Cast iron pipe is a type of tubular material made from cast iron, commonly used in water supply, drainage, and gas distribution systems. These pipes come in various forms, including straight pipes and fittings, and are known for their durability and strength. The manufacturing process involves casting, and the labor involved is relatively low compared to other materials. There are two main types based on the casting method: continuous cast iron pipes and centrifugal cast iron pipes. Centrifugal cast iron pipes can further be categorized into sand-type and metal-type, depending on the mold used.
Cast iron pipes are also classified by material, with gray cast iron and ductile iron being the most common types. Gray cast iron is typically used for less demanding applications, while ductile iron offers better tensile strength and is often preferred for high-pressure systems. In terms of joint types, there are several options available, such as flexible joints, flanged joints, self-anchored joints, and rigid joints.
Flexible cast iron pipes use rubber rings for sealing, providing a leak-proof connection that allows for some movement. Flanged joints involve connecting pipes using flanges and rubber gaskets, offering a secure and adjustable connection. Rigid joints, although once widely used, have largely been replaced due to their inflexibility. They usually feature a socket in the pipe where another section is inserted and sealed with cement, which can lead to cracking over time. Today, more advanced and durable joint systems are preferred for long-term reliability and ease of maintenance.
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