Projects Executed
MAINTENANCE, OVERHAULING & LOAD TESTING OF ELECTRICAL HOISTS
In a recently concluded project, our team undertook the maintenance & certification of Hoists for a client. All hoists and load carrying appliances are required to be load tested post overhaul / servicing and certified by a Third Party to ensure safe operations. The lifting equipment/ gears are required to be maintained and regularly load tested in accordance with BS 2853/ ASME 30.16.
Our team identified various defects during site survey and proposed a suitable innovative plan including strip-down inspection followed by load testing witnessed by a Third Party. To obviate impact on the on-going operations of the running equipment and movement of hoists, the work was executed utilising mobile scaffolding system.
Scope of the Work entailed: –
- Dismantling of 5T electric hoists (4nos) from beams at a height of 12–15-meter height including strip down inspection followed by overhauling at Workshop
- Dismantling/removal followed by installation of new festoon system for cable
- Surface preparation & painting of runway beams
- Load testing & TPI certification of hoists along with beam at site witnessed by BV inspector
- Testing/ inspection of loose lifting gears used at the site and certification
Post overhauling & load testing of the hoist’s, the system was operationalized & all certificates handed over to the client in good order. Dahra global team is confident of undertaking similar works for repairs, maintenance overhauls of various hydraulic/electric systems for any client in Qatar.
OVERHAULING OF SWIMMING PLATFORM OF YACHTs
Our maintenance team undertook repairs of Swimming platforms for two Yachts during dry-docking at Qatar. The client reported sluggish & uneven rising of the platforms necessitating complete strip-down inspection & overhauling of the hydraulic system cylinders, associated valves & piping. Dahra Global technical team localized the defect related to sluggish response to leakages from the control valves and hydraulic cylinders. Defect rectification entailed dismantling of the hydraulic power pack & components to shop floor followed by overhaul and pressure testing at shop floor to prove efficiacy of repairs.
Post overhauling and installation, normal operation of the platform was restored without any defects. This effort has enriched our experience in undertaking similar works for repairs, maintenance & overhauls of various hydraulic systems for any client in Qatar.
SUPPLY AND INSTALLATION OF SIEMENS SIPROTECH DISPLAY UNIT
One of our esteemed client’s requirement for defect rectification of a 11 KV Substation Protection Relay control and monitoring display unit was executed in a prioritized manner.
The scope entailed supply of items followed by replacement of defective display unit (Siemens Siprotec display unit 7SD5). Even in the present scenario of COVID-19, Dahra Global was able to import the required spares directly from OEM (Siemens) and our team of service engineers successfully replaced the defective component.
Post installation, the functional checks & commissioning was carried out by carrying out all tests of all relays on the display unit. With execution of such project, our teams are confident of undertaking similar works for any client in Qatar.
Survey of Floating Dock at Shipyard
Our team of marine surveyors executed the Annual Deck Deformation survey for one of the largest floating docks in Qatar. The survey requirement was to physically (manual method) ascertain the condition of the deck and measure the deck indentations. The survey was impacted by frequent requirements for docking as well as harsh marine weather conditions. However, despite the odds our survey complete the job successfully involving preparation of a comprehensive survey report, marking of deformations/ indents on Acad drawings & compilation of a photo album, to the satisfaction of the Client.
Supply and Installation of EPT-TX and EPT-RX for 11 KV Soft Starter
One of our esteemed client’s requirement for defect rectification of a 11 KV Soft Starter was executed in a prioritized manner.
The scope entailed supply of items followed by replacement of defective components viz. Electronic Potential Transformer Transmitter unit (EPT-TX) and Electronic Potential Transformer Receiver (EPT-RX) on the Soft starter of three heavy duty Compressor drive motors. Even in the present scenario of COVID-19, Dahra Global was able to import the required spares directly from OEM (Germany) and our team of service engineers successfully replaced the defective components, with minor modifications to suit on-site requirements.
Post installation, the functional checks & commissioning was carried out via complete starting sequence of the soft starter, to the satisfaction of the customer. With execution of such works, our teams are confident of undertaking similar works for any client in Qatar.
SERVICES FOR ENGINE ROOM CONTROL, AUTOMATION SYSTEMS DEFECTS
Dahra Global Technologies undertook defect analysis and rectification services for Engine & Boiler controls, Switchboard earthing fault & HVAC controls onboard Bulk carrier vessel sailing under Flag of Marshall Islands at Mesaieed port. The turnaround call for the vessel was 24-hours only. Our team of automation engineers attended the call and aided in defect identification and subsequent rectification of following defects: –
- Alarm monitoring system for Engine Control System
- Boiler low-low level alarm
- Engine room & AC room ventilation fan control
- Main engine exhaust gas temp. & viscosity controller sensor feedback to ECR
Our engineers attended the defects and provided a detailed report on the nature of defect, defect remedial methodology & spares required. This report enabled the crew to source the correct spares and rectify above control defects. Our automation engineers are capable of correct fault diagnosis leading to expeditious defect rectification with their vast marine experience, enabling the vessel & sea farers to meet their operational roles.
OVERHAULING OF CRANE ONBOARD WOODEN DHOW
“Maintenance” keeps machinery up to date and in smooth running condition, irrespective of size. Efficient maintenance enhances life and ensures equipment performance at its optimal level with minimal costs. Dahra Global has a dedicated team for undertaking maintenance of critical equipment with / without OEM support. In the present scenario of COVID-19, wherein OEM support was unavailable, Dahra Global technical team could analyse the defect, provide innovative solution, provision spares and thereafter execute the job within 02 days including dismantling, overhauling, final pressure testing & commissioning for the Crane.
Scope of the Work entailed: –
- Rectification of defect regarding sluggish response during operation and leakages from control valves
- Flushing & Overhauling of complete hydraulic power pack system and control valves
- Supply of customised crane rope slings to enable extended lengths during operations
Post overhauling and installation, normal operation of the crane was restored. Dahra global team is confident of undertaking similar works for repairs, maintenance & overhauls of various cranes and their hydraulic systems for any client in Qatar.
of Yacht Crane
Maintenance and Load testing of Yacht Crane
Our service engineers recently carried out Annual Maintenance works of a 5Ton crane on a Yacht. The scope included replacement of wire rope, swivel block & complete maintenance of the crane hydraulic and control systems. Close coordination by the sales team resulted in expediting receipt of OEM spares from Europe despite COVID-19 lockdown. Post completion of maintenance, the crane was successfully load tested in the presence of Client. The task of Maintenance and Load testing was accomplished in a span of 06 hours enabling Client to meet the sailing commitment of the Yacht.
Support Services - Arleigh Burke Class Destroyer at Qatar
An US Navy Warship (Arleigh Burke-class destroyer) sought assistance for Installation of a new clutch assembly for their Gas Turbine Propulsion Plant. Our team of marine specialists executed the task entailing “shifting of the clutch assembly” from ashore to the “Engine room” of the ship (A precise lifting plan was prepared to avoid damage to sensitive communication antennas fitted on the Superstructure of the warship). Subsequently, we provided assistance and guidance to the vessel crew in installation of the unit on the Gas turbine. The complete task was successfully executed in a span of 10 hours. Additionally, our team overhauled six pressure relief valves thereby enabling the warship to meet its operational deployment commitments.
MAGNETIC COMPASS DEVIATION CHECKS FOR GENERAL CARGO VESSEL
Magnetic Compass is a key Navigational aid ensuring safe navigation. Reliable performance of the compass requires inspections at normal intervals. In accordance with the requirements laid down in SOLAS Chapter V, Annex XIII, the magnetic compass inspection & deviation checks entail inspection of components, liquid followed by checks at harbor and sea. In case deviations are observed beyond permissible limits, the same have to be adjusted by the master or by a qualified and certified compass adjuster. One such activity was entrusted on Dahra Global for a general Cargo Vessel on call at Hamad port sailing under the flag of Liberia. The vessel had only a 24-hour turn around call at the port.
Dahra Global was able to facilitate re-validation of the Deviation Card after checks of the compass deviation book held and maintained onboard, with assistance of a qualified Third Party Inspector within 01 day & also undertook training of the vessel crew for filling of compass liquid.
REPAIRS TO MAIN SWITCHBOARD ON CONTAINER VESSEL
One of the Maersk Liner Container Carrier vessel’s had an emergency requirement of repairs to its Main Switchboard, which was damaged due to electrical fire. The job warranted Dahra Global to mobilise our maintenance team on short notice to investigate the damage & ascertain scope of work.
The scope entailed removal & cleaning of nearly half of the main busbars, replacement of two complete sections of starter panels comprising of breakers, contactors & relay units for 14 pumps. Further, inspection of all power & control cabling of the switchboard including providing a modification to enable extending damaged control cables to the starter panels was undertaken. This avoided additional time for procurement & laying of new cables.
Our team of Busbar & Electrical technicians accomplished the above task in a short span by executing the works (24 x 7) for 05 days and completed the testing & commissioning in 02 days. Our timely execution, enabled the vessel to sail with its cargo to next port of call. Dahra Global continues to make major in-roads into the Qatar Marine sector exhibiting our prowess in maintenance and product support to our clientele.
Inclining Experiment of Trimaran Ferry Craft
One of our clients approached us for a solution to enhance the passenger capacity onboard the Ferry Craft. The solution entailed conduct of an “Inclining Experiment” of the vessel followed by preparation of the “Stability booklet” for approval from concerned authorities. Our engineers undertook detailed measurements onboard the craft, prepared a detailed test procedure for the experiment along with calculations for proposed weights. Thereafter, Dahra Global team of marine specialists ascertained the requisite “light ship” load for the vessel. All additional loads were marked and their locations (VCG, TCG & LCG) were marked and indicated on the GA Plan. Post completion, the pendulums & weights were placed as per Inclining Experiment procedure. The experiment was carried out early morning view wind speeds restrictions of less than 6-8 knots. The inclining experiment was completed within 03 hours.
Maintenance of 160 KVA UPS
A major Client sought our assistance for undertaking maintenance & services of their 160KVA UPS systems, which provided supply to the Main Servers of their main administrative building. The UPS system had not been serviced for more than 08-10 years and had additional challenges view majority of the components being obsolete. Further, this task required complete shutdown of main power supply for duration of the system maintenance. Accordingly, the work was planned and executed on a holiday to have minimum power disruption to the Client operations. Our engineers undertook replacement of all aged components & flashed the control modules of the UPS to enable proper functioning.
