But a tank that served reciprocating engines for years is not automatically fit to feed a turbine. Corroded steel, cracked bunds and contaminated fuel can cause leaks, failed starts on backup fuel and damaged fuel systems, bringing downtime, penalties, environmental risk and lost permits.
USP&E as Your Guide to Fuel Storage You Can Trust
Test the fuel in every tank: water content, particulate count, microbial contamination and fuel stability. Sample from the bottom of tanks, where water and sludge collect, as well as from the supply line. Results tell you whether fuel can be polished or must be removed, and whether tanks need cleaning.
List and Inspect Every Tank and Bund
Start with a register of every tank, bund, unloading bay and fuel line on your site, with its inspection history and permit status. Many sites like yours find old tanks nobody has inspected for years, or lines that were modified without records.
Inspect your tanks and bunds against the current storage standard: shell and floor thickness, welds, roofs, vents, foundations, bund walls, floors and joints. Decide tank by tank whether you reuse, repair or replace. A bund that cannot hold its required volume, or a floor with deep corrosion, is not worth saving, however attractive reuse looked on paper at the start of your project.
Record your findings with photographs and measurements, so regulators and insurers can see the basis for each decision.
Clean, Upgrade and Treat the Fuel
Your reused tanks need cleaning to remove sludge, water and microbial growth. Then upgrade your tanks where needed: floating suction, water draw-off, level and leak detection, and better vents, breathers and filters. These changes help deliver clean fuel to your turbines and reduce the risk of contamination.
Turbines are more demanding about fuel than many engines, and your old diesel fuel may not meet their limits. Specify fuel treatment, filtration and sampling so delivered fuel meets the turbine maker’s specification, and test stored fuel regularly because backup fuel can sit for months before it is needed. Plan fuel rotation or polishing so it stays usable, and record every test so you can show the fuel was fit on the day it was needed.
Connect the Farm and Plan for Growth
Connect your fuel farm to the new plant with forwarding pumps, filters and controls sized for the turbine’s start and run demands. Check liquid-fuel needs for each candidate, whether a remanufactured GE Frame 6B, used or new gas turbines or natural gas engines, and size your gas turbine generators’ backup storage and run time accordingly.
Gas turbine generators after used diesel succeed when fuel trains, frequency, and people transfer coherently. Operators who already run synchronized diesel fleets understand paralleling, black-start drills, and CMMS tickets — those habits should not reset when the first GT block lands. Write island versus parallel modes, N+1 definitions, and who owns the first minute after a grid event across both fuel families before COD.
Proof from recent work
Mining · Tanzania
Perseus Mining, Nyanzaga Gold Project
USP&E supplied 28 Cummins KTA50 containerised gensets for the Nyanzaga Gold Project in Tanzania.
Mining · Mali
Barrick Gold, Loulo-Gounkoto
USP&E refurbished the 104 MW power station, rebuilding more than 80 MW of Caterpillar CM32 engines and adding new zero-hour capacity.
Read the case study ›Data centres · USA
Major US hyperscale developers
USP&E refurbished 7 GE Frame 6Bs to zero hours in-house for major US hyperscale developers.
Your path from first call to reliable power
Your 3-step plan: 1. Share your tank register, inspection history and gas plans under NDA. 2. Receive an inspection plan and reuse, repair or replace decisions. 3. Clean, upgrade, connect and maintain with accountable O&M.
- List every tank, bund, unloading bay, and fuel line on the site with its inspection history and permit status.
- Inspect tanks and bunds against the current storage standard and decide which to reuse, repair, or replace.
- Clean and upgrade reused tanks, and specify fuel treatment so delivered fuel meets the turbine vendor’s specification.
- Connect the fuel farm to the new plant and reserve bund space and forwarding capacity for modular FX-45 OCGT 45MW / CCGT 108MW 2×1 blocks (50/60 Hz, capacity slots from 2028).
- Renew permits, then hand sampling, draining, and rotation routines to O&M.
Common questions
Can used diesel tanks be reused for gas turbine backup fuel?
USP&E often reuses diesel tanks for turbine backup fuel when inspections show the steel, foundations and bunds are sound. Tanks are cleaned and upgraded, and fuel treatment is added so stored fuel meets the turbine maker’s specification, which is stricter than many engines need.
What does a fuel tank inspection cover?
USP&E inspections cover shell and floor thickness, welds, roofs, vents, foundations, bund walls, floors and joints against the current storage standard. Findings are recorded with photographs and measurements, so each reuse, repair or replace decision is clear to regulators and insurers.
How fast can USP&E respond to a tank reuse assessment?
USP&E can review your tank register, inspection history and gas plans as soon as you share them. Engineers plan inspections and identify obvious problems first, and the overall timeline depends on tank access, cleaning needs, repairs, testing and permit requirements.
Why is fuel quality more important for gas turbines?
USP&E pays close attention to fuel quality because turbine fuel systems are sensitive to water, sediment and certain contaminants. Fuel treatment, filtration and regular sampling keep stored backup fuel within specification, so the turbine starts and runs reliably when gas is interrupted.
How long can backup fuel be stored?
USP&E plans for backup fuel sitting for months, so stored fuel is tested regularly and rotated or polished to stay usable. Water draw-off, filtration, sampling and microbial control prevent the gradual decline that can cause failed starts at the worst possible moment.
Why owners choose USP&E
USP&E is a full-service engineering, EPC and O&M company, not a broker. One team designs, builds and runs your plant, so nothing falls between contracts.
Is your fleet putting uptime at risk?
Tell us your load, fuel and timeline. A USP&E engineer will come back with options for Used Diesel Gensets projects, not a sales pitch.