ASME sizing practice covers the requirements for demister pads (mist eliminators). Reproduced below: the complete specification table, the tolerance classes, and the companion and equivalent standards referenced when ordering to this document.
ASME sizing practice — Scope
ASME sizing practice specifies the designation system, dimensions and tolerances of demister pads (mist eliminators) — 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 sizing practice 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 sizing practice
| Pad density (kg/mu00b3) | Thickness (mm) | Wire diameter (mm) | Grade | Reference standard |
|---|---|---|---|---|
| 80 | 100 | 0.28 | General purpose | ASME approx. sizing |
| 112 | 100 | 0.28 | Standard | ASME approx. sizing |
| 144 | 100-150 | 0.28 | High efficiency | ASME approx. sizing |
| 192 | 150 | 0.23 | High efficiency | ASME approx. sizing |
| 300 | 150 | 0.15 | Co-knit glass fiber | ASME approx. sizing |
Equivalent Standards
Where direct equivalents exist (ISO ↔ ASTM ↔ DIN), they are listed on the parent Demister Pads (Mist Eliminators) page. Confirm against the specification table on this page — nominally equivalent documents can differ in tolerance limits.
When to Specify ASME sizing practice
ASME sizing practice is the US-market reference; for metric programs pair it with the ISO designation so both markets read the order identically.