1、MIL-P-387C - 8 December i976 SUPERSEDING MIL-P-00387B 7 November i967 AND MIL-P-387A 9 January 1957 (See 6.6) MILITARY SPECIFICATION / PENTAERYTHRITE TETRANITRATE (PETN) This spe-cification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Pentaerythrite
2、tetranitrate (PETN) covered by this speci- fication is a high explosive intended for use in ammunition (see 6.1). 1.2 Classification.-PETN shall be of the following classes as specified: Class 1 - For use in detonating cord Class 2 - For use in primers for small arms ammunition Class 3 - For use in
3、pentolite Class 4 - For use in blasting caps and detonators 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 RR-S-366 - Sieves,
4、Standasd for Testing Purposes . Y Beneficial commenta (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Picatinny Arsenal, Dover, New Jersey 07801 by using the self-addressed Standard- ization Document Imp
5、rovement Proposal (DD Form 1426) appearing at the end of this document or by letter. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-387C 13 9999706 0271013 T MIL-P- 387c STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspe
6、ction by Attributes MIL-STD-109 - Quality- Assurance Terms and DefinZtions MIL-STD-129 - Marking for Shipment and Storage MIL-STD-650 - Explosives: Sampling, Inspection and Testing NIL-STD-1168- Ammunition Lot Numbering MIL-STD-1235- Single and Multilevel Continuous Inspection by Attributes (Copies
7、of specifications, standards, drawings, and publications required by suppliers in connection with specific ppocurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 2.2 Publications.-The following documents fopm a part of this specificat.ion to
8、the extent specified herein, Unless other- wise indicated, the issue in effect on date of invitation for bids shall apply. AMERICAN SOCIETY FOR TESTING AND MATERIALS PUBLICATION I ASTM Procedures E300-73 - Recommended Practice for Sampling Industrial Chemicals (Application for copies of ASTM Standar
9、ds should be addressed to the American Society for Testing and Materials, i916 Race Street, Philadelphia, Pennsylvania, 19103). CODE OF FEDERAL REGULATIONS 49 CFR 100-199 - Department of Transportation Rules and Regulations for Transporation of Explosives and Other Dangerous Articles (The Department
10、 of Transportation Rules are a part of the Code of Federal Regulations available from the Superintendent of Docu- ments, Government Printing Office, Washington,D.C. 20402. Orders for the above publications should cite “49 CFR 100-199 (latest; revision)“). 2 Provided by IHSNot for ResaleNo reproducti
11、on or networking permitted without license from IHS-,-,-MIL-P-387C 13 9779706 027LOLi.I 1 MIL-P-387C 3. REQUIREMENTS 3.1 Melting Point.-The melting point of PETN shall be i41 degrees Centigrade (OC) plus or minus l.OC when determined as specified in 4.5.3. 3.2 Nitrogen Content.-The nitrogen content
12、of PETN shall be 17.50 percent minimum (min,) when determined as specified in 4.5.4. 3.3 Acetone insoluble material.-The acetone insoluble material I of PETN shall be 0.10 percent maximum (max.) when determined as specified in 4.5.5. particles in PETN when determined as specified in 4.5.5. shall not
13、 exceed 0.01 percent max. when determined as specified in 4.5.6. 3.6 12OOC vacuum stability.-The maximum amount of gas evolved in 20 hours test time when determined as specified in 4.5.7 shall be 5 milliliters (mi). 3.7 Granulation.-The PETN shall comply with the granulation requirements shown in Ta
14、ble I when tested as specified in 4.5.8, except that the granulation requirements for Class 3 PETN shall not apply to PETN used in co-precipitated pentolite. 3.4 Insoluble particles.-There shall be no evidence of insoluble 3.5 Acidity or Alkalinity (see 6.5).-The acidity or alkalinity TABLE I Granul
15、ation Requirements U.S. Standard Sieve No. 30 80 100 10 o 140 200 200 Percent Passing Specified Sieve Class 1 Class 2 Class 3 _- -_ - 95 min. 100 min. 85 min, 96. min. - 55 max. 30 max. 80 max, 30 max. I- 65 min. - - - - - - - -I - - 3 o Provided by IHSNot for ResaleNo reproduction or networking per
16、mitted without license from IHS-,-,-MIL-P-387C 13 7977706 027101r5 3 MIL-P-387 3.8 First article testing.-This specification makes provisions for first article testing. Submission of first article quantity by the contractor shall be as specified in the contract. 4. QUALITY ASSURANCE PROVISIONS 4.1 R
17、esponsibility 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 specified in the contract or order, the supplier may use his own or any other facilities
18、 suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. In addition 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 servi
19、ces conform to prescribed requirements. Reference shall be made to MIL-STD-109 in order to define the terms used herein. 4.2 Classification of Inspection.-The inspection requirements specified herein are classified as follows: a. First Article Inspection (see 4.3). b. Quality Conformance Inspection
20、(see 4.4) 4.3 First Article Inspection 4.3.1 Submission.-Prior to initiation of regular PrJduction the contractor shall submit a first article sample consisting of 2 lbs of PETN in accordance with instructions issued ty the Con- tracting Officer for evaluation in accordance with paragraph 4.3.2. All
21、 samples submitted shall have been produced by the contractor using the same production processes, procedures, and equipment as will be used in fulfilling the contract. All materials, including packaging and packing, shall be obtained from the same sources of supply as will be used in regular produc
22、tion, The sample shall be accompanied by certificates of analysis. A first article quantity, or portion thereof, as directed by the Contracting Officer, shall also be submitted whenever there is a lapse in production for a period in excess of 90 days, or whenever a change occurs in manu- facturing p
23、rocess, material used, drawing, specification or source of supply as to significantly affect product uniformity as deter- mined by %he Government. Prior to submission, the contractor shall inspect the sample to the degree necessary to assure that it conforms to the requirements .of the contract and
24、submit a record of this inspection with the sample. A sample containing known defects will not be submitted unless specifically authorized by the Contracting Offi Cer. 4 c Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-387C 13 m 9777906 027LOL
25、b 5 m MIL-P-387C 4.3.2 Inspections to be performed.-The sample will be sub- jected by the Government to any or all of the examinations or tests specified in 4.4 of 4.5 of this specification and any or all requirements of the applicable drawings. 4.3.3 Rejection.-If any sample fails to comply with an
26、y of the applicable requirements, the first article quantity shall be rejected. The Government reserves the right to terminate its inspection upon any failure of a sample to comply with any of the stated requirements. 4.4 Quality Conformance Inspection 4.4.1 Lot formation.-A lot shall consist of one
27、 or more batches of PETN produced by one manufacturer in accordance with the same specification or same specification revision under one continuous set of operating conditions. Each batch shall consist of that quantity of PETN that has been subjected to the same unit chemi- cal or physical mixing pr
28、ocess intended to make the final product homogeneous. The product shall be submitted for inspection in accordance with MIL-STD-105. The criteria and procedures for the assignment of lot numbers shall be in accordance with MIL-STD-1168. 4.4.2 Examination.-Sampling plans and procedures for the followi
29、ng classifications of defects shall be in accordance with MIL-STD-105. Contractors sampling plans, if used, shall be approved by the Government and shall provide, as a mini- mum, the protection afforded the Governmentby the sampling plans in MIL-STD-105. Continuous sampling plans in accordance with
30、MIL-STD-1235 may be used if approved by the procuring activity. Also, at the option of the procuring activity, AQLs and sampling plans may be applied to the individual characteristics listed, using an AQL of 0.40 percent for each Major defect and an AQL of 0.65 percent for each Minor defect. 4.4.2.1
31、 Container, prior to closing (see Seo. 5) Categories Defects Method of Inspection Critical: None defined. Ma j or : AQL 0.65 percent I 101. Bags not type required.,VisuaL 102. Container not type required.Visual 103. Wetting agent insufficient(see 5.1) 5 Provided by IHSNot for ResaleNo reproduction o
32、r networking permitted without license from IHS-,-,-mIL-P-347C 13 7977706 0271037 7 MI L- P- 3 8 7 C Minor: AQL 1.50 percent 201. 202. Contamination in containerVisual 203. Outer bags cut, punctured, torn 204. Cover gasket damaged Visual or have weak seams Visual/Manual Inner bags overweight Balance
33、 4.4.2,2 Container, closed (see Sec. 5) Categories Defects Method of Inspection Critical : None defined. Major: AQL 0.65 percent 101. Container not -securely closed . Visual/Manual 102. Container leaking .Visual 103. DOT Marking missing, illegible or incorrect. .,.Visual Minor : AQL 1.50 percent 201
34、. Container damaged or severely dented Visual Rust or corrosion on surfaces of container Visual . 202. Closing bolt improper . Visual 203. 204. Marking incorrect or illegible,.,.Visual 4.4.3 Sampling for test 4.5.3 through 4.5.8. Approximately 300 Samples shall be If any sample grams of the composit
35、ion shall be selected from each batch to be sampled using ASTM Procedures E300-73 for solids. selected for inspection in accordance with MIL-STD-1235, CSP-1 Plan, AQL 6.5 percent using a batch as a unit of product. fails to meet any requirement the batch represented by the sample shall be rejected.
36、All batches produced between the time that the batch was tested and accepted and the batch which failed shall be tested in accordance with the applicable methods given in paragraph 4.5. If any of these batches fail to meet any of the test requirements, that batch shall contractor will return to 100
37、percent inspection until iiiii successive batches are accepted as required by MIL-STD-1235. classification of defects shall be as given in Table II. also, be rejected. In addition, after any failure of a batch the The Y 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without l
38、icense from IHS-,-,-MIL-P-387C 33 999790b 0293038 7 TABLE II . CLASSIFICATION OF DEFECTS Property Type of Defect Melting Point Ma j or Nitrogen Content Ma3 or Acetone Insoluble Material Major Insoluble Partic les Maj or Acidity or Alkalinity Ma j or 12OOC Vacuum Stability Major Granulation Major Tes
39、t Paragraph 4*5.3 4.5.4 4.5.5 4.505 4.5.6 4,507 4,5.8 4.5 Test Methods and Procedures (see 6.3).-The tests in 4.5.3 through 4.5.8 shall be performed using prescribed analytical procedures for replicate determinations given in standard analytical textbooks. 4.5.1 Air dried sample.-The wet sample shal
40、l be air dried only if there is evidence of free liquid on top of the sample, The sample of wet PETN shall be mixed to insure uniform dstri- bution of the various size particles and then a portion of the sample consisting of approximately 120 grams (gm) of PET“ (dry basis) shall be transferred to a
41、Buchner funnel previously fitted with a Number 42 Whatman filter paper or equivalent. Air shall be drawn through the funnel and contents for approxi- mately 10 minutes. sheet of paper and mixec1 again with a wooden spatula to insure uniform moisture content. The PETN shall be transferred to a large
42、4.5.2 Oven dried and steam grid dried sample 4.5.2.1 Oven dried sample.-Approximately 1-2 gms of the PETN as received or air dried sample shall be transferred to a glass weighing dish. The dish and its contents shall be weighed and then dried in an oven at 43 t 2OC for 3 hours and then at looo t 2OC
43、 until constant weight is obtained. The dish and contents-shall be cooled in a desiccator. sample is to be used for the nitrogen content determination (see 4.5.4). This dried 4.5.2.2 Steam grid dried sample.-The remainder of the sample, appro.ximately 118 gms, shall be dried on a steam grid, Transfe
44、r the sample to a suitable glass container and weigh. Dry the sample in its container on the steam grid at 53 + 2OC in a well ventilated area for approximately 16 hours or longer until constant weight is obtained. The dried sample shall then be used for all tests except the nitrogen content deter- m
45、ination (see 4.5.2.1). P Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-387C 13 7977706 0271017 O W MIL-P-C 4.5.3 Melting point.-The melting point shall be determined as specified in MIL-STD-650, Method 209.1 with the exception of the followin
46、g paragraph: Apparatus.-The bath shall consist of a suitable beaker that 4.5.4 Nitrogen content.-The nitrogen-content shall be determined 4.5.5 Acetone insoluble material and insoluble particles.-A weighed portion of approximately 50 gm of the dried sample shall be placed in a beaker and dissolved i
47、n 500 mls, of acetone at room temperature. The solution shall be filtered through a tared filtering crucible, and the residue washed 3 times with acetone. The crucible shall be dried in an oven at 100 “11 2OC, cooled in a desiccator and weighed. The increase in weight shall be calculated as percenta
48、ge of insoluble material in the sample. The crucible shall be shaken over a U.S. Standard Sieve Number 40 to release any particles re- tained in the crucible. Count any particles that do not pass through the sieve. is about three-fourths full of an appropriate oil. as specified in MIL-STD-650, Metho
49、d 414.1 4.5.6 Acidity and Alkalinity 4.5.6.1 Acidity.-Weigh exactly log 2 0.01g of dried PETN and place it in a 500 ml extraction flask. Add 100 ml of ACS grade acetone measured in a 100 ml test tube. Shake by hand from time to time until the PETN is completely dissolved. Pour in slowly (20 to 30 seconds) 100 ml of distilled water measured in a 100 ml test tube and wait until the explosive settles (1 to 2 minutes).
