Inspection Services

Service Details:

Remote Visual Inspection (RVI), involves visual inspection of the components. No special tests are carried out, as the inspection consists of observation by the naked eye. Certain accessories can be used for carrying out inspection, such as flashlights, mirrors, lenses, magnifying glasses, etc.

RVI includes use of remote visual aids such as borescopes and videoscopes. These scopes consist of probes at the ends of optical or digital cables. The probes are inserted into areas which are otherwise inaccessible. They can be scanned and articulated as per requirements. The images seen by the probes are replicated on screens that are held by the operator, which enables the operator to remotely inspect all sorts of components. Additionally facilities for capturing images and recording videos are also available. In some cases, it is possible to livestream the borescope images via Bluetooth or WiFi connectivity to remote locations such as offices.

Service Details:

Welding inspection involves inspection of various aspects of a weld. Inspection can be carried out before, during and after the completion of the weld. Such inspections include joint preparation, procedure verification, settings, methods used, inter-pass inspection, depth of penetration, inter-pass and base metal fusion and so on.

Welding inspection can be carried out visually, as well as using NDE techniques of RT and UT. Welding inspection is usually carried out based on procedures and methods as per the requirements of various standards such as ISO, ASME and AWS.

Service Details:

Internal Rotary Inspection System (IRIS) is a special type of Ultrasonic Testing technique used for inspection of pipes and tubes. Water is used as a couplant. The tube to be inspected is flooded with water. A transducer generates an electronic pulse parallel to the axis of the tube being tested. A rotating mirror directs the ultrasonic wave into the tube wall. The mirror is powered by a water-driven turbine, with the water being pumped into the tube for flooding.

Parts of the waves are reflected by the ID and OD. Knowing the velocity of ultrasonic waves in the material of the tubes, the wall thickness can be calculated by determining the time required for both waves to be reflected from the corresponding walls. As the probe is pulled, the rotating mirror develops a helical scan path. IRIS can be used for boiler, shell-and-tube and fin-fan heat exchangers.

Helium Leak Testing (LT), involves use of Helium Gas to check for any small leaks or porosities in components. Usually, LT is carried out for pressure vessels and other critical components that contain liquids or gases for storage or use. Helium, being the lightest inert gas, can easily be handled, and be detected in cases of leaks.

Non-Destructive Testing (NDT) services evaluate material, component, or system integrity and properties without causing damage, using techniques like radiography, ultrasound, magnetic particle, and eddy current to detect flaws, ensure quality control, monitor asset health, and maintain safety and compliance for critical infrastructure, from pipelines to aerospace parts. These inspections provide data for informed asset management, allowing for preventive maintenance and extending the life of in-service equipment, making them vital for manufacturing and operational reliability. 

Industrial Radiography (RT) involves volumetric testing of various metallic and non-metallic components. RT is able to determine surface and subsurface discontinuities, such as cracks, porosities, lack of weld penetration, lack of weld fusion and so on. It can be used for welding, casting as well as forging. A variety of different items can be inspected with RT. It requires a source of radiation, usually gamma rays or X-ray, films or detectors, and developing media, such as chemicals or scanners. It provides a permanent record of the test, and can be evaluated as per the requirements of various codes and customer specifications. RT can be done both, at site as well as in a designated laboratory.

RT can be carried out using the following processes: Iridium (Ir-192), Cobalt (Co-60), Selenium (Se-75), X-Ray, Close Proximity Radiography (CPR), Computerized Radiography (CR), Digital Radiography (DR).

Every surface has at least a bare minimum roughness. Roughness plays an important role in determining how an object interacts with its environment. Rough surfaces wear quickly and have a higher frictional coefficient. Roughness is useful for gripping (by hand) purpose as well as for adhesion. Indeed, a completely smooth surface will not promote adhesion, meaning that coatings cannot be applied. Similarly, a smooth surface is difficult to grip. A controlled surface roughness is usually preferred.

 

Surface roughness measurement involves manual comparison of the roughness of a given surface with that of a standard surface. The comparators can be of a contact type with a diamond stylus or optical type. Values available include average of deviations from mean line (Ra) and maximum peak to valley height (Rz).