HRSG & Boiler offline, or cold, inspections are a core O&M activity for thermal power and process plants. Only during a shutdown can internal pressure parts and high‑risk components be accessed and assessed in detail. Forced outages are costly, which makes early detection of service‑related damage essential. Regulatory and insurer requirements often mandate periodic inspections, yet minimum compliance may not reflect the true risk profile of a specific unit.
Modern duty cycles increase the need for rigorous offline inspections. Units that were originally designed for baseload are now started and stopped more frequently, which elevates thermal stresses and accelerates damage mechanisms such as creep, fatigue, corrosion fatigue, and FAC. A planned, risk‑based offline inspection provides the information needed to prevent repeat leaks, prioritize repairs, and schedule targeted NDE where it will have the greatest impact.
Tetra Engineering delivers independent, engineering‑driven inspections backed by over 35 years of experience and >1000s of HRSG inspections worldwide. We do not sell hardware, which keeps our recommendations objective and focused on asset integrity and outage readiness.
Our inspectors combine extensive field experience with Root Cause Analysis (RCA) and Remaining Life Analysis (RLA), ensuring that indications are connected directly to likely damage mechanisms and root causes. We align inspection scope with unit design, duty cycle, age, and operating history. Pre‑outage planning ensures access and safety prerequisites are in place, reducing rework and lost time. During execution, we communicate findings promptly, quantify risk where possible, and close out with prioritized, practical recommendations.
Your outage team needs decisions, not just observations. Deliverables typically include:
If needed, findings can feed directly into Root Cause Analysis (RCA) and Remaining Life / Integrity Assessments.
The borescope is an essential tool for inspecting of power plant components. Commonly used in high-value rotating power-plant equipment such as steam turbines, gas turbines and generators it is also extremely useful for checking the internal or to reach external surfaces of boiler and HRSG tubes and piping.
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Tetra Engineering is a engineering consultancy working in the power generation sector. We specialise in providing engineering and technical support to owners and operators of CCGT power plants, as well as other thermal plants. We have an office near Nice in France and our headquarters is in Connecticut, USA. We support projects worldwide and this includes hands-on fieldwork and back office engineering analysis...
