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What are the main materials of medium and low pressure pipe fittings flanges?

**Medium and low pressure pipe fittings flanges** are mainly made of carbon steel, cast iron, and stainless steel. Carbon steel is a common flange material, with good corrosion resistance, mechanical properties, and weldability, able to withstand high pressure and temperature, so it is often used as a manufacturing material for medium and low pressure pipe fittings flanges.