A boiler feed pump doesn't fail on the day it's finally shut down for repair — it starts failing weeks earlier, one rising vibration reading at a time. A monthly vibration route is how that early warning gets caught, logged, and acted on, instead of showing up as an unplanned trip. Here is what a proper route covers across BFPs, fans, and motors.
Why Trend Matters More Than A Single Reading
One vibration value tells you almost nothing on its own. A route only becomes useful once you have three or four consecutive months to compare — that's what turns a number into an early warning for bearing wear, misalignment, or imbalance.
Equipment Covered On A Standard Route
Not every rotating asset needs the same measurement points or the same urgency.
Boiler Feed Pumps
Highest priority on the route — both bearings, radial and axial, checked monthly given the cost of an unplanned BFP trip.
Fans (ID / FD)
Prone to imbalance from dust and ash buildup on blades, so trend direction matters as much as the reading itself.
Motors
Drive-end and non-drive-end bearings checked together, since a rise on one side often signals misalignment with its coupled load.
Reading The Result: ISO 10816 Zones
Zone A
New or recently commissioned machine condition. No action.
Zone B
Acceptable for continuous long-term running. Keep monitoring the trend.
Zone C
Unsatisfactory for sustained running. Schedule corrective work.
Zone D
Damage risk. Machine should be flagged for immediate attention.
Monthly Route Structure
| Asset Class |
Measurement Points |
Route Frequency |
| Boiler feed pumps |
4 points per bearing pair |
Monthly |
| ID / FD fans |
Bearing + housing points |
Monthly |
| Drive motors |
DE + NDE bearing points |
Monthly |
| Any Zone C or D asset |
Full point set + spectrum |
Weekly until resolved |
A spreadsheet route loses the one thing that makes vibration data useful — the trend line. Teams that sign up for Oxmaint get every asset's reading history plotted automatically, with Zone C and D results routed straight into a work order — or book a demo to see a live vibration route on the platform.
Q
Is monthly frequent enough for critical rotating equipment?
For most balance-of-plant rotating equipment, yes. Once an asset shows a Zone C or D reading, the route should shift to weekly on that specific machine until the issue is corrected and readings return to Zone B.
Q
Do all four points per bearing actually get checked every time?
They should be — horizontal, vertical, and axial at minimum, sometimes a fourth angled point on critical bearings. Skipping a point is how a developing fault gets missed until it shows up on the points that were checked.
Q
Who reviews a Zone C or D reading once it's logged?
Typically the reliability or condition monitoring engineer, and it should trigger a work order the same day rather than waiting for the next planning meeting to surface it.
See Every Bearing's Trend Before It Becomes A Trip
BFP, fan, and motor readings logged against ISO 10816 zones, plotted automatically, with Zone C and D results turned into work orders instantly. Sign up for a free trial to set up your first vibration route, or book a demo to see the trend dashboard live.
