Seoul Machinery

What Seoul Machinery does

Seoul Machinery Co., Ltd. (서울기계공업 주식회사) is a privately held South Korean heavy industrial manufacturer founded in 1983, specializing in process plant equipment for Oil & Gas, Chemical, Steel, Energy, and Environmental sector customers. The company operates from a 23,891m² state-of-the-art factory in the Seok Mun Industrial Complex in Dangjin-si, Chungcheongnam-do, South Korea — located 17.6km from Dangjin Port and 42.4km from Pyeongtaek Port — with a stated annual production capacity of 20,000 tons. Its core product lines are heat exchangers, pressure vessels, reactors, towers & columns, drums & tanks, and package units/skids, all designed and fabricated to international codes including ASME, ASTM, ANSI, API, TEMA, BS, PED, JIS, DIN, KS, DNV, and SEL. Seoul Machinery holds ASME U/U2/S stamps, National Board (R and U/U2/S) registrations, ISO 9001/14001/45001 certifications, and SEL certification, qualifying it to bid on international pressure-equipment and boiler scopes. The company carries 38 customer/end-user logos on its website, including confirmed enterprise wins such as Saudi ARAMCO (PDH/UTOS project, 2021) and Kumho Mitsui Chemical.

Technically, Seoul Machinery runs an advanced design and engineering stack built on CATIA, INVENTOR, CADIAN, and AUTO CAD for 3D modeling, with COMPRESS, PV ELITE, and FINGLOW used for pressure-vessel and heat-exchanger strength calculation. Manufacturing capability spans carbon steel (SA516-60/70, SA106-B/C), low-alloy steel, stainless steel (304L/316L, 321, 347, 904L, 310S, S32750), copper alloy, Hastelloy (B2, B3, C-276), aluminum, titanium, and nickel alloy, including alloy-clad fabrication (e.g., SA516-70 clad with 410, S31803, N10276, N10665, TP321). Quality assurance is supported by a full in-house Non-Destructive Examination lab covering RT, UT, MT, PT, TOFD, PAUT, PMI, ferrite count, vacuum testing, helium leak testing, and spectrometer analysis, reducing reliance on third-party inspection and shortening project critical-path.

The business model is direct B2B project sales: Seoul Machinery sells bespoke, code-stamped fabricated equipment and construction services to enterprise end users and EPC contractors via quote-based engagement (no published pricing, no channel partners). Distribution is direct, with shipment logistics anchored on Dangjin Port for both domestic Korean projects (e.g., Kumho Mitsui Chemical) and international project work (e.g., Saudi ARAMCO's PDH/UTOS project). Revenue is therefore inherently project-driven and lumpy, with no disclosed recurring-contract, subscription, or licensing component in the source material.

Name

Seoul Machinery

Legal name

Seoul Machinery Co., Ltd.

Website

https://seoulmachinery.com

Company type

Private

Founded year

1983

Operating status

Operating

Headcount range

1–10 employees

Short description

Seoul Machinery is a privately held South Korean heavy industrial manufacturer founded in 1983, producing ASME-stamped process plant equipment — heat exchangers, pressure vessels, reactors, towers, columns, drums, tanks, and skids — for Oil & Gas, Chemical, Steel, Energy, and Environmental sector end users and EPCs.

Ownership category

akta.pro rank

Product category

Industrial Process Plant Equipment Manufacturing

NAICS

Power Boiler and Heat Exchanger Manufacturing (332410), Industrial Machinery Manufacturing (33324)

SIC

Special Industry Machinery (No Metalworking Machinery) (3550), Fabricated Plate Work (Boiler Shops) (3443)

akta.pro primary industry

Pressure Vessels, Columns & Storage Tanks (ASME/Process Vessels) (IMAHAEAF)

akta.pro secondary industries

Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers) (IMAHAEAC), Chemical Processing Equipment (Reactors, Mixers, Agitators) (IMAHAEAA), Chemical & Petrochemical Plant Construction (IMAFADAA)

Keywords

• Process plant equipment
• Pressure vessel manufacturing
• Heat exchanger fabrication
• ASME certified fabrication
• Industrial reactor manufacturing

Headquarters

HQ city

Dangjin-si

HQ country

South Korea

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Infrastructure, Technology or R&D, Marketing or Sales

Distribution channels1 record

Marketing channels2 records

Core offering

Seoul Machinery designs and fabricates heavy industrial process plant equipment — including heat exchangers, pressure vessels, reactors, towers and columns, drums and tanks, and skidded package units — to international standards such as ASME, ASTM, API, TEMA and PED. Manufacturing is supported by in-house NDE testing and multi-material (carbon, stainless, Hastelloy, titanium, nickel alloy) capability at its 23,891m² Dangjin-si factory, with 20,000 tons of annual capacity for Oil & Gas, Chemical, Steel, Energy and Environmental sector customers.

Product overview

Seoul Machinery is a manufacturer of industrial process plant equipment serving the Oil & Gas, Chemical, Steel, Energy, and Environmental sectors since 1983. The company operates as a single unified product line of heavy industrial equipment, including Heat Exchangers, Pressure Vessels, Reactors, Towers & Columns, Drums & Tanks, and Package Units (Skids), all designed and fabricated to international standards such as ASME, ASTM, API, TEMA, and PED. The company also offers construction services alongside its equipment portfolio. Located at Dangjin Port in South Korea, the factory spans 23,891m² with an annual production capacity of 20,000 tons.

Differentiator

Problem solved

Functional benefit

Products and services

• Heat Exchangers Industrial heat exchangers for thermal transfer in process plants, designed and fabricated to ASME, TEMA and other international standards for Oil & Gas, Chemical, Steel, Energy and Environmental customers.
• Pressure Vessels ASME-certified pressure vessels for containing fluids and gases under pressure, serving the Oil & Gas, Chemical and Energy sectors and fabricated to ASME Section VIII Division 1 and Division 2 standards.
• Reactors Process reactors for chemical and petrochemical applications, designed to meet stringent industry standards and specifications with multi-material capability including exotic alloys.
• Towers & Columns Distillation towers and separation columns for refining and chemical processing applications in industrial process facilities.
• Drums & Tanks Storage drums and tanks for liquid and gas storage in industrial process facilities.
• Package Units (Skids) Prefabricated skidded process units and package systems for modular plant installations in Oil & Gas, Chemical and related process industries.
• Other Custom Process Equipment Additional custom-fabricated process equipment and specialized plant components beyond the standard catalog, leveraging multi-material and ASME-certified fabrication capability.

Quantifiable outcome

• Annual capacity of 20,000 tons
• +1 more outcomes

Named customers3 records

Segments5 records

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators4 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Doosan Enerbility: Korean heavy industrial manufacturer with significant pressure vessel and heat exchanger fabrication for power, petrochemical, and desalination. Competes for large EPC packages globally with broader product breadth.
• Babcock & Wilcox: US-headquartered legacy boiler and heat exchanger manufacturer with global EPC reach. Overlaps on ASME Section I/VIII fabrication and process heat transfer equipment for petrochemical and power customers.
• Chart Industries: US-based cryogenic and process equipment specialist serving LNG, petrochemical, and industrial gas. Comparable in pressure vessel and heat exchanger fabrication with focus on cryogenic and specialty alloys.
• Alfa Laval: Swedish multinational with major heat exchanger and process equipment portfolio for petrochemical, refining, and energy. Competes on standard plate, shell-and-tube, and specialty heat exchangers globally.
• Hanwha General Chemicals (Hanwha Ocean / Hanwha Heavy Industries): Large Korean industrial conglomerate with heavy fabrication and process equipment operations across petrochemical, power, and shipbuilding. Overlaps on pressure vessels and process modules but at much larger scale and broader portfolio.

Direct peers

• Hamon Group: Belgian-headquartered engineering and fabrication group specializing in heat exchangers, air-cooled systems, and cooling towers for power, petrochemical, and industrial customers. Direct competitor on process heat transfer equipment.
• CIMC ENRIC: Chinese manufacturer of pressure vessels, spherical tanks, and process equipment with extensive ASME and other international certifications. Direct global competitor on standard and cryogenic/LNG pressure vessels.
• Kelvion (formerly GEA Heat Exchangers): German-based manufacturer of shell-and-tube, plate, and specialty heat exchangers serving petrochemical, oil & gas, and power industries. Direct global competitor on process heat transfer equipment.
• Sungil Heavy Industries: Korean heavy industrial fabricator of pressure vessels, heat exchangers, and process plant equipment. Direct Asian competitor serving the same EPC and petrochemical customer base with comparable ASME-certified capabilities.

Regional players

• LS Mtron (Heavy Equipment Division): Korean industrial manufacturer with heavy fabrication capabilities relevant to industrial equipment supply chains. Regional adjacency in Korean industrial fabrication rather than direct process plant equipment overlap.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/seoul-machinery

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Seoul Machinery