NAVY MIL-W-181 A-1975 WAX (CANDELILLA)《蜡大戟蜡》.pdf

1、 - MIL-U-LBLA 71 M 7777706 0076003 7 M H-IS.725 MIL- W- 18 lA(0S) 18 August 1975 SUPERSEDING 31 January 1945 JAN-W- 181 MILITARY SPECIFICATION WAX, CANDELILLA 2“s specification is approved for use by all departments and agencies of the Department of Defense. 1. SCOPE I 1.1 This specification covers

2、one grade of candelilla wax. 1 2, APPLICABLE DOCUMENTS *2.1 The following documents of the issues in effect on the date of invitation for bids or request for proposals form a part of this spec- ification to the extent specified herein. between this specification and other documents referenced herein

3、, requirements of this specification shall apply, In the event of conflict I STANDARDS Military . *MIL-STD-129 *(Copies of specifications, standards, and drawings required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by

4、the contracting of fi Cer, ) Marking for Shipment and Storage 3, REQUIREMENTS 3.1 Material and. workmanship, The wax shall be the naturally occurring extract, clear, and free from foreign matter, 3.2 Chemical and physical properties, Candelilla wax shall conform to the chemical and physical properti

5、es requirements specified in table I, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-LBLA 72 7779706 0076004 7 MIL-W- 1 SlA(0S) Table I CHEMICAL AND PHYSICAL PROPERTIES Property Volatile matter, % Solidification point, OC Percent insoluble in

6、carbon tetrachloride Acid number , Saponi f i cat i on numb er ,Mineral acidity Ash, % 4. QUALITY ASSURANCE PROVISIONS Min5mum - 63.0 - 45 ,O None (See 4.6.6) Maximum 1.5 70 ,O 1 ,o 22.0 65.0 None (See 4.6.6) 0.5 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purcha

7、se order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection require- ments specified herein, u

8、nless disapproved by the Government. 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 services conform to prescribed requirements, The 4.2 Size of lots. Unless otherwise specified in the

9、contract or purchase order, the maximum lot size shall be 10,000 pounds. *4.3 Sampling., A minimum of 10 percent of the containers in the lot shall be selected in such a manner as to be representative of the lot. When lots comprise less than 100 containers, either. 10 contaaers or all containers in

10、the lot shall be selected. Approximately.one-hal pound of the material shall be removed from each selected container. Each primary sample shall be labeled so that te container from wwch it was taken can be identified. until the material passes a U. S. Standard No. 4 (4,760 micron) sieve. An approxim

11、ately 1/2-pound composite sample shall be made of equal parts of each primary sample. All samples shall be placed in airtight containers and labeled to show the name of the material, manufacturer, contract or order number, lot number, and the number of pounds in .the lot. .me primary samples shall b

12、e held by the procuring activity for possible future The individual samples shall be pulverized Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. MIL-W-LLA 71 = 7777706 0096005 O - MI L-W- 181A (OS) -xamination should the “ests of the compos,te sampl

13、e Sibow that the lot fails to meet the requirements of this specificazion. tests shall be made on the composite sample representative of the test. All acceptance 4;4 Examination of product, The wax shall be visually.examined for conformance to the. requirements of 3.1. 4.5 Examination of preparation

14、 for- delivery. n examination shall be made to determine that the packaging, packing, and markings conform to the requirements of section 5. 4.6 Test methods. The following test methods shall be used to determine r. conformance to the requirements of .3,2. . 4.6.1 Volatile matter. Weigh approximatel

15、y 5 grams of the sample in Calculate the. loss of a tared glass-stoppered weighing bottle. 100“ to 105O C, cool in a desiccator, and weigh. weight tion used N = normality of NaOH solution W = weight of sample. “4.6.5 Saponification number. Transfer approximately 1.0 grams of the pulverized sample, w

16、eighed to the nearest 0,001 gram, to a 250-ml Erlenmeyer flask. solution into the flask containing the test sample. of the potassium hydroxide sglution to a 250-ml Erlenmeyer flask con- taining no sample for use as a blank. and reflux on a hot plate for 3 hours. Condensers, add 3 to 5 drops of pheno

17、lphthalein (1 gram in 100 ml of 95 percent ethanol) and titrate both sample and blank with 0.1 N hydrochloric acid until the pink.color just disappears and does not return for at least 10 seconds. separates on cooling, conduct the titration as near boiling as is feasible, Frequently swirl the conten

18、ts of .the flasks during titration. Measure 50 ml of 0.1 N alcoholic potassium hydroxide Add an equal amount Connect both flasks to condensers Remove the flasks from the If the solution congeals on cooling, or if soap (V-V)N X 56.1 W Saponification nher = where : V = ml acid required for blank v = m

19、l acid required for sample N = Normality of acid used W = weight of sample. i 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W- 181A(OS) 4.6.6 Mineral acidity. Place 5 grams of the finely dlvided sample in a 250-ml beaker, add 100 ml of cold d

20、istilled water, shake thoroughly, and filter through filter paper into a flask. with a small quantity-of distilled water, and filter into theflask containing the first filtrate. indicator solution to the filtrate and observe whether the solution gives an acidic reaction. Wash the beaker and sample A

21、dd 5 to 10 drops of methyl orange *4.6,7 Ash. gram, of approximately 5 to 10 grams in a previously ignited and weighed evaporating dish (if not,platinwn, porcelain is acceptable) over a free flame until the vapors ignite. volatile combustible matter has been removed and the sample is charred. Transf

22、er the dish and contents to a muffle furnace and ignite to constant weight at 600 C. Allow to cool in a desiccator and weigh. Calculate the increase in weight as percentage of ashin the sample. Heat a weighed sample, accurate to the nearest 0.01 - Avoid loss by spattering until all 4.6.8 Retests, If

23、 the official sample, representative of the lot, fails to meet the test prescribed in this specf?cation, the manufacturer shall have the option of having analyses and tests made of ea& primary sample at his own expense. The manufacturer may then remove or replace defective portions of the lot repres

24、ented by the primary samples which fail to meet the requirements and silhmLt-.the. lot for acceptance, provided the markings on the container are s.u& that complete removal or replacement of the defectiveportons of the lot can be made to the satisfaction of the procuring actiyity, 5. PREPARATION FOR

25、 DELIVERY 5.1 Packin Unless othenaise specified, ,candelflla- wax shall be packed + in su stantial comercial containers so constructed as to insure acceptance and safe delivery by common or other carr.er at the lowest rate to the point of delivery, 5.2 Marking. In addition toany special marking requ

26、ired hy the contract or purchase .order, shipping containers shallbe marked in accordance with MIL-STD-129, 6. NOTES 6.1 Intendedtiss. Candelilla wax cc intended for use in explosives. 6 A rered 6 this specification is Provided by IHSNot for ResaleNo reproduction or networking permitted without lice

27、nse from IHS-,-,-. MIL-W- 181A(OS) 6.2. Ordering use. Procurement. documents should specify the following : a. Title,number, and date of this specification b. Size of lot if other than 4.2 c. Special marking if required (see 5.2). *6.3 The margins f this specification-are marked with asterisks to in

28、dicate where changes (additions, modifications, corrections, deletions) from the previous issue were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations, the requirements of this document based on the entire content irr

29、e- spective of the marginal notationS.and relationship to the last previous issue. Bidders -and contractors are cautioned to evaluate , - Cu todain : Navy - OS. Preparing Activity: (Project No. 9160-NO56 Navy - OS &VA DOVERNYENT PRRppING OFFICE: 1975-609-766/930 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-