We Weld Responsibility
Into Every Line.
From 2nd HOOK-UP piping installation to BULK/TOXIC fabrication and maintenance in semiconductor cleanrooms — Saeroi Engineering protects every site on a zero-accident, zero-incident principle.
Field Experience Behind
Every Skilled Technician
Hello, we are Saeroi Engineering Co., Ltd.
Built on a team of technicians with deep field experience, we specialize in 2nd HOOK-UP piping installation and fabrication for semiconductor facilities, aiming for the highest standards of quality and safety as a trusted construction partner.
We continuously strive to improve our construction capabilities and remain committed to meeting the expectations of our clients and partners with responsibility and diligence.
Beyond Korea,
Into Austin, Texas.
Starting with a process contract on the U.S. TAYLOR PROJECT in 2024, we are now participating in the Samsung Engineering project in Austin, Texas — extending the 2nd HOOK-UP construction expertise built in Korea to the global stage.
Having completed the establishment of our U.S. subsidiary and built a local project response system, Saeroi Engineering is growing beyond a domestic semiconductor cleanroom construction partner into a global semiconductor infrastructure contractor.
Core Business Areas
From piping installation to specialty gas fabrication and maintenance — we handle the entire 2nd HOOK-UP process for semiconductor facilities.

2nd HOOK-UP Piping
We provide specialized installation and fabrication services for 2nd HOOK-UP piping in semiconductor facilities.

BULK / TOXIC Construction
We fabricate and install BULK GAS, BULK EXH, BULK PCW, and TOXIC piping systems.

Maintenance Services
We provide maintenance and decommissioning services for piping systems at semiconductor facilities.
Company History
Since 2014, Saeroi Engineering has built its track record and technical expertise in the semiconductor 2nd HOOK-UP field.
- Hwaseong 16-2L — maintenance & BULK fabrication
- Hwaseong 16-2L — maintenance & TOXIC fabrication
- Cheongju SK hynix M15 5D — design & fabrication
- Hwaseong 16-2L — maintenance & BULK construction
- Xi'an X1, China — 2nd BULK construction (manpower dispatch)
- Pyeongtaek P3L — BULK construction & decommissioning
- Hwaseong 17-2L — maintenance & BULK fabrication/decommissioning
- Hwaseong V1L — maintenance & 2nd HOOK-UP fabrication/decommissioning
- October 2023 — Saeroi Engineering Co., Ltd. incorporated
- Hwaseong 17-2L, V1 — maintenance & BULK fabrication/decommissioning
- Pyeongtaek P4 BBTech — BULK, S-GAS fabrication
- R&D center established; certified as a venture business
- U.S. TAYLOR PROJECT — process contract
- U.S. subsidiary established
MANUFACTURING
Equipment
We are fully equipped with professional welding and processing equipment for high-quality construction.
WELDING EQUIPMENT
- Auto Welding Machine AUTO WELD
- TIG Welder TIG
- Polysoude Welding Machine ORBITAL
PROCESSING EQUIPMENT
- Beveling Machine BEVELING
- Metal Cutter CUTTING
- Power Drill DRILLING
The Standard for Quality
and Safety, Internationally Certified
We systematically operate quality, occupational health & safety, and environmental management systems through internationally recognized certifications and government-issued credentials. Click any certificate to view the original document.










Organization
Led by the CEO, our organization consists of the Management Support Division, the BULK Division (HOOK-UP, Quality Control, and Project Support Teams), the S-GAS Division, and the Fabrication Division.
In-young Song
As the young leader of a young company, oversees overall management and business strategy.
Corporate Administration
Handles HR, finance, and general administrative functions across the company.
BULK · S-GAS · Fabrication
Responsible for HOOK-UP, quality control, project support, and welding/fitting/support fabrication.
Let's Build the
Next Site Together.
For inquiries about 2nd HOOK-UP, BULK/TOXIC construction, or maintenance services, please reach out using the contact information below.
- TEL+82 70-8657-3457Call
- FAX+82 504-336-3457
- EMAILsaero1005@naver.com
- ADDRESS335, 290 Godeok-jungang-ro, Pyeongtaek-si, Gyeonggi-do, Republic of Korea
335, 290 Godeok-jungang-ro,
Pyeongtaek-si, Gyeonggi-do, Korea