YEON HAB DEVELOPMENT Co.,Ltd.

What YEON HAB DEVELOPMENT Co.,Ltd. does

YEON HAB DEVELOPMENT Co.,Ltd. (연합개발(주)) is a privately held Korean industrial construction subcontractor founded in 1992 and headquartered in Hwaseong-si, Gyeonggi-do. The company specializes in mechanical equipment installation and piping fabrication for industrial facilities, organized into three divisions: power generation, petroleum/chemical/gas plant, and environment/energy/renewable energy. It holds first-class construction licenses covering machinery equipment, gas facilities, steel structure, earthwork, and renewable energy specialist scopes, together with ISO 9001, ISO 14001, and ISO 45001 certifications.

The firm operates as a project-based subcontractor, executing work under prime contractors on large industrial sites rather than selling standardized products. Its customer roster includes Korean EPC and industrial majors such as SK ecoplant, SK Hynix, POSCO, Hyundai E&C, and Korea Western Power, alongside international principals including PERTAMINA, Sarulla Geothermal, and DIG AIRGAS. The business has executed 219 documented projects to date, with recent activity extending into Southeast Asia (Indonesia, Cambodia) and into emerging energy sub-verticals such as fuel cells, hydrogen, and geothermal.

With 5 listed employees, YEON HAB DEVELOPMENT functions as a small administrative core that mobilizes project-based field crews on demand, a typical operating model for specialist Korean mechanical subcontractors. Revenue is generated through milestone- and completion-based contract billing tied to individual installation scopes on larger prime-led projects. The firm has no disclosed parent company, no external funding rounds, and no M&A activity, positioning it as an independently operated, owner-managed subcontractor.

Name

YEON HAB DEVELOPMENT Co.,Ltd.

Legal name

연합개발(주)

Website

https://yhdc.co.kr

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

YEON HAB DEVELOPMENT Co.,Ltd. is a privately held Korean industrial subcontractor founded in 1992, specializing in mechanical equipment and piping installation for power, petrochemical, gas, and renewable energy facilities under major Korean EPC primes and international clients including PERTAMINA.

Ownership category

akta.pro rank

Product category

Industrial Construction Services

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220), Industrial Building Construction (23621)

SIC

Water, Sewer, Pipeline, Comm & Power Line Construction (1623), Fabricated Plate Work (Boiler Shops) (3443)

akta.pro primary industry

Balance-of-Plant (BOP) & Civil Works for Power Plants (EUAEAAAL)

akta.pro secondary industry

Civil & Site Works EPC (Earthworks, Roads, Drainage, Foundations) (EUAEADAA)

Keywords

• Mechanical piping installation
• Industrial construction services
• Power plant construction
• Petrochemical plant construction
• Renewable energy infrastructure

Headquarters

HQ city

Hwaseong-si (화성시)

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Infrastructure

Revenue model

1. Construction and Engineering Services: Project-based revenue from mechanical installation, piping, and steel structure work on industrial construction projects. Revenue recognized upon project completion based on contract terms.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels1 record

Core offering

YEON HAB DEVELOPMENT is a specialist industrial construction subcontractor providing mechanical equipment installation, piping systems fabrication and erection, and steel structure construction for power generation, petrochemical/chemical/gas plant, and renewable energy facilities. The company delivers project-based installation services as a mechanical/piping specialist on large-scale industrial EPC projects across South Korea, Indonesia, and Cambodia.

Product overview

YEON HAB DEVELOPMENT Co.,Ltd. is an industrial engineering and construction company operating three core business divisions: Power Generation & Maintenance, Petroleum/Chemical/Gas Plant construction, and Environmental/Renewable Energy services. The company specializes in mechanical piping installation, steel structure erection, and industrial equipment installation. Their service portfolio includes fuel cell power plant construction, biomass and geothermal power projects, refinery and petrochemical plant construction, and industrial gas facility services. The company also provides specialized services in mechanical piping construction and steel structure installation for various industrial applications.

Differentiator

Problem solved

Functional benefit

Products and services

• Power Generation & Maintenance Services (발전/정비 서비스) Engineering and construction services for power generation facilities including biomass power plants, geothermal projects, and collective energy systems. Services include boiler installation, mechanical equipment setup, piping work, and steel structure erection.
• Petroleum/Chemical/Gas Plant Services (정유/화학/가스플랜트 서비스) Construction and maintenance services for refineries, chemical plants, and gas facilities, including mechanical installation, piping systems, steel structures, and industrial gas supply equipment such as air separation units and cold box systems.
• Environment/Energy/Renewable Energy Services (환경/에너지/신재생 서비스) Environmental engineering and renewable energy construction services focused on fuel cell power generation projects, wastewater treatment systems, and green energy infrastructure development.
• Mechanical Piping Construction (기계배관공사) Specialized mechanical piping installation and construction services including pipeline fabrication, pipe rack installation, and integrated piping systems for industrial facilities.
• Steel Structure Construction (철골/구구조물 공사) Steel structure fabrication, erection, and installation services for industrial and power generation facilities.

Named customers10 records

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Six partnerships are on record, tiered core and minor.

• SK ecoplant (SK에코플랜트)coreImplementation/ SI/ Consulting PartnerPrimary prime contractor relationship for renewable energy projects. Executes fuel cell and environmental engineering projects as specialist mechanical/piping contractor for SK ecoplant projects including power plant construction across South Korea.
• Hyundai Engineering & ConstructioncoreImplementation/ SI/ Consulting PartnerInternational partnership for geothermal power project in Indonesia (Sarulla Geothermal Power Project). Provided pipeline construction and piping erection work as specialist subcontractor.
• POSCO Engineering & Construction (포스코건설)coreImplementation/ SI/ Consulting PartnerLong-standing partnership on steel mill and power plant construction projects including POSCO Pohang steel works oxygen facility installation and POSCO Power LNG combined cycle power plant projects.
• DIG AIRGAScoreImplementation/ SI/ Consulting PartnerOngoing partnership for industrial gas plant construction including cold box installation, gas supply pipeline work, and facility mechanical installation at various DIG AIRGAS plants across Korea.
• SK Air Plus (SK에어플러스)coreImplementation/ SI/ Consulting PartnerPartnership for SK Hynix semiconductor fab gas plant projects including CDA, N2, O2, and H2 system mechanical and piping installation at Ichon and Cheongju facilities.
• Hyundai Rotem (현대로템)minorImplementation/ SI/ Consulting PartnerOxygen plant construction work for Hyundai Steel facilities including pipe rack installation and mechanical/piping work at 3rd and 4th generation oxygen plants.

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Market position

Strengths4 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/yeon-hab-development-co-ltd

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 YEON HAB DEVELOPMENT Co.,Ltd.