Carbon Steel Flanges Supplier to Vietnam

Oil & Gas Industry

Upstream – Offshore Production:

PetroVietnam (PVEP) operates multiple offshore oil and gas fields in the South China Sea, including the historic Bach Ho (White Tiger) field and newer blocks in the Cuu Long Basin, Nam Con Son Basin, and Song Hong Basin. These offshore platforms require thousands of carbon steel flanges for:

• Wellhead connections: ASTM A105 Class 900# to 2500# weld neck flanges connecting Christmas trees to flowlines
• Production manifolds: Class 600# flanges in 4″ to 16″ sizes handling crude oil and associated gas at 50-150 bar pressure
• Gas-oil separation equipment: Class 300# and 600# flanges on separator vessels, scrubbers, and knock-out drums
• Export pipelines: ASTM A694 F52/F60 high-strength flanges for subsea pipelines to shore facilities at Vung Tau
• Riser connections: Large-diameter (16″-24″) Class 300# flanges at platform deck penetrations
• Produced water systems: ASTM A105 Class 150# flanges for water injection and disposal systems

Midstream – Pipeline Transmission:

Vietnam’s expanding gas pipeline network connecting offshore fields to onshore power plants and industrial consumers:

• Gas transmission pipelines: Nam Con Son to Ca Mau pipeline (400km, 24″-36″ diameter) uses ASTM A694 high-strength flanges
• Pipeline stations: Compressor stations, metering stations, and pig launching/receiving facilities require Class 300# to 600# flanges
• Pressure reduction stations: Class 600# flanges with Class 150# downstream for pressure letdown systems supplying industrial customers

Downstream – Refining:

Vietnam’s major refineries at Dung Quat (Quang Ngai Province, 200,000 bpd capacity) and Nghi Son (Thanh Hoa Province, 200,000 bpd capacity) utilize carbon steel flanges throughout processing units:

• Crude distillation units: High-temperature ASTM A105 flanges in furnace piping and overhead systems
• Fluid catalytic cracking (FCC): Class 150# to 300# flanges handling hydrocarbon vapors at 350-450°C
• Hydroprocessing units: Class 600# flanges in hydrogen service (ASTM A105 suitable per NACE MR0175)
• Storage tank connections: Large-diameter (24″-48″) Class 150# flanges on crude and product storage tanks

Marine loading terminals: Class 150# flanges on loading arms at Dung Quat and Nghi Son export terminals

Power Generation

• Vietnam’s electricity demand grows 10% annually, driving massive investment in thermal power generation requiring extensive carbon steel flanges.Coal-Fired Power Plants:Vietnam operates over 20 coal-fired power stations with combined capacity exceeding 20 GW, each requiring thousands of flanges:
  • Mong Duong Power Plant (Quang Ninh Province): 2,400 MW facility uses ASTM A105 flanges in:
    • High-pressure steam systems (100-165 bar, 540-565°C): Class 900# to 1500# weld neck flanges in 6″-24″ sizes
    • Boiler feedwater piping: Class 600# flanges handling 180°C water at 175 bar
    • Turbine connections: Large-diameter (20″-36″) Class 300# flanges at turbine inlet/outlet
    • Condenser water boxes: Class 150# flanges on cooling water inlet/outlet
    • Ash handling systems: Class 150# carbon steel flanges in pneumatic ash transport piping
  • Vinh Tan Power Plant (Binh Thuan Province): 4,400 MW complex with similar flange requirements
  • Vung Ang Power Plant (Ha Tinh Province): 1,200 MW facility imported from Japan, using ASTM A105 flanges to DIN/JIS standards

  Gas-Fired Power Plants:

  • Phu My Power Complex (Ba Ria-Vung Tau): Combined-cycle gas turbines require Class 150# to 300# flanges in natural gas supply systems
  • Ca Mau Gas Power Plant: Uses gas from Nam Con Son offshore fields, Class 300# flanges in gas metering and pressure reduction

  Biomass and Renewable Energy:

  • Sugar mill cogeneration plants throughout Mekong Delta use carbon steel flanges in bagasse-fired boilers

Petrochemical Processing 

• Vietnam’s growing petrochemical industry, anchored by the Long Son Petrochemical Complex (Ba Ria-Vung Tau Province), represents significant carbon steel flange demand.Long Son Petrochemical Complex Applications:
  • Ethylene cracker: High-temperature ASTM A105 flanges in furnace outlet piping (600-850°C service)
  • Polyethylene/Polypropylene units: Class 300# to 600# flanges in reactor and polymer processing systems
  • Aromatics complex: Flanges handling benzene, toluene, and xylene in separation and purification units
  • Utilities and offsites: Carbon steel flanges in cooling water, steam, compressed air, and nitrogen distribution

  Other Chemical Plants:

  • Fertilizer production: Phu My Fertilizer Plant (Ba Ria-Vung Tau) uses carbon steel flanges in ammonia and urea synthesis
  • PVC manufacturing: Petrochemical complexes in southern Vietnam producing vinyl chloride monomer and PVC resins

  Chemical storage terminals: Tank farms at Hai Phong and Ho Chi Minh City ports handling acids, caustics, and solvents.

Water & Wastewater Treatment

• Vietnam’s rapid urbanization drives massive water infrastructure investment requiring ASTM A105 flanges.Municipal Water Treatment:
  • Hanoi Water Supply: Treatment plants serving 8+ million residents use Class 150# carbon steel flanges in:
    • Raw water intake pumping (Red River and Da River sources)
    • Chemical dosing systems (coagulation, chlorination)
    • High-pressure pumping for distribution (6-10 bar)
    • Transmission mains (500mm to 1,200mm diameter)
  • Ho Chi Minh City Water Supply: Expanding treatment capacity to 3 million m³/day requires thousands of Class 150# flanges

  Wastewater Treatment:

  • Binh Hung Hoa WWTP (Ho Chi Minh City, 480,000 m³/day capacity) uses carbon steel flanges in sludge handling and biogas systems
  • Da Nang wastewater infrastructure serves coastal tourism and industrial zones

  Desalination Projects (Planned): Vietnam is developing desalination capacity for islands and coastal areas, requiring corrosion-resistant flange materials.