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Dolphin G3™ Brochure


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How it Works

Dolphin G3™ guides the operator through all the steps necessary to carry out a job simply and efficiently with minimal training requirements.

1. Job setup | Tube Sheet Mapping

A photograph or schematic diagram of the heat exchanger is uploaded to the system in order to create a map of the tube sheet. Each of the tube openings is assigned a number. This enables the system to create a graphic representation of the heat exchanger and to keep track of which tubes have already been measured, allowing the technician to work in a systematic manner.

2. Setup of Inspection Parameters

Using Dolphin G3’s intuitive user interface, the technician sets a few inspection parameters related to the physical attributes of the tubes. These include the tube's length, diameter and wall thickness, as well as the probe adaptor's length and diameter.

tubesheet 2 178x120             

3. Taking the Measurements

Using the system’s compact handheld device, the technician begins to inspect the tubes in accordance with the tube sheet map. The probe is inserted into each tube opening for approximately 10 seconds. It emits an acoustic pulse and then measures the resulting reflections using APR Technology. LEDs on the probe indicate when the measurement is complete and the software guides the technician to the next tube to be measured.

4. Establish Reference Measurement and Set Inspection Thresholds

Once all of the measurements have been taken, the system calculates a reference measurement based on an intelligent average of the measurements, taking into account statistical deviation and the presence of ambient noise. Any measurement beyond that deviation is a potential flaw. In addition, the system enables the heat exchanger owner to determine thresholds for each type of flaw depending on the sensitivity of the given application (e.g., percentage of wall loss, blockages, etc.). Only those measurements that exceed the defined threshold are reported as flaws.

5. Data Analysis and Report Generation

The raw data (i.e., signals) collected by the system is interpreted and presented to the technician for review and verification. This entire process is performed automatically by the system software. The system then generates a final report (PDF) containing summary information, including tabular reporting and screenshots of the detected flaws.