What Are The Differences Between Copper Pipe Fittings, Malleable Iron Pipe Fittings, And PVC Pipe Fittings?

by | Dec 21, 2023 | News

Fittings typecopper pipe fittingsmalleable iron pipe fittingsPVC pipe fittings
IntroductionCopper pipe fittings are mainly used to connect copper pipes. They are divided into refrigeration pipe components and plumbing pipe fittings.The cast iron formed by pouring molten iron with a certain chemical composition into a white blank and then annealing it has high strength, plasticity and impact toughness, and can partially replace carbon steel.PVC can be divided into soft PVC and hard PVC. Soft PVC is generally used for floors, ceilings and the surface of leather. However, because soft PVC contains plasticizers (this is also the difference between soft PVC and hard PVC), its physical properties are poor (for example, water pipes need to withstand a certain water pressure, and soft PVC is not suitable for use), so its scope of use is limited. Rigid PVC does not contain plasticizers, so it is easy to shape and has good physical properties, so it has great development and application value.
MaterialBrass fittings are made from an alloy of copper and zinc, the proportions of which vary depending on the properties required.Malleable cast iron pipe fittings are made from cast iron that undergoes a heat treatment process to impart malleability.PVC (polyvinyl chloride) pipe fittings are made from a thermoplastic polymer.
feature Corrosion resistance: Brass has good corrosion resistance and is suitable for various environments.Temperature resistance: Brass has medium temperature resistance and is suitable for a certain temperature range.  Corrosion Resistance: Has moderate corrosion resistance and usually requires external coating for protection.Threaded connections: Malleable iron fittings often use threaded connections, providing a secure connection. Lightweight: PVC is lightweight, making installation easier and more cost-effective.Low Cost: PVC fittings are generally cheaper compared to metal alternatives.
advantageIt is easier to bend than ordinary metals, has good toughness and ductility, and has excellent resistance to vibration, impact and frost heaving.Its mechanical properties are higher than gray cast iron, and its plasticity and toughness are good. Among them, black-core malleable cast iron has higher plasticity and toughness, while pearlite malleable cast iron has higher strength, hardness and wear resistance.The bonding method can be used to connect PVC pipe fittings, which is simple to construct and easy to operate. It has excellent corrosion resistance against inorganic acids, alkalis, salts and other substances, so it is more suitable for industrial sewage discharge and transportation.
shortcomingBrass fittings can be more expensive compared to some other materials, such as PVC or certain types of plastic.Malleable cast iron cannot be forgedThe thickness is relatively thin, and the performance such as pressure resistance and high temperature resistance is relatively poor.
applicationWater system: Pipes typically used in water supply systems.Gas Pipes: Brass fittings can be used in gas distribution systems.Water Distribution: Commonly used in water supply and distribution systems.Oil and Gas Industry: Pipelines used to transport oil and gas.Water Supply: Widely used for residential and commercial piped water supply.Irrigation System: Commonly used for agricultural irrigation purposes.
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