1. Application Scenarios and Media Compatibility
Industrial Applications (e.g., chemical, petroleum): Material selection must be based on the transported medium (corrosive liquid/gas). For example, 316L stainless steel is resistant to seawater corrosion, while 304 stainless steel is suitable for general acid and alkaline environments.
Gas Connections: Must comply with GB 41317-2024 standard. 304 stainless steel corrugated pipes with QR code traceability are preferred, with a service life ≥ 8 years.
2. Working Condition Matching
Temperature: Metal corrugated pipes can withstand temperatures up to 400°C (e.g., automotive exhaust systems), while plastic corrugated pipes are limited to below 80°C.
Pressure: Metal corrugated pipes withstand pressures of 1-10 MPa, while plastic corrugated pipes withstand ≤1 MPa, requiring a 1.5 times safety margin.
3. Structural Form and Dimensions
Flexibility Requirements: For dynamic bending scenarios (e.g., automotive manufacturing), choose spiral corrugated pipes; for fixed installations, choose single/double layer structures.
Size Specifications: Gas hose length ≤ 2 meters, nominal size must match the interface (e.g., DN15).
4. Environmental Adaptability
Outdoor Use: Select UV-resistant plastic corrugated pipe (e.g., carbon black PE pipe) or 316 stainless steel.
Confined Spaces: Prioritize spiral corrugated pipes with small bending radius.
5. Standards and Certifications
Mandatory Certification: From October 2025, gas hoses must pass CCC certification. When purchasing, verify the new national standard markings such as GB 41317-2024.
Outdated Standards: Avoid purchasing products conforming to the obsolete CJ/T197-2010 standard.
6. Cost and Maintenance
Life Cycle Cost: Metal corrugated pipes have higher initial costs but longer lifespan; plastic corrugated pipes require frequent replacement but have a lower unit price.