Document O5d7wOq6Qe29G2JvnRD0MOaM

MIL-F-23905B(AS) 25 April 1967 Superseding MIL-F-23905A(WP ) 26 March 1965 MILITARY SPECIFICATION FIRE EXTINGUISHING AGENT, "LIGHT WATER" LIQUID CONCENTRATE, (6 PERCENT) This specification has been approved by the Naval Air Systems Command, Department of the Navy 1. SCOPE. 1.1 This specification covers the requirements for one type and grade of "Light Water" liquid concentrate fire extinguishing agent consisting of non-toxic fluorocarbon surfactants and appropriate foam stabilizers. The material shall be suitable for use in conjunction with potassium dry chemical fire extinguishing agent in suitably de signed "twinned" equipment and in suitably designed foam-forming devices. The liquid concentrate shall be diluted or proportioned by suitably de signed equipment for use in concentrations of six parts concentrate to ninety-four parts water by volume. 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein. SPECIFICATIONS Federal PPP-B-601 Box, Wood, Cleated-Plywood PPP-B-621 Box, Wood, Nailed and Lock-Corner PPP-P-704 Copyright Naval Air Systems Command Provided by IHS No reproduction or networking permitted without license from IHS Pails, Shipping, One through Twelve Gallons ; ............. I FSC 4210 Licensee=Naval Sea Systems Command/9991451100, User= Fletcher, Steve Not for Resale, 11/28/2016 13:02:01 MST US00006313 MIL-F-23905B(AS) .Military MIL-F-22287 Fire Extinguishing Agent, Potassium Dry Chemical STANDARDS Military MIL-STD-105 Sampling Procedures and Tables for Inspection by Attributes MIL-STD-129 Marking for Shipment and Storage MIL-STD-147 Palletized Unit Loads, 40" x 48" 4-Way Partial and 4-Way Pallets (When requesting specifications, standards and publications refer to both the title and number. Copies of this specification and appli cable specifications may be obtained upon application to the Command ing Officer, Naval Supply Depot (CDI), 5801 Tabor Avenue, Philadelphia, Pennsylvania 19120). 2.2 Other publications - The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation foT' bids or request for proposal shall apply. Americal Society for Testing and Materials ASTM-D445-61 Test for Kinematic Viscosity ASTM-D-1298-55 Test for Specific Gravity of Petroleum Liquids, Hydrometer Method ASTM-D1331-56 . Tests for Surface and Interfacial Tension of Solutions of Surface Active Agents (Application for copies of ASTM publications should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103). 2 Copyright Naval Air Systems Command Provided by IHS No reproduction or networking permitted without license from IHS Licensee=Naval Sea Systems Command/9991451100, User=Fletcher, Steve Not for Resale, 11/28/2016 13:02:01 MST US00006314 MIL-F-23905BCAS) 3. REQUIREMENTS 3.1 Preproduction - The fire extinguishing agent, "Light Water" liquid concentrate furnished under this specification shall be a product which has been inspected and passed the preproduction in spection specified herein. 3.2 Data requirements - No data is required by this speci fication (other than reports accompanying samples submitted for prepro duction testing), or by applicable documents referenced in Section 2 , unless specified in the contract or order. (see 6.2). 3.3 Chemical and physical requirements - The "Light Water" liquid concentrate shall conform to the requirements of Table 1 when tested as specified therein. The material shall consist of non-toxic fluorocarbon surfactants, and shall not give off toxic vapors when sub jected to intense heat. 3.4 Performance requirements - 3.4.1 Foamability - The solution of "Light Water" concentrate in water (six parts concentrate to ninety-four parts water by volume) shall produce a foam possessing an expansion with a limit of 7.0 minimum and a 25 percent drainage time of 2-1/2 minutes minimum value when tested as specified in 4.5.7. 3.4.2 Film formation and sealability - The foam produced by the sample shall spread over the surface of the fuel when tested as speci fied in 4.5.8 and result in a surface from which no sustained ignition of fuel vapors can be detected. TABLE I CHEMICAL AND PHYSICAL REQUIREMENTS Requirement__________________________ Limits/Value __ Specific Gravity at 25 3C (77 5F) , minimum 1.075 Viscosity in centistokes at 25 0.5OC (77 1F) 50-150 Viscosity in centistokes at 4.4 0.5C (40 1F) maximum 300 Refractive Index (n25/D) 1.3750 pH value 25 3C (77 5F) , minimum 4.2 Surface tension, dynes per centimeter at 25 3C (77 5F), maximum 20.0 1.3850 Test Paragraph 4.5.1 4.5.2 4.5.2 4.5.3 4.5.4 4 .5.5 Copyright Naval Air Systems Command Provided by IHS No reproduction or networking permitted without license from IHS 3 Licensee=Naval Sea Systems Command/9991451100, User=Fletcher, Steve Not for Resale, 11/28/2016 13:02:01 MST US00006315 MIL-F-23905B(AS) TABLE I (Continued) CHEMICAL AND PHYSICAL REQUIREMENTS Requirement__________________________ Limits/Value______Test Paragraph Nitrogen Content, percent Color Identification, maximum Foamability : Expansion, minimum Drainage time, mimimum minutes 0.30 - 0.40 light amber 7. 2. 5 4.5.6 visual 4.5.7 4.5.7 4. QUALITY ASSURANCE PROVISIONS i 4.1 Responsibility for inspection - Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except ais otherwise specified, the supplier may utilize his own or any other inspection facilities and services acceptable to the Government. The Government reserves the right to perform any of the inspections set forth in the specifications where such inspections are deemed necessary to assure that supplies and services conform to prescribed requirements. 4.2 Classification of inspection - The inspection of the fire extinguishing agent shall be classified as follows: Ca) Preproduction Inspection (4.3) (b) Quality Conformance Inspection (4.4) 4.3 Preproduction inspection - Preproduction inspection shall consist of all the inspection of this specification. 4.3.1 Sampling for preproduction inspection - 4.3.1.1 Unless otherwise specified, as soon as practicable after award of a contract or order, the contractor shall furnish preproduction samples for inspection to determine conformance with this specification. Quantity production shall be withheld until the preproduction sample has been pronounced satisfactory by the Government. When a contractor is in continuous production of these items from contract to contract, sub mission of further preproduction samples may be waived at the discretion of the Contracting Officer. The approval of preproduction samples or the waiving of the preproduction inspection shall not relieve the con tractor of his obligation to submit samples for quality conformance inspection. 4 Copyright Naval Air Systems Command Provided by IHS No reproduction or networking permitted without license from IHS Licensee=Naval Sea Systems Command/9991451100, User= Fletcher, Steve Not for Resale, 11/28/2016 13:02:01 MST US00006316 MIL-F-23905BA S ) 4.3.1.2 The preproduction sample shall consist of 5-gallons of the material furnished in a sealed container. The sample shall be in spected as specified herein and in accordance with the contract or order. Each sample shall be accompanied by the results of all specification tests (see 6.2). 4.4 Quality conformance inspection - Quality conformance in spection shall consist of all the tests of this specification as de scribed under "Test Methods" (4.5), and the examination of filled con tainers (4.4.2). 4.4.1 Sampling - 4.4.1.1 Inspection Lot - All material manufactured as one batch and offered for delivery at one time shall be considered a lot for pur poses of quality conformance inspection. 4.4.1.2 Lot acceptance test samples - From each lot of material offered for acceptance under contract, four filled 5-gallon containers shall be selected at random. A composite sample, sufficient in size for test purposes, shall be made up by drawing equal portions from the con tainers and immediately placed in a dry, air and water tight container and forwarded to a testing laboratory satisfactory to the procuring agency. The composite sample shall be subjected to all the tests as described under "Test Methods". (4.5). 4.4.2 Examination of filled containers - A random sample of filled containers shall be selected from each lot in accordance with MIL-STD-105 at inspection level I, and acceptable quality level (AQL) equal to 2.5 percent defective to verify compliance with all stipulations of this specification regarding fill, closure, packaging, packing, mark ing and other requirements not involving tests. Containers shall be ex amined for defects of the container and the closure, for evidence of leakage, and for unsatisfactory markings; each sample filled container shall also be weighed to determine the amount of the contents. Any con tainer in the sample having one or more defects or under required fill shall be rejected, and if the number of defective containers in any sam ple exceeds the acceptance number for the appropriate sampling plan of MIL-STD-105, the lot represented by the sample shall be rejected. 4.5 Test Methods - 4.5..1 Specific Gravity - The specific gravity of the liquid concentrate shall be determined in accordance with ASTM Method D-1298-55. 5 Copyright Naval Air Systems Command Provided by IHS No reproduction or networking permitted without license from IHS Licensee=Naval Sea Systems Command/9991451100, User=Fletcher, Steve Not for Resale, 11/28/2016 13:02:01 MST US00006317 MIL-F-23905B(AS) 4.5.2 Viscosity - The viscosity of the liquid concentrate shall be determined in accordance with ASTM Method D-445-61 using a capillary viscometer of appropriate size number at 25C. (77 1F.) and at 4.4C. (40 1F.). 4.5.3 Refractive Index - An Abbe refractometer shall be used to determine the refractive index of the sample. Standard testing pro cedures for this instrument shall apply. 4.5.4 pH Value - The pH value of the liquid concentrate shall be determined potentiometrically, using a pH meter equipped with a glass electrode and a suitable reference electrode. 4.5.5 Surface tension - The surface tension of a solution of lcc of the liquid concentrate in 370cc of distilled water shall be de termined in a Cenco DuNuoy tensiometer in accordance with ASTM Method 1331-56 and until the readings come to an equilibrium (approximately 30 minutes). 4.5.6 Nitrogen Content - A modified sealed tube Kjeldahl di gestion and titration method shall be used to determine the nitrogen con tent of the liquid concentrate. (Reference Analytical Chemistry, Volume 23, pp 363, 1951). 4.5.7 Foamability - An Ansul Company (Marinette, Wisconsin) por table extinguisher, Model WF-2-1/2, (or similar) of the stored pressure type is modified for this test. The discharge hose and nozzle are re placed by the following assembly in 1/4" pipe size: A nipple 2-1/2" in length, a tee fitted with a calibrated 200 psi gage, a 1/4" to 3/4" bush ing, and finally a special foam-producing nozzle. This air-aspirating nozzle (or similar), available as a laboratory testing item from National Foam System, Inc., West Chester, Pennsylvania, should have a flow rated at 2.00 gpm .10 gpm at 100 psig delivery pressure. First, in the procedure to test foam concentrates for expansion and drainage, the extinguisher container is charged with one gallon of pre mixed solution at 70F. in the required quantities. The discharge assembly is then coupled to the extinguisher. Using compressed air or nitrogen, the unit is pressurized to 110 psig. The unit is held with the nozzle 3 ft. from the ground and at a dis tance of 10 ft. from a foam collecting board. The latter is constructed at an angle of 45 to the horizontal and has a V-shaped trough to direct the run-off foam into a standard 1-liter glass graduate centered below tie_trough exit. 6 Copyright Naval Air Systems Command Provided by IHS No reproduction or networking permitted without license from IHS Licensee=Naval Sea Systems Command/9991451100, User=Fletcher, Steve Not for Resale, 11/28/2016 13:02:01 MST US00006318 MIL-F-23905B(AS) The discharge valve is depressed and the foam stream directed to one side of the collector. When the installed discharge gage registers 105 psi the foam stream is directed to impinge on the stand backboard at its center point. Discharge is continued in this manner until the foam fills the cylinder. The protruding top of the foam column in the gra duate is then struck off level and a stopwatch is started. The expansion value is defined as the ratio of the final foam vol ume to original foam solution volume before air addition. The foam filled graduate is weighed to the nearest gram and the expansion cal culated from the following expression. Expansion ______(graduate total volume in ml.)_____ (Full weight minus empty weight in grams) At one minute intervals from the stopwatch starting point, the total volume; of solution drained from the foam column is recorded- Sufficient readings should be taken to insure that more than one-fourth of the solution in the foam sample has drained. The 25% drainage volume is calculated from: 25% Volume weight minus empty weight in grams) 4 The time required to collect this drainage volume shall be reported as the 25% drainage time. Tnis test shall be run three times on the one gallon charge. Repres surize unit'each time to 110 psi. The reported expansion and drainage time values will be averages of the three tests. 4.5.8 Film formation and sealability - The objective is to test the ability of a fire-extinguishing agent of the foam-forming type to develop a vapor-sealing film on a hydrocarbon fuel surface. As the foam drains, a small percentage of the liquid drop-out remains surface-borne and spreads to provide protection against reignition of exposed fuel. A stainless steel Graduated Measure of 1,000 ml capacity (4-1/2" dia., 5" deep) (Cole-Parmer Co., Chicago Illinois, or similar) is fitted at the top edge with two small metal clips protruding 1/8" into the opening. They serve to restrain an 80 mesh conical screen of stainless steel (5" in height by 4-3/4" in diameter) from floating out of the container during the test'. A Waring Automatic Blender, or similar, is used as the test foam maker, (at 70 5F.). Copyright Naval Air Systems Command Provided by IHS No reproduction or networking permitted without license from IHS 7 Licensee=Naval Sea Systems Command/9991451100, User=Fletcher, Steve Not for Resale, 11/28/2016 13:02:01 MST US00006319 MIL-F-23905B(AS) First, 600 ml of 98% cyclohexane are placed into the Graduated Measure. 100 ml of the active solution to be tested are formed for 10 seconds at low speed in the Blender. 200 ml of this foam are poured onto the fuel surface. The screen is then inserted into the Measure and clipped firmly into place, and a stopwatch is started. A small portion of foam bubbles will be forced through the screen mesh but the dominant surface area will appear bare. After one minute elapsed time, a small flame is passed six times around the fuel surface at an exact height of 1/2" ( 1/8"). A small flash may occur but no sustained ignition should result if an effective vapor-seal is present. This flame can readily be provided using a hand held propane tank fitted with a capillary tubing outlet and adjusted with the valve to give about a 1" long pilot flame. 4.6 Rejection criteria - When any lot acceptance test sample fails to meet any of the test requirements of this specification or when the number of defective filled containers exceeds the acceptance number as specified in 4.4.2, the lot represented by the sample shall be rejected. 5. PREPARATION FOR DELIVERY 5.1 P reservation and packaging - 5.1.1 Level A - 5.1.1.1 applicable. Cleaning, drying and preservative application - Not 5.1.1.2 Unit packaging - Unit packaging of the liquid concentrate fire extinguishing agent shall be furnished in 5-gallon containers in accordance with specification PPP-P-704A, Type 1, Class 1 except that the interior coating shall be a uniform double coating of Bradley-Vrooman Series 46, epon-phenolic resin. The closure shall be a snap-on cap type with a protective metal band as described in paragraph 3.3 of PPP-P-7G4A. 5.1.2 Level B -Not applicable. 5.1.3 Level C - 5.1.3.1 Unit packaging - Unit packaging of the liquid concentrate fire extinguishing agent shall be in accordance with 5.1.1.2. 8 Copyright Naval Air Systems Command Provided by IHS No reproduction or networking permitted without license from IHS Licensee=Naval Sea Systems Command/9991451100, User= Fletcher, Steve Not for Resale, 11/28/2016 13:02:01 MST US00006320 MIL-F-23905BAS) 5.2 Packing - 5.2.1 Level A - 5.2.1.1 Exterior Containers - Unless otherwise specified, material packaged in accordance with 5.1.1.2 shall be shipped without exterior packing. When specified by the procuring activity, pails shall be packed in wood boxes in accordance with specification PPP-B-601, overseas type, or PPP-B-621, Class 2 (weight limit not to exceed 200 lbs) or palletized in accordance with Specification MIL-STD-147, load type III. 5.2.2 Level B - Not applicable. 5.2.3 Level C - The liquid concentrate fire extinguishing agent packaged in accordance with 5.1.3.1 shall be packed to afford protection against damage during shipment from the supply source to the first re ceiving activity for immediate use. Containers shall comply with Con solidated Freight Classification Rules or other common carrier regulations applicable to the mode of transportation. 5.3 Marking - 5.3.1 Special Markings - Two identical instructions for use and caution label markings as listed below shall be applied to each container so that the markings are located diametrically opposite on the container side. The labels shall be applied in such a manner that water immersion of the container, or normal handling will not impair the legibility of the marking. instructions for use: Fire extinguishing agent '*Light Water" liquid concentrate is a non-toxic, non-corrosive, fluorocarbon surfactant mix ture for use in specially designed equipment which generates "Light Water" (Lt H2O) foam for firefighting purposes in foam-forming devices or in conjunction with "twinned" potassium bicarbonate dry chemical equipment. Thi$ concentrate is to be diluted for use with clean fresh water in vol ume proportions of 6 gallons concentrate to 94 gallons water. This may be done by premix in the final storage container or by suitably designed flow proportioning equipment. Caution: Do not store below 32F. (0C) for ready use. Do not mix with, any other liquids except as noted in the instructions for use. 5.3.2 Normal markings - In addition to the markings required by contract or order, unit packages, and shipping containers shall be marked in accordance with the requirement of MJ.L-STD-129. Copyright Naval Air Systems Command Provided by IHS No reproduction or networking permitted without license from IHS Licensee=Naval Sea Systems Command/9991451100, User= Fletcher, Steve Not for Resale, 11/28/2016 13:02:01 MST 9 US00006321 MIL-F-23905B(AS) 6. NOTES 6.1 Intended use - Foams produced from "Light Water" diluted concentrates are intended for use as fire extinguishing agents or in con junction with dry chemical extinguishing type agents for the purpose of eliminating flashbacks and preventing reignition of flammable hydrocarbon fuels. 6.2 following: Ordering data - Procurement documents should specify the a. Title, number and date of this specification b. Quantity c. Level of packaging and packing required (see 5.1 and 5.2) d. Whether preproduction inspection is required (see 4.3.1.1) e. Where preproduction inspection is to be conducted when required (see 4.3.1.2). U.S. GOVERNMENT PRINTING OFFICE: 1967-251-519/6343 10 Copyright Naval Air Systems Command Provided by IHS ! No reproduction or'networking permitted without license from IHS Licensee=Naval Sea Systems Command/9991451100, User= Fletcher, Steve Not for Resale, 11/28/2016 13:02:01 MST US00006322