A reliable mesh purchase starts with a controlled definition of construction, raw material, geometry and finished scope—not with a broad phrase such as “titanium screen,” “80 mesh” or “medical mesh.”
1. Start with Equipment Duty and Supply Scope
Record the actual function: particle retention, flow distribution, support, guarding, current distribution, electrode substrate or fabricated structure. Define media, temperature, pressure differential, velocity, electrical duty, loads, cleaning, installation and maintenance where applicable.
Opening or flow target, load/support, service environment, active area, connection and equipment interface.
Mesh only, cut profile, formed part, welded frame, tabs, surface preparation, inspection, documents and packing.
2. Separate the Mesh Constructions
| Construction | How it is formed | Primary purchase language |
|---|---|---|
| Woven mesh | Crossed titanium wires in an ordered weave | Wire diameter, aperture/count, weave, open area |
| Expanded mesh | Sheet or strip slit and stretched into connected diamonds | Thickness, SWD, LWD, strand, raised/flattened |
| Perforated sheet | Discrete holes formed in sheet | Hole shape/size, pitch, pattern, margins, open area |
| Welded mesh | Crossed wires joined at intersections | Wire sizes, spacing, joint, panel and flatness |
These forms should not share one generic size table. Perforated sheet is not expanded mesh, and a woven mesh count does not describe an expanded diamond.
3. Feedstock Standards and Finished-Mesh Control
ASTM B863 covers titanium and titanium-alloy wire. ASTM B265 covers titanium and titanium-alloy strip, sheet and plate. They may establish feedstock requirements when ordered, but they do not fully define a finished woven, expanded, perforated or welded mesh.
State the feedstock specification and revision, then use a drawing or purchase specification to define construction, geometry, tolerances, surface, edges, fabrication, inspection and marking.
4. Form-Specific Geometry
4.1 Woven mesh
- Wire diameter and tolerance.
- Clear aperture or mesh count plus the measurement convention.
- Weave type, open area if required, width, length, flatness and edges.
- Mesh count alone cannot determine aperture without wire diameter.
4.2 Expanded mesh
- Feedstock thickness, SWD, LWD and strand width.
- Raised or flattened condition and overall thickness.
- Diamond orientation, sheet/coil size, edge style and flatness.
- Distinguish center-to-center diamond dimensions from clear openings.
4.3 Perforated sheet
- Hole shape and size, pitch, staggered or straight pattern.
- Sheet thickness, margins, unperforated zones and open area.
- Burr direction/limit, flatness, sheet size and cut profile.
4.4 Welded mesh
- Longitudinal and transverse wire diameters and spacing.
- Intersection/joint requirement and acceptance method.
- Panel size, squareness, flatness, edges and frame details.
5. Grade, Surface and Finished Condition
Choose grade from the service environment, strength, ductility, mesh-forming and fabrication requirements. Do not present Grade 1, Grade 2 and Grade 5 as interchangeable. State the feedstock condition, finished surface, cleaning, visible-defect criteria and handling restrictions.
Grade, UNS if needed, feedstock specification/revision, heat or lot and identity-transfer method.
As-produced, cleaned or otherwise specified; defect limits, residues, contact materials and protection.
6. Flow, Current and Structural Inputs
Open area is useful but does not by itself establish filtration performance, pressure drop, current distribution or structural capacity. The responsible designer must consider aperture/diamond geometry, thickness or wire diameter, support spacing, load direction, media properties, fouling, cleaning, connection and operating conditions.
- For screening, specify the actual retention target and whether aperture verification is required.
- For flow service, identify allowable pressure drop, velocity, support and fouling/cleaning basis.
- For electrochemical service, define active area, current path, connection, contact resistance and coating responsibility.
- For structural duty, provide load cases, support, direction and approved design criteria.
7. Fabrication, Orientation and Edge Control
Cutting, forming, rolling, welding and framing can change flatness, opening geometry, surface and edge condition. The drawing should identify orientation, datum, profiles, holes, tabs, frames, joints and inspection dimensions. Agree whether burr removal, edge bands, protective covers or post-fabrication cleaning are required.
8. Bare Anode Substrate and Finished-Anode Boundary
Bare titanium mesh is only the substrate. A finished MMO or platinized anode requires a separate definition of pretreatment, coating chemistry, loading or thickness basis, active area, connection, service, current density, inspection and performance acceptance. A generic coating name does not define a finished anode.
9. Medical Material and Titanium-Coated Mesh Boundary
Solid titanium raw material, a fabricated titanium mesh component and a titanium-coated polymer or surgical mesh are different products. Raw-material conformity does not establish finished-device approval, biological evaluation, sterilization validation, clinical suitability or surgical outcome. If the order supports a regulated device, the device manufacturer must define the approved material, supplier, process and validation requirements.
10. Process Evidence and Quotation Comparison
| Control question | Evidence when applicable | Acceptance decision |
|---|---|---|
| Is the feedstock the ordered material? | MTC, heat/lot identity, feedstock specification and transfer record | Grade, revision and identity agree |
| Is the mesh geometry correctly defined? | Drawing, dimension symbol map, calibrated report and sampling plan | Form-specific dimensions and tolerances agree |
| Does fabrication match the drawing? | Cut/form/weld plan, in-process checks and final dimensional report | Orientation, edges, frames and critical interfaces agree |
| Is delivery based on the same scope? | Document index, packing proposal, schedule stages, Incoterm and exclusions | Technical and commercial assumptions align |
Price depends on feedstock grade and thickness/wire diameter, mesh construction, open geometry, yield loss, overall size, edge and flatness control, cutting/fabrication, inspection, packing, quantity and logistics. Compare the same construction and finished scope rather than price per kilogram alone.
11. Complete Titanium Mesh Purchase Guard
11.1 Construction and feedstock identity
- Name woven, expanded, perforated or welded construction.
- State grade, feedstock specification and required revision.
- Identify raised/flattened condition, weave or perforation pattern where applicable.
- Prohibit unapproved construction, grade, source or route changes when qualification depends on them.
11.2 Form-specific geometry
- Use the correct dimension set for the selected construction.
- Define nominal values, tolerances, measurement points and method.
- Clarify aperture versus center spacing and opening versus diamond pitch.
- Attach a dimensioned sketch when terminology may differ.
11.3 Overall size, orientation and edges
- State sheet, roll, panel or cut-part dimensions and tolerances.
- Identify weave/diamond/pattern orientation relative to the part.
- Define sheared, trimmed, bond, random or drawing-specific edges as applicable.
- State flatness, squareness, coil set and protective edge requirements.
11.4 Service and design responsibility
- Record media, temperature, pressure differential, velocity, loads, electrical duty and cleaning.
- Name the responsible designer and governing equipment requirements.
- Separate material/mesh supply from system filtration, structural or electrochemical performance approval.
- Do not turn an open-area value into an unconditional performance guarantee.
11.5 Fabrication and assembly boundary
- Separate mesh supply, cutting, forming, rolling, welding, frames, tabs, surface preparation and assembly.
- Identify internal, externally controlled and excluded operations.
- Freeze drawing revision, datums, joints and critical inspection dimensions.
- Define responsibility for installation and final-equipment validation.
11.6 Inspection and acceptance
- List material, geometry, size, surface, edge, flatness, weld and other checks only as applicable.
- For every check, state method, sampling, acceptance and report requirement.
- Agree witness/hold points and third-party scope before order.
- Define nonconformity, concession, rework, replacement and claim procedures.
11.7 Documents, marking and traceability
- Create an order-specific document index.
- Link heat/lot identity through mesh forming, cutting, fabrication, labels, MTC and packing list.
- Mark mesh type, drawing/revision and piece/lot identity where required.
- Reject generic or unrelated certificates as proof for the ordered material.
11.8 Bare substrate and coating boundary
- State whether the scope ends at bare mesh or includes a finished coated electrode.
- For coated scope, define pretreatment, coating system, loading/thickness basis, active area and tests.
- Define connection details and masked/uncoated zones.
- Keep design-life and performance claims tied to agreed service and acceptance methods.
11.9 Availability, MOQ and commercial basis
- Ask whether feedstock and mesh are physically available, incoming or made to order.
- Confirm whether MOQ comes from feedstock, setup, sheet/roll yield, fabrication or shipping lot.
- Normalize quantity and price by sheet, roll, piece, area, kilogram or lot.
- Align currency, validity, Incoterm, named place, schedule stages and exclusions.
11.10 Packing, handling and storage
- Prevent bending, telescoping, crushed openings, edge damage and surface contamination.
- Define interleaving, cores, frames, crates, moisture protection and lifting points.
- Align inner identity, outer label, packing list and certificate.
- State storage and handling rules for clean or coating-ready substrate.
Red flags before purchase order
The quotation uses mesh count, opening and thickness without identifying woven, expanded, perforated or welded construction.
B265 or B863 is shown as if it fully controls finished geometry and fabrication.
A micron aperture is claimed from mesh count without wire diameter and measurement rule.
The quote does not say where substrate supply ends and anode coating responsibility begins.
Decision gate
Do not release the order until construction, feedstock, geometry, overall size, service/design basis, fabrication, inspection, documents, packing and delivery terms tell the same story.
12. RFQ and Pre-Order Checklist
Woven/expanded/perforated/welded, grade, feedstock standard and revision.
Form-specific dimensions, tolerances, open area and orientation.
Sheet/roll/panel size, profile, edge, flatness and quantity.
Cutting, forming, rolling, welds, frame, tabs, coating boundary and drawing.
MTC, traceability, geometry inspection, surface, weld and final reports.
Quantity basis, MOQ, validity, packing, destination, Incoterm and required date.
13. Titanium Mesh Purchasing FAQ
Which dimensions define woven titanium mesh?
Specify wire diameter, aperture or mesh count, weave, open area where required, roll or sheet width and length, edge condition and flatness.
Which dimensions define expanded titanium mesh?
Specify feedstock thickness, SWD, LWD, strand width, raised or flattened condition, overall thickness, sheet or coil size, orientation and edge condition.
Can B265 or B863 alone define the finished mesh?
No. They may control the raw sheet/strip or wire. A drawing or purchase specification must define the finished mesh construction, geometry, tolerances, surface, edges and fabrication.
Is perforated sheet the same as expanded mesh?
No. Perforated sheet is punched or otherwise formed with discrete holes; expanded mesh is slit and stretched to create connected openings and strands.
What should an anode-substrate RFQ include?
Include substrate grade and form, mesh geometry, dimensions, active area, current-collection and connection details, surface preparation boundary, coating responsibility, service and inspection requirements.
How should two titanium mesh quotations be compared?
Normalize mesh construction, feedstock grade and specification, geometry, tolerances, overall size, fabrication, tests, documents, quantity basis, packing, Incoterm, schedule assumptions and exclusions.