How to Select a Pipeline Strainer

May. 27, 2024

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How to Select a Pipeline Strainer

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How to Select a Pipeline Strainer

Three Criteria for Proper Pipeline Strainer Selection

Selecting the best pipeline strainer is crucial for ensuring the longevity of your piping system and improving product or process quality while minimizing maintenance requirements.

Three Criteria for Proper Pipeline Strainer Selection

Choose the proper strainer configuration
Identify critical design criteria
- Select the materials of construction
- Determine the correct particle retention size
- Choose a strainer size based upon fluid velocity and differential pressure
Identify installation space constraints

Strainer Configuration

Several basic types of strainers exist, so the first step is to determine which style will work best for your application.

Typically applied when the amount of particulate to remove is small, Y strainers have less holding capacity compared to other designs. They are commonly used when frequent cleaning isn't necessary, implying the particles removed consist of harder, coarse materials. These strainers can be installed both horizontally and vertically with downward flow orientation.

Simplex strainers are used for batch processes or when the process can be shut down for cleaning. They are the most common type of strainer, designed with oversized elements that are easily accessed and cleaned.

Duplex designs have two elements, allowing for cleaning without shutting down the process. One chamber remains in service while the other is isolated using a manually operated diverting valve. The valve designs range from several ball or butterfly valves to single actuator-linked valves.

For applications where manual cleaning is frequent or not convenient, automatic strainers are used. These strainers purge accumulated particulate via differential pressure, using a small portion of the filtered fluid during backwashing, which can last from one second to a few minutes.

Temporary strainers, referred to as cone or basket strainers, are used for the start-up of fluid systems to remove construction debris. They are typically removed before production.

Pipeline Strainer Design Criteria

Pipeline strainers can be custom fabricated to have multiple connections and ports, made from exotic alloys, with custom coatings to meet specific design criteria involving differential pressure, flow velocity, and particle holding capacity.

Materials of Construction

The best practice is to provide a strainer made of the same material as the pipeline, especially when dealing with extreme temperatures or corrosive fluids. Options include exotic alloys, linings/coatings, and engineered non-alloys. Each configuration will have different element designs and flow characteristics.

Particle Retention Size

Pipeline strainers protect downstream equipment or processes from particulate. The acceptable level of particle size and the performance tolerance must be defined. Pipeline strainers are used for macrofiltration applications with nominal retention efficiency.

Pipeline strainers should not be used for microfiltration applications requiring specific efficiencies. It is common to set the element retention of pipeline strainers to be 1/4 to 1/3 of the maximum accepted particle size to avoid over-filtering, which increases cleaning frequency.

Relative element holding capacity is estimated by the ratio of open area to the cross-sectional area of the inlet pipe, which varies from 2:1 to 6:1 depending on the strainer design.

We provide free fluid testing to determine particle size range and concentration for critical applications. This helps ensure the strainer or filter is properly sized.

The target fluid velocity through a pipeline strainer ranges from 3 to 8 FPS, with more viscous fluids operating at the lower end. Differential pressure increases exponentially due to particulate accumulation. Sizing guidelines strive for an initial clean differential pressure of ≤ 2 PSI and prompt element cleaning after a 5 PSI increase.

Always determine the strainer's pressure class based on the highest possible pressure and temperature.

Physical Location

Access to the strainer element should be safe, ergonomically accessible, with proper clearances for removing the element. Custom fabricated strainers can facilitate various piping orientations and minimize the pipeline above grade.

Selecting the proper pipeline strainer involves many criteria besides pipeline size, particle size, and material of construction. Our inquiry forms prompt for necessary design criteria. Proper selection of pipeline strainers ensures optimal process conditions while minimizing labor, enhancing safety, and reducing operating costs.

Tips for Choosing the Best Y Strainer

A Y strainer is a vital component in various industrial applications, designed to ensure the smooth and uninterrupted flow of liquids and gasses while preventing the entry of unwanted particles and debris. This specialized type of strainer derives its name from its distinctive shape, which resembles the letter "Y." Installed in pipelines, the Y strainer acts as a filtration system, effectively removing impurities such as dirt, sediment, and larger particles from the fluid or gas passing through it. By capturing these contaminants, the Y strainer helps protect downstream equipment, such as pumps, valves, and meters, from potential damage or clogging, thereby promoting the overall efficiency and longevity of the system. Its versatility, reliability, and cost-effectiveness make the Y strainer an indispensable tool for maintaining optimal flow and ensuring the integrity of industrial processes across various sectors, including chemical, oil and gas, water treatment, and manufacturing industries.

But how do you choose the best Y strainer for your application?

Size and Flow Capacity: Consider the size and flow capacity of the Y strainer to ensure it can handle the expected volume and flow rate of the fluid or gas in your system. Select a strainer with an appropriate pipe size and flow capacity to prevent any flow restrictions or inefficiencies.
Material of Construction: Evaluate the material of construction based on compatibility with the fluid or gas being filtered and the environmental conditions. Common materials include stainless steel, brass, and PVC. Ensure the selected material is resistant to corrosion, erosion, and chemical reactions to guarantee long-term durability.
Mesh Size: The mesh size of the strainer determines the level of filtration. Consider the size of particles or debris you need to remove from the fluid or gas and choose a Y strainer with an appropriate mesh size. Finer mesh sizes offer higher filtration efficiency but may require more frequent cleaning or maintenance.
End Connections: Determine the type of end connections required for your specific application, such as threaded, flanged, or socket-weld connections. Ensure that the Y strainer's end connections are compatible with the existing piping system for seamless integration.
Pressure Rating: Evaluate the pressure rating of the Y strainer to ensure it can withstand the operating pressure of your system. Choose a strainer that offers a sufficient pressure rating with a safety margin to prevent any potential failures or leaks.
Ease of Maintenance: Consider the ease of maintenance and cleaning procedures for the Y strainer. Look for features like a blowdown valve or quick-release mechanism that facilitate easy removal of trapped debris for efficient maintenance.
Certifications and Standards: Check if the Y strainer meets industry standards and certifications, such as ANSI, ASME, or ISO. Compliance with these standards ensures the strainer's quality, performance, and reliability.
Supplier Reputation: Choose a reputable supplier or manufacturer known for delivering high-quality Y strainers. Research customer reviews, testimonials, and industry reputation to ensure you are getting a reliable product from a trusted source. forged steel valves.
Cost Considerations: Compare prices and consider the overall value for money. Balance the upfront cost with the long-term benefits and durability of the Y strainer. Remember that investing in a high-quality strainer may reduce maintenance costs and prevent costly downtime in the future.
Consultation: If uncertain, consult with industry experts or consult the manufacturer’s technical support team for guidance on selecting the best Y strainer for your specific needs and application requirements.

Conclusion

Selecting the best Y strainer for your application requires careful consideration of several key factors. By paying attention to size and flow capacity, the material of construction, mesh size, end connections, pressure rating, ease of maintenance, certifications and standards, supplier reputation, cost considerations, and seeking expert advice when needed, you can make an informed decision. Choosing the right Y strainer will ensure optimal filtration, protect downstream equipment, and promote the efficiency and longevity of your industrial processes. So, take your time, evaluate your specific requirements, and invest in a high-quality Y strainer that meets your needs. By doing so, you'll have peace of mind knowing that your system is well-protected and operating at its best.

How to Select a Pipeline Strainer