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 2006 SAE InternationalAll rights reserved. No part of this publication may be
3、reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE.TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada)Tel: 724-776-4970 (outside USA)Fax: 724
4、-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgAEROSPACE STANDARDAS26860Issued 1998-02Reaffirmed 2006-11Indicator, Humidity, Plug, Color ChangeRATIONALEThis document has been reaffirmed to comply with the SAE 5-year Review policy.NOTICEThis document has been taken directly f
5、rom U.S. Military Specification MIL-I-26860B, Amendment 2 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 is intended to replace MIL-I-26860B, Amendment 2. Any
6、 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 to accelerated adoption of government specifications
7、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 format.Any material relating to qualified product lists
8、has not been adopted by SAE. This material was part of the original military specification and is reprinted here for historic reference only.SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS26860 SAE AS26860 - 2 -1. SCOPE:1.1 T
9、his specification establishes requirements for externally mounted color change humidity indicators for determining relative humidity within rigid containers and flexible moisture-vapor-proof envelopes or bags.1.2 Classification:Indicator plugs shall be of the following type, as specified (see 6.2).T
10、ype I - For mounting in threaded boss.Type II - For mounting with self-containing locking device or in threaded boss.2. APPLICABLE DOCUMENT:2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of the specification to the extent specif
11、ied herein.SPECIFICATIONSFederalQQ-A-225/5 Aluminum Alloy Bar, Rod, And Wires; Rolled, Drawn, Or Cold Finished, 2017QQ-A-225/6 Aluminum Alloy Bar, Rod, And Wire; Rolled, Drawn, Or Cold Finished, 2024UU-P-63 Paper, BlottingPPP-B-601 Boxes, Wood, Cleated-PlywoodPPP-B-636 Boxes, Shipping, FiberboardPPP
12、-P-420 Plugs And Flanges (For Drum Closures)MilitaryMIL-P-116 Preservation Methods OfMIL-B-131 Barrier Material, Water Vaporproof Flexible, Heat SealableMIL-P-5425 Plastic, Sheet Acrylic, Heat ResistantMIL-S-6855 Synthetic Rubber Sheet, Strips, Molded Or Extruded ShapesSAE AS26860 - 3 -2.1 (Continue
13、d):STANDARDSMilitaryMIL-STD-105 Sampling Procedures And Tables For Inspection By AttributesMIL-STD-129 Marking For Shipment And StorageMIL-STD-130 Identification Marking Of US Military PropertyMIL-STD-171 Finishing Of Metal And Wood SurfacesMS18013 Indicator, Humidity, Plug, Color ChangeMS27215 Plug
14、, Dehydrator, Humidity Indicating, Engine Cylinder, 18MM ThreadDRAWINGSOrdnance Corps9129386 Plug, Humidity Indicator(Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity
15、 or as directed by the contracting officer.)2.2 Other publications:The following document forms a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply.UNIFORM CLASSIFICATION COMMI
16、TTEEUniform Freight Classification Rules(Application for copies should be addressed to the Uniform Classification Committee, Room 202, Union Station, 516 W. Jackson Blvd., Chicago IL 60606.)SAE AS26860 - 4 -3. REQUIREMENTS:3.1 Preproduction testing:This specification makes provisions for preproducti
17、on testing.3.2 Preproduction sample:Unless otherwise specified (see 6.2), the contractor shall furnish as soon as practical after the award of contract or order six (6) preproduction samples for inspection. This inspection shall consist of the examination and tests specified in 4.3.1.2 and 4.5 and s
18、hall be conducted prior to the submission for acceptance of the remainder of the gages furnished under contract. The preproduction samples shall be identical to the units the contractor proposes to furnish in fulfillment of the contract. These samples will be expended in testing. Approval of preprod
19、uction samples shall not relieve the contractor of his obligation to meet the requirements of the specification for the remaining units to be delivered under the contract.3.3 Materials:Material used in the manufacture of humidity indicators shall conform to the applicable Government specifications o
20、r where Government specification are not involved shall be of higher quality to insure that the indicator plugs meet all the performance requirements specified herein.3.3.1 Metal: Metal components of the humidity plug shall be manufactured from brass or an aluminum alloy conforming to QQ-A-225/5 or
21、QQ-A-225/6. Unless otherwise specified, all metal surfaces not exposed to the contained atmosphere shall be finished with a suitable protection in accordance with MIL-STD-171 such as zinc plating for brass and anodizing for aluminum.3.3.2 Gaskets - O rings: Sealing gaskets shall be manufactured from
22、 material conforming toMIL-S-6855, Class II, Grade 60.3.3.3 Spacer - separating washer: The separating washer shall be manufactured from asbestos rubber or any other nonmetallic material which will not affect the environmental requirements of the humidity indicator.3.3.4 Transparent viewer: Material
23、 used in the manufacture of the viewing window shall be clear transparent plastic conforming to MIL-P-5425.3.3.5 Indicating element: The relative humidity indicating element shall be manufactured from blotting paper conforming to UU-P-63, Grade B, except the paper shall be white in color, halftone a
24、nd smooth on both sides. The thickness shall be 0.0185 0.0035 inches. The blotting paper shall be impregnated with a chemically pure cobaltous chloride solution. No chemical additives shall be used except for spots manufactured to change color above 50 percent and under 20 percent relative humidity.
25、SAE AS26860 - 5 -3.4 Design and construction:3.4.1 General: The humidity indicators shall be so designed that the indicating element is freely exposed to the contained atmosphere and only common hand tools are required to install and remove the plugs from rigid or flexible containers. The design sha
26、ll be such that the exterior gaskets seat in a rectangular groove in the plug. The depth of the groove shall be not less than 60 percent nor more than 70 percent of the original gasket thickness.3.4.2 Type I: The type I indicators shall be suitable for installation in threaded plug openings of engin
27、e cylinders. Thread length, diameter and the number of threads shall be as specified in MS27215.3.4.3 Type II: the type II indicators shall be suitable for attachment in barrier material conforming toMIL-B-131, Class 1 or 2, or in metal containers. The corners of the indicator plug and locknut which
28、 will be adjacent to the barrier material shall be so rounded as to preclude puncturing of the barrier material during installation. (Reference Ordance Drawing 9129386 and MS18013).3.4.3.1 Size: Unless otherwise specified, the type II indicators shall be externally threaded with a3/4-inch modified N
29、ational Standard straight pipe thread as specified in the Table titled “Plug Thread Sizes” of PPP-P-420.3.5 Performance:3.5.1 Leakage: There shall be no leakage of the indicator plug when tested in accordance with 4.5.2.3.5.2 Color and sensitivity of the indicating element: The indicating element wh
30、en impregnated with the chemical solution shall be a lavender or lavender-pink when at equilibrium with the specified relative humidity measured at 73.5 Fahrenheit (F) 3.5F, blue at a relative humidity atmosphere5 2.5 percent lower than the stated relative humidity. Equilibrium shall be reached with
31、in 24 hours when tested under static conditions as specified in 4.5.1.3.5.3 Moisture vapor transmission rate of type II indicator plugs (aluminum): When tested in accordance with 4.5.3 and calculated as specified in 4.5.3.1, the moisture vapor transmission rate (MVTR) of the test pouch in which the
32、type II indicator plug has been installed shall not exceed 0.07 gram of water per 100 square inches for a period of 24 hours.3.5.4 Viewing area: The indicating element shall be covered by an optically clear plastic window with no point on thyperiphery of the viewing area being less than 5/16 inch fr
33、om the center of the viewing area.3.5.5 Markings: Unless otherwise specified in the contract or purchase order, single-spot element with a 40 percent specified relative humidity shall have printed in black on the center of the card “Represerve When Pink.” Multiple-spot indicating elements shall be i
34、dentified with black numbers stating the specified relative humidity of each spot. All letters and numbers shall be visible through the viewing cover.SAE AS26860 - 6 -3.6 Identification of products:Indicators shall be marked in accordance with MIL-STD-130.3.7 Workmanship:The completed humidity indic
35、ator shall have no mold marks, cracks, splits nor other visible defects which may impair the physical properties and performance of the indicator in any way.4. QUALITY ASSURANCE PROVISIONS:4.1 Responsibility for inspection:Unless otherwise specified in the contract or purchase order, the supplier is
36、 responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract 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 Go
37、vernment. The Government reserves 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.4.1.1 Inspection of components and materials: In accordance with 4.1, the suppli
38、er is responsible for insuring that material and components used were manufactured, tested, and inspected in accordance with the requirements of referenced subsidiary specifications and standards to the extent specified, or in accordance with this specification. In the event of conflict, this specif
39、ication shall govern.4.2 Inspection classification and requirements:Inspection shall be classified as follows:a. Preproduction inspection (see 4.2.1).b. Quality conformance inspection (see 4.3).4.2.1 Preproduction inspection: The preproduction inspection shall be performed on six units submitted in
40、accordance with 3.2 unless otherwise specified (see 6.2). This inspection shall include the examination of 4.3.1.2 and tests of 4.5.1.4.3 Quality conformance inspection:Quality conformance inspection shall consist of all the tests specified in 4.3.1.2 and 4.3.1.3 and performance tests 4.5.1, 4.5.2 a
41、nd 4.5.3.SAE AS26860 - 7 -4.3.1 Sampling for inspection: Sampling for inspection shall be performed in accordance with the provisions set forth in MIL-STD-105 except where otherwise indicated. For purposes of sampling, an inspection lot shall consist of all plugs produced under essentially the same
42、conditions and presented for inspection at one time. The level of inspection and the acceptable quality (AQL) shall be as specified herein.4.3.1.1 Rejected lots: If an inspection lot is rejected, the supplier may withdraw the lot, rework it to correct the defects, or screen out the defective units a
43、nd reinspect. Rejected lots shall be reinspected using tightened inspection levels.4.3.1.2 Examination of the end item for defects in material, construction, identification and workmanship. The sample unit for this examination shall be one plug visually inspected.Examine DefectsMaterial Gaskets or s
44、ealing material adjacent to indicatingelement. Separating washer not rubber asbestos orequal. Rubber gaskets and O rings not MIL-S-6855,Class II. Viewer not clear transparent or plasticMIL-P-5425. Metal not brass or aluminum alloyQQ-P-225/5 or /6. Indicating element notblotting paper UU-P-63.Constru
45、ction Indicating element not freely exposed to interiorarea of container. Exterior gaskets not properlyseated in plug groove. Blotting paper not white incolor half tone and smooth on both sides. Indicatingelement wrong side up or missing. Metal surfacesexposed to outside atmosphere not finished.Iden
46、tification Illegible, incorrect or incomplete markings.Workmanship Surface defects, burrs, splits, tears, cracks.SAE AS26860 - 8 -4.3.1.3 Examination of the end item for defects of dimensions: The sample unit for this inspection shall be one indicator.4.3.1.4 Inspection levels and accepted quality l
47、evels (AQL) for examination and tests of production lots:4.4 Performance:Performance tests are those tests performed on humidity indicator plugs in accordance with the requirements of the specification and are required to be submitted for acceptance under a contract of purchase order. The level of i
48、nspection and the acceptable quality level shall be as specified herein.Examine DefectsBlotting Paper Gage Blotting paper not proper thickness.Plastic Window Gage Viewing area less than 5/8-inch diameter.External Screw GageThreadThread size not 3/4-inch straight pipe threadfor type II plugs.Examinat
49、ion orTest Paragraph Inspection Level AQL4.3.1.2 II 2.54.3.1.3 S-3 2.54.5.1 S-4 1.04.5.2 S-4 1.04.5.3 S-1 2.5SAE AS26860 - 9 -4.5 Test methods:4.5.1 Color and sensitivity of indicating element: The samples under test whether single or multiple spot elements shall be placed in a static relative humidity atmosphere of 5 2-1/2 percent below and5 2-1/3 percent above the relative humidity critical for the indicating spot being tested and at a temperature of 72.5F 3-1/2F. The samples shall remain in the static atmosphere for 24 h
