1. Environmental conditions for use
Temperature and humidity: High humidity and frequent washing environment, prefer 304 stainless steel; dry and regular environment can choose aluminum alloy.
Corrosion: Presence of acid and alkali gases, organic solvents, frequent ozone / peracetic acid disinfection, do not use ordinary carbon steel, choose 304 stainless steel.
Dust and cleanliness level: High cleanliness level requires smooth surface, no dust accumulation, easy to wipe, avoid rough and easily dusty ordinary steel.
2. Industry compliance requirements
Pharmaceuticals, medical devices, food, biological laboratories: Must comply with GMP, require corrosion resistance, water washability, no precipitation, easy cleaning, prefer 304 stainless steel.
Electronics, semiconductors, optoelectronics: No special compliance requirements, focus on cost performance, choose aluminum alloy.
3. Service life and durability
Long-term fixed use (more than 8 years): Aluminum alloy, 304 stainless steel.
Temporary transition, short-term use (3–5 years): Can choose galvanized square steel, powder-coated carbon steel, control costs.
4. Structural load-bearing and stability
Large shed area, many FFU, need to install lamps / pipelines: Select stronger thickened aluminum alloy or stainless steel to avoid frame deformation.
Small and simple clean shed: Ordinary standard aluminum profiles can meet requirements.
5. Budget cost
Cost ranking: Powder-coated carbon steel < Aluminum alloy < 304 stainless steel
Seeking cost performance, regular conditions: Aluminum alloy is the best; sufficient budget and harsh environment: 304 stainless steel is preferred.
6. Installation and later renovation
Aluminum alloy is modular profiles, quick assembly, detachable and movable, convenient for later expansion and renovation.
Stainless steel and carbon steel are mostly fixed by welding, difficult to disassemble and renovate, suitable for fixed and permanent layouts.
7. Maintenance difficulty
Stainless steel: Resistant to scrubbing, not prone to rust, low maintenance cost.
Aluminum alloy: No rust prevention treatment, daily cleaning is sufficient.
Carbon steel powder-coated: Easy to peel off paint and rust, large amount of maintenance work for rust removal and painting in the later stage.
