Industrial Fabrication · Permenaker No. 02/MEN/1982
Certified Welder (Juru Las) Regulations in Indonesia: Class 1, 2 & 3 Certification
Statutory qualification framework for structural steelwork, pressure vessel fabrication, and industrial piping under Indonesian law: welder classes, non-destructive testing (NDT), and WPS/PQR validation.
The Three Statutory Welder Classes Explained
Under Minister of Manpower Regulation No. 02/MEN/1982, any welding performed on pressure vessels, steam boilers, lifting equipment, or load-bearing steel structures must be executed exclusively by a certified Juru Las holding an active license issued by Kemnaker:
| Welder Class | Permitted Welding Scope | Testing Positions Qualified | Target Engineering Sector |
|---|---|---|---|
| Kelas 1 (Class I) | High-pressure vessels, steam boilers, high-pressure hydrocarbon piping, all critical joints | All positions: 1G, 2G, 3G, 4G, 5G, 6G / 6GR | Oil & Gas, Power Plants, Petrochemical Refineries |
| Kelas 2 (Class II) | Medium pressure vessels, storage tanks, building structural steelwork | Plate & pipe in flat, horizontal, and vertical: 1G, 2G, 3G | EPC Infrastructure, Smelter Steel Construction |
| Kelas 3 (Class III) | Non-critical structural joints, non-pressurized tanks, general steel framing | Flat and horizontal positions: 1G, 2G | General Manufacturing, Warehousing Fabrication |