ASTM D6541-21 PDF
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St ASTM D6541-21
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Ст ASTM D6541-21
Original standard ASTM D6541-21 in PDF full version. Additional info + preview on request
Full title and description
Designation: ASTM D6541-21 — Standard Specification for HFC‑236fa, 1,1,1,3,3,3‑Hexafluoropropane (CF3CH2CF3). This specification defines chemical and quality requirements for HFC‑236fa when supplied for use as a fire‑fighting (fire‑suppression) agent, including classification of product types and required analytical limits for purity and contaminants.
Abstract
The standard covers requirements for HFC‑236fa as a fire‑fighting medium. Materials are classified into two types (Type I — mixtures of HFC‑236fa and nitrogen; Type II — pure HFC‑236fa). Mandatory quality attributes include limits on chemical purity, acidity, water content, non‑volatile residue, fixed gases in the vapor phase, and suspended matter/sediment, with referenced analytical procedures to verify conformance. The specification excludes fire‑fighting hardware and storage/transport practices (handled in separate documents).
General information
- Status: Published / Active.
- Publication date: Current edition approved June 1, 2021; published June 2021.
- Publisher: ASTM International (American Society for Testing and Materials).
- ICS / categories: 13.220.10 (Fire‑fighting); 71.080.20 (Halogenated hydrocarbons).
- Edition / version: D6541‑21 (2021 edition).
- Number of pages: 3 pages (concise specification).
Scope
Applies to HFC‑236fa provided for use as a fire‑extinguishing agent and sets chemical‑quality requirements and test limits required for acceptance. It does not cover fire‑extinguishing hardware, system design, or storage/transport procedures (those are addressed in separate ASTM practices such as D6427). The standard is intended to be used by manufacturers, purchasers, testing laboratories, and regulatory bodies to confirm agent quality and suitability for fire‑suppression applications.
Key topics and requirements
- Product classification: Type I (HFC‑236fa / nitrogen mixtures) and Type II (neat HFC‑236fa).
- Chemical purity requirements and maximum allowable impurities (specified limits for HFC‑236fa content and admissible fixed gases in the vapor phase).
- Analytical quality limits: acidity, water (moisture) content, non‑volatile residue, suspended matter or sediment.
- Referenced test/analysis methods: ASTM and related analytical practices (for example, references to methods for gas chromatography and halogenated solvent analysis where appropriate).
- Safety and regulatory caveats: the specification includes a safety warning related to test methods and notes users remain responsible for safety, health, and environmental compliance.
Typical use and users
Typical users include fire‑suppression agent manufacturers, chemical suppliers, purchasers and specifiers of fire‑protection systems, independent testing laboratories performing conformity testing, fire‑protection equipment manufacturers, and regulatory agencies that reference material specifications for acceptance or incorporation by reference. The standard is used to verify material quality before filling extinguishers or charging fixed suppression systems.
Related standards
Commonly referenced/associated ASTM documents include Practice D6427 (handling, transportation, and storage of HFC‑236fa), Practice/Methods for analysis of halogenated organic solvents (e.g., D6806 and related gas‑chromatography methods), and other refrigerant/agent specifications in the D26 series (for example, D6065, D6231, and related D‑standards for halogenated agents). Regulatory materials (for example, EPA/Federal Register listings) may reference ASTM D6541‑21 for compliance and incorporation by reference.
Keywords
HFC‑236fa; 1,1,1,3,3,3‑hexafluoropropane; CF3CH2CF3; FE‑36; fire‑fighting agent; fire suppression; hydrofluorocarbon; purity; water content; ASTM D6541.
FAQ
Q: What is this standard?
A: ASTM D6541‑21 is the ASTM International standard specification that defines chemical and quality requirements for HFC‑236fa when supplied for use as a fire‑fighting/suppression agent.
Q: What does it cover?
A: It covers product classification (Type I — mixtures with nitrogen; Type II — neat HFC‑236fa) and analytical limits and acceptance criteria for purity, acidity, water content, non‑volatile residue, fixed gases in the vapor phase, and suspended matter/sediment. It does not address hardware, system design, or storage/transport (see Practice D6427 for those topics).
Q: Who typically uses it?
A: Manufacturers and suppliers of HFC‑236fa, purchasers and specifiers of fire‑suppression agents, testing laboratories that perform quality verification, equipment manufacturers, and regulators referencing material specifications.
Q: Is it current or superseded?
A: The current designation is D6541‑21 (approved/published in 2021). Users should check ASTM or national adoption listings for any subsequent revisions or reapprovals after 2021.
Q: Is it part of a series?
A: Yes — it sits within ASTM Committee D26 work on halogenated organic solvents and fire‑extinguishing agents and is associated with related D26/D26.09 standards and practices covering handling, analysis, and specifications for other clean agents and refrigerant‑type fire suppressants.
Q: What are the key keywords?
A: HFC‑236fa; 1,1,1,3,3,3‑hexafluoropropane; CF3CH2CF3; FE‑36; fire‑fighting agent; hydrofluorocarbon; purity; water content; ASTM D6541‑21.