creating tighter seals than straight threads.It is made of malleable iron, which has high tensile strength, and a galvanized finish that resists rust in water, air, and steam applications.This class 150 fitting meets standards ASTM A-197, ASME B 1.20.1, and ASME B 16.3 for quality assurance. Class is a standard relating to tolerance, construction, dimension, and wall thickness, but it is not a direct measurement of maximum working pressure. Galvanized Malleable Iron Coupling, for DIY Pipe Furniture Building and Regular Plumbing Applications Authentic iron couplings are the perfect fitting for joining two pieces of pipe together, allowing you to customize your pipe length. extensive line of pipe and fittings, including our exclusive patented fittings, are the go-to products for creating industrial home decor. These are genuine industrial pipes and fittings that will stand the test of time. You will know accessories when you hold them. Beauty and beast. Strength and style. These are real industrial pipes and fittings used for plumbing applications.