Chemical Process Pump Material Selection
The selection of materials for
chemical process pumps depends on a variety of factors, including the type of chemical being handled, the temperature and pressure of the system, and the mechanical and chemical properties of the materials. Here are some common considerations for selecting materials for chemical process pumps:
Chemical compatibility: The materials used in chemical process pumps must be compatible with the chemicals being handled. This includes resistance to chemical attack and degradation, as well as compatibility with the pH and concentration of the chemical.
Temperature and pressure: The temperature and pressure of the system can also affect material selection. Materials must be able to withstand high temperatures and pressures without deformation or failure.
Mechanical properties: The mechanical properties of materials, such as strength, stiffness, and wear resistance, are important considerations for pump components that are subject to mechanical stress, such as impellers, shafts, and bearings.
Corrosion resistance: Corrosion can cause degradation and failure of pump components over time. Materials with high corrosion resistance, such as stainless steel or plastic, may be preferred for corrosive environments.
Sealing materials: Sealing materials, such as gaskets and O-rings, must also be selected carefully to ensure compatibility with the chemical being handled and to prevent leaks and contamination.
Common materials used in chemical process pumps include:
Stainless steel: Stainless steel is a corrosion-resistant material that is commonly used in chemical process pumps.
Plastics: Plastics such as polypropylene, PVC, and PTFE are commonly used in chemical process pumps due to their high chemical resistance.
Ceramic: Ceramic materials are used in applications where high wear resistance and high hardness are required.
Hastelloy: Hastelloy is a family of corrosion-resistant alloys that are commonly used in chemical processing.
Titanium: Titanium is a corrosion-resistant material that is used in high-temperature and corrosive applications.
The selection of materials for chemical process pumps requires careful consideration of the chemical, mechanical, and environmental factors involved, and should be performed by qualified engineers with experience in chemical process engineering.