Carbon Steel Flanges to Oman

Oil & Gas Industry

Upstream Production Facilities :

PDO operates over 200 producing oil fields across central and southern Oman, including the giant Fahud, Yibal, Lekhwair, Nimr, Mukhaizna, and Harweel fields. These facilities require thousands of carbon steel flanges for:

• Production Manifolds: Wellhead connections, gathering manifolds, and production separators use Class 600# to 1500# ASTM A105 weld neck flanges in sizes from 2″ to 24″ to handle crude oil, associated gas, and produced water at pressures up to 3,000 psi.
• Crude Oil Gathering Systems: Pipeline networks collecting crude from wellheads to central processing facilities employ Class 300# and 600# slip-on and weld neck flanges in 6″ to 16″ sizes for ambient to moderate temperature (up to 150°C) service.
• Gas Processing Plants: Oman’s gas processing facilities (Fahud Gas Plant, Saih Rawl Gas Plant, Saih Nihayda Gas Plant) separate natural gas liquids (NGLs), remove H₂S and CO₂, and compress gas for sales or re-injection. Class 600# to 1500# flanges in carbon and low-alloy steels handle pressures exceeding 1,000 psi and temperatures to 200°C in amine treating units, molecular sieve dehydration, and compression stages.
• Water Injection Systems: Enhanced oil recovery through water flooding requires high-pressure injection networks using Class 900# to 1500# carbon steel flanges to withstand injection pressures of 2,000-3,500 psi. Flanges receive special coatings or are upgraded to stainless steel in brackish water systems to prevent corrosion.
• Tank Farm Connections: Crude storage tanks, produced water tanks, and chemical injection tank manifolds use Class 150# to 300# blind and slip-on flanges for low-pressure service, often hot-dip galvanized for outdoor atmospheric exposure.

Midstream Infrastructure:

• Export Pipelines: The main export pipeline from PDO’s interior fields to Mina Al Fahal terminal near Muscat (approximately 280 km) uses large-diameter (24″ to 36″) Class 300# to 600# weld neck flanges at pump stations, block valves, and meter stations.
• Gas Transmission: The national gas transmission network operated by OGT (Oman Gas Company) transports gas from production fields to power plants, desalination facilities, and industrial consumers. Class 600# and 900# carbon steel flanges in 12″ to 36″ sizes handle transmission pressures of 900-1,100 psi.

Downstream – Refining:

Oman Oil Refineries and Petroleum Industries Company (ORPIC) operates two major refineries:

• Sohar Refinery (116,000 bpd capacity): Processes crude oil into gasoline, diesel, jet fuel, and petrochemical feedstocks. Carbon steel flanges are used throughout:
  • Atmospheric distillation columns: Class 150# to 300# flanges in 12″ to 48″ sizes
  • Vacuum distillation units: Class 150# to 300# for moderate-pressure service
  • Fluid catalytic cracking (FCC) units: Class 600# flanges for reactor and regenerator connections operating at 300°C+
  • Hydroprocessing units: Class 600# to 900# for high-pressure hydrogen service (up to 1,500 psi)
  • Product pipelines: Class 150# to 300# for finished product transfer to storage

Power Generation

• • Oman’s electricity demand drives continuous expansion of gas-fired power generation capacity. Major power plants using carbon steel flanges include:Sohar Independent Power Project (745 MW):
    • Gas turbine fuel gas skids: Class 300# to 600# flanges for natural gas supply at 500-650 psi
    • Combined cycle steam system: Class 600# and 900# flanges in high-pressure steam piping (1,500 psig, 540°C) – alloy steel grades preferred, but carbon steel for auxiliary steam
    • Heat recovery steam generators (HRSG): Class 150# to 900# flanges across economizer, evaporator, and superheater sections
    • Cooling water systems: Class 150# slip-on and blind flanges in seawater cooling circuits

    Barka Independent Power & Water Project (427 MW + 80 MIGD desalination):

    • Similar gas turbine and HRSG flange requirements
    • Desalination integration requiring Class 150# carbon steel flanges with fusion-bonded epoxy coating in brine handling

    Sur Independent Power Project (2,000 MW under development):

    • One of the largest power plants in Oman will require thousands of carbon steel flanges across gas turbine packages, combined cycle systems, and auxiliary equipment

    Renewable Energy Integration: As Oman develops solar and wind capacity under the 2040 Vision, balance-of-plant piping for concentrated solar power (CSP) facilities will use carbon steel flanges in heat transfer fluid circuits, steam generation systems, and cooling water networks.

Petrochemical & Chemical Processing

• • Oman Polypropylene LLC (OPP): Located in Sohar, this world-scale polypropylene plant produces 340,000 tons/year of polymer resins. Carbon steel flanges serve:
    • Propylene feed systems: Class 300# to 600# flanges handling liquefied propylene at 150-200 psi
    • Polymerization reactors: Class 600# flanges for moderate-pressure catalyst injection and polymer discharge
    • Utilities: Steam, cooling water, compressed air, nitrogen systems using Class 150# to 300# flanges

    Oman Methanol Company (OMC): Produces 1.06 million tons/year of methanol from natural gas. Applications include:

    • Synthesis gas compressors: Class 600# to 900# flanges handling 750-900 psi pressure
    • Methanol synthesis reactors: Class 900# flanges for 900 psi, 250°C service
    • Distillation columns: Class 150# to 300# flanges for pressure-swing distillation
    • Product storage and loading: Class 150# flanges with chemical-resistant coatings

    Sohar Aromatics Company: BTX (benzene, toluene, xylene) production from naphtha feedstock:

    • Reforming units: Class 300# to 600# carbon steel flanges for high-temperature hydrogen circulation
    • Extraction towers: Class 150# to 300# flanges for solvent extraction systems
    • Product fractionation: Class 150# flanges in distillation towers separating benzene, toluene, and xylenes

    Oman India Fertiliser Company (OMIFCO): Ammonia and urea production in Sur:

    • Ammonia synthesis: High-pressure Class 1500# and 2500# flanges for 3,000+ psi hydrogen and nitrogen compression
    • Urea synthesis: Class 900# flanges for 150-bar CO₂ compression and reaction systems
    • Utilities: Standard Class 150# to 300# flanges throughout cooling water, steam, and condensate systems

     

Water & Wastewater Treatment

• • Desalination Plants:Oman relies heavily on desalination for drinking water, with major plants including:
    • Barka Desalination Plant (281,000 m³/day): SWRO and MSF technologies use carbon steel flanges with heavy protective coatings:
      • Seawater intake: 24″ to 48″ Class 150# flanges, hot-dip galvanized or FBE-coated
      • High-pressure RO feed pumps: Class 600# flanges handling 900-1,000 psi
      • Brine discharge: Large-diameter Class 150# coated flanges
      • Product water distribution: Class 150# flanges, epoxy-lined
    • Qurayyat Desalination Plant (190,000 m³/day): Similar flange requirements with emphasis on corrosion-resistant coatings and alloys for seawater contact
    • Sohar, Sur, Salalah Desalination Plants: Collective capacity exceeding 500,000 m³/day

    Municipal Water Treatment:

    • Haya Water (Oman’s water and wastewater services provider) operates treatment plants across major cities using Class 150# carbon steel flanges in:
      • Raw water intake and pumping: Large-diameter (16″ to 48″) flanges
      • Treatment process piping: Chemical dosing, filtration, disinfection systems
      • Treated water distribution: High-pressure pumping stations using Class 300# flanges

    Wastewater Treatment:

    • Sewage treatment plants (STPs) in Muscat (Al Ansab, Al Khoud), Sohar, Salalah, and other cities
    • Class 150# carbon steel flanges with corrosion-resistant coatings in aeration systems, sludge handling, and effluent pumping
    • Reclaimed water distribution for irrigation and industrial use

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