1、MIL-F-81265 (b) 17 May 1965 MILITARY SPECIFICATION FIBER, ASBESTOS This specification has been approved by the Bureau of Naval Weapons, Department of the Navy. 1. SCOPE 1.1 Scope. This specification covers the requirements of one type of Chrysotile asbestos. 2. APPLICABLE DOCUMENTS 2.1 The following
2、 documents, of the issue in effect on date of invi- tation for bids or request for proposal, form a part of this specification to the extent specified herein. SPECIFICATIONS Federal RR-S- 366 Military MIL-P- 116 Sieves, Standard, For Testing Purposes Preservation, Methods of STANDARDS Military MIL-S
3、TD-I29 Marking for Shipment and Storage (When requesting any o, the above documents, give the title and complete designation of the item shown above. Copies of this specification and other unclassified specifications, standards and publications required by con- tractors in connection with specific p
4、rocurement functions may be obtained from the Commanding Officer, Navy Supply Depot (CDS), 5801 Tabor Avenue, Philadelphia, Pennsylvania, 19 12 O. ) 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue
5、 in effect on date of invitation for bids or request for proposal shall apply Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F- 81265 (WP) PUBLICATIONS American Societv for Testing. and Materials ASTMD 153-54 ASTM D 299-60 Methods of Tests For S
6、pecific Gravity of Pigments Standard Specifications and Methods of Test For Asbestos Yarn (Application for copies should be addressed to the American Society for Testing and Materials, 19 16 Race Street, Philadelphia, Pennsylvania, 19 103 .) Quebec Asbestos Mining. Association Quebec Standard Classi
7、fication System (Application for copies should be addressed to Quebec Asbestos Mining Association, Quebec, Canada.) 3. REQUIREMENTS 3.1 Preproduction samples. Unless otherwise specified in the contract or order, preproduction samples of the asbestos fiber shall be manufactured using the methods and
8、procedures proposed for the production. The sample shall be tested as specified in Section 4 herein and is for the purpose of determining that, prior to starting production, the contractors production methods are capable of yielding items that comply with the technical require- ments of the contract
9、. After satisfactorily passing all the preproduction tests specified herein, no changes in, raw materials and processing of materials for production shall be made without prior written approval of the procuring activity . 3.2 Data requirements. No data is required by this specification or by applica
10、ble documents referenced in Section 2 unless specified in the contract or order (see 6.2). 3.3 Material. The material shall be a Chrysotile asbestos conforming to group 7, grade 7TF1, in accordance with Quebec Standard Classification System for Chrysotile Asbestos, Quebec Asbestos Mining Association
11、. 3.4 Physical and chemical properties. The physical and chemical properties shall be as specified in Table I. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-81265 53 7777706 011011Li O I- MIL- F- $1265 (tP) Table I. Physical and Chemical Prop
12、erties Property Surface Moisture Asbestos Content Apparent Density Grit Content Particle Size, -through U.S. No. 20 Sieve U.S, No. 100 Sieve Weight Percent Minimum Maximum - 3.0 80 - 5.0 - 2.10 2.80 99 16 3.5 Workmanship. The material shall be uniform in quality and shall be free from impurities and
13、 other defects that could adversely affect its use. 4. QUALITY ASSURANCE PROVISIONS 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 as otherwise
14、 specified, the supplier may utilize his own facilities or any commercial laboratory acceptable to the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and Bervices conform to
15、 prescribed requirements. 4.2 Classification of inspections. Inspection of the Chrysotile asbestos shall be classified as follows: a. Preproduction inspection (see 4.4) b. Quality conformance inspection (see 4.5) 4.3 Sampling 4.3.1 Preproduction sample. A preproduction sample of sufficient quantity
16、of the Chrysotile asbestos manufactured in accordance with 3.1 shall be subjected to three each of the preproduction tests detailed in 4.4 at an activity designated by the procuring activity. Further production of Provided by IHSNot for ResaleNo reproduction or networking permitted without license f
17、rom IHS-,-,-MIL-F- 81265 (WP) the Chrysotile asbestos by the supplier, prior to the approval of the preproduction sample, shall be at the suppliers risk. 4.3.2 Quality conformance inspection sampling. Unless otherwise specified, sufficient material shall be taken from each lot to perform the tests a
18、s specified in 4.5. 4.3.3 Inspection lot. An inspection lot of Chrysotile asbestos shall be all the material offered for acceptance at one time, produced in a single manufacturing run under homogeneous conditions of manufacture. 4.4 Preproduction inspection. The preproduction sample shall satis- fac
19、torily pass the quality conformance inspections detailed in 4.5. 4.5 Quality conformance inspection 4.5.1 Visual examination. Each container in a lot shall be examined to determine conformance to 3.5 and Section 5. 4.5.2 Surface moisture test. Heat a clean 25 milliliter (mi) porcelain crucible with
20、lid at 800 f 50 degrees Centigrade (C) for 1 hour and allow to cool to room temperature in a desiccator. Weigh the crucible plus lid to the nearest 0.1 milligram (mg) and record the weight (C). Add about 5 grams of the composite sample to the crucible, reweigh to the nearest 0.1 mg and record the we
21、ight (A). Place the crucible containing the sample in a drying oven, remove the crucible lid, and heat for at least 3 hours at 105 f 5 degrees C. Replace the crucible lid, allow the crucible and contents to cool to room temperature in a desiccator, reweigh to the nearest 0.1 mg and record the weight
22、 (B). Calculate the surface moisture as follows: Percent surface water = where: A - A-c x 100 A = Weight of crucible plus sample before heating, grams B = Weight of crucible plus dried sample, grams C = Weight of empty crucible, grams Save this sample for further use in paragraph 4.5.3. Provided by
23、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-until the beaker and residue are thoroughly dried. Brush the residue from the beaker into a tared weighing dish. Wei
24、gh the residue to the nearest 0.01 gram using an analytical balance and record this weight (A). Calculate the weight percent of grit in the sample as follows: Weight percent of grit = - A x 100 where: B A = Weight of grit, grams B = Original weight of sample, grams 4.5.6 Particle size test. The part
25、icle size of the composite sample shall be determined as follows: Procedur e Divide not less than 500 grams of the composite sample in a Riffle sampler. Discard the material in the left-hand pan. Again sample, dis- carding the material in the right-hand pan. From the left-hand pan, weigh 100 grams o
26、f the sample to the nearest 0.1 gram on a torsion balance and record this weight (B). Nest a U.S. No. 20 sieve above a U.S. No. 100 sieve in a sieve shaker using sieves in accordance with RR-S-366. Place the weighed sample in the No. 20 sieve, and cover this sieve with a cover plate. Allow the sieve
27、 shaker to vibrate for 13 rt 1 minutes. Transfer the contents of each sieve to tared weighing dishes, weigh to the nearest 0.1 gram on a torsion balance, and record the weights (A). Calculate the amount of material per sieve as follows: Weight percent of sample - A B retained by the sieve where: - A
28、 = Weight of material retained by sieve, grams B = Original weight of sample, grams 4.6 AcceDtance criteria 4.6.1 Preproduction. Failure of any sample to conform to any require- ment of this specification shall be cause for rejection of the sample. Provided by IHSNot for ResaleNo reproduction or net
29、working permitted without license from IHS-,-,-4.6.2 QuaIity conformance. Failure of any sample to meet any require- ment of this specification shall be cause for rejection of the lot. 5. PREPARATION FOR DELIVERY 5.1 Preservation, packaging and packing. Unless otherwise specified by the procuring ac
30、tivity, the preservation, packaging and packing shall be in accordance with MIL-P-116, method m. 5.2 Marking. Each container shall be marked in accordance with NIIL-STD-129. Marking shall include, but not be limited to, the following infor mation: a. Manufacturers name and location b. Material trade
31、 name c. Net weight or volume d. Lot number, batch number and date of manufacture e. Shelf life or storage limitations f. Number and revision letter of this specification 6. NOTES 6.1 Intended use. The material purchased in accordance with this specification is intended to be used as an ingredient i
32、n rocket motors. 6.2 Ordering data. Procurement documents should specify, but not be limited to, the following information: a. Title, number and revision letter of this specification b. Minimum lot size, if applicable c. Whether preproduction sample is required d. Place of delivery e. Size of container f. Request for test data 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
