Slotted Pipe

Slotted pipe is a steel pipe with precision-cut openings distributed along the pipe body to allow controlled fluid flow while preventing unwanted solids from entering the system. It is widely used in water wells, drainage systems, filtration equipment, dewatering projects, and selected oil and gas applications.

Unlike standard pipes, slotted pipes are engineered according to specific flow requirements. Slot width, slot pattern, open area ratio, and base pipe material can all be customized to achieve the desired filtration performance and structural strength.

With extensive export experience serving global industrial buyers, we provide slotted pipes manufactured to customer drawings or project specifications, helping EPC contractors, distributors, and end users reduce maintenance costs and improve system efficiency.

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Slotted Pipe Specification Table

These parameters define the filtration capability and structural integrity of the pipe.

Available Base Pipe Standards

The slotted section is processed from qualified base pipes. Depending on project requirements, the following standards can be supplied:

Note: The applicable standard depends on the selected base material and end-use application.

Slotted Pipe Size Chart

Slotted pipes are usually manufactured using API casing as the base pipe. Below are the common outside diameter (OD) specifications.

Types of Slotted Pipe

By Slot Profile:

Straight Slots: Width is uniform from the exterior to the interior. Most cost-effective, suitable for coarse sand environments.

Keystone / V-shape Slots: Wider on the inside than the outside; features self-cleaning properties to prevent plugging.

By Slot Pattern:

Staggered Pattern: Slots are offset across adjacent rows. This is the most recommended pattern for maintaining maximum pipe strength.

Parallel Pattern: Slots are aligned in longitudinal rows; simpler to manufacture.

Gang Pattern: Slots are clustered in groups along the pipe body.

Features of Slotted Pipe

High Mechanical Strength: Since slots are cut into a solid pipe body, the pipe retains most of its original tensile, compressive, and torsional capacity.

Laser Precision: CNC laser cutting ensures smooth edges, no burrs, and minimal dimensional tolerances (±0.05mm).

Self-Cleaning Design: The Keystone (trapezoidal) slot profile prevents sand grains from becoming lodged, reducing the risk of plugging.

Cost-Effectiveness: Compared to wire-wrapped screens, the manufacturing cost is significantly lower, making it an economical choice for large-scale use.

Customization: Slot width, length, and pattern density can be customized based on the particle size distribution of the formation sand.

Applications of Slotted Pipe

Oil and Gas Sand Control: Used in low-pressure or medium-production wells to prevent formation sand from damaging downhole pumps.

Horizontal Well Completion: Due to its high mechanical strength, it is ideal for deployment in long-reach horizontal well sections.

Water Well Extraction: Acts as a filter in groundwater projects to ensure pumps are not worn down by sand and grit.

Geothermal Development: Filters impurities and rock particles from high-temperature fluids in geothermal wells.

Thermal Recovery (SAGD): Capable of withstanding high-temperature and high-pressure fluid filtration environments.

Slotted Pipe Manufacturing Process

1. Raw material verification.
2. Base pipe dimensional inspection.
3. Precision slot cutting according to approved drawings.
4. Deburring and surface finishing.
5. Dimensional verification.
6. Final inspection and documentation.
7. Packaging and shipment.

Slotted Pipe Quality Assurance and Inspection

Quality consistency is critical for filtration performance and service life.

Our inspection capabilities may include:

• Raw material certificate verification.
• Chemical composition analysis.
• Dimensional inspection.
• Slot width and spacing measurement.
• Visual examination.
• Positive Material Identification (PMI) when required.
• Ultrasonic Testing (UT) for applicable projects.
• Hydrostatic testing when specified by customers.
• Third-party inspection by SGS, BV, TÜV, or other nominated agencies.

Inspection scope can be customized according to project specifications.

Slotted Pipe Packaging and Delivery

Standard Export Packaging

• Steel bundles with lifting straps.
• Waterproof wrapping.
• Wooden cases for small quantities.
• End protection when required.

Shipping Terms

• EXW
• FOB
• CFR
• CIF
• DDP

Delivery Time

Standard sizes are typically delivered within 2–4 weeks, while customized products depend on slot configuration, quantity, and inspection requirements.

Why Work With Us?

We understand that overseas buyers are not simply purchasing pipes-they are managing project schedules, quality risks, and procurement costs.

Our team supports customers through:

• Technical consultation before ordering.
• Material selection recommendations.
• Drawing review and manufacturability evaluation.
• Inspection coordination.
• Export documentation preparation.
• Global logistics support.
• Responsive after-sales service.

This approach has helped distributors, EPC contractors, drilling companies, and industrial end users source slotted pipes with greater confidence and reduced procurement risk.

Slotted Pipe factory

Slotted Pipe test equipments

Slotted Pipe certificate

FAQ

What testing is performed on Slotted Pipe to ensure quality?

Slotted screens must undergo the following key quality tests prior to factory release and installation to ensure reliable performance:
CCTV endoscopic inspection: Examine the slots for uniformity, and check for burrs, blockages, or cracks.
Dimensional and tolerance inspection: Ensure slot width, spacing, and other dimensions meet design specifications, with tolerances typically controlled within ±0.05 mm.
Pressure testing: Verify the tube's sealing integrity and resistance to damage under high pressure.
Material testing: Confirm material compliance through metallographic, hardness, and compositional analysis, ensuring sufficient strength and corrosion resistance.
Anti-corrosion coating inspection: Use an electric spark holiday detector to assess coating integrity and prevent pinholes or damage.

What are the different shapes and patterns of slots in Slotted Pipe?

The slot shape and arrangement of slotted screens are customized according to engineering requirements to balance fluid permeability and structural strength.
Common shapes:
Rectangular slot: Most commonly used, provides good sand exclusion and large flow area.
Trapezoidal slot: Narrower inside and wider outside, or vice versa, less prone to clogging, suitable for high-sand-content environments.
V-shaped slot: Guides fluid convergence, improving inflow efficiency in horizontal wells.
Helical slot: Promotes fluid rotation, enhancing sand control stability.
Common arrangements:
Axial parallel: distributed linearly along the tube axis, suitable for vertical wells, low cost.
Spiral arrangement: distributed in a helical pattern, ensures uniform stress distribution, suitable for horizontal and highly deviated wells.
Staggered arrangement: multiple rows offset from each other, avoids stress concentration, improves compressive strength.

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