Regulatory Approvals

technology

JUNG-ANG ENG can produce pressure vessels and heat exchangers based on the relevant domestic regulations.

Pressure Vessel

Safety Certification (KCs) under the OSH Act

Machinery / Equipment	Scope
Machinery / Equipment	Pressure Vessel	Scope	Fluid handling vessels in chemical processes or vessels (air or nitrogen handling vessel) used in other processes for which gauged design pressure exceeds 0.2MPa(2kgf/cm²); vessels falling under any of the following categories are excluded. Vessels whose internal diameter, width, height, or section diagonal length is 150mm or less (nominal diameter 150A in case of using pipes), regardless of vessel length or pressure Nuclear vessels Water cooled tubular condensers (limited to cases where coolant is flowing in the shell side, and tube-side working pressure is lower than working pressure in the shell side) Vessels that handle only water with a service temperature of 60 °C or lower (additives in the water are allowed if the flashpoint of water base solution is 85 °C or higher under atmospheric pressure) Plate type heat exchanger Fin type air cooler Accumulator Hydraulic, water-pressure and pneumatic cylinders Pressure vessel that can hold people Tank lorry for vehicle Piping components used for the purpose of piping, flow measuring, or flow control. Silencers or strainers (including filters) falling under any of the following categories. 1) No weld joint, except welds to attach a flange 2) The exterior diameter of the body is 320mm or less, and the nominal diameter of the pipe joint is at least one-half the exterior diameter of the body. A part of the machinery and equipment forms a pressured area such as body or head in pressure vessel. The product of working pressure (unit: MPa) and vessel inner volume (unit: m³) is less than 0.1, and the vessel falls under any of the following categories. 1) A component of machine & equipment 2) Attached equipment of pressure devices such as pump or compressor and its purpose of use sealing, lubrication or heat exchange (but, fluid if handled for relevant processes does not falling under dangerous substances regulated in Occupational Safety and Health Standards Rules [Attached table 1]) Transport vessels to contain products for sales or supply Direct fired tube type process heater The scope of vessel evaluation is as follows. For welding connection to an external pipe, the scope covers the first weld joint in the circumferential direction. For screw connection to external pipe, the scope covers the first screw connection. For flange connection to external pipe, the scope covers the first flange. If attachments are welded directly to the internal pressure part, the scope covers that weld joint. The scope includes pressurized covering plates for manhole or handhole, weld joint, bolts & nuts, and gaskets. * Fluid handling vessels in chemical processes are facilities used to store, separate, transport, and mix the fluid required in chemical processes such as evaporation, absorption, distillation, drying, and adsorption, referring to columns (distillation column, absorption column, extraction column, decompression column, etc.), reactors, mixing tanks, heat exchangers (heater, cooler, evaporator, condenser, etc.), filters, and storage vessels, and include vessels that handle dangerous substances according to the Occupational Safety and Health Standards Rules [Attached table 1].

Machinery / Equipment

Scope

Machinery / Equipment

Pressure Vessel

Scope

Fluid handling vessels in chemical processes or vessels (air or nitrogen handling vessel) used in other processes for which gauged design pressure exceeds 0.2MPa(2kgf/cm²); vessels falling under any of the following categories are excluded.

Vessels whose internal diameter, width, height, or section diagonal length is 150mm or less (nominal diameter 150A in case of using pipes), regardless of vessel length or pressure
Nuclear vessels
Water cooled tubular condensers
(limited to cases where coolant is flowing in the shell side, and tube-side working pressure is lower than working pressure in the shell side)
Vessels that handle only water with a service temperature of 60 °C or lower
(additives in the water are allowed if the flashpoint of water base solution is 85 °C or higher under atmospheric pressure)
Plate type heat exchanger
Fin type air cooler
Accumulator
Hydraulic, water-pressure and pneumatic cylinders
Pressure vessel that can hold people
Tank lorry for vehicle
Piping components used for the purpose of piping, flow measuring, or flow control.
Silencers or strainers (including filters) falling under any of the following categories.
1. 1) No weld joint, except welds to attach a flange
2. 2) The exterior diameter of the body is 320mm or less, and the nominal diameter of the pipe joint is at least one-half the exterior diameter of the body.
A part of the machinery and equipment forms a pressured area such as body or head in pressure vessel.
The product of working pressure (unit: MPa) and vessel inner volume (unit: m³) is less than 0.1, and the vessel falls under any of the following categories.
1. 1) A component of machine & equipment
2. 2) Attached equipment of pressure devices such as pump or compressor and its purpose of use sealing, lubrication or heat exchange
  (but, fluid if handled for relevant processes does not falling under dangerous substances regulated in Occupational Safety and Health Standards Rules [Attached table 1])
Transport vessels to contain products for sales or supply
Direct fired tube type process heater

The scope of vessel evaluation is as follows.

For welding connection to an external pipe, the scope covers the first weld joint in the circumferential direction.
For screw connection to external pipe, the scope covers the first screw connection.
For flange connection to external pipe, the scope covers the first flange.
If attachments are welded directly to the internal pressure part, the scope covers that weld joint.
The scope includes pressurized covering plates for manhole or handhole, weld joint, bolts & nuts, and gaskets.
* Fluid handling vessels in chemical processes are facilities used to store, separate, transport, and mix the fluid required in chemical processes such as evaporation, absorption, distillation, drying, and adsorption, referring to columns (distillation column, absorption column, extraction column, decompression column, etc.), reactors, mixing tanks, heat exchangers (heater, cooler, evaporator, condenser, etc.), filters, and storage vessels, and include vessels that handle dangerous substances according to the Occupational Safety and Health Standards Rules [Attached table 1].

Notice on Procedures for Safety Certification and Self-Declaration of Safety Confirmation (No. 2022-69) - Article 2 (1) [Attached table 1]

Type	Item Name	Scope
Type	Pressure Vessel	Class A	What is a class A pressure vessel? A fluid handling vessel with a gauged design pressure that exceeds 0.2MPa(2kgf/cm²), and an air or nitrogen handling vessel with a gauged design pressure that exceeds 1MPa(10kgf/cm²)
Class B	Pressure Vessel	Vessels other than class A pressure vessel

* Notification of safety certification for dangerous machine & equipment (No. 2023-46) - Chapter 5 Section 1 Article 10 Subparagraph 2

Procedure for Pressure Vessel

Notice on Safety Certification of Dangerous Machinery and Equipment (No. 2023-46) - Chapter 5, Section 2, Article 11 (3) [Attached Table 4-1]

Class A

STEP 01Document Review
STEP 02Material Review
STEP 03Welding Review
STEP 04Pressure Resistance Review
STEP 05Issuance of Safety Certificate

Class B

STEP 01Document Review
STEP 02Pressure Resistance Review
STEP 03Issuance of Safety Certificate

Safety Inspection

Periodic inspection that the employer (owner) using hazardous or dangerous machinery (such as pressure vessels) at a workplace must undergo to confirm that its safety meets the inspection standards Article 93 (1) of the Occupational Safety and Health Act

Subject to inspection
Article 78 (1) 5 of the Enforcement Decree Of The Occupational Safety And Health Act, Article 3 of the notification of safety inspection procedure (No. 2026-50, effective 2026.6.26) [Attached table 1]

Fluid handling vessels in chemical processes or vessels (air or nitrogen handling vessel) used in other processes with a gauged design pressure exceeds 0.2MPa(2kgf/cm²); vessels falling under any of the following categories are excluded.

Vessels whose internal diameter, width, height, or section diagonal length is 150mm or less (nominal diameter 150A if using pipes), regardless of vessel length or pressure
Nuclear vessels
Water cooled tubular condensers
(limited to cases where coolant is flowing in the shell side, and tube-side working pressure is lower than working pressure in the shell side)
Vessels that handle only water with a service temperature of 60 °C or lower
(small amounts of additives in the water are allowed if the flashpoint of water base solution is 85 °C or higher under atmospheric pressure)
Plate type heat exchanger
Fin type air cooler
Accumulator
Hydraulic, water-pressure and pneumatic cylinders, and oil injectors/ejectors
Pressure vessel that can hold people
Tank lorry for vehicle
Piping components used for the purpose of piping, flow measuring, or flow control.
Silencers or strainers (including filter), falling under any of the following categories.
1. 1) No weld joint, with the exception of welds to attach a flange
2. 2) Exterior diameter of the body is 320mm or less, and the nominal diameter of pipe joint is at least one-half of exterior diameter of the body
A part of the machinery and equipment forms a pressured area such as body or head in a pressure vessel.
The product of working pressure (unit: MPa) and vessel inner volume (unit: m³) is less than 0.1, and the vessel falls under any of the following categories.
1. 1) A component of machine & equipment
2. 2) Attached equipment of pressure devices such as pump or compressor, for which the purpose of use is sealing, lubrication or heat exchange
  (but, fluid if handled for relevant process must not be a dangerous substances regulated in Occupational Safety and Health Standards Rules [Attached table 1])
Transport vessels to contain products for sales or supply
Direct fired tube type process heater
Sealed expansion tank for non-industrial use
A component of machine & equipment subject to safety inspection
A component of a small air compressor (reciprocating compressor is fixed or attached on top of pressure vessel)
Pressure vessels with a working pressure of less than 2kgf/cm²
Vessels whose safety has been confirmed, or which are excluded, under other laws such as the High-Pressure Gas Safety Control Act

Scope of vessel inspection

For welding connection to an external pipe, the scope covers the first weld joint in the circumferential direction.
For screw connection to an external pipe, the scope covers the first screw connection.
For flange connection to an external pipe, the scope covers the first flange.
If attachments are welded directly to the internal pressure part, the scope covers that weld joint.
The scope includes pressurized covering plates for manhole or handhole, weld joint, bolts & nuts, and gaskets.
※ Fluid handling vessels in chemical processes are facilities used to store, separate, transport, and mix the fluid required for chemical processes such as evaporation, absorption, distillation, drying, and adsorption, referring to columns (distillation column, absorption column, extraction column, decompression column, etc.), reactors, mixing tanks, heat exchangers (heater, cooler, evaporator, condenser, etc.), filters, and storage vessels, and include vessels that handle dangerous substances as per the Occupational Safety and Health Standards Rules [Attached table 1].

Penalties (safety certification) Article 169 1 of the Occupational Safety and Health Act

Imprisonment with labor for up to 3 years or a fine of up to KRW 30 million

A person who fails to obtain safety certification in violation of Article 84 (1)

Penalties (safety inspection) Article 175 (4) 3 of The Occupational Safety And Health Act

Administrative fine of up to KRW 10 million

Article 41 (2) (including where applied mutatis mutandis under Article 166-2), Article 42 (1) (5) and (6), Article 44 (1) former part, Article 45 (2), Article 46 (1), Article 67 (1) and (2), Article 70 (1), Article 70 (2) latter part, Article 71 (3) latter part, Article 71 (4), Article 72 (1) (3) and (5) (applicable only to construction work contractors),
A person who violates Article 77 (1), Article 78, Article 85 (1), Article 93 (1) former part, Article 95, Article 99 (2), main sentence, other than the part of the subparagraphs, of Article 107 (1).

Inspection interval
Article 126 (1) 3 of the Enforcement Rule Of The Occupational Safety And Health Act

For pressure vessels, the first safety inspection shall be conducted within 3 years from the date of finishing installation in the workplace. After that, a safety inspection shall be conducted biennially. (Quadrennially for pressure vessels confirmed by submitting a process safety report.)

Exemption from safety certification Article 109 (1) 3 and 7 of the Enforcement Rule of the Occupational Safety and Health Act

Pressure vessels inspected under Article 39 (1) and (2) of the Energy Use Rationalization Act
Pressure vessels inspected under Article 17 (1) of the High-Pressure Gas Safety Control Act

Exemption from safety inspection Article 125 of the Enforcement Rule of the Occupational Safety and Health Act

Continued-use inspection passed under Article 39 (4) of the Energy Use Rationalization Act
Inspection passed under Article 17 (2) of the High-Pressure Gas Safety Control Act
Periodic inspection passed under the main text of Article 24 (3) of the Chemicals Control Act

Certification and inspection bodies Articles 88 and 96 of the Occupational Safety and Health Act

Safety certification : Minister of Employment and Labor (performed by designated safety certification bodies such as the Korea Occupational Safety and Health Agency)
Safety inspection : Minister of Employment and Labor (performed by designated safety inspection bodies such as the Korea Occupational Safety and Health Agency)

* Occupational Safety and Health Act (effective 2026.10.27), its Enforcement Decree and Enforcement Rule (effective 2026.8.1), Notice on Safety Inspection Procedures (No. 2026-50), Notice on Safety Certification of Dangerous Machinery and Equipment (No. 2023-46)