Inside Pipe Grinder Robots / Inside Pipe Inspection Robots

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Pipe Inspection Robot, Inside Pipe Grinder

Purple Engineering is the Australian operator of Inside Pipe Grinding Robots / Inside Pipe Inspection Robots.

Pipe Robots for Internal Machining & Inspection of Pipe Systems.
Inspection of Piggable, Unpiggable, Buried & Complex Pipelines.

Our German Made Pipe Robots are perfect application for:

Difficult externally access like buried pipelines
Complex and / or non-piggable structure
Cooling Pipe System (NPP, TPP)
Connection pipes between storage tanks in Refineries
Pressure Lines of Hydroelectric Power Plants
Pumping Lines (Gas, Oil, Water etc.)
Municipal Sewage/ Tap Water Pipe Systems etc.
Pipe Diameter From 75mm up to 1.2m (3" to 48")

Our Inside Pipe Robots are available with different modules such as:

1) Inspection and Non-Destructive Testing Modules:

(a) Video/Laser module for visual inspection

Pipe Inspection Robot, Inside Pipe Video

For ordinary visual inspections of inner surfaces or to demonstrate the integrity of specific components, usually a video/laser-module will be used.

It includes a tiltable CCD high resolution colour camera with picture resolution >460 TVL, 10x optical zoom, automatic-manual focusing and a powerful light source (ring of LEDs) for particularly illumination.

The unit is also fitted with a point laser which is integrated into the 360° rotating unit and can therefore reach every point on the inner circumference of the pipe.

Spot-measurements with an accuracy of 0.1 mm are possible and therefore an evaluation and classification of the camera image.

Additional the laser is also made to prove/check inner pipe profile/ovality (2D plot).

(b) Laser module for axial profile scanning and measurement of welding seams

Pipe Inspection Robot, Inside Pipe Video

Mainly used during the assembly of pipelines for nuclear power plants which are under construction, thereby this special axial laser scanning tool documents the quality of the ground welding seams of joined pipelines.

E.g. for an actual project the angle of the grinded and polished ground welding seams resulting from the linear misalignment of two pipes must not exceed 7°.

By using a point laser for measuring the ground welding seam, with the aid of two highly-precise centering units the laser is centered in the grinded welding seam region and travels over the welding seam propelled by an axial motor.

At the same time a laser profile is recorded in the software and the condition of the welding seam can be examined by an additional high resolution CCD colour camera.

An integrated rotary unit between the two centering units allows to position the laser measurement point at the required location in the pipe and to take measurements at several points of the welding seam.

Four or more axial scans are envisaged for measuring one welding seam, the first axial scan is carried out at 0°, the second at 90°, the third at 180° and the fourth at 270°, so that the welding seam can be scanned all the way round.

With the help of the software the individual recorded laser profiles can be called up and the angle of the ground welding seam with its automatically calculated value will be displayed directly in the laser profile by two cursors.

(c) Ultrasonic module for wall thickness measurements and detection of pitted areas

Pipe Inspection Robot, Inside Pipe Video

In order to achieve a complete wall thickness measurement an ultrasonic inspection module can be used to detect pitted areas inside and outside of echo capable materials.

Fitted with a pivoting sensor arm, the module rotates continuously while travelling through the pipe.

A gimbal suspension system allows the sensors to be guided orthogonally to the surface being inspected.

To provide the echo couple medium a special feature is an independent continuous water supply to the ultrasonic sensor.

(d) SLOFEC module for sensitive detection of material reductions

Inside Pipe Inspection Robot, Material reduction Inside Pipe inspection

The SLOFEC inspection technique uses the eddy current principle with superimposed DC field magnetization. A reduction of the wall thickness, e.g. by a corrosion pit will result in a concentration of the magnetic fields in the remaining wall and resulting in an increased magnetic field strength above and around the defect.

Due to the phase spread between subsurface (outside), surface (inside) and other indications the SLOFEC Operator is able to distinguish them from each other.

Ferromagnetic pipe systems with non-conductive and non-magnetic coating, like rubber or paint are also testable.

The SLOFEC inspection robot was developed in cooperation with the company Kontrolltechnik.

2) Machining Modules

(a) Grinding and polishing module

Inside Pipe grinder Robot, Inside Pipe Grinder

Particularly to be used to carry out work on the inner pipeline surface e.g. to renew strongly stressed points or to grind the various safety-relevant welding seams of the pipelines system in the primary circuit from inside during the assembly of the pipelines etc.

Through specific grinding of the internal weld roots the quality of the pipe will be increased (fatigue life), misalignment conditioned and inspection of the welding seams during recurring tests enormously facilitated.

An accuracy of 0.1 mm makes it possible to produce local areas point by point according to precisely defined geometries.

The grinding module comprises an electric-mechanical clamping/centering system, an on-board grinding camera, a powerful three-phase current motor with a grinding disc, a rotating unit with a rotating angle of 380° and a radial stroke for the grinding motor.

(b) Vacuum cleaning module

Inside Pipe vacuum Robot, Inside Pipe cleaner

Based on the same principle as the grinding modules, the vacuum cleaning module cleans the pipeline e.g. after grinding.

A suction unit with a suction tube is mounted on the rotating unit of the vacuum cleaning module.

The suction tube is moved in the direction of the pipe wall via a stroke while the cleaning process is monitored by a suction camera.

Therefore it is possible to specifically approach and provide suction at any point in the pipe.

(c) Coating cleaning module

Inside Pipe coating Robot, Inside Pipe coating

Internally coated pipes are required everywhere where aggressive or abrasive media can attack the pipe when in operation.

Using the coating robot, a 1 mm coating can be applied evenly and in a controlled manner to pipe sections measuring up to 100 m.

While travelling steadily in reverse, an epoxy coating is sprayed via a rotating spray nozzle to the inner wall of the pipe.

The epoxy coating comprises a solvent-free dual-component mixture which is supplied from outside via a tempered hose.

Please feel free to contact Purple Engineering on (+61) 1300 62 4020. We are looking forward to hearing from you.