ARMY MIL-DTL-32412-2012 HFC-227ea FIRE EXTINGUISHING AGENT ENHANCED WITH SPECIAL SODIUM BICARBONATE POWDER (HFC-227ea SBCS).pdf
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1、 MIL-DTL- 32412 10 December 2012 . DETAIL SPECIFICATION HFC-227ea FIRE EXTINGUISHING AGENT ENHANCED WITH SPECIAL SODIUM BICARBONATE POWDER (HFC-227ea/SBCS) This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification esta
2、blishes the requirements and verification methods for two HFC-227ea/SBCSFire Extinguishing agents. For the purpose of simplicity, the term Agent will be used to denote the HFC-227ea/SBCS Fire Extinguishing agents. The purpose of these two Agents is to provide Army Aviation weapon systems, when in th
3、e proper hardware configuration, with an acceptable extinguisher configuration that does not employ an extinguishing mixture classified as an ozone-depleting substance (ODS). 1.2 Classification. The two Agents are free-flowing slurries of specialized sodium bicarbonate (SBCS) powder suspended in HFC
4、-227ea that will be used in fire extinguishing hardware (see 6.5 for a list of fire extinguishing hardware specifications) which is not covered in the scope of this document. The Agents are comprised of 1,1,1,2,3,3,3-Heptafluoropropane compound (generically named HFC-227ea) containing either of two
5、SBCSpowders held in long term suspension as free-flowing slurries. The Agents will be further designated as either a Class I or Class II composition depending on the specific sodium bicarbonate employed in creating the slurry. The SBCSpowders employed in these Agents will be either of two types, des
6、ignated as SBC-1 and SBC-2. The two Agent Classes are described in detail below and will be specified in the contract or purchase order (see 6.2). AMSC N/A FSC 4210 DISTRIBUTION STATEMENT A. Approved for public release; distribution unlimited. METRIC Comments, suggestions, or questions on this docum
7、ent should be addressed to: Director, U.S. Army Research Laboratory, Weapons and Materials Research Directorate, Materials and Manufacturing Technology Branch, Specifications and Standards Office, Attn: RDRL-WMM-D, Aberdeen Proving Ground, MD 21005-5069 or emailed to richard.j.squillacioti.civmail.m
8、il. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.dla.mil/. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32412 2 1.2.1 Class I. Class
9、 I Agents will contain SBC-1 (the sodium bicarbonate component prepared by size reduction processing (for example: utilizing Jet-Milling, as detailed in Appendix B) of United States Pharmacopeial (USP) grade sodium bicarbonate raw material). 1.2.2 Class II. Class II Agents will contain SBC-2 (from m
10、ethods of processing USP grade sodium bicarbonate starting material that produce a preponderance of nanometer particles). 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cite
11、d in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this
12、specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are t
13、hose cited in the solicitation or contract. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-1916 - Preferred Methods for Acceptance of Product (Copies of these documents are available online at https:/assist.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4
14、D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated (see 6.2), the issue in effect on date of invitation for bids or request for proposal should apply. ASTM INTERNATIONA
15、L ASTM D6064 - Standard Specification for HFC-227ea, 1,1,1,2,3,3,3- Heptafluoropropane (CF3CHFCF3) (Copies of these documents are available from www.astm.org or ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959.) 2.4 Order of precedence. Unless otherwise noted
16、herein or in the contract, in the event of a conflict between the text of this document and the references cited herein (except for related specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specif
17、ic exemption has been obtained. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32412 3 3. REQUIREMENTS 3.1 First Article. When specified in the contract or purchase order (see 6.2 and 6.4), a sample shall be subjected to first article inspec
18、tion in accordance with (IAW) paragraph 4.2. 3.2 Agent sample source. Blended slurry samples shall not be obtained from a bulk tank that is pressurized above the vapor pressure of HFC-227ea. The only pressure within the bulk slurry tank shall be the vapor pressure of HFC-227ea that correlates to the
19、 temperature of the working environment. 3.3 Material and components. The materials and components shall conform to applicable specifications, standards, and patterns as specified herein and Table I. All the materials shall be capable of meeting all the operational and environmental requirements spe
20、cified herein. 3.3.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes econom
21、ically advantageous life cycle costs. HFC-227ea materials shall meet the requirements specified in ASTM D6064. Refer to paragraph 6.6. 3.3.2 Pre-Slurry and Post-Slurry Powder Requirements. The SBCSemployed in the preparation of the HFC-227ea/SBCSsuspensions shall be either SBC-1 or SBC-2 as specifie
22、d in the contract or order (see paragraph 6.2). The resulting Agent slurries will be designated either Class I or Class II Agent, respectively. Materials shall not be added to improve the fluidity, appearance, and non-caking characteristics of the SBCS. Note: Only USP grade sodium bicarbonate and ma
23、terials derived by physical processing are acceptable. No chemical additives to the sodium bicarbonate or HFC-227ea are allowed. 3.3.3 Agent chemical and physical requirements. The SBCS(Class I or Class II) moisture content, color, aspect ratio, surface area, size requirement and size distribution,
24、shall be as specified in Table I and verified in accordance with 4.5.1, 4.5.2, 4.5.5, 4.5.6, 4.5.7, and 4.5.8. The agents caking and lumping tendency, flow, suspendability and concentration shall be as specified in Table I and verified in accordance with 4.5.1, 4.5.3, 4.5.4 and 4.5.9. Provided by IH
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