Choosing the Right Stainless Steel for Filtration Pipe

Date: 2025-11-19

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Category: OASIS News

Stainless steel is critical for filtration systems due to its corrosion resistance and durability.
As a specialist in stainless steel filtration piping, OASIS summarizes the key types and their selection guidelines below.​

1. Austenitic Stainless Steel​
Composition: ~18% Cr, 8–25% Ni (may add Mo/Cu/Ti, e.g., 304/316L).​
Key Properties: Non-magnetic, high toughness, excellent corrosion resistance.​
Filtration Use: Ideal for hygiene-critical or mild-corrosion environments (food processing, pharma, clean water).​
OASIS Tip: 316L (low-carbon) avoids intergranular corrosion after welding—perfect for sanitary pipelines.​

2. Martensitic Stainless Steel​
Composition: Higher carbon, ~13% Cr.​
Key Properties: Magnetic, high strength/hardness, poor weldability.​
Filtration Use: Rare in piping; used for wear-resistant components (valve cores, small fittings).​

3. Ferritic Stainless Steel​
Composition: 15–30% Cr, low/no Ni.​
Key Properties: Good thermal stability, cost-effective.​
Filtration Use: Suitable for low-corrosion, thermal applications (e.g., some heat exchangers).​
OASIS Tip: Avoid high chloride environments—best for mild conditions.​

4. Duplex Stainless Steel (Added for High Demand)​
Composition: ~22% Cr, ~5% Ni, ~3% Mo (e.g., 2205).​
Key Properties: High strength, excellent chloride corrosion resistance (better than austenitic).​
Filtration Use: High-corrosion scenarios (seawater treatment, chemical wastewater).​

Selection Conclusion​
Choose based on corrosion level (e.g., chloride concentration), temperature, and pressure.​
OASIS supports clients with material testing (e.g., PMI) and tailored solutions to ensure longevity and cost-effectiveness.​

OASIS – Your Trusted Partner in Stainless Steel Filtration Piping.