Conventional NDT Services Africa

Non-destructive testing (NDT) is defined as wide spectrum of analysis techniques used in science and industry to evaluate the properties of material, component or system without causing damage. DARLSCO has written procedure(s) and confirmed the qualification requirements of different methods, level and sector leading to issuance of Inspection Report/ Certificate. The competency of DARLSCO Engineer(s)/ technicians approved written practices and industry standards included but not limited to CP-189, SNT – TC- 1A, ASME, API, NACE, ANSI & AWS- CWI.

All the NDT equipment are calibrated by DAC approved laboratory and maintained in good condition to be utilized for any project. The method/ techniques are accredited by Dubai Accreditation Centre (DAC) included but not limited to Penetrant testing (PT), Visual and optical testing (VT), Magnetic Particle Testing (MT)/ MPT, Ultrasonic testing (UT), Ultrasonic Flaw Detection (UT-UFD), Electromagnetic testing/ Eddy Current testing (ET)/ECT - Welding Inspection/NDT Without Paint Removal, Positive Material Identification (PMI), Radiography, Leak Testing, Acoustic Emission Testing(AE). In addition, Vacuum box testing, hardness testing, ferrite testing, anchor chain Inspection, Ferrite testing, Heat treatment ( PWHT & Stress relive).

Lifting equipment is any machine/device, whether powered, manually, mechanically or electrically, able to move, either vertically or horizontally or both, or suspend loads, including the supporting structures and related parts used for lifting and lowering loads. DARSLCO is competent to carry out Initial Approval ( Design Review, Inspection of manufacturing process and Initial Inspection, Periodic Inspection and Major Inspection ( Design review to extent major repairs effect the total system, Repair Inspection, Visual Inspection, Functional test and proof Load test). The Inspection, Testing and Certification standards are BS 7212, BS 7121, BS EN 1808, BS EN 115-1+A1, BS EN 81-1+A3, BS 5639, BS ISO 22915-8, BS 3726, BS EN 280, BS 8460, BS EN 13157+A1, ISO 4308-1, BS EN 81-2, BS EN 60204, IEC 529, IEC 60947-5-1, LOLER and relevant standard(s).

   Inspection, Testing and Certification - Vehicle Lifts/ Car Lifts ( two Post, Four Post, scissor Lift, & Pit lift)

   Inspection, Testing and Certification Cranes (Tower, Jib , mobile crane, crane, Truck mounted crane, Overhead cranes (EOT) and their supporting runways, Forklift

   Inspection, Testing and Certification - Pedestal crane, hoist

   Inspection, Testing and Certification - Wall/Pillar Cranes, Derricks, Swing Jibs and Davits

   Inspection, Testing and Certification- Winches, Hoists (air and electric), Crabs, Chain Blocks, Lever Hoists, Jaw Winches

   Inspection, Testing and Certification - Pull Lifts, Trolleys, Dozers , BOB CAT, Trolley Jack , Pellet Trucks, Man Lifts , Window Cradles , Escalators & Elevators

   Inspection, Testing and Certification - self loader, side beam

   Inspection, Testing and Certification Powered Working Platform / Mobile Elevated Working Platform(MEWP) including not limited to Man lift

   Inspection, Testing and Certification - Suspended man basket

   Inspection, Testing and Certification - Engine Lifting Jacks , Material Lifts

   Inspection, Testing and Certification - lifting jack ( pneumatic and hydraulic)

   Inspection, Testing and Certification - Chain block, Pulley, mobile or movable jack

   Inspection, Testing and Certification - Calibration of test weight(s) and issuance of Certificate

   Inspection, Testing and Certification - Derrick, Barges, Life Boat Davits systems, Offshore/ Land Rigs and vessels

Dye Penetrant Test (DPT)/ Liquid Penetrant Test (LPT)/ Physical Testing (PT)

DPT/ LPT/PT is the method of material testing to detect cracks and is one of the oldest method. DARLSCO is capable of providing any type of DPT/ LPT to suite the client’s requirement based on ASME/ AWS and any other applicable and relevant standards.

The major limitation of LPT says that it can detect only imperfections that are open to the surface/ ambient air. Surface Roughness is a factor inhibits the effectiveness of LPT. False indication can be produced due to rough or porous surfaces. The test depends on liquid's effectively wetting the surface of a solid work piece of specimen, flowing over the migrating into cavities that are open to the surface/ambient air, which is Closely related to wetting ability is the phenomenon of capillary rise or depression.

The procedure to carry out LPT are included but not limited to Surface Preparation, Application of Penetrant, Removal of excess penetrant, Application of developer, Observation and Reporting.

Pressure Vessels, Boiler & Piping

A pressure vessel is a closed container designed to hold gases or liquids at a pressure substantially different from the ambient pressure. The pressure differential is dangerous and fatal accidents have occurred in the history of pressure vessel development and operation. DARLSCO has specialized Engineer(s)/ technicians to carry out the Inspection, Testing and Certification of Air Compressor, Air Receivers, heat exchangers, accumulators, industrial pressure vessels covers, auto clave and boilers.

DARLSCO competent to carry out Functional test and safety accessories test of any pressure equipment. DARLSCO conducts periodic Inspection includes but not limited to Functionality test, Internal test and Integrity test ( to examine the external and internal surface conditions), Proof Test( to evaluate the resistance of pressure performed using Water (hydrostatic test ) / Air ( Pneumatic test) & other Non-destructive Testing (if required) recommended standards as approved by Dubai Accreditation Centre (DAC), Dubai Municipality (DM) & Dubai Civil Defense (DCD) of the pressure equipment.

Common Failures of Pressure Vessel

The common failures included but not limited to

   Error in design and construction

   Improper operation

   Corrosion

   Failure to inspect properly

   Lack of preventative maintenance

Unfired Pressure Vessel - Air Receiver

Pressure Vessels are classified into Unfired and Fired vessels and DARLSCO competency included but not limited to

   Inspection, Testing and Certification of Air Receiver including Air Compressor

   Inspection, Testing and Certification of Calorifier

   Inspection, Testing and Certification of all types of Pressure Equipment

Fired Pressure Vessel - Boiler

External Inspection : As complete an examination as can be reasonably made of the external surfaces and safety devices while the boiler or pressure vessel is in operation. The safety appliances included but not limited to Rupture disk device, Safety relief valve, Temperature limit control, Pressure limit control, Major gas train controls, Low water cutoffs, Flame supervisory unit (igniter), High and low gas pressure switches, Trial for ignition limiting timer (15 seconds). The pressure relieving devices are traceable to National and International directive and the common used Pressure Equipment Directive 97/23/EC (PED). DARLCSO carry out/ performs

   Inspection, Testing and Certification of Pressure Relief Valve

   Inspection Testing and Certification of Pressure Gauges

   Inspection, Testing and Certification of Temperature gauges

Piping

The Inspection, testing and Certification of piping included but not limited to ASME B31.1, B31.3, B31.4, B31.8, B31.12 Piping Codes

Wind turbine Inspections

The inspection of wind turbines will be carried out during all phases of project lifecycle. The legal requirement will be taken care to ensure compliance. DARLSCO offers complete range of inspection services for onshore and offshore wind turbines and their components. Our inspections provide completely objective and independent information included but not limited to the following:

INSPECTION, AND VERIFICATION - COMPLIANCE

The stages of inspection included but not limited to

   Manufacturing process - components, and sub-components based on the drawings, and other technical details (rotor, nacelle, tower, foundation and electrical system). The Inspection is widened to onshore and offshore facilities – including offshore substation platforms

   Storage and / or transport of equipment

   Inspection, Testing and Certification of Temperature gauges

   Assembly of assets

   Commissioning, and progress of the project

   Planning and evaluating maintenance

   Investigating of damage - Inspections can cover all components of wind power generation systems