Temporary Strainers for Pipeline Commissioning

Temporary strainers are designed for temporary installation during commissioning of new pipelines and flushing after modifications. They are typically removed once the system has been flushed clean. Install upstream of pumps and equipment to protect them from damaging particles.

Three Main Types of Temporary Strainers

1. Temporary Cone Strainers (Witch Hat Strainers)

Can be installed pointy end downstream (with flow) or upstream (against flow). Pointed upstream is better for higher velocity flows as particles collect from the outer sections inward. Pointed downstream collects particles in the center. Use cone style to maximize open area ratio when needed.

2. Temporary Basket Strainers

Oriented facing downstream (with the flow). Particles collect in the flat section. They have less volume and surface area than cone style, resulting in slightly higher pressure drop. Typical open area ratio: 100–150%.

3. Temporary Plate Strainers

A perforated plate sandwiched between pipeline flanges. Easiest to install and remove (minimal pipe spreading required). Lowest surface area (open area ratio usually <100%), so higher differential pressure than cone or basket styles.

Important Notes

All temporary strainers can be mesh lined. Mesh is always installed on the upstream side so flow pushes it against the support perforation. When ordering mesh-lined cone strainers, specify the intended orientation.

Materials: Carbon steel, 304SS, 316SS, and Monel.

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Related pages:
Temporary Cone Strainers
Temporary Basket Strainers
Temporary Plate Strainers