1、MIGC- 13882(0rd) 23 Bcember 1954- SPERSXDIaIG 49-42 25 August 1945 MILITAR SPECIFICATIQH CHARGE, EXPLOSIVE, SBaINGIG FOR ROD, EARTH, BLAST-DmvQT, Ml3 1. scorn 1.1 This specification covers one type of explosive eprhging charge for blast-driven earth rod MiJ. 2. APPLICABmD-S 2.1 The following specifi
2、cations, atanards, drawinge, and piiblicatione and all drawings and specifications referenced thereon, of the issue 5n effect on date of invitation for bids, form a part of tua apecifirac%ing officer.) 2.2 Other publications.-The following publications, of the issue in effect on date of invitation f
3、or bids, unless otherwise stated, form a part of this speeif ice tion: CODE OF“ FEDW REGLA!CIONS Title 49-Transportation:. Chapter I - Interetate Commerce Commission, Parts Ti .to 78 - Explosives and Other Dengeroue Articles. (Parts 71 to 78 of %tie 49 of the Code of Federal Regulations are containe
4、d in a volume which comprises parts 71 to 9 of that title. obtained upon application, accompanied by money order, coupon, or cash, to Superin- tendent of,Documents, Government Printing Office, Washington 25, D. C. Application should cite “49 CFR jl-9O“). I Copies of this volume may be 3. rnUIREMFN!J
5、S * 3.1 Material.-Tne material uaed in the manufacure of the springing charge Material shall be free from all defects and imperfections that might shall be as specified on the applicabe drawing. shall be of the best quality normaliy used for the purpose in good commercial practice. affect the servi
6、ceability of the finiehed product. Drawing P-86256 and on all drawings referenced thereon and with all requirements epecified in applicable specifications. B aha11 no% exten beyond the open end of the charge tube after the composition B has cooled and hardened. The weight of the composition I3 requi
7、red to fill each tube shall be not less than 26u grama when determined as specified in 4.5. All overflow. or drops of composition B shall be cleaned from the exterior surfaces of the finished charge. accordance with the best standard practice for this type commodicy. Material not definiteu specified
8、 3.2 The springing charge shall comply with all requirements specified on 3.3 Assembly and loading.-After filling the charge tube assembly, the composition 3.4 Workmanship.-Workmanship ahall be of the highest grade throughout and in ! 4. QALITY ASSURANCE lTlOV1SIONS 4.1 =.-A lot shall consist of spr
9、inging charges produced by one manufacturer 4.2 Sampliq.-Number of samples, acceptance, and rejection criteria used for 4.3 Inspection.-Inspection shall be as specified in Specification MILG-2550. 4.4 Determination of binder-lubricant content of booster-pellets 4.4.1 Stearic acid.-The outer surface
10、shall be removed from the sample hooster to obtain a composite sample of about 5 grama from the interior of the booster An accurately weighted portion of approximately 5 grame of the sample shall under one contract, in one unchanged process in accordance with the same drawing, same drawing revision,
11、 same specification and eame specification revision. accordance with Standard Inspection Procedure ORD-SIP-M16- 304. determination of lot acceptance for tests as specified herein shall be in pellete. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- 4
12、i. _- lZ(0rd) I be transferred to a tared, medium-porosity, sintered-glass crucible. The sample shall be extracted with three 20-ml portions of chloroform whish has been previously aaturated with RDX, maintaining each portion in eontact witn the residue for approxima:ely 5 minutes before applying eu
13、c%lone The contents of the curcible shall be sirred occasionally to break up any lugai vhish nay persist and the aide8 of the crucible shall be washed down with each 20-EIL pm;km sf chlosofom to insure complete removai of the stearic acid. The re5%6ue iQn, sf a reddieh-brown coorl as compare& i to a
14、 pink color obtained by a blank prepared &a an identical gamer, indfcates the presence of RDX. The residue shell be aspieted wt%L the alor of acetorre ie m lo er detegtable, the crucible and contents &idl be placed in B dsying oven at theresidue in the crucibb shaU be calcuhtecl %o %he percentage of
15、 graphite in the sample on a moisture-free beeia 8s follows $8 &e-brzxLne complance with the requirenient apecified on the drawing. The crucible and contents shall , The acetone filtrate shall be $raneferred to a 2o-ml beaker, 100 “g to 105 C for 1/2 hour, cooled in a desicei$okp, ein weighed. !%e w
16、efght of 4 t Percentage of graphite = 1QA W I A = increase in weight of filtering crucible. W weight of sample on a moisture-free bela. 4.4.3 Total lubricant-binder.-The percentage-of total lubricant-binder in the sample shall be calculated by adding the percsntagee of stearic acid. and graphite fou
17、nd to determine conpliance with the requirement specified on the drawing. P _7 3 -c .- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-tlIL-C-L3882 13 I ?7906 0275808 3 I - 4 5 &termina.bisn of might of compositiori B.-Sample egringing charges SLX be
18、 selected and inconspicuously marked for faentifieation. B uoled imia,l be detemined as followa: weighed before ffaling with Comppssieisn B. Tfie emple springing charge shall be p.laceci in the loaing: line and filled under cenditAon8 identical in all respects wi%h those employed in filling regular
19、spsbaipging snarges. charge shall ,be weighed and the weight of Coinposition B calculated to determine compliance with 3.3. 4.6 Determination of specific gravity of pellets.-Sample pellets which are as free of surface cavities and broken edges as possible shall be selected, and the height and diamet
20、er of each sampre pellet determbried to within f .o01 inch. From these measurements determine the volume of each sample pellet in cubic inches and convert thie value to volume in cubic centimeters as follows: The weight of Composition &ch serripla springing charge shall be “he filled springing Volum
21、e (cubic inches) x 16.39 = Volw in cubic centimeters Weigh each eample pellet in gram to f .O1 gram and record the weights of the pellet opposite the respective volumes. sample pellet as follows to determine compliance with the requirement specified on the drawing. Calculate the specific gravity of
22、the Specific gravity 2 v where : W : weight of pellet in grama V 2 volume of pellet in cubic centimeters 5. PREPARATION FOR DEUVERY 5.1 Packi .-The explosive sections shall be packed 40 to a box (20 sections with sleeve in 8 row8 of 5 sections each. The box shall be lined on the inside with corrugat
23、ed carboard of a similar approved material, to hold the sections securely in place. JAN-P-106, type 4 or 5j and shall be strapped in accordance with the appendix thereto except that only round atrapping, class A, galvanized steel ahall be wed. the contract of purchase order,shigmenta shall be merked
24、 in accordance with Code of Federal ReguLetione 49 CFR 71-78 and Standard MILSTD-129, The box shall comply with the requirement8 of Specification The straps shall be tensioned and sealed, but not stapled. 5.2 Iabeling and markinq.-In addition to any special mrking required by 6.1 Intended use.-The s
25、pringing charge covered by thie specification is intended for use with the blast-driven earuh rod, U3, as an explosive charge which may be inserted into the borehole after the rod has been extracted. 6.2 Ordering data .-Procurement documents should specify .Lhe title, number, and date of this specification and any desired options offered herein (see 5.1 and 5.2). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIi-C-13B82 13 77777Oh 0275809 5 m Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
