By material

Pipe couplings can be made of many materials, common materials are cast iron (include ductile iron and grey cast iron), steel (include carbon steel and stainless steel), PVC, PP, PE, FRP, Brass and copper.

Cast iron couplings have high strength to withstand high pressure, strong and wear-resistant , corrosion resistance, heat resistance, stable dimensions , good sealing performance, low price, fast and simple production, so it is widely used in water supply, sewage, oil and other pipelines, can be used to connect Ductile iron, PVC, HDPE, Steel, AC, GRP etc most pipes.

Steel pipe Couplings have high tensile strength and hardness, suitable for high-pressure and high-temperature environments. It has lower ductility compared to ductile iron pipe coupling but provides higher strength in structural applications. Therefore, it is widely used in petroleum and natural gas, chemical processing, power generation, and industrial pipeline systems. It is suitable for high-pressure, high-temperature environments, and applications that require high mechanical strength.

PVC coupling made of polyvinyl chloride (PVC), low cost, lightweight, and corrosion-resistant.Typically used in low-pressure and non-high-temperature environments.However, compared to metal pipe couplings, PVC couplings have lower strength and are not suitable for high-pressure or high-temperature applications. They are prone to failure under extreme conditions. They have poor UV resistance and can age and become brittle when exposed to sunlight for long periods.mainly used in water supply and drainage systems, irrigation systems, and chemical pipelines.

PP Coupling  is corrosion resistance, lightweight, good temperature resistance, wear resistance, ease of installation, and non-toxic, so it is widely used in the chemical, water treatment, agricultural irrigation, food and beverage, pharmaceutical, cooling systems, and electronics industries . In these areas, PP couplings provide an economical, efficient, and reliable solution for pipe connections.

PE coupling is widely used in the water supply, drainage, natural gas transmission, agricultural irrigation, industrial transportation, communication cable sheathing, and ground source heat pump systems because of its corrosion resistance, lightweight, good flexibility, low-temperature resistance, non-toxic and environmentally friendly properties. However, its low temperature resistance and strength, as well as its sensitivity to ultraviolet light, are its main disadvantages. In the appropriate application scenario, PE couplings provide an economical, efficient, and reliable solution for pipe connections.

FRP couplings are widely used in the chemical, marine engineering, oil and gas, municipal water supply and drainage, power, food and pharmaceutical industries due to their high strength, lightweight, corrosion resistance, temperature resistance, insulation, and aging resistance. However, the disadvantages of its high cost, lower mechanical properties than metal, complex connection, and large thermal expansion coefficient need to be considered in design and use. In the appropriate application scenario, FRP pipe couplings provide a long-lasting and reliable solution for pipe connections.

Brass pipe couplings are widely used in water supply, gas supply, air conditioning and refrigeration, industrial equipment, ships, sanitary equipment, and electrical connections due to their corrosion resistance, high strength, high and low temperature resistance, wear resistance, antibacterial properties, and conductivity and thermal conductivity. However, the disadvantages of its high cost, heavy weight, and possible lead content need to be considered in design and use. In the appropriate application scenario, brass pipe couplings provide a reliable and durable connection solution.

Copper pipe couplings are widely used in water supply, HVAC, gas transmission, medical equipment, industrial equipment, electrical equipment, and solar and geothermal systems due to their excellent corrosion resistance, high strength, good thermal and electrical conductivity, antibacterial properties, flexibility, and high-temperature resistance. However, the disadvantages of its high cost, heavy weight, and ease of theft need to be considered in some applications.