Roll Cooling
Flat fan headers for hot and cold mill work rolls, sized by flow density, angle and overlap.
CAPABILITIES
What We Hold for Roll Cooling
Flow density
400–1,700 L/min·m barrel
Header pressure
0.3–1.5 MPa (3–15 bar)
Spray angle
40–65° standard; 80–110° wide
HTC data
9,000–11,000 W/m²K (nucleate)
Materials
316L bodies, hardened SS inserts
OEM
Headers built to drawing
SOLUTION MATRIX
Duties, Nozzles and Parameters We Cover
| Duty | Solution | Parameters | Notes |
|---|---|---|---|
| Hot mill work roll cooling | FF-40 / FF-65 flat fans | 8–15 bar header, 40–65° | 2,500–4,000 L/min per roll, 35–45 °C water |
| Cold mill work roll cooling | FF-40 / FF-65 flat fans | 3–8 bar, 2–5% emulsion | 3,000–6,000 L/min per roll, lubricating film |
| Wide barrel / plate mill | FF-80 / FF-110 wide fans | 8–15 bar, 80–110° | Fewer rows, full-width coverage |
| Selective cooling zones | FF-40 zoned headers | 150–400 L/min per zone | Valve-controlled thermal crown |
| Descaling (adjacent duty) | FF-HP hardened high-pressure | 150–250 bar, 15–25° | Not interchangeable with cooling tips |
| Edge masking & blocking | Alignment tips / blocked positions | Barrel end zones | Mask edges without removing hardware |
CHALLENGES WE SOLVE
Where Roll Cooling Programs Usually Struggle
Fire cracking and short roll campaigns
Our Solution
Flow density matched to the stand heat load. Thermal fatigue scales with cyclic strain, not with raw spray volume.
Hot and cool bands across the strip
Our Solution
Parabolic flat fans pitched so the distributions sum even; overlap verified inside the 20–30% band.
More water is not cooling more
Our Solution
Heat transfer coefficient plateaus beyond a flux. We size distribution and coverage, not just litres per minute.
Nozzles clog and erode on mill water
Our Solution
Free-passage flat fans, integral strainers and hardened orifice inserts sized to your water grade.
MATERIALS
Materials We Supply for This Duty
316L stainless
Standard roll cooling duty, hot water and scale service
Hardened SS inserts
High-pressure duty and abrasive scale
Dovetail / box-type mounts
Built-in offset angle, automatic alignment
CAPABILITY & SUPPORT
What Your Program Gets with BoreJet
We work with Hot strip mills, Cold rolling mills, Plate mills, Strip processing lines, with sizing from your numbers, configuration support, samples before the batch, and OEM to drawing.
Send your stand, barrel width and heat load.
Our engineers reply with flow density, nozzle count and header layout, usually within one business day.