Thailand Moves to Mandate TIS 332-2567 for Dry-Chemical Portable Fire Extinguishers

On 20 October 2025, Thailand notified the WTO of a draft ministerial regulation requiring all dry-chemical portable fire extinguishers—new and refilled—to conform to Thai Industrial Standard (TIS) 332-2567 (2024).

The draft regulation was submitted by the Thai Industrial Standards Institute (TISI) under the Ministry of Industry. It covers portable extinguishers (ICS 13.200.20) with a total mass not exceeding 25 kg that are suitable for Class A, B, and C fires. According to the WTO notification, the regulation will take effect 180 days after publication in the Government Gazette, with the final adoption date yet to be determined. The deadline for stakeholder comments is 19 November 2025.

Scope and Technical Requirements

Product scope

TIS 332-2567 applies to new portable units and recognizes two configurations: gas-cartridge type and stored-pressure type. Charge size must be ≥ 1 kg and < 14 kg as labeled.

Performance and discharge

Units must meet discharge-duration thresholds per size and achieve prescribed discharge efficiency; fire-rating tests reference ANSI/UL 711 for Classes A/B/C.

Pressure integrity and construction

Cylinders and joints must withstand at least twice the working pressure (not less than 2.4 MPa) without leakage or deformation; additional hydrostatic and durability tests are detailed, including impact-aging, conditioning, and intermittent discharge sequences.

Materials, coating, safety devices

Internal lacquer or equivalent is required to resist corrosion; external coatings must provide suitable anti-corrosion protection. Safety devices and selected component tests incorporate ANSI/UL 299 methods; user manuals follow TIS 405.