What is most commonly used in irrigation?
In practical irrigation system design:
Low-pressure systems (drip, micro-irrigation):
→ PN4–PN6 is usually sufficient
Medium-pressure systems (sprinkler irrigation):
→ PN6–PN10 is most common
High-pressure or long-distance pumping systems:
→ PN10–PN16 may be required
Key engineering considerations
Operating pressure vs. nominal pressure: PN is rated at 20°C over long-term service life (usually 50 years). You should apply derating factors for:
Higher temperatures
Transient pressures (water hammer)
SDR relationship: Lower SDR = thicker wall = higher pressure resistance
Flow velocity control: Typically ≤1.5–2.0 m/s to minimize surge pressure
Practical takeaway
Most agricultural irrigation projects fall in the range of:
👉 PN6 to PN10 as the standard design window
If you're sizing a system, it's better to confirm:
Pump head
Elevation changes
Length of pipeline
Irrigation method (drip vs sprinkler)
