GT13E2 Legacy Support: Engineering Europe's Turbine Fleet

Walk through any European combined cycle plant commissioned between 1990 and 2015, and there's a strong chance you'll find a GT13E2 at its heart. The BBC-ABB-Alstom engineering lineage produced one of the most reliable heavy-duty gas turbines ever deployed on this continent—and hundreds of those units are still running, powering district heating networks, industrial cogeneration facilities, and grid-scale power plants from Iberia to the Baltics.

These engines were built to last. But "built to last" is not the same as "lasts forever without support." And the support landscape is changing.

The Legacy Support Gap

The GT13E2 has lived through four corporate parents: BBC, ABB, Alstom, and now GE. Each transition brought organizational change, and with each change, the institutional knowledge specific to older platforms has diluted. Service bulletins get archived. Engineering teams rotate. Priorities shift toward new platforms that generate higher service revenue.

For European operators, this creates a practical gap. The OEM's service organization remains available, but response times have lengthened, and the depth of GT13E2-specific expertise has thinned. When a plant manager in Croatia needs guidance on a combustion hardware issue that last appeared in a 2003 service bulletin, the path to a definitive answer has grown longer.

This isn't a criticism of the OEM. It's the natural lifecycle of industrial platforms. But it does mean that operators need to think strategically about where their long-term support will come from.

Engineering DNA: What It Means in Practice

ZURN Power was built around the GT13E2 platform—not as a line item in a catalog, but as a core engineering focus. Our team carries the institutional knowledge of this turbine's evolution, from the original BBC-designed hot gas path components through the Alstom-era MXL2 upgrade package.

That DNA manifests in several concrete ways:

Component-level understanding. We don't just know the part numbers. We know why the part looks the way it does. Why the S1 blade airfoil has a specific twist distribution. Why the combustion liner cooling hole pattern changed between the 1998 and 2005 vintages. Why the transition piece seal design affects not just leakage but also the thermal gradient that drives cracking. This is the kind of knowledge that comes from years of focused work, not from a specification sheet.

Refurbishment, not just replacement. Not every worn component needs to be replaced with a new one. Many GT13E2 hot gas path parts—blades, vanes, combustion hardware—are candidates for refurbishment, which can extend component life at a fraction of replacement cost. Our 10-step refurbishment process is designed to restore components to service-ready condition:

1. Reverse engineering — 3D scanning and dimensional analysis of the worn component
2. Pattern and tooling design — rebuilding the manufacturing references
3. Investment casting — producing the base geometry in nickel-based superalloy
4. HIP treatment — hot isostatic pressing to eliminate internal porosity and densify the material
5. CNC machining — achieving final dimensional tolerances
6. TBC coating — applying thermal barrier coating to specification
7. NDT inspection — fluorescent penetrant, radiographic, and ultrasonic testing
8. Dimensional and metallurgical inspection — verifying against original specifications
9. Documentation and certification — full material traceability and inspection records
10. Packaging and delivery — logistics from our facility to your plant

MXL2 upgrade pathway. For operators considering the MXL2 upgrade—which extends inspection intervals and improves output—the decision involves more than just ordering an upgrade kit. It requires understanding how the upgraded components interact with your existing hardware, what the baseline condition of your engine needs to be, and how to phase the upgrade to minimize downtime. We support operators through this decision with engineering assessments, not just parts shipments.

The European Context

Europe's GT13E2 fleet operates in a specific regulatory and commercial environment:

• Emissions compliance drives combustion hardware decisions, and aging burners can affect NOx performance. Refurbished or remanufactured combustion hardware, produced to the right specifications, can restore emissions margin without a full OEM service engagement.
• District heating economics mean that downtime in winter months has disproportionate commercial impact. Spare parts availability and refurbishment turnaround time directly affect winter readiness.
• Asset life extension decisions are being made across the fleet as operators evaluate whether to invest in life extension or plan for replacement. The quality of spare parts and refurbishment support directly affects the economics of that decision.

A Partner, Not Just a Supplier

The difference between a parts supplier and an engineering partner is simple: a supplier ships you what you ordered. A partner helps you figure out what you need to order, and why.

For European GT13E2 operators, that distinction matters. When you're planning a major inspection, evaluating an upgrade, or managing a forced outage, you need someone who can engage at the engineering level—not just process a purchase order.

Next Steps

Send us your engine serial number and your upcoming maintenance scope. We'll provide an engineering assessment of what we can support—and how quickly.

Contact: Alex | +385 99 832 2454 | alex@zurnpower.com