6. Site acceptance and warranty — the next 12 months
The pump arrives, gets installed, gets commissioned, and the buyer’s attention moves to the next project. This is exactly when the most expensive procurement failures crystallize — silently, until the first unplanned outage proves them.
This section is the buyer’s guard rail for the first 12 months.
6.1 Receiving inspection at site
Within 5 business days of pump arrival on site:
- Visual inspection — packaging integrity, casing damage, missing labels
- Cross-check serial number against FAT certificate
- Verify bearing protector caps in place (for bearings shipped with shipping plugs only)
- Verify shaft rotation freely by hand at coupling
- Confirm preservation oil/grease present per shipping spec
- Check internal preservation desiccant bags fresh
- Compare delivered nameplate against datasheet
- Inspect packaging for evidence of moisture intrusion during shipping
Document any non-conformance immediately with photos. Do not sign the delivery acceptance until reservations are recorded; once signed clean, disputes are uphill.
6.2 Pre-installation storage
Pumps stored more than 30 days before installation need:
- Indoor storage with humidity control
- Shaft rotation by hand every 30 days (1/4 turn) to prevent bearing brinelling
- Preservation oil/grease replenishment per vendor spec at 90 / 180 / 365 days
- Climate-controlled environment if storage > 6 months
A common warranty-loss scenario: pump stored outdoors in tropical climate for 4-8 months, bearings corrode, fail at startup, vendor refuses warranty claim citing storage conditions. The vendor is generally right in this case. Storage discipline is the buyer’s responsibility.
6.3 Installation supervision
Vendor supervision during installation is usually optional in contracts — buy it anyway:
- Vendor’s installation engineer present for at least 2 days
- Witnessed cold and hot alignment
- Witnessed first start
- Witnessed instrumentation calibration
- Sign-off on installation conformity
Vendor supervision typical cost: 1-3% of CAPEX for 2-5 days. Cost of self-installing wrong: ~25-50% of CAPEX in remediation plus warranty disputes.
The supervisor’s role is to certify, in writing, that the installation matches the manufacturer’s IOM manual. This certificate is what protects the warranty if a year-one failure occurs.
6.4 Commissioning — the gating event
Commissioning is the buyer’s last chance to validate FAT performance under real operating conditions:
| Test | Pass criterion |
|---|---|
| Cold start with no load | Pump runs, alignment holds within FAT tolerance |
| 4-hour run at 25-50% rated flow | Bearing temperature stable, vibration within FAT |
| 4-hour run at 75-100% rated flow | Bearing temperature ≤ FAT temperature + 5 K |
| 30-minute run at 110-120% rated flow | No cavitation indication (sound, vibration) |
| Coupling alignment hot (after 2 h running) | Within tolerance per supplier IOM |
| Lube oil sample | No visible debris, ferrous count within baseline |
Document each test in a commissioning report co-signed by the buyer’s project engineer and vendor’s representative. This is the artifact that starts the warranty clock per the contract.
6.5 First-year inspection schedule
In addition to the routine maintenance schedule, plan three buyer-led inspections in the first 12 months:
| Month | Inspection focus | Why |
|---|---|---|
| 1 | Hot alignment re-check, vibration spectrum, bearing temp | Verifies no settling-induced misalignment |
| 6 | Vibration trending, lube oil ferrous count, seal leakage | Catches early bearing or seal issues while warranty is open |
| 12 | Full performance test (Q, H at duty point), efficiency, NPSH check | Validates as-installed performance against FAT |
Any deviation from FAT-baseline performance at month 12 is a warranty event if it exceeds tolerance bands. Document and trigger the warranty process before month 12 expires.
6.6 Warranty claim mechanics
When a warranty event occurs, follow the contractual process to the letter:
- Notice in writing within 5 business days of discovering the issue
- Photographs and operating data attached
- Reference to specific contract clause and performance guarantee
- Allow vendor reasonable access to inspect — typically 10-15 business days
- Joint root-cause investigation (vendor cannot refuse if contract has inspection rights)
- Repair / replace / refund per contract — buyer chooses where contract gives buyer choice
Common vendor pushback and the right response:
| Vendor argument | Buyer response |
|---|---|
| “Improper installation” | Reference vendor-supervised installation certificate (§6.3) |
| “Operating outside specified envelope” | Reference RFQ envelope spec (§1.2) and operating data |
| “Maintenance not performed per IOM” | Reference maintenance log; show schedule was followed |
| “Wear-part consumable” | Reference contract spare-parts clause; consumable wear is not warranty, but premature wear at 6 months is |
| “Force majeure” | Document specific event invoked and contractual scope |
6.7 Knowledge capture for next procurement
At month 12, hold an internal post-mortem:
- Did vendor performance match TCO model assumptions?
- How many warranty events?
- Were references at short-list stage predictive of actual experience?
- What would be different in the RFQ next time?
Document the answers and feed them back into the procurement playbook. The next pump purchase — whether 6 months or 5 years from now — should be sharper than this one.
This is the rationale for Section 1 — Specifying being a living document, not a one-time SOP.
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