Aluminum Alloy Pipes (DongKe Advanced) | Construction, Industrial, Portable Structures | 6000 Series Aluminum Alloy (ASTM B211) Type II Anodized (MIL-A-8625) Seamless (EN 10216-2) T6 Tempered (ASTM B221) | ▲ Enhanced Strength (T6 temper: 320 MPa yield vs T3's 240 MPa) High corrosion resistance (ASTM B117 > 1000hrs) Lightweight (25% lighter than steel) | Higher cost compared to galvanized steel Not suitable for high-temperature (>200°C) applications |
Aluminum Alloy Pipes (DongKe Base) | Residential, Light Industrial, Temporary Installations | 6000 Series Aluminum Alloy (ASTM B211) Clear Anodized (MIL-A-8625) Seamless (EN 10216-2) T3 Tempered (ASTM B221) | Cost-effective alternative to steel Moderate corrosion resistance (ASTM B117 > 500hrs) Lightweight (2.7g/cm³ density) | Lower strength (T3 temper: 240 MPa yield) Limited chemical resistance in harsh environments |
Galvanized Steel Pipes (Industry Standard) | Plumbing, Residential, General Construction | Carbon Steel (ASTM A53) Hot-Dip Galvanized (ASTM A123) Welded Construction | Widely available Cost-effective for moderate corrosion environments High pressure tolerance (Schedule 80: 2600 PSI) | Heavy (7.8g/cm³ density) Prone to rust if coating damaged ▲ Lower corrosion resistance vs aluminum (ASTM B117 < 500hrs) |
Stainless Steel Pipes (High-End) | Chemical Plants, Marine, High-Corrosion Areas | 316 Stainless Steel (ASTM A312) Passivated Surface (ASTM A967) Seamless (ASTM A312) | Excellent corrosion resistance (ASTM G48) High strength (500 MPa yield) Heat-resistant up to 800°C | High cost (2× aluminum) Brittle at low temps (-20°C) Requires specialized welding tools |
PVC Pipes | Plumbing, Irrigation, Non-Structural Use | PVC Schedule 40 (ASTM D1784) UV Stabilized (ASTM D1693) Seamless | Lightweight (1.4g/cm³ density) Chemically inert (resists acids/bases) Low cost | Brittle at <0°C Low pressure rating (Schedule 40: 276 PSI) ▲ Lower strength vs metals (Yield < 40 MPa) |
Copper Pipes | Plumbing, HVAC, Domestic Water Supply | Copper Type K (ASTM B88) Drawn Seamless (ASTM B88) Oxygen-Free (ASTM B115) | Excellent thermal conductivity (380 W/m·K) Resists corrosion from water Durable (50+ year lifespan) | Expensive (3× aluminum) Susceptible to pitting in saltwater Heavy (8.9g/cm³ density) |