For temporary cone & basket strainers, ASME B16.5 fit defines the specification designations and tolerances. The sections below describe the scope, the properties it leaves to companion standards, and the equivalent designations across standards bodies.
ASME B16.5 fit — Scope
ASME B16.5 fit specifies the designation system, dimensions and tolerances of temporary cone & basket strainers — 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
ASME B16.5 fit 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 ASME B16.5 fit
| Nominal pipe size | Screen mesh | Open area ratio | Style | Reference standard |
|---|---|---|---|---|
| DN25 (1 in) | 20-Mesh to 100-Mesh | >150% | Cone / basket / truncated | ASME B16.5 flange fit |
| DN50 (2 in) | 20-Mesh to 100-Mesh | >150% | Cone / basket / truncated | ASME B16.5 flange fit |
| DN80 (3 in) | 20-Mesh to 100-Mesh | >150% | Cone / basket / truncated | ASME B16.5 flange fit |
| DN100 (4 in) | 20-Mesh to 100-Mesh | >200% | Cone / basket / truncated | ASME B16.5 flange fit |
| DN150 (6 in) | 20-Mesh to 100-Mesh | >200% | Cone / basket / truncated | ASME B16.5 flange fit |
| DN200 (8 in) | 10-Mesh to 60-Mesh | >200% | Cone / basket | ASME B16.5 flange fit |
Companion Standards
ASME B16.5 fit controls the geometry of temporary cone & basket strainers. 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 ASME B16.5 fit
ASME B16.5 fit is the US-market reference; for metric programs pair it with the ISO designation so both markets read the order identically.