What makes Doowon piping suitable for LNG vessel and plant applications?

Doowon Highsteel specialises in welded austenitic stainless steel and low-temperature carbon steel engineered for cryogenic service down to minus 162 degrees Celsius, including grades ASTM A312 TP304/L, TP316/L, TP310, TP321, TP347, and TP904L, class certified and supplied to Samsung Heavy Industries and Hanwha Ocean.

What are Doowon's maximum production dimensions?

Doowon produces welded pipe up to 120 inches OD in stainless steel, up to 140 inches OD in carbon steel, and up to 40 inches OD in copper nickel, enabling supply of headers, manifolds, and major process lines for LNG plants and offshore EPCI contracts.

Which classification societies certify Doowon products?

Doowon Highsteel holds class certification from ABS, Bureau Veritas, DNV, Lloyd's Register, Korean Register, and RMRS, with JIS compliance, covering marine, offshore, and industrial applications.

How is Doowon distributed in Qatar and the GCC?

The Concept Global is the authorised partner for Doowon Highsteel in Qatar, Iraq, and Algeria, managing technical consultation, project-specific material selection, procurement logistics, documentation packages, and supply chain support.

Doowon Highsteel: Large-Diameter Welded Pipe for LNG, Offshore, and Petrochemical Projects

Doowon Highsteel Co., Ltd., founded in 2009 in South Korea, manufactures large-diameter welded steel pipe for LNG vessels and plants, warships, offshore platforms, and gas line infrastructure, to ASTM and JIS standards with full mill certification and traceability. Doowon is a direct supplier to Samsung Heavy Industries, Hanwha Ocean, and Samsung ENG, and complies with ASME and API codes applicable to QatarEnergy and regional EPCI procurement. The Concept Global is the authorised partner for Doowon in Qatar, Iraq, and Algeria, managing technical specification, procurement logistics, and supply chain support.

Material families

Stainless steel to 120 inch OD: ASTM A312 TP304/L, TP316/L, TP310, TP321, TP347, TP904L; JIS G 3459. Cryogenic service to minus 162 degrees Celsius for LNG.
Carbon steel to 140 inch OD: ASTM A333 low-temperature and A671 electric-fusion welded. Gas lines, steam, oil and water transmission, high-temperature service.
Copper nickel to 40 inch OD: CuNi 90/10 and 70/30 for seawater cooling, offshore platforms, and marine heat exchangers, resistant to biofouling and chloride corrosion in Gulf waters.
Duplex and Super Duplex for corrosion-critical offshore and subsea environments.

Certification

Class certified by ABS, Bureau Veritas, DNV-GL, Lloyd's Register, Korean Register, and RMRS, with JIS compliance. ISO 9001:2015, ISO 14001:2015, ISO 45001:2015. Project track record includes Petronas-ZLNG and ENI Coral North FLNG. Complete supply including fabricated fittings, flanges, and plate.

Contact: accelerate@theconcept.global | +974 4433 5932 | Jazeera Tower, Building 186, Street 836, West Bay, Doha, Qatar | Sunday to Thursday 08:00 to 17:00 AST.

Doowon Highsteel: الأنابيب الملحومة كبيرة القطر لمشاريع الغاز والبحرية

مصنّع كوري جنوبي تأسس عام 2009 للأنابيب الفولاذية الملحومة كبيرة القطر لسفن الغاز الطبيعي المسال والمنصات البحرية والبنية التحتية للطاقة. فولاذ مقاوم للصدأ حتى 120 بوصة، وكربوني حتى 140 بوصة، ونحاس نيكل حتى 40 بوصة. معتمد من ABS وBV وDNV وLR وKR وRMRS، ومورد مباشر لشركات بناء السفن الكورية الكبرى. ذا كونسبت جلوبال هي الشريك المعتمد في قطر والعراق والجزائر.