1、MIL-L-20213D(SHIPS) 11 December 1959 (See 6.6) MILITARY SPECIFICATION LITHIUM HYDROXIDE (LiOH), TECHNICAL This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. I. SCOPE 1
2、.1 Scope. This specification covers lithium hydroxide, for use in removal of carbon doxide from air in submarines. 2. APPLICABLE DOCUMENTS 2.1 Issues of documents. The following documents, of the issue in effect on date of invitation for bids or request for proposal, form a part of this specificatio
3、n to the extent specified herein. SPECIFICATIONS FEDERAL RR-S-366 - Sieve Test. PPP-B-576 - Box, Wood, Cleated, Veneer, Paper Overlaid. PPP-B-585 - Boxes; Wood, Wirebound. PPP-B-591 - Boxes, Fiberboard, Wood-Cleated. PPP-B-601 - Boxes, Wood, Cleated-Plywood. PPP-8-621 - Boxes, Wood , Nailed and Lock
4、-Corner. PPP-B-636 - Boxes, Shipping, Fiberboard. MILITARY MIL-L-10547 - Liners, Case, And Sheet, Overwrap; Water- MIL-C-21004 - Canister, Lithium Hydroxide, Screened Ends, Vaporproof Or Waterproof, Flexible. Friction Type Covers. Beneficial comments (recommendations, additions, deletions) and any p
5、er- tinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 31 12, Depart- Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. ment of the Navy, Washington, DC 20362 by u
6、sing the self-addressed -. FSC 6810 Licensed by Information Handling ServicesProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STA NDA RDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection MIL-STD-129 - Marking for Shipment and Stora
7、ge. by Attributes. (Copies of specifications, standards, drawings, and publications re- quired by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer .I 2.2 Other publications, The following document
8、s form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) CI36 - Rotap Sieve Test. (Application for copies should be address
9、ed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) UMIFORM CLASSIFICATION COMMITTEE, AGENT Uniform Freight Classification Ratings, Rules and Regula- tions (Application for copies should be addressed to the Uniform Classifica- tion Committee Agent, Tariff
10、 Publication Officer, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606,) 3. REQUIREMENTS 3.1 Qualification. The lithium hydroxide furnished under this specification shall be products which are listed, or are qualified for listing on the applicable qualified products list at the time set for o
11、pening of bids (see 4.3 and 6.3). 3.2 Materials. The lithium hydroxide shall be manufactured from 3.2. I Recovered materials. Unless otherwise specified herein, all equipment, material, and articles incorporated in the products covered by this specification shall be new and shall be fabricated using
12、 materials produced from recovered materials to the maximum extent practicable without jeopardizing the intended use, The term “recovered materialsll means materials which have been collected or recovered from solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw
13、materials. None of the above shall be interpreted to mean that the use of used or rebuilt products is allowed under this specification unless otherwise specifically specified 3.3 Solubility. Lithium hydroxide shall be completely soluble, giving a clear colorless solution without any sediment when te
14、sted as spe- cified in 4.6.2. 1 i thi um h yd rox id e monohydrate . - 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-202L3E 68 W 7777906 0117476 3 W MIL-L-20213E (SHI 3.4 Apparent density. The apparent density of the lithium hydroxide shall
15、 be not less than 0.38 gram per milliliter (g/mL) when tested as spe- * cified in 4.6.3. 3.5 Particle size. Lithium hydroxide shall -conform to the sieve sizes shown in table I when tested as specified in 4.6.4. TABLE I. Particle size. Sieve number -“ 4 6 8 14 16 120 Pan -I -_-_- Percentage mater ia
16、1 retained by weight .-_- o to 5 25 to 70 20 to 65 5 to 45 o to 3 o to 1.5 o to 0.5 ._-_II_. 3.6 Hardness. Lithium hydroxide shall be not less than No. 95 hard- ness and the amount retained on the No. 14 screen at the end of the test shall be not less than 45 g when tested as specified in 4.6.5. 3.7
17、 Absorption. Initial breakthrough of detectable carbon dioxide in sample effluent must not occur for a minimum of 30 minutes when tested as specified in 4.6.6. The absorption of carbon dioxide shall be not less than 0.70 g of carbon dioxide per gram of lithium hydroxide at an absorp- tion efficiency
18、 of 50 percent determined as specified in 4.6.6. 3.8 Chemical composition, The following parameters shall be tested as specified in 4.6.7. 3.8.1 Lithium hydroxide. The lithium hydroxide (LIOH) content shall be not less than 97.6 percent by weight, 3.8.2 Moisture content. The moisture content shall n
19、ot exceed 0.50 percent by weight. - 3.8.3 The constituents shall not exceed the limits listed in table II as specified. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-M IL-L-2 02 1 3E (SH 1 TABLE II. Chemical composition. ll_-l- permissible Con st
20、 i tuent Sulphates and carbonates (calculated as Li2SO4 or 1.94 (total) Heavy metals Chlorides (see 4.6.7.6) Sodium and potassium 0.20 (total) 4, QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection, Unless otherwise specified in the contract, the contractor is responsible for the performa
21、nce of all inspection requirements as specified herein, Except as otherwise specified in the contract, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified here- in, unless disapproved by the Government, The Government reserves
22、the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: (a) Qu
23、alification inspection (see 4.3). (b) Quality conformance inspection (see 4.4). 4.3 Qualification tests, Qualification tests shall be conducted at a laboratory satisfactory to the Naval Sea Systems Command. Qualifica- tion tests shall consist of the tests specified in 4.6. 4.4 Quality conformance te
24、sts. Each sample specimen selected in accordance with 4,4.1,3, shall be subjected separately to the tests speci- fied in 4.6.2, 4.6.4, 4.6.5, 4.6.6, and 4.6.7.2. If any sample specimen fails, this shall be cause for rejection of the entire lot. - 4.4.1 Sampling for quality conformance. 4.4.1.1 E. Fo
25、r purposes of sampling, a lot shall consist of all lithium hydroxide prepared from one batch of raw material without any change in the processing procedure and presented for acceptance inspection at one time, 4.4.1.2 Sampling for examination of filled containers. A random sample of filled containers
26、 shall be selected from each lot offered for examintation in accordance with MIL-STD-105 at inspection level I, and 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-20213E (SH) acceptable quality level (AQL) = 2.5 percent defective to verify c
27、ompliance with all stipulations of this specification regarding fill, closure, marking and other requirements not involving tests. 4.4.1.3 Sampling for tests. .From each lot, two containers shall be selected. From each of the two containers, a 2-pound (lb) specimen shall be aken and pIaced in a sepa
28、rate, clean, dry, container. The sample container shall have an airtight closure and be labeled in a manner to identify the lot represented. Each container specimen shall be subjecte to the tests as specified in 4.6 and the balance of the sample shall be reserved for possible retest until the lot ha
29、s been accepted by the govern- ment. 4.5 Examination of filled containers. Each of the sample filled containers selected in accordance with 4.4.1.2 shall be examined for defects of the container and the closure for evidence of leakage, and for satisfactory markings. Each sample filled- container sha
30、ll be weighed to determine the amount of contenfs. Any container in the sample having one or more defects or under the required fill (see 5.1) shall be cause for rejection. If the number of defective containers in any sample exceeds the acceptance number for the appropriate sampling plan of MIL-STD-
31、105, this shall be cause for rejection of the lot represented by the sample. 4.6 Inspection test procedures. 4.6.1 Preparation of specimen. Caution is required in handling lithium hydroxide to prevent unnecessary exposure to the air owing to its moisture and carbon dioxide content. Approximately 1 l
32、b of each sample specified in 4.4.1.3 shall be put in a wide-mouth glass bottle of sufficient size to permit homogeneous distribution, The bottle shall be stoppered or sealed to prevent access of air, and shall be rolled or shaken until the particle size distribution of the specimen appears to be ho
33、mo- genous. The balance of the samples shall be held for duplicating the tests, if necessary. 4.6.2 Solubility. Approximately 10 g (plus or minus 0.1 g) of the prepared specimen (see 4.6.1) shall be placed in a tared weighing bottle with cover and weighed to an accuracy of the nearest milligram. The
34、 weighed specimen shall be added to a 1,000 mL flask, dissolved at room temperature in distilled water free from chlorine and diluted to exactly 1,000 mL. The entire sample shall dissolve without any remaining sediment to a clear colorless solution. 4.6.3 Apparent density. From the specimen (see 4.6
35、,1), a weighed - quantity of approximately 50 g shall be transferred to a clean, dry 500 mL graduated glass cylinder. The cylinder shall be inclined and rotated until the entire sample flows freely; care shall be taken to avoid any loss. Thereafter, the surface of the sample shall be leveled by tipp
36、ing the graduated cylinder slightly forward and backward, while held vertically, without tapping or jarring. The volume occupied by the LiOH will be deter- mined in mL. The ratio of weight (in gram) to the volume (in mL) so deter- mined will be reported as “Apparent Density“ (see 3.4). e 5 Provided
37、by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-M IL-L-2 02 1 3E (SH 4.6.4 Sieve test. Sieve tests shall be made by screening 200 g of material, taken from the specimen (see 4.6.11, for 5 minutes on a Rotap machine, conforming to ASTM C 136 run at the rate of
38、 1750 revolutions per minute (r/min) of the driving shaft. The sieves used shall be No. 4, 61 8, 14, 16 and 120. The sieves shall conform to RR-S-366. The amount held on each sieve shall be in accordance with table I. 4.6.5 Hardness. The hardness number shall be determined by taking approximately 10
39、0 g of the specimen (see 4.6.1) and screening as specified in 46.4 using only the No. 4 and No. 14 sieves. Approximately 50 g of the material which passes through the No. 4 sieve and remains on the No. 14 sieve shall be taken, weighed to 0.1 g accurately and placed in an 8-inch pan with a concave bo
40、ttom 5/16 inch thick at the rim and 3/16 inch thick at the center. Fifteen steel ball bearings of 5/16 inch diameter shall be placed in the pan and shaken for 30 minutes with a Rotap sieving machine running at a rate of 1750 r/min of the driving shaft. The contents of the pan shall then be brushed o
41、nto an assembly, comprised of a NO. 14 sieve, a No. 30 sieve, and a pan, and shaken for 3 minutes on the Rotap sieving machine, The weight of material retained on each screen shall be recorded and the sum of the weights retained on the screens, multiplied by two, shall be the hardness number (see 3.
42、6). mined by transferring LiOH from the specimen (see 4.6.1) to a weighted absorption tube approximately 3 centimeters (cm) in diameter to a (pre- determined) 15.0 cm depth, The absorption tube with the lithium hydroxide (test bed) shall be weighed, and the weight of the lithium hydroxide deter- min
43、ed by difference. An air stream at approximately 20 celcius (Cl con- taining 4 percent *, 0.1 percent carbon dioxide, by volume, and water vapor equivalent to an approximate relative humidity of 85 percent at 2OoC, shall be passed vertically from bottom to top through the lithium hydroxide at a velo
44、city of 500 cm per minute, that is, 500 cc/min/sq cm cross-sectional area of absorption tube (approximately 3.5 L/min). The air and carbon dioxide shall be passed through the lithium hydroxide until the effluent air contains one-half the carbon dioxide concentration of the influent air. The 50 perce
45、nt concentration point shall be determined from examina- tion of a continuous time versus efficiency curve obtained by monitoring 4.6.6 Absorption. The absorption of carbon dioxide shall be deter- through point shall be determined by readings of 0.1% CO2 f 0.01% CO2 as read on the time versus concen
46、tration curve. The CO2 concentration of the effluent air stream shall be continuously recorded, using an appropri- ate strip chart recorder, The effluent absorption chart shall be retained for two years and made available to the Naval Sea Systems Command upon request, The amount of carbon dioxide (C
47、OZ) absorbed to the 50 percent efficiency point specified in 3.7 is to be determined from equation (1). The initial gram equivalent of LiOH is derived from equation (2). The value (.976) in equation (2) corresponds to LiOH purity specified in 4.6.7.1. After the 50 percent efficiency level is reached
48、, reweigh the test bed. Then thoroughly mix test bed and extract a 10 g representative sample and dissolve it volumetrically in I-liter of distilled water per 4.6.2 . A 100 mL Aliquot of this solution is then transferred to a 250 mL flask. A neutral 10 percent Bac12 solution is slowly added until th
49、e white precipitate BaCO3 is no longer formed. Two drops of phenolphthalein indi- cator are added and the solution immediately titrated with N-hydrochloric acid of a known normality. To avoid contamination of the sample by atmos- pheri-c COS, this analysis must be completed as soon as possible. After 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-202L3E 68 9979906 OLL7480 5 U MI
