If you are specifying filtration media in Noida or Delhi NCR, the quick answer is: SS 304 perforated sheet is the default choice for food-grade, chemical and corrosion-resistant filtration, with hole sizes typically 1-5 mm and open area 20-40%. It will not rust, stain or taint the product being filtered - which is exactly why it dominates hygienic and chemical duties. This guide from Garg Industrial Mesh, Sector 9 Noida, explains the specs.
Why SS 304 for filtration?
Filtration media sits in constant contact with liquids, slurries or chemicals. Bare MS would rust and contaminate the product; SS 201 can stain in damp or acidic conditions. SS 304 resists corrosion from water, food products and most mild chemicals, so it stays clean and inert over years of service. For anything food-grade, pharmaceutical or wet, SS 304 is the safe specification.
SS 304 perforated sheet specs for filtration
| Spec | Typical range |
|---|---|
| Grade | SS 304 (also SS 316 for harsh chemical) |
| Sheet size | 4x8 ft (1220x2440 mm) |
| Thickness | 0.5-3 mm |
| Hole type | Round (most common) |
| Hole diameter | 1-5 mm |
| Open area | 20-40% |
| Indicative price | Rs220-300/sqft |
How to choose the hole size for filtration
Match the hole to what you are filtering. For coarse straining (large particles, debris), 3-5 mm holes work. For fine filtration (sand, grit, small particles), 1-2 mm holes are better. The smaller the hole, the finer the retention - but the lower the flow rate, so balance retention against throughput.
How to choose open area
Higher open area means faster flow but less structural strength. For a filter that must pass liquid quickly, push open area toward 35-40%. For a structural screen that also filters, 20-25% is stronger. Most filtration duties land around 30% open area.
Common applications for SS 304 perforated filtration sheets
Food and beverage straining, water treatment pre-filtration, chemical processing, pharmaceutical sieving, oil and coolant filtration, and architectural water features. In every case, SS 304 keeps the media inert and clean over a long service life.
SS 304 vs SS 316 for harsh chemical filtration
For most filtration, SS 304 is enough. For strongly acidic, saline or chloride environments, step up to SS 316, which resists pitting corrosion far better. Garg Industrial Mesh can source SS 316 on order for harsh duties.
How to order SS 304 perforated filtration sheet
Garg Industrial Mesh, Sector 9 Noida, stocks SS 304 perforated sheets and cuts to your exact frame size. Tell us the hole size, open area and thickness and we will quote same day with GST billing - call or WhatsApp 9910238277.