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D5632 – Standard Test Method Technical Guide
ASTM D5632/D5632M-17 (Reapproved 2022) is the definitive standard specification for Halon 1301, established under the jurisdiction of ASTM Subcommittee D26.09 on Fire Extinguishing Agents. This document provides the chemical and physical requirements for Bromotrifluoromethane (CF3Br) as a fire-fighting medium, and has been approved for use by agencies of the U.S. Department of Defense. The standard was developed in accordance with internationally recognized principles of standardization as set forth by the WTO TBT Committee.
🧪 Composition and Purity Requirements
The standard specifically defines Halon 1301 as the halogenated hydrocarbon compound Bromotrifluoromethane (CF3Br). To ensure its effectiveness and safety in fire suppression applications, the agent must meet strict purity and contamination limits. The following table summarizes the critical property requirements mandated by this specification.
| ⚗️ Property | 🎯 Specification Limit | 📜 Reference Method |
|---|---|---|
| Purity (as CF3Br) | ≥ 99.6 mol % | AHRI Std 700 App. C |
| Acidity (as HCl) | ≤ 3 ppm by weight | AHRI Std 700 App. C |
| Water Content | ≤ 10 ppm by weight | AHRI Std 700 App. C |
| Non-Volatile Residue | ≤ 100 ppm by volume | AHRI Std 700 App. C |
| Color, Pt-Co Scale | ≤ 10 | ASTM D2108 |
| Suspended Matter / Sediment | None visible | Visual Inspection |
📏 Scope, Units, and Critical Exclusions
The scope of this specification is strictly limited to the requirements for Halon 1301 as a fire-fighting medium. It explicitly does not address the design, performance, or conditions of use of fire-fighting equipment or hardware such as handheld extinguishers or fixed installations. Furthermore, the storage, handling, and transportation of Halon 1301 are excluded from this standard and are fully covered under Practice D5631. The standard allows values to be stated in either SI units or inch-pound units; to ensure conformance, each system of units must be used independently without combining values from the two systems.
⚙️ Analytical Methods, Safety, and Regulatory Context
Rigorous quality control is enforced through specific sampling and test methods. The standard mandates that sampling of the liquefied gas must be conducted in accordance with ISO 3427. Chemical analysis is performed following the procedures in Appendix C of AHRI Standard 700-2014. Specific safety hazard statements related to the execution of these test methods are detailed in Section 4.5 of the standard. Regulatory compliance with U.S. DOT Hazardous Materials Regulations, including labeling and communication requirements in 49 CFR Part 172, is also required.
⚠️ Safety Warning: This standard does not purport to address all safety concerns, if any, associated with its use. It is the responsibility of the user to establish appropriate safety, health, and environmental practices and to determine the applicability of regulatory limitations prior to use. Specific hazard statements pertaining to the test methods are provided in Section 4.5.
💡 Complementary Reference: For comprehensive guidance on the safe handling, storage, and transportation of Halon 1301 throughout its lifecycle, refer to Practice D5631, which covers the logistical and safety aspects explicitly excluded from this specification.
❓ Frequently Asked Questions
🔍 What is the exact chemical composition of Halon 1301?
Halon 1301 is the common terminology designation for the halogenated hydrocarbon compound Bromotrifluoromethane (CF3Br), a fire extinguishing agent.
📌 Which specific analytical methods are used to verify compliance with this standard?
The standard requires sampling according to ISO 3427. The primary chemical analysis follows AHRI Standard 700-2014, Appendix C. Color testing is performed in accordance with ASTM D2108.
💡 Does ASTM D5632 cover the equipment that uses Halon 1301?
No