1、- “ : mIL-P-2L722B 73 m 777770b OLL7737 5 m MIL-P-.219.2-2B 8 -June 1973 SUPERSEDING MIL-P-21922A 11 July 1966 MILITARY SPECIFICATION PLASTIC RODS AND TUBES, POLYETHYLENE This specification is approved.for use by all depart- ments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This s
2、pecification covers low, medium, and high density poly- ethylen rods and tubes for general purpose, dielectric, and weather resist- ant applications. 1.1.1 Coverage. This specification covers polyethylene rods and tubes made from material conforming to L-P-390. 1.2 Classification. Polyethylene rods
3、and tubes shall be of the applicable type, class, and grade (see 3.1 and 6.2) in accordance with table I, as follows. /FSC 9330, 9390, 4710, 4720/ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Table I. Types, Classes and Grades of Rods and Tubes Ap
4、plication I Class 1, I General I- t- 4 L Weather resistan M IH = low density; M = ml Grade Color 11 I-? II Natural and colors, including black 3 4 1 Natural 2 Colors, including black 3 Natural ,4 Colors, including black 1 Natural 2 Colors, including black 1 2 3 Natural and colors, including black 4
5、5 1 Black (carbon O. 5 * O. 1 percent by weight) Black (carbon 2.50 -t- 0.5 percent: by weight) Black (carbon O. 5 -t. O. 1 percent by weight) LAI Black (carbon 2.50 k O. 5 percent by weight) I 2 I, idium density; and H = high density. Form A - Rods Form B - Tubes 2. APPLICABLE DOCUMENCS 2.3. The fo
6、llowing 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. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-mIL-P-23922B 93 m 9999706 0337737 9 m
7、 MIL-P-2I922B SPECIFICATIONS FEDERAL L-P-390 - Plastic, Molding and Extrusion Material, Polyethylene and . PPP-B-585 - Boxes, Wood, Wirebound. PPP-B-591 - Boxes, Fiberboard, Wood-Cleated. PPP-B-601 - Boxes, Wood, Cleated-Plywood. PPP-B-636 - Box, Fiberboard. Copolymers (Low, Medium and High Density)
8、 MILITARY MIL-P-116 - Preservation, Method of MIL-L-10547 - Liners, Case, Waterproof STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes. MIL-STD-129 - Marking for Shipment and Storage. (Copies of specifications, standards, drawings, and publications required
9、 by suppliers in connection with specific procurement functions should-be ob- tained from the procuring activity or as directed by the contracting officer). 2.2 Other publications. The following documents form a part of this speci- fication to the extent specified herein. Unless otherwise indicated,
10、 the issu in effect on date of invitation for bids or request .for proposal shall apply. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) STANDARDS: D618-61(1971) Conditioning Plastics and Electrical Insulating Materials for Testing. met er. D1238-70 Measuring Flow Rates of Thermoplastics by Extrus
11、ion Plasto- D1505-68 Density of Plastics by the Dens.ty - Gradient Technique. (Applications for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103). 3 Provided by IHSNot for ResaleNo reproduction or networking permitted wi
12、thout license from IHS-,-,-MIL-P-21922B National Motor Freight Traffic Association. Incorporated, Agent: National Motor Freight.Classification. (Application for copies should be addressed to the American Trucking Associ- ation, Inc., Tariff Order Section, 1616 P Street N.W., Washington DC 20036.) Un
13、iform Classification Committee, Agent: Uniorm Freight Classification, (Application forcopies should be addressed to the Uniform Classification Committee, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606.) 3, REQUIREMENTS 3.1 Materials. Unless otherwise specified by the procuring activity (see
14、 6.2), type I material of L-P-390 shall be used for extrusion of rods and tube 3.2 Property values, The rods and tubes shall conform to the property values for density and melt index specified in L-P-390 (see 4.3.2). 3.3 Dimensions and tolerances, 3.31 Diameter and wall thickness. The diameter of ro
15、ds shall be the norn- inal diameter specified by the procuring activity (see 6.2) and tolerances shall be as specified in table II. The outside diameter and wall thickness of tubes shall be as specified by the procuring activity (see 6.2) and tol- erances shall be as specified in table III, .S 0 4 P
16、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-21922B Table II,. Rod diameter tolerances, including out of roundness 1/ Tolerance Tolerance Nominal diameter, inches Plus -Minus Nominal diameter, inches Plus Minus 118 0,010 0.010 1-1 /4 0.025 0,
17、020 3 116 0.010 0.010 1-1 12 0.025 0.020 114 0.010 0.010 2 0.040 0.020 3 I8 0.010 0.018 , 2-112 0.048 0.020 112 0.010 0.018 3 0.250 0.000 . 518 0.010 0.018 4 0.250 0.000 3 I4 0,010 0.018 5 0.250 0.000 7 I8 0.010 0.020 6 0.250 0,000 1 0.010 0.020 7 0.250 0.000 - 1/ Intermediate diameters shall confor
18、m to the tolerances of the larger di- ameters. . Table III. Tolerances for tube diameter and wall thickness Nominal outside diameter of tubes, inches r/ r I- 3 I8 41 112 5 I8 3 I4 1 1-1 /4 1-1 12 2 2-3 I4 2-112 : Tolerances , plus or minus, inches21 On outside On Wal diameter, inches 1/32 1/16 O. 00
19、75 0.005 0.006 = 0.010 0.005 0.007 0.011 0.005 0.007 O. 0125 0.005 0.007 0.015 0.006 0.008 O. 0175 0.006 0.008 o. 020 0.006 0.008 O. 025 0.006 0.009 O. 035 0.006 0.010 O. 030 0.006 0.009 , thickn 3 132 O. 008 o. O09 o. O09 o. O09 o. O10 o. O10 o. O10 o. O10 o. O10 o. O10 SS, inc 118 o. O09 o. O10 o.
20、 O10 o. O10 o O10 o. O10 o. O10 0.011 0.012 o. 012 es 31 3 116 “I o. 012 o. 012 o. 012 0.013 O. 013 O .O14 O, 015 O. 015 O. 015 - 1/ Intermediate sizes shall conform to the tolerances of the larger size. - 2/ Tolerances for diameter apply to the average outside diameter as determined by averaging tw
21、o mutually perpendicular diameters in the same cross sectional plane. Tolerance for wall thickness applies to the maximum and minimum wall thickness measured at any point around the circumference and includes eccentri- city. 3/ Tolerances for wall thickness greater than 3/16 inch shall be as specifi
22、ed by the procuring activity. 4/ Tolerances far tubes smaller than 318 inch or-larger than 2-314 inches out- side diameter, shall be as specified by the procuring activity (see 6.2). 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.3,2 Length of r
23、ods. Unless otherwise specified by the procuring activity (see 6.2), rods shall be furnished in lengths of 48 or 72 inches depending upon which is more nearly standard for the diameter specified. When both lengths are standard, the longer one shall be preferred. Tolerances for length shall be plus 1
24、.0, minus 0.0 inches for rods 1 inch or less in diameter, and plus 2.0, minus 0.0 inches for rods greater than 1 inch in diameter (see 6.2). Rods shall be -supplied in straight lengths. 3.3.3 LenPth of tubes. Unless otherwise specified by the procuring activity (see 6.2), tubes shall be furnished in
25、 straight lengths of 72 plus 1.0, minus 0.0 inches (see 6.2). 3.4 Color. The color of the rods and tubes shall be as specified by the procuring activity (see 6.2) . 3.5 Centerless grinding. When specified by the procuring activity, rods and tubes shall be extruded oversize and then centerless ground
26、 to the out- side diameter specified. The rods or tubes shall be held to the outside diameter tolerance and surface finish specified in the contract or purchase order. The wall thickness shall be as specified, plus or minus the acceptable tolerances. 3.6 Certification. The manufacturer shall present
27、 certification that the material used in preparing the rods and tubes conforms to the applicable type, class, and grade of material specified in L-P-390 (see 6.2). The certificate shall state the material designation, color, and type, grade, and class of L-P-390 to which it conforms, The certificate
28、 shall be presented prior to, or at the time of delivery of the lot, and shall be signed by a responsible agent of the supplier, and shall be accompanied by evidence of the agents authority to bind his principal. 3,7 Workmanship, The rods and tubes shall be free from kinks (see 6.3), blisters, crack
29、s, bubbles, discolorations, craze, surface scratches that form definite indentations, wrinkles, dents, die or heat marks. 4, QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the con- tract or purchase order, the supplier is responsible for the performance
30、 of all inspection requirements as specified herein. Except as otherwise speci- fied in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection requirements speci- fied herein, unless disapproved by the Government. The Government res
31、erves 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. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-2
32、1922B 4.1.1 Inspection of materials and components. In accordance with 4.1 above, the supplier is responsible for insuring that materials and components used were manufactured, tested and inspected in accordance with the require- ments of referenced, subsidiary specifications and standards to the ex
33、tent specified, In the event of conlfict, this specification shall govern, 4.2 Sampling for inspection and acceptance. Sampling for inspection and acceptance shall be performed in accordance with the provisions set forth in ML-STD-105, except where otherwise indicated. For purposes of sampling, an i
34、nspection lot for examination and tests shall consist of all rods of one nominal diameter, or tubes of one nominal outside diameter and wall thickness of the same type, class and grade of material, submitted for delivery at one time . 4.3 Inspection of the rods and tubes. 4.3.1 Examination of the ro
35、ds and tubes. Examination shall be made in accordance with the classification of defects, inspection levels and accep- table quality levels (AQLs) set forth below. The lot size, for purposes of determining the sample size in accordance with MIL-STD-105, shall be expressed in units of packages of pla
36、stic rods or tubes as applicable, for examination in 4.3.1.1, 4.3.1.2, 4.3.1.3 and-in units of shipping containers for exami- nation under 4.3.1.4. mg 4.3.1.1 Examination of the rods and tubes for defects in color, centerless rinding, and workmanship. The sample unit for this examination, specified
37、in table IV, shall be onerod or one tube, as applicable. Not more than five sample units shall be taken from any one package of rods or tubes. Table IV. Examination for defects in color, centerless grinding, and workmanship Examine Defect Color and Centerless grinding Color improper Workmanship Cent
38、erless grinding improper Not free from kinks, blisters, cracks, bubbles, discolorations, craze, surface scratches forming indentations, wrinkles, dents, die or heat marks. 4.3.1.2 Examination of the rods and tubes for dimensional defects. The sample unit for this examination, specified in table V, s
39、hall be one rod or tube, as applicable. “ . 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Table V, Examination for dimensional defects Examine Defect Diameter of rods Nominal diameter improper or varies more than tolerances specified in table I.
40、Outside diameter and wall thick- Improper outside diameter or wall thick- ness of tubes ness. Tolerances not within thzt speci- fied in table II. Length of rods Length of tubes Improper length. Not within tolerances specified for length of rods. Improper length Not within tolerances specified for le
41、ngth 4,3,1,3 Examination of the rods and tubes for defects in the count for package. The sample unit for this examination, specified in table VI shall be one package. TableVIC. Examination for defects in the count for package Examine Defect Rods and tubes Average count per package less than specifie
42、d. 4,3,1,4 Examination of preparation for delivery requirements, An exam- nation shall be made in accordance with table VI1 to determine that packag- - ing, packing and marking comply with the requirements of Section 5. The sample unit: for this examination shall be one shipping container, fully pac
43、ked, selected just prior to the closing operation. Shipping containers fully prepared for delivery shall be examined for closure defects. Examine Defect Packaging Not level specified; not in accordance with contract requirements. Rods or tubes not unit wrapped and packaged as specified. Packaging ma
44、terial not as specified; closures not accomplished by specified or required methods or materials. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-2 1-922Bj Table 1,711. Examination of preparation for delivery (cont d) Examine Defects Packing
45、Not level specified; not in accordance with contract requirements. Any nonconforming component; component missing, damaged or otherwise defective affecting serviceability. Contrainer not as specified; closures not: ac- complished by specified or required methods of materials. Inadequate application
46、of components, such as: incomplete closures of case liners or container flaps, loose or inadequate strappings, bulged or distorted containers, improper taping or inade- quate stapling. Count Less than specified or indicated quantity of packages per shipping container. Weight Gross or net weight exce
47、eds specified requirements. Markings Interior or exterior markings (as applicable) omitted, illegible, incorrect, incomplete, of im?- proper size, location, sequence, method of applica- tion, or not in accordance with contract requirements. 4.3.1.5 Inspection levels and acceptable quality levels, (A
48、QLs) for examina- - tions. The inspection levels for determining the sample size and the accep- table quality levels (AQLs) expressed in defects per 100 units, shall be as follows : Examination Paragraph Inspection Level AQL 4.3.1.1 I 1.5 4.3.1.2 s-3 2.5 4.3.1.3 s-2 4.3.1.4 s-2 4.0 -“ Provided by IH
49、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-21922B 4.3.2 Testing. The rods or tubes shall be tested for the density and -melt index characteristics specified in 3.2 for each lot submitted for inspection, in accordance with the test methods specified herein. The lot size for the purpose of determining sample size for testing shall be expressed i
