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What is KGS Factory Registration for Korea?

The KGS Factory Registration constitutes the general export license of pressure equipment manufacturers to Korea. The KGS certificate is issued by the Korea Gas Safety Corporation (KGS) for approved product categories. Without KGS factory registration, pressure equipment may not be imported into Korea, which is strictly checked by customs.

KGS Factory Registration for certain gas and pressure equipment was established to ensure that only manufacturers that meet certain quality and safety standards are allowed to export their products to Korea. The Korea Gas Safety Corporation, established in 1979, is entrusted with carrying out the approval process. After confirming compliance through a technical review and factory audit, the Ministry of Trade, Industry and Energy (MOTIE) will issue the factory registration.


South Korea has designated the hydrogen economy as a key factor for economic growth and for reaching the goal of carbon neutrality. As part of the Hydrogen Act certain product categories have been defined to require a KGS factory registration, to regulate and promote safety in this high-risk industry. This mainly concerns fuel cells (fixed and portable) and electrolysers (including PEM and AEM hydrogen generators). Additionally, South Korea is also building up a network of hydrogen refueling stations. Certain components used in these can require additional approvals, like testing according to KS B ISO 19880-3 or a KS certification. Especially in applications using liquified hydrogen, there are additional safety requirements and permits needed for the approval of components like pressure vessels or entire facilities. With regard to the hydrogen transportation sector, safety valves and pressure vessels on trailers or in ammonia-cracking plants are also relevant for KGS approvals.

The main objective of KGS certification is to prevent accidents caused by gas equipment and to increase safety in high-pressure applications. To ensure this, relevant equipment must comply with Korean standards and may only be imported by approved manufacturers. The authority requires verification of the production and quality assurance processes before the applicable products may be imported into Korea.

Which products require KGS Factory Registration?

KGS factory certification distinguishes between pressure equipment covered by the High-Pressure Gas Safety Act and gas equipment relevant under the Safety Control and Business of Liquefied Petroleum Gas Act:

High-Pressure Gas Cylinders etc. (subject to the High-Pressure Gas Safety Act)

1 Cylinders (excluded if internal volume is less than 300ml)
(Seamless Cylinders, Welded Cylinders, Cryogenic Gas Cylinders, Cylinders for Vehicles, Composite Cylinders (for LPG, Hydrogen or other High-Pressure Gases)
2Cylinder Accessories (valves and safety valves)
3Storage Tanks
4Pressure Vessels (Heat Exchanger or Drum, Tower, Reactors & others)
(applies to pressure vessels whose value of multiplying design pressure (MPa) and volume (m³) exceeds 0.004 as the pressure
or if the design pressure is 0.2 MPa or more for liquid gas at 35 ℃ and 1MPa or more for compressed gas at 35 ℃)
5High-Pressure Gas Tanks Fixed on Vehicles
6Emergency cut-off devices for high-pressure gases
7Safety valves for high-pressure gases
8Valves for toxic gas pipes
9Specified equipment for refrigeration:
Compressors, Condensers, Vaporizers and Pressure Vessels

Gas appliances (subject to the Safety Control and Business of Liquefied Petroleum Gas Act)

1Pressure Regulators
2Automatic Shut-off Device for Gas Leakage
3Filters for Governor Stations
4Governors for Underground Use(applies to pressure vessels whose value of multiplying design pressure (MPa) and volume (m³) exceeds 0.004 as the pressure
or if the design pressure is 0.2 MPa or more for liquid gas at 35 ℃ and 1MPa or more for compressed gas at 35 ℃)
5Hoses for Gases
6Valves for Pipes
7Gas Cocks
8Joints for Pipes
9Multifunctional Gas Meters
10Loading Arms
11Forced Mixing Type Gas Burners
12Gas Ovens and Gas Grills
13Gas Water Heaters, Gas Boilers
14Commercial Gas Burning Appliances
15Portable Butane and Propane Stoves

Hydrogen appliances (subject to the Hydrogen Act)

1Fixed Fuel Cells
2Portable Fuel Cells
3Water Electrolysis Hydrogen Generator
4Hydrogen Generators Using Fuel Processing

KGS Certification Process


Preparation of the application and documentation


Application submission & technical examination of submitted documentation


Factory Audit by KGS (several days) & issuance of the audit report


Application for MOTIE Factory Registration


Issuance of the Factory Registration

When applying for KGS factory registration for the above product categories, international standards may be used as a basis as part of the KGS certification process. A factory registration for pressure vessels or safety valves may for example be based on ASME Sec. VIII, Div.1 or PED + AD2000, which will then also be documented on the KGS certificate of factory registration. Some of the application documents for the technical inspection which the manufacturer needs to submit include lists of production and test equipment, process diagrams, a list of subcontractors and suppliers and a quality manual.

The initial factory inspection usually takes several days (usually 3-4 days). The length varies depending on the number of product categories and standards for which an application is submitted. KGS often requires further auditing of certain suppliers as part of the factory audit. Consequently, additional time must be calculated depending on the scope of the plant’s outsourced activities and the physical distance to the subcontractors.

If deviations are found during the factory inspection, KGS may ask for re-auditing, which is normally limited to the scope of corrective actions for the identified non-conformities. If only minor non-conformities are found these corrective actions may typically be validated by re-examining the submitted documentation. However, in case of major non-conformities KGS may even require a second on-site audit.

The KGS approval is valid for 3 years. Thereafter a follow-up audit will be required to extend the validity for an additional 3 years. For certain changes, or adding further product categories and standards, a separate audit is normally required. These audits focus on the changed or newly added items and do not extend the existing validity of the factory approval. For certain pressure equipment an additional individual acceptance of the respective products is necessary in a second step after having obtained the KGS factory registration.

KGS Marking

Each product category falling under the scope of the KGS factory registration has its own marking requirements. These usually include manufacturer information as well as product or design-specific data (such as: designed pressure and temperature, internal volume, material and date of manufacture & inspection).

For products that require an individual product approval after the manufacturing site has obtained the KGS factory registration (like pressure vessels), the KGS inspector will apply the KC stamp after successful completion of the inspection.

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KGS Factory registration Overview

Validity of KGS certificates3 years until the next follow-up audit
Certification period9-12 months
Factory audit required?Yes, verification of the production and quality assurance processes
Follow-Up processRegular follow-up audits required

KGS Factory registration FAQ

How do I know if my product needs KGS factory approval?

If your product can be classified in the above overview, a detailed check should be made to see if KGS factory registration is required. Please pay attention to the restrictions already listed in the two tables. We will be happy to assist you in the classification process.

How long does the KGS certification procedure take?

The process usually takes between 9-12 months.

Which certification authorities are approved for KGS factory registration?

KGS registration can only be conducted through the Korea Gas Safety Corporation (KGS). There are no foreign institutions accredited to conduct overseas factory audits or single-vessel approvals.

KGS Factory registration video

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