Visual TestingVisual testing is the most basic and common inspection method involves in using of human eyes to look for defects. But now it is done by the use special tools such as video scopes, magnifying glasses, mirrors, or borescopes to gain access and more closely inspect the subject area.

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Remote Visual Inspection (RVI):

When human eye is impossible to reach the targeted objet then some special tools are used and it is called the Remote Visual Inspection (RVI), which also known as

Borescopic Inspection

Industrial Endoscopy

Video-Borescopic Inspection etc.

What we look in Medical Endoscopy Test

What is the Difference in Medical Endoscopy and Industrial Endoscopy?

Nothing Special, Both are Remote Visual Test.

Medical Endoscopy

Industrial Endoscopy

Visual Testing Equipments

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Fig: Advanced Videoscope

Fig: Videoscope

Fig: Magnifying glass

Fig: Borescopes

Fig. Microscope

Applications

It can be applied to a number of areas including:– Aerospace – Power generation – Oil and Gas – Chemicals– Automotive – Construction – Security – Manufacturing – Pharmaceutical etc. – Research and education

It is also used for:•Gas turbine blades •Blade cooling holes •Boiler tubes •Turbine rotor bores •Steam pipework •Boiler headers •Valves •Steam chests

Boiler Case Study

This is an Oil Tanker Auxiliary Boiler. The boiler cant be ran due to its leaky tube. There were 400 tubes. Two defective tubes found by Endoscopy Inspection. And then it is sealed from both side.

Turbine Case Study#1Severe Crack found Turbine

Nozzle of Alstom 34.5MW Turbine after the Endoscopy Inspection.

Turbine Case Study#2GE 9E Gas Turbine is not running due to lack of sufficient fuel

pressure. After a details endoscopy inspection a plastic cap was found.