ARMY MIL-C-44001 B-1990 COVER HELMET CHEMICAL PROTECTIVE《化学防护头盔罩》.pdf

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1、MIL-C-44001B 4 m 7797706 OLiLbL23 m I INCH-POUND I MIL-C-44001B 30 March 1990 SUPERSEDING MIL-C-44001A 31 March 1987 MILITARY SPECIFICATION COVER, HELMET, CHEMICAL PROTECTIVE This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This

2、 specification covers one type and size of chemical protective helmet cover. 2. APPLICABLE DOCUMENTS 2.1- Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless o

3、therwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). Beneficial comments (recommendatiors, additions, deletions) and any pertinent data

4、which may be of use in improving this document should be addressed to: U.S. Army Natick Research, Development, and Engineering Center, Natick, MA 01760-5014 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AM

5、SC N/A FSC 8415 DISTRIBUPION STATEMENT A. Approved for public release; distribution is unlimited. Licensed by Information Handling Services _-_- MIL-C-4400LB 4 = 777770b 04LbL24 T FEDERAL I A-A-2 O 3 - Paper, Kraft, Untreated A-A-50199 - Thread, Polyester Core, Cotton- or Polyester-Covered J J-W- 15

6、5 - Webbing, Textile, (Cotton, Elastic) DDD-L-20 - Label: For Clothing, Equipage, and Tentage (General Purpose) PPP-E-636 - Boxes, Shipping, Fiberboard MILITARY I MIL-1-3530 - Thread, and Twine; Mildew Resistant or Water Repellent Treated MIi-L-35078 - Loads Unit, Preparation of Semiperishable Subsi

7、stence Items; Clothing, Personal Equipment and Equipage: General Specification For MIL-C-51251 - Cloth, Coated; CBR Protective STANDARDS FEDERXL FED-STD-751 - Stitches, Seams, and Stitchings MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes MIL-STD-129 - Marking for

8、Shipment and Storage MIL-STD-147 - Palletized Unit Loads MIL-STD-731 - Quality of Wood Members for Containers and Pallets (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Bldg. 4D, 700 Ro

9、bbins Avenue, Philadelphia, PA 19111-5094.1 2.2 Non-Government publications. The following documents form a part of this Unless otherwise specified, the issues document to the extent specified herein. of the documents which are DOD adopted are those listed in the issue of the DODISS cited in the sol

10、icitation. Unless otherwise specified, the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). 2 Licensed by Information Handling ServicesMIL-C-44OOLB 4 W 9999906 OYLbL25 L W MIL-C-44001B THE COLOR ASSOCIATION OF THE UNITED STATES Departm

11、ent of Defense Standard Color Card for Sewing Threads (Color cards may be available from the Color Association of the United States, 343 Lexington Avenue, New York, NY 10016-0927. If color cards are not available from the Color Association, individual color samples may be obtained from the contracti

12、ng activity or as directed by the contracting activity.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D 3951 - Standard Practice for Commercial Packaging (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103-1187.

13、) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informational services.) 2.3 Order of precedence. In the event of a conflict between the t

14、ext of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shali be

15、 subjected to first article inspection (see 6.31, in accordance with 4.3. 3.2 Samples. Guide samples, when furnished, are solely for guidance and information to the contractor (see 6.4). Variations from the specification may appear in the sample, in which case the specification shall govern. 3.3 Mat

16、erial. It is encouraged that recycled material be used when practical as long as it meets the requirements of this specification. 3.3.1 Cloth, coated, CBR protective. The coated nylon (ripstop) butyl cloth for the body piece shall conform to MIL-C-5.1251, with the exception of the bias bow requireme

17、nt. The color shall be Olive Drab 177. 3.3.2 Webbing, elastic, cotton. The cotton elastic webbing shall conform to type II, class 3, unbleached, 1/2 inch wide of JJ-W-155 except that the require- ment for accelerated aging shall not apply and the initial tension shall not exceed 2.30 pounds. 3 Licen

18、sed by Information Handling ServicesMIL-C-44001B BY M 7977706 0416126 3 M MIL-C-44001B 3.3.3 Thread. The thread for all stitching shall be polyester-covered, cotton-covered or rayon-covered, ticket number 50, 2 or 3 ply, color CA 66022, accordance with type II, class 3 of MIL-T-3530. , conforming to

19、 A-A-50199, The thread shall be water repellent treated in 3.4 Design. The cover is made from a single piece of coated cloth with elastic webbing inserted within a hem which is sewn around the periphery of the cover. 3.5 Cut parts. 3.5.1 Body piece. Cut body piece 25 - + 1/2 inches in diameter. 3,5.

20、2 Webbing, elastic. Cut elastic webbing 26 I + 1/4 inches long. 3.6 Construction. Overlap ends of elastic webbing 3/4 + 1/2 inch and box stitch together with a 3/8 by 1/2 inch pattern centered on-the overlap. alternate, secure ends with a 1/8 inch wide, 28 stitch 1/2 inch long bartack centered on ov

21、erlap and perpendicular to length of the elastic. Bartacking shall be free from the thread breaks arid loose stitching. With the heavy coated side of the body piece facing down, double fold the edge back with the first fold 3/8 + 1/16 inch and the second fold 3/4 + 1/8, - 1/16 inch. Position the ela

22、stic webbing within the formed hem and stitch around entire periphery with stitching located 1/16 to 1/8 inch from the inner folded edge. During the stitching operation, the elastic webbing shall be stretched so that puckers caused by take-up of the elastic are not sewn into the seam. The elastic sh

23、all be inclosed within the hem with no twists and shall not be caught in the stitching. As an 3.6.1 Stitches, seams, and stitching. All stitching shall be 8-10 stitches per inch using stitch type 301 of FED-STD-751. 3.6.1.1 Type 301 stitching. Ends of all stitching shall be backstitched or overstitc

24、hed 1/2 inch minimum. Thread tension shall be maintained so that there will be no loose stitching resulting in loose bobbin or top thread, or exces- sively tight stitching resulting in puckering of the materials sewn. The lock shall be embedded in the materials sewn. 3.6.1.1.1 Repairs of type 301 st

25、itching, Repairs of type 301 stitching shall be as follows: a. When thread breaks or bobbin run-Offs occur during sewing, the stitching shall be repaired by restartingthe stitching a minimum of 1 inch behind the .end of the stitching. L/ b. Threads breaks or two or more consecutive skipped or run-of

26、f stitches noted during inspection of the item (in-process or end item) shall be repaired by overstitching. The stitching shall start a minimum of 1 inch before the 4 Licensed by Information Handling ServicesMIL-C-4400LB 4 777770b 04LbL27 5 MIL-C-44001B I defective area and continue a minimum of 1 i

27、nch beyond the defective area onto the existing stitching (except on box stitching substitute 1/2 inch for 1 inch). Loose or excessively tight stitching shall be repaired by removing the defective stitching, without damaging the materials. and restitching in the required manner. L/ - l/ I When makin

28、g the above repairs the ends of the stitching are not required to be backstitched. 3.5.1.2 Use of automated apparel equipment. Automated apparel equipment may be used to perform any of the operations specified in 3.6, providing that the seam and stitch type are as specified and the finished componen

29、t conforms to the required configuration. When a governmest furnished shaper pattern is forwarded, the component shall conform tc that pattern. 3.6.1.3 Thread ends, All thread ends shall be trimmed to a length of not more than 1/4 inch. 3.6.2 Identification label. The cover shall have an identificat

30、ion label conforming to type IV, class 5 of DDD-L-20. The label shall be applied on the top inside (lightly coated side of cloth! surface of the cover. 3.6.3 Repairs, Repairs such as mends, darns, or patches are not permitted on the cover. 3.6.4 Replacement of defective components. During the spread

31、ing, cutting, and manufacturing process, components of the cover having material defects or damages that are classified as defects in 4.4.3 shall be removed from production and replaced with non-defective and properly matched components. 3.7 Workmanship. The cover shall conform to the quality of pro

32、duct established by this specification. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Exce

33、pt as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections

34、set forth in this specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 5 Licensed by Information Handling ServicesMIL-C-44001B 4.1.1 Responsibility for compliance. All items shall meet all requirements of sections 3 and 5. The

35、inspection set forth in.this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted t

36、o the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of manufacturing operations, is an acceptable practice to ascertain conformance to requirements, however, this does not authorize submission of known defective material, either indicated or act

37、ual, nor does it commit the Government to accept defective material, 4.1.2 Responsibility for dimensional requirements. Unless otherwise specified in the contract.or purchase order, the contractor is responsible for ensuring that all specified dimensions have been met. When dimensions cannot be exam

38、ined on the end item, inspection shall be made at any point, or at all points in the manufacturing process necessary to ensure compliance with all dimensional requirements. . 4.1.3 Certificates of compliance: Where certificates of compliance are submitted, the Government reserves the right to inspec

39、t such items to determine the validity of the certification. 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.3). b. Quality conf-ormance inspection (see 4.4). 4.3 First article inspection. When a first arti

40、cle is required (see 3.1 and 6.2), it shall be examined for the defects specified in 4.4.3 and 4.4.4. 4.4 Quality conformance inspection. Unless otherwise specified, sampling for inspection shall be performed in accord.ance with MIL-CTD-105. 4.4.1 Component and material inspection. In accordance wit

41、h 4.1, components and materials shall be inspected in accordance with all the requirements of referenced documents unless otherwise excluded, amended, modified, or qualified in this specification or applicable purchase document. 4.4.2 In-process inspection. In-process inspection -shall be performed

42、on the elastic webbing to assure that the cut length and joining operation are in accordance with specified requirements. Whenever nonconformance is noted, corrections chal? be made to the items affected and lot. in-process. Parts which cannot be corrected shall be removed from production. The Gover

43、nment reserves the right to exclude from consideration for acceptance, any material or service for which.in-process inspection has indicated nonconformance. 6 Licensed by Information Handling ServicesMIL-C-4YOLB 8L( 7797706 OLiLbL27 7 4.4.3 End item visual examination. The end items shall be examine

44、d for the defects listed in table I. The lot size shall be expressed in units of helmet covers. The sample unit shall be one helmet cover. The inspection level shall be II and the acceptable quality level (AQL), expressed in terms of defects per hundred units, shall be 1.5 for major defects and 6.5

45、for total (major and minor combined) defects. TABLE I. End item visual defects Classification Examine Defect Major Minor 101 102 103 104 105 106 Cloth, coated Cut, tear or hole Abrasion mark or scratch which extends through the coating to a point where base yarn or fabric weave can be seen Uncoated

46、area Pit, blister, tunnel, or delamina- Lump or imbedded foreign matter which tion of coating protrudes so as to be readily abraded from material or easily removed by pulling manually results in delamination of coating from base fabric Crease or wrinkle which when flattened Seams and stitching: Open

47、 seams Up to 1/2 inch inclusive Mort than 1/2 inch NOTE: A seam shall be classified as an open seam when one or more stitches joining a seam are broken, or when two or more consecutive skipped or runoff stitches occur. Stitch type Incorrect stitch type Seam type Hem not double folded Stitch tension

48、Loose tension, resulting in a loose top or bobbin thread in puckering of material Excessively tight tension, resulting 20 1 107 108 1 o9 202 203 7 Licensed by Information Handling ServicesMIL-C-4LI00LB 4 9777706 OLILbL30 5 MIL-C-44001B TABLE I. End item visual defects (contd) Classification - Exami

49、ne Defect Major Minor Seams and stitching: Stitches pe inch Stitching ends Thread breaks, skipped stitches, or runoffs NOTE : Component and assembly c eannes s Identif ication label (cont d) One stitch less than minimum specified Two or more stitches less than minimum One or more stitches in excess of Specified . maximum specified 110 204 205 Not secured as specified 206 Thread breaks or two or more consecutive . skipped or runoff stitches over- stitched less than 1 inch in each direction beyond the defective stitch- ing area 207 Thread break or two or more