ARMY MIL-P-21922 B-1973 PLASTIC RODS AND TUBES POLYETHYLENE《聚苯乙烯塑料棒和塑料管》.pdf
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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
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