1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.Copyright 1999 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.
3、A.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-7121 FAX: (724) 776-0243TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS: http:/www.sae.org400 Commonwealth Drive, Warrendale, PA 15096-0001AEROSPACE MATERIAL SPECIFICATIONAMS-P-21922Issued JUN 1999Plastic Rods and Tubes, Pol
4、yethyleneNOTICEThis document has been taken directly from U.S. Military Specification MIL-P-21922, Amendment 1 and contains only minor editorial and format changes required to bring it into conformance with the publishing requirements of SAE technical standards. The initial release of this document
5、is intended to replace MIL-P-21922, Amendment 1. Any part numbers established by the original specification remain unchanged.The original Military Specification was adopted as an SAE standard under the provisions of the SAE Technical Standards Board (TSB) Rules and Regulations (TSB 001) pertaining t
6、o accelerated adoption of government specifications and standards. TSB rules provide for (a) the publication of portions of unrevised government specifications and standards without consensus voting at the SAE Committee level, and (b) the use of the existing government specification or standard form
7、at.Under Department of Defense policies and procedures, any qualification requirements and associated qualified products lists are mandatory for DOD contracts. Any requirement relating to qualified products lists (QPLs) has not been adopted by SAE and is not part of this SAE technical document.1. SC
8、OPE:1.1 Scope: This specification covers low, medium, and high density polyethylene rods and tubes for general purpose, dielectric, and weather resistant applications.1.1.1 Coverage: This specification covers polyethylene rods and tubes made from material conforming to L-P-390.Copyright SAE Internat
9、ional Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS-P-21922 SAE AMS-P-21922- 2 -1.2 Classification: Polyethylene rods and tubes shall be of the applicable type, class and grade (see 3.1 and 6.2) in accordance with table I,
10、as follows:Table 1. Types, Classes and Grades of Rods and TubesCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS-P-21922 SAE AMS-P-21922- 3 -2. APPLICABLE DOCUMENTS: The following documents of the is
11、sue in effect on date of invitation for bids or request for proposal, form a part of the specification to the extent specified herein. 2.1 U.S. Government Publications: Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.L-P-390 Plastic, Mo
12、lding and Extrusion Material, Polyethylene and Copolymers (Low, Medium and High DensityPPP-B-585 Boxes, Wood, WireboundPPP-B-591 Boxes, Fiberboard, Wood-CleatedPPP-B-601 Boxes, Wood, Cleated-PlywoodPPP-B-636 Box, FiberboardMIL-P-116 Preservation, Method ofMIL-L-10547 Liners, Case, WaterproofMIL-STD-
13、105 Sampling Procedures and Tables for Inspection by AttributesMIL-STD-129 Marking for Shipment and Storage2.2 ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.D618-61(1971) Conditioning Plastics and Electrical Insulating Materials for TestingD1238-70 M
14、easuring Flow Rates of Thermoplastics by Extrusion PlastometerD1505-68 Density or Plastics by the Density - Gradient Technique2.3 National Motor Freight Traffic Association, Incorporated, Agent: Available from American Trucking Association, Inc., Tariff Order Section, 1616 P Street NW, Washington, D
15、C 20036.National Motor Freight Classification2.4 Uniform Classification Committee, Agent: Available from Uniform Classification Committee, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606.Uniform Freight ClassificationCopyright SAE International Provided by IHS under license with SAENot for R
16、esaleNo reproduction or networking permitted without license from IHS-,-AMS-P-21922 SAE AMS-P-21922- 4 -3. REQUIREMENTS: 3.1 Materials: Unless otherwise specified by the procuring activity (see 6.2), type I material of L-P-390 shall be used for extrusion of rods and tubes.3.2 Property values: The ro
17、ds 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: 3.3.1 Diameter and wall thickness: The diameter of rods shall be the nominal diameter specified by the procuring activity (see 6.2) and tolerances shall be as
18、specified in table II. The outside diameter and wall thickness of tubes shall be as specified by the procuring activity (see 6.2) and tolerances shall be as specified in table III.Table II. Rod diameter tolerances, including out of roundnessNominal diameter, 1/inchesTolerancePlus Minus Nominal diame
19、ter, inchesTolerancePlus Minus1/8 0.010 0.010 1-1/4 0.025 0.0203/16 0.010 0.010 1-1/2 0.025 0.0201/4 0.010 0.010 2 0.040 0.0203/8 0.010 0.018 2-1/2 0.048 0.0201/2 0.010 0.018 3 0.250 0.0005/8 0.010 0.018 4 0.250 0.0003/4 0.010 0.018 5 0.250 0.0007/8 0.010 0.020 6 0.250 0.0001 0.010 0.020 7 0.250 0.0
20、001/ Intermediate diameters shall conform to the tolerances of the larger diameters.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS-P-21922 SAE AMS-P-21922- 5 -3.3.2 Length of rods: Unless otherwis
21、e 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 1.0, minus 0.0 inches
22、 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 Length of tubes: Unless otherwise specified by the procuring activity (see 6.2), tubes shall be furnished in straight lengths of 7
23、2 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).Table III. Tolerances for tube diameter and wall thicknessNominal outsidediameter oftubes, inches 1/Tolerances, plus or minus, inches 2/On outside diameter, inc
24、hesOn wall thickness, inches 3/1/32 1/16 3/32 1/8 3/163/8 4/ 0.0075 0.005 0.006 0.008 0.009 -1/2 0.010 0.005 0.007 0.009 0.010 0.0125/8 0.011 0.005 0.007 0.009 0.010 0.0123/4 0.0125 0.005 0.007 0.010 0.010 0.0121 0.015 0.006 0.008 0.010 0.010 0.0131-1/4 0.0175 0.006 0.008 0.010 0.010 0.0131-1/2 0.02
25、0 0.006 0.008 0.010 0.010 0.0142 0.025 0.006 0.009 0.010 0.011 0.0152-3/4 0.035 0.006 0.010 0.010 0.012 0.0152-1/2 0.030 0.006 0.009 0.010 0.012 0.0151/ Intermediate sizes shall conform to the tolerances of the larger size.2/ Tolerances for diameter apply to the average outside diameter as determine
26、d by averaging two 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 eccentricity.3/ Tolerances for wall thickness greater than 3/16 inch shall
27、 be as specified by the procuring activity.4/ Tolerances for tubes smaller than 3/8 inch or larger than 2-3/4 inches outside diameter, shall be as specified by the procuring activity (see 6.2).Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networki
28、ng permitted without license from IHS-,-AMS-P-21922 SAE AMS-P-21922- 6 -3.5 Centerless grinding: When specified by the procuring activity, rods and tubes shall be extruded oversize and then centerless ground to the outside diameter specified. The rods or tubes shall be held to the outside diameter t
29、olerance 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 certification that the material used in preparing the rods and tubes conforms to the applicable
30、 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 shall be presented prior to, or at the time of delivery of the lot, and shall be signed by a re
31、sponsible 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, cracks, bubbles, discolorations, craze, surface scratches that form definite indentations, wrinkles, d
32、ents, die or heat marks.4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility 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
33、or order, the supplier 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 set forth in the specification where such inspections
34、 are deemed necessary to assure supplies and services conform to prescribed requirements.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
35、the requirements of referenced, subsidiary specifications and standards to the extent specified. In the event of conflict, 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
36、 in MIL-STD-105, except where otherwise indicated. For purposes of sampling, an inspection 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 deliver
37、y at one time.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS-P-21922 SAE AMS-P-21922- 7 -4.3 Inspection of the rods and tubes: 4.3.1 Examination of the rods and tubes: Examination shall be made in
38、 accordance with the classification of defects, inspection levels and acceptable 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 plastic rods or tubes as applicable, for examin
39、ation in 4.3.1.1, 4.3.1.2, 4.3.1.3 and in units of shipping containers for examination under 4.3.1.4.4.3.1.1 Examination of the rods and tubes for defects in color, centerless grinding, and workmanship: The sample unit for this examination, specified in table IV, shall be one rod or one tube, as app
40、licable. Not more than five sample units shall be taken from any one package of rods or tubes.4.3.1.2 Examination of the rods and tubes for dimensional defects: The sample unit for this examination, specified in table V, shall be one rod or tube, as applicable.4.3.1.3 Examination of the rods and tub
41、es for defects in the count for package: The sample unit for this examination, specified in table VI shall be one package.TABLE IV. Examination for defects in color, centerless grinding, and workmanshipExamine DefectColor and Centerless grinding Color improperCenterless grinding improperWorkmanship
42、Not free from kinks, blisters,cracks, bubbles, discolorations,craze, surface scratches formingindentations, wrinkles, dents,die or heat marksTable V. Examination for Dimensional defectsExamine DefectDiameter of rods Nominal diameter improper or varies morethan tolerances specified in table II Outsid
43、e diameter and wall thickness of tubesImproper outside diameter or wall thickness.Tolerances not within that specified in table III.Length of rods Improper lengthNot within tolerances specified for lengthof rods.Length of tubes Improper lengthNot within tolerances specified for lengthof tubes.Copyri
44、ght SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS-P-21922 SAE AMS-P-21922- 8 -4.3.1.4 Examination of preparation for delivery requirements: An examination shall be made in accordance with table VII to dete
45、rmine that packaging, packing and marking comply with the requirements of Section 5. The sample unit for this examination shall be one shipping container, fully packed, selected just prior to the closing operation. Shipping containers fully prepared for delivery shall be examined for closure defects
46、.4.3.1.5 Inspection Levels and acceptable quality levels (AQLs) for examinations: The inspection levels for determining the sample size and the acceptable quality levels (AQLs) expressed in defects per 100 units, shall be as follows:Table VI. Examination for defects in the count for packageExamine D
47、efectRods and tubes Average count per package less than specified.TABLE VII. Examination of preparation for deliveryExamine DefectPackaging Not level specified; not in accordance with contract requirements.Rods or tubes not unit wrapped and packaged as specified.Packaging material not as specified;
48、closures not accomplishedby specified or required methods or materials.Packing Not level specified; not in accordance with contract requirements.Any nonconforming component; component missing, damaged orotherwise defective affecting serviceability.Container not as specified; closures not accomplishe
49、d byspecified or required methods of materials.Inadequate application of components, such as: incomplete closures of case liners or containerflaps, loose or inadequate strappings, bulged or distorted containers, improper taping orinadequate stapling.Count Less than specified or indicated quantity of packages per shipping conta
