ISO 4022 covers the requirements for sintered fiber felt. Reproduced below: the complete specification table, the tolerance classes, and the companion and equivalent standards referenced when ordering to this document.
ISO 4022 — Scope
ISO 4022 specifies the designation system, dimensions and tolerances of sintered fiber felt — mesh count or nominal opening, wire diameter and the permissible aperture deviations. Alloy chemistry, mechanical testing and delivery condition are governed by separate documents in the same standards family.
Tolerance Classes
ISO 4022 defines tolerance limits on the average aperture and on the maximum single aperture, tightening as the aperture gets finer. For test-sieve duty the tighter ISO 3310-1 tolerances apply instead of the general cloth tolerances — specify sieve grade explicitly if the mesh will be used for particle-size analysis.
Specifications Defined by ISO 4022
| Micron rating (u00b5m) | Thickness (mm) | Porosity (%) | Form | Reference standard |
|---|---|---|---|---|
| 3 | 0.35 | 75 | Sheet / cut disc | ISO 4022 |
| 5 | 0.40 | 78 | Sheet / cut disc | ISO 4022 |
| 10 | 0.45 | 80 | Sheet / cut disc | ISO 4022 |
| 20 | 0.55 | 82 | Sheet / cut disc | ISO 4022 |
| 40 | 0.60 | 83 | Sheet / cut disc | ISO 4022 |
| 60 | 0.70 | 85 | Sheet / cut disc | ISO 4022 |
Companion Standards
ISO 4022 controls the geometry of sintered fiber felt. Companions frequently cited alongside it: ISO 565 / ASTM E11 (test-sieve aperture series), ISO 3310-1 (test sieves of metal wire cloth), ISO 4783 (selection of wire and aperture combinations), ISO 9044 (industrial woven wire cloth), and ISO 2941 (collapse/burst rating for finished filter elements).
When to Specify ISO 4022
Choose ISO 4022 for international procurement and OEM supply where ISO documents are the contractual reference. It is the default modern specification for sintered fiber felt.
