Quality Control & Certifications

Stable Supply of Industry-Leading Quality Products

Each member of our workforce recognizes their role as a “technical expert” as we strive to provide stable production of quality products in every endeavor from our meticulous quality control to our ongoing research and development for new industries such as aerospace and nuclear energy.
For quality control in particular, our dedication involves company-wide efforts such as start-to-finish control of material and temperature, a variety of testings, and final inspections.
Our engineering team also utilizes our CAD system to provide another key role in our framework of consistent quality control.

Quality Control

Our high-quality products, production system standards, and environmental awareness are all reflected by the various certifications we have received including ISO9001, ISO14001, and international maritime classification society certificates such as NK, LR and DNV.
Additionally, we’ve acquired JIS Q9100, the aerospace industry quality management system, with positive evaluations and support from our customers.


Quality Management Certificates

ISO 9001

ISO 14001

JIS Q 9100


ISO 45001


Certificates from Classification Societies

American Bureau of Shipping (ABS)

Bureau Veritas (BV)


Korean Register of Shipping (KR)

Korean Register of Shipping (KR) / Ultrasonic Testing (UT)

Lloyd’s Register of Shipping (LR)

Nippon Kaiji Kyokai (NK)

Nippon Kaiji Kyokai (NK) / Aluminum Alloy Material

Quality Inspection

Nondestructive Evaluation

Ultrasonic Testing (UT)

In this inspection, we test products with a device called an ultrasound probe equipped with a transducer to emit and receive ultrasonic waves.
With this device we can evaluate the reflected waves, or echoes, to determine the presence and location of possible blemishes.

Magnetic Particle Testing (MT)

With this test, we can observe for any magnetic flux leakage, which will indicate the presence of blemishes.
Magnetic particles are sprayed onto the surface of magnetized testing pieces. The particles are attracted to scratched areas, so any scratches can be detected through observation.

Testing Equipment

Hydraulic Brinell Hardness Tester

UMH Tensile Tester

Charpy Impact Tester

Charpy Impact Tester

Ultrasonic Tester


Testing Device Quantity
UMH Tensile Tester 1
Charpy Impact Tester 2
Hydraulic Brinell Hardness Tester 1
Shore Hardness Tester 4
King Hardness Tester 8
Testing Device Quantity
Ultrasonic Tester 7
Yoke Type Magnetic Particle Tester 6
Magnetizing Power Supply Equipment 2
Vacuum Emission Spectrometer 1
Metalloscope 1

Accredited Qualifications

Engineering Qualifications

Accreditation Class / Grade
Press Forging Technician Class 1
Press Forging Technician Class 2
Numerically Controlled Lathe Technician Class 1
Numerically Controlled Lathe Technician Class 2
General Metal Heat Treatment Technician Special Class
General Metal Heat Treatment Technician Class 1
General Metal Heat Treatment Technician Class 2
Metal Material Inspection Technician Class 1
Metal Material Inspection Technician Class 2
Mechanical Maintenance Technician Class 1
Mechanical Maintenance Technician Class 2

Inspection Qualifications

Accreditation Class / Grade
Ultrasonic Testing (UT) Grade 1
Ultrasonic Testing (UT) Grade 2
Ultrasonic Testing (UT) Grade 3
Magnetic Particle Inspection (MT) Grade 1
Magnetic Particle Inspection (MT) Grade 2
Penetrant Testing (PT) Grade 1
Penetrant Testing (PT) Grade 2
Radiographic Test (RT) Grade 2
Introduction Video