Non-Destructive Testing for Critical Pressure Vessels

Phased array ultrasonic testing and active thermography to detect internal microfissures and structural anomalies.

Why PAUT & Thermography Outperform Conventional NDT

Our phased array ultrasonic testing and active thermography detect internal microfissures and structural anomalies that standard methods miss. Here is what sets us apart.

Volumetric Resolution

PAUT uses multi-element probes to generate cross-sectional images, revealing tight microfissures and laminations that conventional UT cannot resolve. Defect sizing accuracy improves by 40% compared to single-element techniques.

Non-Contact Screening

Active thermography applies controlled heat pulses and records thermal decay patterns. It detects disbonds, corrosion under insulation, and early-stage fatigue cracks without surface preparation or couplant.

ASME & API Compliance

Every inspection follows ASME Section V and API 650 standards. Our reports include 3D defect mapping, remaining life estimates, and repair recommendations accepted by regulatory bodies.

Minimized Downtime

Combined PAUT and thermography campaigns reduce vessel downtime by up to 60%. We coordinate inspections during planned outages, delivering a complete integrity assessment in a single mobilization.

Field-Proven Reliability

Over 200 pressure vessel inspections completed across refineries, chemical plants, and power generation facilities. Our defect detection rate exceeds 98% with fewer than 2% false positives.

Data-Driven Reports

Each inspection produces a digital report with defect depth, size, and location mapped to vessel coordinates. Clients receive actionable data for repair planning, not just pass/fail results.

Why choose our NDT approach

Every inspection method is selected for a specific defect type and operating condition. Here is what each technique delivers in practice.

1

Phased array ultrasonic testing

Multi-element probes generate cross-sectional images that reveal tight microfissures and laminations in pressure vessel walls. The method follows ASME Section V and provides 3D defect mapping for in-service vessels and new welds.

Detects flaws conventional UT misses
2

Active thermography

Controlled heat pulses combined with infrared recording expose disbonds in cladding, corrosion under insulation, and early-stage fatigue cracks. Pulsed and lock-in modes quantify defect depth with minimal surface preparation.

Large-area screening without contact
3

Combined integrity assessment

Bundling PAUT, thermography, and visual inspection into a single campaign delivers a complete structural health report. The final document includes defect sizing, remaining life estimates, and repair recommendations for refineries and chemical plants.

Minimizes vessel downtime
4

High-temperature capability

Our PAUT probes and couplants are rated for surfaces up to 500°F, allowing inspection during production runs without cooldown. This reduces shutdown windows and keeps critical vessels online longer.

Inspect without stopping operations
5

Data-driven reporting

Every inspection generates a digital record with defect coordinates, size measurements, and comparison to previous scans. Reports are delivered in PDF and CSV formats for integration with your maintenance management system.

Traceable records for compliance

Trusted by Industry Leaders

Our non-destructive testing methods are relied upon by top engineering firms for critical pressure vessel inspections.

★★★★★ Exceptional PAUT Accuracy

Petsuregroups detected a 0.8mm microfissure in our reactor vessel that conventional UT missed. Their phased array report was clear and actionable. Saved us from a potential shutdown.

★★★★★ Thermography Saved Time

We needed a rapid corrosion-under-insulation scan across 200 meters of piping. Active thermography delivered results in two days, not two weeks. The defect depth mapping was spot on.

★★★★★ Full Vessel Integrity Report

The combined PAUT and thermography assessment gave us a complete picture of our aging pressure vessel. The remaining life estimate helped us plan maintenance without emergency outages.

★★★★★ Professional & Thorough

Their team followed ASME Section V strictly. The 3D defect mapping made it easy for our engineers to understand the exact location and size of each anomaly. Highly recommended.

Frequently Asked Questions About NDT for Pressure Vessels

Clear answers about phased array ultrasonic testing and active thermography for detecting internal microfissures and structural anomalies.

What types of defects can PAUT detect in pressure vessels?

Phased Array Ultrasonic Testing (PAUT) is highly effective at finding tight microfissures, laminations, inclusions, and other volumetric anomalies in critical pressure vessels. It provides detailed cross-sectional images that reveal defects conventional UT might miss, especially in thick-walled or high-temperature components.

How does active thermography differ from traditional thermal imaging?

Active thermography applies a controlled heat pulse to the test surface while an infrared camera records the thermal decay pattern. This reveals subsurface disbonds, corrosion under insulation, and early-stage fatigue cracks that passive thermal imaging cannot detect. It requires minimal surface preparation and works well on complex geometries.

Which standards do your NDT inspections follow?

Our PAUT inspections comply with ASME Section V and API 650 standards. Active thermography procedures follow ASTM E2582 and ISO 10880 guidelines. Every inspection includes full data reports with 3D defect mapping and quantitative sizing.

Can you inspect vessels while they are in service?

Yes. PAUT is well-suited for in-service vessels because it can be applied through coatings and at elevated temperatures. Active thermography is also non-contact, so it can be performed on operating equipment with proper safety protocols. We coordinate with your maintenance schedule to minimize downtime.

What information is included in the final inspection report?

Each report contains defect location, size, and depth measurements; 3D defect mapping images; remaining life estimates based on flaw severity; and clear repair recommendations. Reports are delivered in PDF format with raw data available on request.

Contact our NDT team for a consultation →
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