Custom Perforated Filter Tube
A custom perforated filter tube is defined by its sheet material, thickness, hole size, pitch, pattern, diameter, seam and end details. It may function as a coarse screen, protective sleeve or support core for finer filtration media. Send a drawing so open area, strength and equipment interfaces can be reviewed together.
Perforated Tube Functions at a Glance
Coarse screening
Controlled holes retain larger particles while allowing liquid, gas or bulk material to pass.
Filter support core
A rigid body supports woven mesh or other fine media against differential pressure.
Protective sleeve
Outer perforated structure helps protect finer media from handling or mechanical impact.
Fabricated component
Tube body combined with flanges, caps, collars, handles or mounting features from a drawing.
Perforated Filter Tube Specification Checklist
Hole diameter alone is not a complete specification. Pitch, pattern, sheet thickness, unperforated margins and formed-tube dimensions should be shown together.
Mobile: swipe sideways to view every column.
| RFQ field | What to specify | Design relevance |
|---|---|---|
| Material | Alloy/grade and any required finish | Relates to corrosion, forming, welding and service environment |
| Sheet thickness | Nominal thickness and applicable tolerance | Affects rigidity, forming radius and hole feasibility |
| Hole geometry | Shape, size, pitch, pattern and orientation | Defines open area, ligament and screening behavior |
| Tube geometry | OD or ID, length, roundness and critical tolerances | Controls equipment fit and assembly clearance |
| Seam | Longitudinal joint and weld requirements | Influences structural continuity and finished geometry |
| Ends/interfaces | Open/closed ends, caps, flange, collar, thread or handle | Defines mounting, sealing and removal requirements |
Hole Size, Pitch and Open Area
Hole size controls the nominal clear opening. Pitch is the center-to-center distance between adjacent holes. Ligament is the metal remaining between openings. Their relationship affects theoretical open area and sheet strength.
Theoretical sheet open area is not automatically the same as the effective open area of a finished tube because seams, end margins, flanges and support layers may block part of the flow area.
Hole Pattern and Material Options
Round holes
A common choice for predictable spacing and general screening or support duties.
Slots and custom shapes
Orientation and ligament must be defined because elongated openings behave differently by direction.
Metal selection
Stainless steel, carbon steel or coated material can be reviewed against corrosion, forming and welding needs.
Tube, Cylinder and Fabricated Shapes
Tube and cylinder usually describe the same product family. The important distinction is the drawing: circular or non-round body, diameter, length, seam, ends and mounting features.
- Open-ended cylindrical support tubes
- Closed-end screens and strainers
- Flanged or collared components
- Square and drawing-specific perforated bodies
- Perforated support combined with fine wire mesh
Applications by Function
Coarse process screening
Retaining larger debris in liquid, gas or solids-handling equipment.
Fine-media support
Supporting woven mesh, Dutch weave, sintered or pleated media.
Equipment protection
Protective cores or sleeves around sensitive filtration layers and components.
Custom strainers
Drawing-based tubular or basket-like components with mounting and removal details.
For fine mesh media selection, review stainless steel wire mesh. For broader cylindrical products, see mesh cylinders.
Different duty: this page covers screening and filter-media support. A perforated gas sparger tube uses drawing-defined outlets to distribute gas into a process zone or liquid; its inlet conditions, hole map and distribution validation belong to a separate specification.
Perforated Tube Selection Workflow
1. Define the function
Coarse screen, support core, protective sleeve or complete strainer.
2. Specify perforation
State hole shape, size, pitch, pattern, orientation and margins.
3. Define the body
Provide material, thickness, OD/ID, length, seam and tolerances.
4. Add filter layers
Show fine mesh, support position and flow direction if a composite is needed.
5. Complete the drawing
Include ends, connections, operating conditions, quantity and required documents.
What to Include in Your RFQ
- Material grade and sheet thickness
- Hole shape, size, pitch and arrangement
- OD/ID, length and tolerances
- Unperforated margins and seam details
- Ends, flanges, caps, collars or fittings
- Fine mesh/support layers and flow direction
- Operating conditions, drawing and quantity
Photos can clarify the concept, but dimensions and critical requirements should be provided in a drawing.
Perforated Filter Tube FAQ
A perforated filter tube is formed from metal sheet with a controlled hole pattern and joined into a cylindrical or drawing-specific body. It can act as a coarse screen, protective sleeve or structural support beneath finer filter media.
State the material, sheet thickness, hole shape and size, pitch or center spacing, pattern orientation, outside or inside diameter, length, seam, edge condition, end details, tolerances, quantity and intended service.
For a 60-degree staggered round-hole pattern, theoretical open area depends on hole diameter divided by pitch. The calculation must use the actual pattern and center spacing; formed-tube geometry, margins and unperforated areas can change the effective component open area.
Usually it provides coarse screening or structural support. Fine filtration commonly requires woven wire mesh, Dutch weave or another porous medium added to the perforated body. The complete layer structure should be specified.
The terms frequently describe the same cylindrical component. Tube often emphasizes a long body or pipe-like geometry, while cylinder is broader. Selection should be based on the drawing, not the wording alone.
Drawing-based parts can be reviewed with flanges, collars, open or closed ends, caps, fittings, handles and mounting details. Critical interfaces and weld requirements should be shown on the drawing.
Request a Perforated Tube Drawing Review
Send the material, thickness, hole pattern, diameter, length, seam, ends and operating conditions. Maidong can review a perforated filter tube or support cylinder enquiry.