25/06/2026
Carbon Steel Pipe: Common Sizes & Applications
💡Common Sizes
1. Nominal Diameter (DN)
DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200
2. Outer Diameter (OD)
21.3mm, 26.9mm, 33.7mm, 42.4mm, 48.3mm, 60.3mm, 76.1mm, 88.9mm, 114.3mm, 139.7mm, 168.3mm, 219.1mm
3. Wall Thickness
Common ranges: 2.0mm – 10.0mm, standard schedules: SCH40, SCH80
💼Main Applications
1. Water supply & drainage systems for buildings and municipal projects
2. Oil, gas and liquid pipeline transportation
3. Heating, ventilation and air conditioning (HVAC) systems
4. Industrial fluid delivery in factories
5. Pipeline construction for fire protection engineering
6. Structural support for scaffolding, steel frames and machinery
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