ABOUT US

AL RAFIDAIN Company established and outcome from the experience and work in the field of Electrical and mechanical Installations & Maintenance for more than 16 years in Yemen. AL RAFIDAIN has an engineering and a technical staff specialized and professional in Providing Power Generation Services, Maintenance of Boiler,Chiller, Water Well, Cooling Tower System, Electrical and mechanical Installations , Emergency Electrical and mechanical problems trouble-shooter , Cables Laying requirements for electrical work such as Electrical Distribution Panels ,Buildings Electrical Meters & Telecommunications , GSM Stations Electrical Cabinets & Installations , Finishing & maintenance , Air-Conditioning  Systems , Fire alarms & Fighting systems , Professional Ordinary & Security lighting , Automatic Gates & Doors, Electrical Control Panels, Piping System Construction, HVAC Water Distribution & Construction, Water Well Installation and Maintenance, Fabrication Construction and Installation, Cooling Tower & Chiller System Installation and Maintenance and Boiler System Installation and Maintenance.

AL-RAFIDAIN provides services that are suitable for the local, government, private, commercial/industrial sectors throughout during last 16 years.

FOUNDER AND DIRECTOR

Co-founder, Eng. Hussein Ali Mohammed Awied be this company that had a pride in the contract with major companies and Embassies operating in Yemen as Electrical Consultant & distribution for many companies for panels , Electrical equipment’s & transformers , cables and installer.

In 2005 Mohammed Ali Al Saeedi joins this company as a partner & manager to become later.

Al Rafidain Maintenance Contracts:

We have maintenance contracts in yemen with various capacitiesfor many customers,  such as:

  • DTF-S (Diplomatic Transit Facility – Sana’a).
  • PALM YEMEN.
  • AC4S .

AREAS OF EXPERTISE

  1. Provide 24/7 Power Generation and Operators

We provide qualified personnel, familiar with all the required services and tasks associated with operations and routine preventative maintenance of the generators, and who can operate the switch equipment controlling support-power systems.

  • Operate and perform routine operational requirements on the generators area.
  • Monitor and control the generator output to match the phase, frequency, and voltage of electricity required to supply the electrical panels.
  • Monitor and inspect the generator equipment’s visual readouts, and preventative maintenance indicators, to detect evidence of operating problems.
  • Personnel will assist in diesel refueling operations as required.
  • Personnel will maintain a log of all tasks performed and provide information records
  • Personnel will maintain a log of generator run-time to include start and stop date/time entries.
  • Personnel will maintain an orderly work area and clean any fluid spills as necessary.
  • Personnel will ensure generators are reasonably clean at all times, to include, but not limited to oil and grease on surfaces.
  • Personnel must allow the area to be accessible at all times.
  1. Operation & Maintenance of Electrical Infrastructure Systems

We provide qualified personnel, electrical engineer and one licensed electrician familiar with all the required services and tasks associated with routine operations and maintenance and scheduled preventative maintenance and inspections of the areas Electrical Infrastructure and Support Systems.  We will support emergency on-call services.

  • Perform daily operational and maintenance tasks and routine preventative maintenance on the area of Electrical Infrastructure Systems support equipment, based on a maintenance schedule.
  • Provide a representative to attend daily maintenance meetings with the management to coordinate all work (to include but not limited to PM, PMI, repairs, and upgrades).
  • Perform initial power inspection to identify and label incoming power lines, switchgear, distribution panels, sub panels, cables, transformers, phases, voltages, and amperages.
  • Inspect and perform load verification and label all equipment, panels, and circuits in all areas. Label all panels and circuits to include, but not limited to, control buttons, lights, and switches, piping, wiring, valves & motors.
  • Inspect and identify issues with all electrical systems, wiring, and panels ,HVAC systems, CATV systems, internet and communications systems, elevators, grounds maintenance, water wells and water supply systems, boilers and steam distribution checklists, lighting and systems, and fire safety systems.
  • Identify and install ground bus bars in all electrical closets, grounding panels, and cable trays.
  • Identify and correct all non-standard wire splicing
  • Identify and remove all abandoned and bypassed wiring.
  • Reinstall panel barriers on all distribution panels.
  • Identify and report any faulty.
  • Install all new parts and/or equipment per manufacturer’s specifications.
  • Install all mechanical pipes and electrical conduit plum and level on reasonably direct paths between termination points, and with the minimum of elbows, except where slopes are required.
  • Provide all warranty information on installed equipment in writing and include what is covered, start/end coverage date.
  • Responsible for all pre-engineering work for maintenance projects, and for the accuracy of all measurements.
  • Provide all chemicals necessary for the work required and associated Material Safety Data Sheets (MSDS)
  • Provide all equipment manuals for installed equipment.
  • Time lines must be submitted for all maintenance project work to include start date, milestones, progress dates against completion, and completion date.
  • Maintain accurate log to include, but not limited to, date/time and results of: visual and preventative maintenance inspections; equipment failures and/or decreased equipment operational status; notifications to management of sub-standard equipment operation and/or equipment failures; suggested/required repairs; and maintenance actions/repairs on equipment.
  1. Operation & Maintenance of Boiler, Hot Water, Steam Distribution Systems

We provide qualified personnel & a certified boiler engineer familiar with all the required services and tasks associated with operations and routine preventative maintenance of the Boiler, Hot Water and Steam Distribution Systems. We will support emergency on-call services.

  • Perform daily operational and maintenance tasks, and routine preventative maintenance on the Boiler and Steam facility’s equipment.
  • Perform operations and maintenance of all boiler/steam support equipment in the boiler room.
  • Submit a preventative maintenance schedule and outline all maintenance requirements for boilers, hot water tanks, and associated systems.
  • Provide a representative to attend daily maintenance meetings with management to coordinate all work, (to include but not limited to PM, PMI, repairs, and upgrades).
  • Assist in developing and implementing a boiler tuning program (fuel, oxygen, etc.)
  • Reinstall condenser loop into the hot water system, and maintain system.
  • Inspect boiler tanks, burners, control panels, steam equipment, and all associated equipment daily, and perform preventative maintenance and repairs as required.
  • Inspect hot water tanks, heating elements, and associated equipment daily, and perform preventative maintenance and repairs as required.
  • Inspect oil support systems and associated equipment daily, and perform preventative maintenance and repairs as required.
  • Inspect, maintain, and repair leaks, ruptures, and/or malfunctions of all pumps pipes, valves, and clamps/connections of boilers, hot water tanks, and associated equipment.
  • Inspect daily, and maintain and repair insulation on piping and the storage tanks.
  • Perform regular Blow down operations (removal of water from boilers) to reduce contaminant build-up and/or remove accumulated dissolved solids and/or sludge per established preventative maintenance schedule. [Note: Insufficient Blow down may lead to deposits or carryover. Excessive Blow down wastes water, energy, and chemicals.]
  • Perform routine checks of boiler water chemistry per established preventative maintenance schedule.
  • Inform the management when water treatment is required to prevent system scale and corrosion and to optimize cycles of concentration.
  • Assist in continually developing and implementing routine preventative maintenance inspections and maintenance programs on condensate equipment, tanks, and pumps.
  • Regularly clean and inspect boiler water and fire tubes per established preventative maintenance schedule to reduce scale buildup and improve heat transfer and system energy efficiency.
  • Monitor and inspect temperature and pressure levels and gauges, identify issues and report to the management.
  • Ensure all gauges are within manufacturer calibration ranges, and perform manufacturer recommended calibration steps.
  • Inspect, identify, and perform corrosion control on all associated equipment.
  • Time lines must be submitted for all project work to include start date, milestones, progress dates against completion, and completion date.
  • Submit a weekly activity report on the progress of maintenance activities and/or maintenance project work.
  • Spot inspections can take place at any time for any reason
  • Provide all chemicals necessary for the work required and associated Material Safety Data Sheets (MSDS), and must remove all excess chemicals/waste used in the process of the work performed from the compound.
  • Report all equipment issues, supply shortages, or other issues that impact task performance
  • We will provide all equipment manuals for vendor-installed equipment.
  • Responsible for all pre-engineering work for maintenance projects, and for the accuracy of all measurements.
  1. Operation & Maintenance of Chilling Tower (Closed Loop) System

We provide qualified personnel, familiar with all the required services and tasks associated with operations and routine preventative maintenance of the Chilling Tower System. We will support emergency on-call services.

  • Perform daily operational and maintenance tasks, and routine preventative maintenance on the facility’s Chilling Tower equipment.
  • Provide a representative to attend daily maintenance meetings with management to coordinate all work, (to include but not limited to PM, PMI, repairs, and upgrades,).

Chiller Units:

  • Perform chemical testing of system water. Treat as needed to ensure proper water chemistry and freeze protection.
  • Inspect gearbox for excessive wear. Repair or replace as needed.
  • Check control system and devices for evidence of improper operation. Clean, lubricate, repair, adjust or replace components as needed to ensure proper operation.
  • Check fan belt tension. Check for belt wear and replace if necessary to ensure proper operation. Check sheaves for evidence of improper alignment or evidence of wear and correct as needed.
  • Check variable-frequency drive for proper operation. Correct as needed.
  • Check control box for dirt, debris, and/or loose terminations. Clean and tighten as needed.
  • Check motor contactor for pitting or other signs of damage. Repair or replace as needed.
  • Check fan blades and fan housing. Clean, repair, or replace as needed to ensure proper operation.
  • Check refrigerant system pressures and/or temperatures. If outside of recommended levels, find cause, repair, and adjust refrigerant charge to achieve optimal operating levels.
  • Check open drive alignment, wear, seating, and operation. Repair or replace as needed.
  • Assess field-serviceable bearings. Lubricate if necessary.
  • Check for evidence of buildup or fouling on heat exchange surfaces. Restore as needed to ensure proper operation.
  • Check for proper fluid flow and for fluid leaks. Clean, adjust, and repair as needed to restore proper flow.
  • Inspect air-cooled condenser surfaces for damage or evidence of leaks. Repair or clean as needed.
  • Check low ambient head pressure control sequence for evidence of improper operation.
  • Check compressor oil level and/or pressure on refrigerant systems having oil level and/or pressure measurement means. Repair, Replace, or adjust as needed to ensure proper control.

Fan – Coils:

  • Check for particulate accumulation on filters. Clean or replace as necessary to ensure proper operation.
  • Check system traps, pumps, and controls. Clean or replace as needed to ensure proper operation.
  • Check control system and devices for evidence of improper operation. Clean, lubricate, repair, adjust, or replace components as needed to ensure proper operation.
  • Check P-trap. Prime as needed to ensure proper operation.
  • Check fan belt tension. Check for belt wear and replace if necessary to ensure proper operations. Check sheaves for evidence of improper alignment or evidence of wear and correct as needed.
  • Check for proper cooling operation and for damage or evidence of leaks. Clean, restore, or replace as required.
  • Check air filter fit and housing seal integrity. Correct as needed.
  • Check control box for dirt, debris, and/or loose terminations. Clean and tighten as needed.
  • Check fan blades and fan housing. Clean, repair, or replace as needed to ensure proper operation.
  • Check integrity of all panels on equipment. Replace as needed to ensure proper integrity fit/finish of equipment.
  • Assess field-serviceable bearings. Lubricate as necessary.
  • Check for proper fluid flow. Clean, adjust, and repair as needed to restore proper flow.
  • Check drain pan, drain line, and coil for biological growth. Clean as needed.
  • Check coil fins. Restore if possible. Replace coil if necessary to return to proper functioning.
  • Inspect for evidence of moisture carryover beyond the drain pan from cooling coils. Make corrections or repairs as necessary.
  • Check for proper damper operation. Clean, lubricate, repair, replace, or adjust.
  • Visually inspect areas of moisture accumulation for biological growth. If present, clean or disinfect as needed.
  • Check condensate pump. Clean or replace.

HVAC – Water Distribution System:

  • Perform chemical testing of system water. Treat as needed to ensure proper water chemistry.
  • Check chemical injector device. Clean as needed.
  • Check makeup water system for pressure and operation. Adjust as necessary
  • Vent air from system high points. Check for proper fluid flow and check piping for leaks. Repair as needed.
  • Visually inspect pumps and associated electrical components. Repair as needed to ensure proper operation.
  • Check for evidence of buildup or fouling on heat exchange surfaces. Restore as needed to ensure proper operation.
  • Check for proper fluid flow. Clean, adjust, and repair as needed to restore proper flow.
  • Check Strainers. Clean as needed.
  • Visually inspect external piping insulation and vapor barrier for integrity. Correct as needed.
  • Check freeze states, relief valves, flow and float switches, low-water cutoffs, and other safety devices for proper operation and repair as required.

Pumps:

  • Visually inspect pumps and associated electrical components. Repair or replace as needed to ensure proper operation.
  • Check control system devices for evidence of improper operation. Clean, lubricate, repair, or replace components as needed to ensure proper operation.
  • Check motor contactor for pitting or other signs of damage. Repair or replace as needed.
  • Check pumps drive for wear or problems due to poor alignment or poor bearing seating. Repair or replace as needed.
  • Check for proper fluid flow. Clean, adjust, and repair as needed to restore proper flow. Check pump, piping, and seals for fluid leaks, Repair as needed.
  • Assess field-serviceable bearings. Lubricate if necessary.
  • Check insulation, vibration isolators, and flexible connectors for integrity. Repair as needed.

General

  • Provide all specialty tools and test equipment necessary to support all maintenance functions associated with the Cooling Tower.
  • Install all new parts and/or equipment per manufacturer’s specifications.
  • Provide all warranty information on installed equipment in writing and include what is covered, start/end coverage date. Warranty information must be provided before any project is closed and before final payment is made.
  • We are responsible for all pre-engineering work for maintenance projects, and for the accuracy of all measurements.
  • We provide all chemicals necessary for the work required, and associated Material Safety Data Sheets (MSDS).
  • We provide all equipment manuals for newly installed equipment.
  • Time lines must be submitted for all maintenance project work, to include start date, milestones, progress dates against completion, and completion date.
  • Submit a weekly activity report on the progress of maintenance activities and/or maintenance project work.
  • Maintain accurate log to include, but not limited to, date/time and results of: visual and preventative maintenance inspections to pool and equipment; water testing and treatments; equipment failures and/or decreased operational status; suggested/required repairs; and maintenance actions/repairs on equipment.
  1. Operation & Maintenance of Cooling Tower (Open Loop) System

We provide qualified personnel, familiar with all the required services and tasks associated with operations and routine preventative maintenance of the Cooling Tower and Systems. Personnel will maintain the systems in a manner to ensure system operations. We will support emergency on-call services.

  • Perform daily operational tasks and routine preventative maintenance on the area Cooling Tower support equipment.
  • Provide a representative to attend daily maintenance meetings with management to coordinate all work, (to include but not limited to PM, PMI, repairs, and upgrades,).
  • Provide all chemicals and associated Material Safety Data Sheets (MSDS).
  • Test for bacterial presence using test kits. Presence of bacteria will be used as a guide for required chlorine levels, or shock treatments to control excessive bacterial presence.
  • Shock treatment applied as needed per daily visual inspection, with chlorine Super/Hyper chlorination), or chlorine free (Oxidizer and Sanitizer) shock treatments to kill active algae growth. Shock treatment is recommended when any of the following conditions apply:
  1. The free or total halogen lower limit has not been met for 48 hours or more;
  2. There are two total MB count test results greater than104 CFU/ml in a row;
  3. The anaerobic test result comes back “positive”.
  • Test, adjust, and maintain safe chemical levels in the water.
  • The cooling water can be tested for total microbiological (MB) counts (aerobic planktonic bacteria, 48 hour incubation) once per preventative maintenance schedule.
  • Clean tower basin (sludge removed) whenever the whole cooling tower is down.
  • Inspect water inlets for plugging during shutdowns and clean as necessary.
  • Establish and perform startup procedures, to include, but not limited to: Disinfect the tower, first with shock treatment with hypochlorite, followed by a non-oxidizing biocide when halogen residuals return to normal.
  • Control input water temperature to avoid temperature ranges where Legionella grow. Keep cold water below 25° C (77° F) and hot water above 55° C (131° F).
  • Apply biocides in accordance with label dosages to control growth of other bacteria, algae, and protozoa that may contribute to nutritional needs of Legionella. Rotating biocides and using different control methods is recommended. These include thermal shock, oxidizing biocides, chlorine-based oxidants and ozone treatment.
  • Conduct routine periodic “back-flushes” to remove bio-film buildup on the inside walls of the pipes per the preventative maintenance schedule.

 General

  • We provide all specialty tools and test equipment necessary to support all maintenance functions associated with the Cooling Tower.
  • Install all new parts and/or equipment per manufacturer’s specifications.
  • We provide all warranty information on installed equipment in writing and include what is covered, start/end coverage date. Warranty information must be provided before any project is closed and before final payment is made.
  • We are responsible for all pre-engineering work for maintenance projects, and for the accuracy of all measurements.
  • We provide all chemicals necessary for the work required, and associated Material Safety Data Sheets (MSDS),
  • We provide all equipment manuals for newly installed equipment.
  • Time lines must be submitted for all maintenance project work, to include start date, milestones, progress dates against completion, and completion date.
  • Submit a weekly activity report on the progress of maintenance activities and/or maintenance project work.
  • Spot inspections can take place at any time for any reason.
  • Work can be stopped and reviewed and ended due to work quality, safety, performance against schedule and any deviation against planned work.
  • Maintain accurate log to include, but not limited to, date/time and results of: visual and preventative maintenance inspections to pool and equipment; water testing and treatments; equipment failures and/or decreased operational status; notifications to management of sub-standard equipment operation and/or equipment failures; suggested/required repairs; and maintenance actions/repairs on equipment.
  • Maintain a neat and orderly work area. Vendor personnel are responsible to clean up after every maintenance shift, and after completion of project work.
  1. Fabrication & Pipe Fitter Services
  • We will provide an experienced Fabricator/Pipe Fitter to perform metal fabrication and pipe fitting services to include, but not limited to design, cutting, and welding in support maintenance activities and projects approved by management.
  • We will submit quotes to management for support materials prior to starting work on maintenance activities and projects.
  • We are responsible for Fabricator/Pipe Fitter labor costs and will submit invoices for all materials purchased.
  1. Electrical Supplies & Generator Oil
  • We will provide the electrical supplies needed in the area and make the invoices for all materials purchased.
  • We will provide the generator supplies needed in the area and make the invoices for all materials purchased.