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NORSOK P-002 Standard
Overview
NORSOK P-002 is a Norwegian petroleum industry standard that provides requirements and guidelines for piping system design, including flow velocity limits to prevent erosion and corrosion.
The standard is widely adopted in the oil and gas industry for offshore and onshore facilities.
Velocity Limits
NORSOK P-002 specifies maximum flow velocities for different fluid types and pipe materials to prevent erosion-corrosion:
- Carbon steel pipes: 6 m/s for continuous service, 10 m/s for intermittent service
- Stainless steel pipes: 7 m/s for continuous service, 12 m/s for intermittent service
- Two-phase flow: Maximum 15 m/s to prevent slugging and erosion
- Sandy conditions: Velocity should be reduced based on sand content
Key Considerations
When applying NORSOK P-002 velocity limits, consider:
- Fluid properties (viscosity, density, corrosiveness)
- Sand and solid particle content
- Temperature and pressure conditions
- System geometry (bends, tees, reducers)
- Material selection and corrosion allowance
Velocity Recommendations
| Pipe Material | Continuous Service | Intermittent Service | Notes |
|---|---|---|---|
| Carbon Steel | ≤ 6 m/s | ≤ 10 m/s | For non-corrosive fluids |
| Stainless Steel | ≤ 7 m/s | ≤ 12 m/s | 316/316L alloys |
| Duplex Steel | ≤ 8 m/s | ≤ 15 m/s | Super duplex up to 20 m/s |
| Two-Phase Flow | ≤ 15 m/s | ≤ 20 m/s | Dependent on GVF |
| Sandy Conditions | ≤ 3 m/s | ≤ 5 m/s | Based on sand content |