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GCTC has signed a project with Saudi Aramco. This important project consists of Civil, Electrical, Mechanical & other miscellaneous works on Shaybah NGL pipeline. Company has to work on pipeline form Kilometer Zero to Kilometer 633. Description of work is given below.


The scope of work includes completing remaining works of the Shaybah NGL pipeline project.

GCTC will be responsible to complete these items for closing in the MPCS, In addition, the Company shall also be responsible to carry out any additional activities necessary to complete the work mentioned under this scope,

GCTC is responsible to provide all tools, materials, equipment, , man­power, certification, permits, and any other resources required to complete the work in the scope of this revision within the work completion date,


Pipeline Name: Shaybah NGL Pipeline (SHBABNGL-1); MAOP: 1200 psig

Pipeline Length: 633 Kilometer; Pipeline O.D: 36″; Service commodity: C2+NGL

Location: From Shaybah NGL plant KM zero until KM633 near Abqaiq

The pipeline contains 19 isolation valves, which is divided in 3 segments separated by scrapper launchers and receivers (a receiver and a launcher for each segment):

  • Segment-1 KM431 to KM633 (7 valves between Scrapper Launcher and Receiver)
  • Segment 2- KM211 to KM431 (7 valves between Scrapper Launcher and Receiver)
  • Segment 3- KM0 to KM211 (5 valves between Scrapper Launcher and Receiver)

Civil works in Valve stations and Scrapper Trap areas:

CONTRACTOR shall perform the following civil works activity at below mentioned 19 valve stations and scraper stations along the Shaybah NGL Pipeline from KM 0 to KM 633. The work shall be carried out in strict accordance with project drawings,

  • Contractor to demolish and remove existing type-1 fence inside the valve station (located between Shbab-1 and NGL Pipeline within the valve station). The activity has to be carried out for all 19 valve station locations.
  • Install concrete channel (grade beam) with embedded reinforcing bar hook around the perimeters of the newly constructed type-l fence for all 19 Valve station in accordance with design drawing no, AC-036680-001, Once casted the fence line to be anchored to the grade beam,
  • Contractor to procure and Install remaining gate accessories (i.e. plunger catcher, plunger & gate locks etc.). Incomplete and damaged fence works for type I and IV at to be completed and rectified, respectively, Contractor to carry out a full site survey to estimate the quantities for this particular activity,
  • Contractor to procure and install 80m length of type IV fence to fully secure burnpit fence perimeter at Km 614.
  • Fabricate, coat black-yellow strips and install crash barriers and guard rails around the valve station perimeter fence, bypass spool and solar panels at the following locations: KM 508, 489, 447, 340, 301, 267, 236, 157, 71,42 and 9,
  • Contractor to complete the berm construction for exposed flare-tip flange connection and reinforce it with marl at burn-pit locations. The activity to be carried out at 12 locations, The locations include Km 431, 399, 379, 357, 340, 301, 267, 236, 211, 157, 117, & 71,
  • Contractor to cast, cure and coat the concrete foundation slab for scarper trap receiver and launcher at Km 211 as per relevant drawings
  • Complete the excavation and construction of swale for all 19-valve station as per IFC drawings.

Mechanical and Electrical works at Valve stations and Scrapper Trap areas:

CONTRACTOR shall perform the following mechanical and electrical works at each valve and scraper station locations (or stated otherwise) in Shaybah NGL from KM 0 to KM 633 in accordance with IFC drawings:

  • Contractor to carryout hydro-testing for all 16″ and 4″ blowdown lines In 19 valve stations and 3 scraper trap areas. This will essentially include the following-
  • The preparation of the method statement in accordance with the site conditions and have it approved by SAPMT
  • Contractor will be responsible for any modification or temporary isolation of the blowdown lines (if required)
  • Contractor will be responsible for any repair that may be required to complete the test and handover the facility ready for operation.
    • Complete the full installation of existing ring girders along with insulation sheeting at all valve stations in Segment 2 & 3.
    • Complete the installation of cable markers at the following locations:
  • Segment 2 – 15 KM ( From KM 226 to KM 211)
  • Segment 3 – 141 KM (From KM 157 to KM 16)

The estimated number of markers required are approximately 570. Any additional material to be procured and delivered to site by the contractor. Contractor is responsible to make sure that the markers meet the requirements of Saudi Aramco specification,

  • Fabricate and install steel covers for IDS and SRI encasement as per site condition at Km 431 and 211,
  • Complete grounding for all scraper trap trolleys at Km 633, 431 and 211,

Other Miscellaneous works:

  • Cleaning of Right of Way (ROW) to access valve stations, the quantity for this specific item to be verified and agreed upon before work commences.
  • Removal of accumulated sand at Km 614 burnpit location to complete the fence work. The quantity to be verified by PMT before commencing work.

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The Royal Commission for Jubail and Yanbu (RCJY) established in 1975 is the Saudi Government Agency, reports to the Prime Minister, entrusted with the task of planning, developing, operating and managing the three world-class industrial cities, Madinat Al-Jubail, Madinat Yanbu Al-Sinaiyah and Ras Al-Khair Industrial Cities. The Royal Commission aims to promote, develop and enable petrochemical, chemical, minerals and their downstream industries through successful customer focus and partnerships with investors, employee communities and stakeholders.
WORK SHOP FOR GCTC (Gulf Corners for Trading & General Contracting Company):
GCTC has achieved another miles stone in order to successful meeting with Royal Commission officials. Meeting was held on 07-Feb-2017. GCTC presented its new technologies for surface treatment & long life of all kind of metals i.e Oil & Gas pipelines, Valves, pumps, plants & rehabilitation of tanks etc.


Company is going to introduce two revolutionary technologies. These technologies are KCC (K-Chromium Carbide) and KNN (Plasma Nano ion nitrification). GCTC will provide repair & maintenance services by using these two revolutionary technologies. In particular, the valve body inner surface treatment by the KCC on maximizing the service life by having a corrosion / abrasion resistance, such as seat & ball. KCC surface treatment developed by GCTC shows surface hardness HV1300 and friction coefficient 0.4. It prevents abrasion caused by composites and reduces corrosion owing to high acid resistance.

1.   KCC:

A process that Chromium Carbide (C-Cr) is chemically formed in the high temperature vacuum device and then in infiltrated into the matrix. Excellence in abrasion resistance with high hardness (> HV 1700), chemical resistance and lubrication with friction coefficient less than 0.5

  • PrincipleDiffusion of metal onto the surface
  • Features-Excellent abrasion and chemical resistance
  • Main products-Slurry pump impellers, chute liners, pipes, and metal seat ball valves

2.   KNN:

Using the hollow cathode effect, active nitrogen atoms with high density and low energy are nano-sized, and then deposited, diffused on the surface of treated material.

  • PrincipleFormation of nano nitriding and carburized layers with atomic nitrogen and carbon through low voltage high density plasma generation process.
  • Features-Low temperature treatment, formation of stainless nitriding layers and mirror surfaces without chemical layers
  • Main products-Steam drain control valves, valve steam discs, temp, control valve internals, etc.


No pre/post treatment required

No change in dimensions and shape

High hardness and superior abrasion resistance

No arcing/edge effect, smooth surfaces

Controllable hardening depth

Excellent surface hardening of SUS316

GCTC has the whole region of Saudi Arabia to market its advanced technology based services. GCTC is going to start its operation from Dammam city, eastern province of Saudi Arabia and with the passage of time it will expand its operations up to the whole region of Saudi Arabia.

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Gctc 1GCTC (Gulf Corners for Trading & General Contacting Company) has got the project for working on Gas Well.  Following is given scope of work.


CONTRACTOR shall perform the construction in accordance with SAUDI ARAMCO standards and procedures and Model Construction Scope of Work for Gas Wells as per company design includes, but not limited to, the following:


  1. Clean and prepare well site for construction.
  2. Survey well site pad and identify the fence line(s) and corners. Supply, compact and grade select marl fill if required, to ensure the pad dimensions are correct with adequate space for the patrol road outside the fence.
  3. Grade and compact the entire well site pad.
  4. Excavate around and remove the existing steel cellar. (This shall be done by gas cutting into pieces that can be easily transported, and CONTRACTOR shall haul steel cellar sections to SAUDI ARAMCO Reclamation Yard). Construct the concrete cellar for the wellhead, including form work, steel bending, installation, pouring and finishing concrete, coating of concrete, grouting, and installation of anchor bolts.
  5. Excavate, construct and install concrete structures for all foundations, concrete bases and miscellaneous supports within and including the Well site fenced areas. This rate shall include form work, anchor bolts, steel bending, concrete supply and installation, coating, backfill and compaction.
  6. Excavate and construct windsock pole, including form work, anchor bolts, steel bending, concrete supply and installation, coating, backfill and compaction.
  7. Excavate and construct the burn pit. The sides and base shall be finished with watered and compacted marl. This shall include the excavation or installation of sand or marl.
  8. Where specified on the construction drawings excavate and compact drainage channels outside the fence, to ensure drainage water from the well site will escape to natural drainage.


  1. Fabricate, install and paint seating angles for cellar grating, sleeves for air blower pipe and electrical conduits prior to casting well site cellar concrete.
  2. Fabricate, erect and paint, chemical injection, methanol and equipment shelters.
  3. Fabricate, paint, and erect guardrail, guard posts and sand barriers.
  4. Fabricate, paint and erect fixed and detachable pipe supports, pipe guides, spring hanger supports, pipe anchors, valve supports and miscellaneous supports.
  5. Supply and install SAUDI ARAMCO “Type-IN” Security fencing, posts with single walkway gates, double drive gates, rig access gates, man gates and emergency gate with modified emergency lock mechanism.
  6. Fabricate and erect warning signs and supports specified in Scope of WORK, including engrave and install safety signs as specified in Scope of WORK.
  7. Fabricate, install, paint and erect wellhead access platforms complete with stairs, ladders, hoop and safety guards, platform grating, securing clips, associated ladders, steps and guard rails.
  8. Fabricate, paint and erect instrument stands, and miscellaneous platforms.
  9. All structures, pipe supports, hand rails, guard rails, stairways, ladders and miscellaneous steel work shall be sand blasted and painted.


  1. Install corrosion inhibitor injection skid complete with storage tank. WORK shall include supply and fabrication of the shelter, assembly, alignment, coupling up all related equipment, installing tubing, gauges electrical & instrumentation wiring etc., in accordance with manufacturer’s instructions. CONTRACTOR shall fabricate and install plastic level gauge with white letters on black background for the sight level glass. Graduations shall be marked as directed by the Company Representative. CONTRACTOR shall test and pre-commission the system.
  2. Install the emergency eye wash unit.


  1. Fabricate, pre-heat as necessary, and weld the production header from the wing valve to the well site fence, install flanges, hubs, branches, injection points, drains, sleeves, scraper signals, flow meter, valves and personnel protection insulation.
  2. Fabricate, pre-heat as necessary and weld well casing kill line, 4” well tubing kill lines, 4” and 2” well blow down lines, and well casing vent blow down line, portable sampling manifolds (complete with expansion sleeves), valves, gauges, disconnect boxes, anchors, cathodic protection and external coating. For stainless steel pipe and fittings CONTRACTOR’s pricing to Schedule “C” shall include all costs associated with nitrogen purging and PMI testing.
  3. Fabricate and install all chemical injection tubing from the chemical injection skids to the production line injection points. All tubing shall be externally coated and hydrostatically tested by the CONTRACTOR.
  4. Fabricate, test and install the tie-in spools required between the wing valve and 6” production header.
  5. Fabricate and install the chemical storage tank stainless steel fill lines, complete with all connections, flanges, valves, couplings and supports. Note – buried portions of pipe shall be externally coated by CONTRACTOR with no additional cost to SAUDI ARAMCO.
  6. Fabricate and install the below grade air ducting, from the air blower motor to the wellhead cellar, complete with cellar pipe supports. Below ground field welds shall be externally coated by CONTRACTOR.
  7. Fabricate and install the corrosion inhibitor and methanol injection system drain’s line where shown on construction drawings.
  8. CONTRACTOR shall perform all NDE testing, including radiography and PMI as part of the applicable unit rates. Additional compensation will not be provided for any NDE testing.


  1. Install, terminate and test the complete power system from the transformer to the well site 480/120 volt distribution panels. WORK shall include the buried cable markers, warning signs, all excavation and back-fill.
  2. Assemble, install, wire, terminate and pre-commission the 480/120 volt distribution panels.
  3. Install and terminate the stranded bare copper wire which connects the well site ground grid to the cathodic protection transformer neutral, along with all ground rods, ground wire and all grounding connections around the well site.
  4. Install and terminate test, and pre-commission the air blower fan, cables, conduits, and switches.
  5. Install, wire, terminate, test and pre-commission all well site lighting and receptacles.
  6. Install, wire, terminate, test and pre-commission the LEL/H2S sensors, LEL/H2S beacon horn and all associated junction boxes.
  7. Install, wire, terminate, functionally test and pre-commission the methanol injection and corrosion inhibitor injection pumps, as per the manufacturer’s instructions.
  8. CONTRACTOR shall disconnect the existing cathodic protection from the wellhead for constructing the concrete cellar. Install the C.P. cable disconnect box conduits and re­ terminate the cathodic protection cable to the disconnect box and the wellhead.
  9. Wire, terminate and test all well site instrumentation.
  10. Install all conduits, cable glands and fittings associated with the WORK.
  11. CONTRACTOR shall install and test all heat tracing cables, elements and junction boxes. CONTRACTOR shall supply and install insulation on all heat tracing installations.
  12. CONTRACTOR shall test, pre-commission and commission all electrical installations and prepare and provide electrical test and pre-commissioning.
  13. CONTRACTOR shall notify SAUDI ARAMCO whenever the breaker does not meet required specification in scope of work.


  1. CONTRACTOR shall calibrate, install, connect, and test.
  2. Scraper passage indicators, electronic pressure transmitters, pressure control valve, pressure indicating controller, thermo-wells with indicators, flame detector, electrical fusible plugs, gas detector, sand probe, transducers, audible alarm, PLC/RTU installations, remote ESD hand Stations, LEL/H2S sensors, and flashing beacon. CONTRACTOR shall insulate all heat tracing cables.
  3. Chemical injection fittings in the drop out spools.
  4. Pressure indicators.
  5. CONTRACTOR shall test, drain, flush, strain, clean and commission all wellhead hydrostatic lines.
  6. WSD system.
  7. Hydraulic tubing or electrical cable from the WSD control panels to the surface and/or sub-surface safety valve actuators.
  8. Shrink sleeves on all below grade hydraulic tubing.
  9. Instrumentation wiring associated with field devices, pumps, skids, power distribution panel, WSD control panel, and the PLC/RTU.
  10. Supply, fabricate and install plastic tags to identify all instruments, junction boxes, splice boxes, ESD panels, PLC/RTU’s, chemical injection skids, H2S monitor and sensors. CONTRACTOR shall supply and install brass accounting tags with stainless steel self-tapping screws to selected equipment as directed by the Company Representative.
  11. CONTRACTOR shall install car seals on valves as directed by the Company Representative.
  12. CONTRACTOR shall install and functionally test the flow control system components.
  13. CONTRACTOR shall install, test, pre-commission and commission all instrumentation. SAUDI ARAMCO shall not provide any vendor support.
  14. CONTRACTOR shall prepare instrumentation test package and pre-commissioning documentation package for all instrumentation items.
  15. CONTRACTOR shall calibrate and install relief valves and process Relief Valve Authorization Form A-3099A

Hydro static Testing:

  1. Carryout hydrostatic testing in accordance with SAES-A-004, SAES-A-007 and all pressures and instructions indicated on the hydrostatic test diagrams.
  2. Provide all temporary hoses, piping, fittings, scrapers, test pumps, fill pumps, test manifolds of the correct strength required for filling and testing of all piping systems.
  3. Provide and calibrate all test equipment including but not limited to, recorders, dead weight testers, relief valves, pressure gauges, test manifolds.
  4. Isolate, or remove and replace any equipment or instruments not included during hydrostatic testing. CONTRACTOR shall ensure that such equipment or instruments are protected from damage during isolation, removal or replacement and shall replace any damaged instruments or equipment at no cost to Saudi Aramco.
  5. Ensure that a hydrostatic test procedure is submitted to the Company Representative for approval at least 6 weeks prior to any testing. This procedure shall also incorporate adequate safety precautions, pipe cleaning procedures, testing mediums, disposal methods, nitrogen purging.
  6. Provide manpower and equipment for the de-watering and drying of all systems. CONTRACTOR shall provide and pump nitrogen to dry all gas systems. Pipe shall be dried in accordance with SAES-A-004 after the de-watering of each piping system is complete. CONTRACTOR shall ensure all piping systems shall be free of leaks, soap and water tested and laid up with a positive pressure of nitrogen. (CONTRACTOR shall ensure that this positive pressure is maintained until the piping systems have been commissioned.
  7. CONTRACTOR shall perform hydrostatic testing in accordance with SAeS-A-004, SaES-A-007 and all pressures valves as required by Company Representative.
  1. Well Cathodic Protection

CONTRACTOR shall perform the work in accordance with SAUDI ARAMCO standards and procedures to install rectifier, remoter monitoring Unit (RMU) signals, anode bed, pyramid anodes, or vertical anodes, terminal pole, solar power module or transformer and fencing but not limited to the followings.

  1. Drilling, logging and testing of anode bore holes.
  2. Fabrication of CONTRACTOR’S designed gas diversion valves or devices and associated piping, and installation thereof on the drill rigs when drilling anode beds located within 1 km of gas and oil separating plants (GOSPs) and water injection plants (WIPs) or other facilities.
  3. Field assembly and installation of anodes down each bore hole or anode trench.
  4. Installation of coke breeze and cement plugs. (Cement plugs shall be installed at deep well anode beds only).
  5. Fabrication and installation of surface ancillaries and junction box assemblies at each anode bed site.
  6. Installation of direct burial cable between anode lead junction box and transformer /rectifier or solar installation and between well casing or pipeline and transformer/rectifier or solar installation.
  7. Installation of watering system on surface anode beds as required.
  8. Installation of Underground and Overhead AC power distribution system up to 33KV rating.
  9. Installation of pole mounted transformers, fuse cutouts, circuit, breakers, and lightening arresters.
  10. Installation of free standing AC power panels and transformer/rectifier disconnect switches.
  11. Installation of solar power supply system, Installation of solar power supply system, pad mounted transformers and PVC coated rigid conduits.
  12. Erection of type IV fencing and gates.
  13. Pre-commissioning of CP rectifier
  14. Commissioning of Switchgear.


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