UL 2129 2021 pdf download – Halocarbon Clean Agent Fire Extinguishers.
6.3 A disposable extinguisher shall not be rechargeable. 6.4 An extinguisher having a volume in excess of 2.3 L (140 in 3 ) shall be capable of standing in the upright position without support. 6.5 A material for an extinguisher part, the deterioration of which causes the extinguisher to become inoperable or results in risk of injury to persons, shall not be susceptible to stress corrosion. 6.6 A polymeric or other nonmetallic part, other than an “O” ring or gasket, shall be evaluated on the basis of: a) Mechanical strength, including resistance to impact, see Handle and Mounting Device Test, Clause 28; Hydrostatic Pressure Test, Clause 39; Vibration Test, Clause 40; Roadability and Rough Usage Tests, Clause 41; Burst Strength Test – Gauges and Indicators, Clause 50; Nameplate Exposure Tests, Clause 58; b) Moisture absorption, see Salt Spray Corrosion Test, Clause 45; One-Year Time Leakage Test, Clause 48; Nameplate Exposure Tests, Clause 58; c) Flammability, see 6.7; d) Resistance to deterioration due to aging, see Aging Tests – Polymeric Materials, Clause 43; One-Year Time Leakage Test, Clause 48; Nameplate Exposure Tests, Clause 58; e) Exposure to light and water, see 43.3; Nameplate Exposure Tests, Clause 58; and f) Exposure to the extinguishing agent, see 43.2. 6.7 With reference to flammability, polymeric materials shall be classified as HB, V-0, V-1, V-2, 5VA, or 5VB, when tested in accordance with the Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL 94. Other nonmetallic materials shall have equivalent characteristics. 6.8 An extinguisher shall operate as intended from the minimum storage temperature to 49°C (120°F), inclusive. Currently recognized minimum storage temperatures are minus 40°C (minus 40°F) and minus 54°C ( minus 65°F).
7 Cylinders 7.1 The requirements in this clause do not apply to a rechargeable cylinder marked as complying with U. S. Department of Transportation (DOT), or Canada Transportation of Dangerous Goods Regulations (TDGR), or ASME specifications, unless otherwise specifically indicated. 7.2 An extinguisher cylinder under the jurisdiction of the DOTor TDGR shall comply with the appropriate DOTor TDGR specifications for shipping containers. 7.3 An extinguisher cylinder shall be fabricated of a material having rigidity, durability, and resistance to corrosion at least equivalent to: a) An aluminum alloy such as 6061-T6 or 6351-T6, see the Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate, ASTM B209, having a minimum thickness of 0.71 mm (0.028 in); b) An aluminum alloy, such as 1100, 1170, or 3003 having a minimum thickness of 0.71 mm (0.028 in); c) A mild steel alloy, such as SAE 1010, having a minimum thickness of 0.71 mm (0.028 in); or d) An austenitic stainless steel having a maximum of 0.03 percent carbon content and having a wall thickness of at least 0.63 mm (0.025 in).