B05 · Wastewater & Environmental
Select and Use 316/304 Stainless for Water Treatment & Reuse / Environmental Protection
List of 11 Stainless Parts for Environmental Purposes: Commonly Used 316, 304, 316L, Thickness from 2–200 mm.
List of 11 Parts and Material Recommendations
| Part / Component | Recommended Grade | Size / Thickness | Surface | Main Failure Modes | Reference Standards |
|---|---|---|---|---|---|
| Groove Teeth Scraper | 304 | Teeth 3-8mm | 2B/Working Surface | Sandstone Wear + Sewage Corrosion | GB/T 3280；CJ/T 3048 |
| Grate Frame / Grids / Traction Chain | 304 | Steel Profiles / Plates 5-12mm | 2B/Acid Pickling | Moisture + Hydrogen Sulphide Corrosion + Wear | GB/T 3280 |
| Submerged Fine Grating Submersible Panels / Enclosure | 316 (main underwater components) | 2.0–6.0mm | 2B | Long-term Submersion in Water + Chloride Stress Corrosion Cracking | GB/T 3280 |
| Central Drive Skimmer Shaft | 420 (shaft) /316LRound Tube | Diameter 50–200mm, Wall Thickness 5–12mm | Processed Surface/2B | Overload Torque + Corrosion Fatigue | GB/T 1220；GB/T 3280 |
| Scrubbing Mud Pump Blades/Shell (Flow Components) | 316 | Forgings/ Sheets 2-10mm | 2B/Face | Sludge Erosion + Corrosion | GB/T 3280；GB/T 2100 |
| Purlins/Gutter/Suction Pipe in Sludge Scrubber | 316/316L | 3–12mm | 2B | Sludge + Wastewater + Hydrogen Sulfide Corrosion | GB/T 3280；ASTM 316L |
| Concentrating Sludge Scraper/Blades/Rods/Water Inlet Board | 316 | 2–8mm | 2B | Sludge Erosion + Corrosion | GB/T 3280 |
| Rod/Support/Hydraulically Non-Flowing Chain | 304 | 2–8mm | 2B | Moist Atmospheric Corrosion | GB/T 3280 |
| Micro Porosity Aeration Fasteners | 316 | M6–M12 | Passivation | Wastewater + Aeration Oxidation + Crevice Corrosion | GB/T 3098.6 |
| Additive Storage Tanks/Piping | 316L | 2–6mm | 2B | Corrosion by Chlorine dioxide/Ozone/Sulfuric Acid | GB/T 3280 |
| High-chlorine wastewater pipeline, High-chlorine wastewater chiller, High-chlorine wastewater membrane shell | 2205/2507 | 2–20mm | 2B/acid washing | High chloride ion pitting + stress corrosion cracking | ASTM A240；GB/T 3280 |
Table showsStandard configuration.For the same part, different media, temperatures, and welding methods may require 304, 316L, or 2205 —— Explain usage conditions clearly; it's easier than specifying grades.
Material Selection Tips
- Common Alloy Grades: 316 (5), 304 (3), 316L (3)
- Corrosion Sources: Chlorides and Salts (3/11 hits)
- Wear Parts: Hardness Considerations (2/11 hits)
- Thickness Range: 2–200 mm (consider bending, deep drawing for thin plates; welding, heat input, sensitization for thick plates)
Common Issues
Which Stainless Steel is Used Most in Water Treatment and Recycling / Environmental Applications?
Out of the 11 parts listed, 316 (5), 304 (3), and 316L (3) are most common. Specific parts may require different grades based on media and temperature, e.g., stainless countertops exposed to salt water might need a change from 304 to 316L.
What parts are most prone to issues?
By failure description, typical is "high chloride wastewater pipe/heat exchanger/membrane shell": pitting and stress corrosion cracking; recommended grade 2205/2507, size 2–20mm. This condition requires specifying media concentration, temperature, and cleaning method in the design phase.
How thick should it be?
Thickness ranges from 2 to 200 mm. Thin plates consider forming and surface quality, while thick plates look at welding and structural strength; different manufacturers may have varying values for the same part, review your drawings or conditions to confirm.
Related materials and adjacent industries
Delivery cases of similar operating conditions
Chemical equipment and environmental protection
Stainless steel thick plates · 3–60 mm
316L / 2205 thick plates and hot-rolled coils, thickness 3–60 mm, used for storage tanks, heat exchangers, and desulfurization units, available for third-party verification.
Applications11