1、-J HH-G-156E 5 Amil 1993 SUPERSEDING September 25, 1967 (See 6.5) HH-G-156d FEDERAL SPECIFICATION GASKET MATERIAL, GENERAL PURPOSE; RUBBER SHEETS, STRIPS, AND SPECIAL SHAPES This specification is approved by the Commissioner, Federal Supply Service, General Services Administration, for the use of al
2、l Federal agencies. 1. SCOPE AND CLASSIFICATION 1.1 ScoDe. This specification covers material for general purpose rubber gaskets and packings except those for shipboard hatches, airports, watertight and airtight doors. 1.2 Classification. Gaskets covered by this specification shall be of the followi
3、ng types, as specified (see 6.2): Type I - Soft (nominally 40 Shore A durometer). Type II - Medium (nominally 55 Shore A durometer). Type III - Hard (nominally 80 Shore A durometer). 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 SDecifications and standards. The following specifications an
4、d standards form a part of this document to the extent specified herein. Unless otherwise 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). b
5、Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, SEA 05442, Naval Sea Systems Command, 2531 Jefferson Davis Hwy., Arlington, VA 22242-5160 by using the Standardization Document Improve
6、ment Proposal (DD Form 1426) appearing at the end of this document or by letter. A AMSC N/A FSC 5330 O DISTRIBUTION STATEMENT A. Approved for public re1ease;distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SPECIFICATIONS FED
7、ERAL MM“A-260 - Adhesive, Water-Resistant, (For Sealing PPP-B-636 - Boxes, Shipping, Fiberboard. PPP-B-1055 - Barrier Material, Waterproofed, Flexible. PPP-F-320 - Fiberboard, Corrugated and Solid, Sheet Stock Waterproofed Paper). (Container Grade), and Cut Shapes. MILITARY MIL-L-19140 - Lumber and
8、Plywood, Fire-Retardant Treated. STANDARDS FEDERAL FED-STD-123 - Marking for Domestic Shipment (Civilian FED-STD-601 - Rubber: Sampling and Testing. Agencies). MILITARY MIL-STD-190 - Identification Marking of Rubber Products. MIL-STD-289 - Visual Inspection Guide for Rubber Sheet Material. MIL-STD-2
9、98 - Visual Inspection Guide for Rubber Extruded Goods. MIL-STD-407 - Visual Inspection Guide for Rubber Molded Items. (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Bldg. 4D, 700 Robbi
10、ns Avenue, Philadelphia, PA 19111-5094.) 2.2 Non-Government Dublications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted are those listed in the issue of the DODISS cited in the solici
11、tation. 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). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D 395 - Standard Test Methods for Rubber Property - Compres- D 412 - Standard Test Methods For R
12、ubber Properties in Ten- D 573 - Standard Test Method For Rubber - Deterioration in D 792 - Standard Test Methods For Specific Gravity (Relative sion Set. (DOD adopted) sion. (DOD adopted) an Air Oven. (DOD adopted) Density) and Density of Plastics by Displacement. (DOD adopted) 2 Provided by IHSNot
13、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-HH-G-LSbE 9999974 OL4404b 233 M HH-G-156E D 2240 - Standard Test Method for Rubber Property - Durometer D 3951 - Standard Practice for Commercial Packaging. (DOD Hardness. (DOD adopted) adopted) (Application for copies s
14、hould be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) (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 throug
15、h libraries or other informational services. ) 2.3 Order of Drecedence. In the event of a conflict between the text 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 spe
16、cific exemption has been obtained. 3. REQUIREMENTS 3.1 Materials. The gasket material shall be natural rubber, synthetic rubber, or a mixture of the two, formulated and processed to meet the applicable requirements of this specification. O 3.1.1 Recovered materials. Unless otherwise specified herein
17、, all equipment, material, and articles incorporated in the products covered by this specification shall be new and may be fabricated using materials produced from recovered materials to the maximum extent practicable without jeopardizing the intended use. The term “recovered materials“ means materi
18、als which have been collected or recovered from solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of used or rebuilt products is allowed under this specification unless otherwise specifical
19、ly specified. 3.2 Phvsical properties. The rubber shall meet the applicable physical property requirements listed in table I, (see 4.6). 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HH-G-LSbE 9999974 0144047 L7T HH-G-156E TABLE I. Phvsi Property
20、 (a) Initial: Tensile strength, p.s.i, minimum Ultimate elongation, percent minimum Hardness, Shore A durometer Specific gravity, maximum Water extraction, percent, maximum (b) After oven aging 94 f 1/4 hours at 158 f 2F: Tensile strength, percent of initial Ultimate elongation, percent of Compressi
21、on set, percent, maximum minimum initial minimum (c) After water immersion 166 f 1 hours at 212F: Tensile strength, percent of initial Ultimate elongation, percent of Volume change, percent maximum minimum initial, minimum (d) Flexibility at minus 20 if not possible then from a different length in t
22、he roll. 2J When test specimens can not be cut from the cut, molded, or extruded gaskets, special test pieces representing the gaskets shall be obtained from different parts of the batch. These pieces shall be certified to be of the same composition and equivalent cure as the finished gaskets submit
23、ted in the lot. The sample sizes shall be 6 by 6 inches by 0.080 k 0.010 inch thick, 4 by 4 by 1/2 inch thick, and 10 by 1 by 1/4 inch thick as required for the various tests. - 3/ All defective items shall be replaced with acceptable items prior to lot acceptance. criteria is reached, reject the en
24、tire lot. test. - 4/ Inspect sample size until reject criteria is reached. If reject - 5/ Reject lots may be screened and resubmitted for inspection and 4.3.3.1 Defects defined. Major defect and minor defect as used in table III are defined as follows: A major defect is a defect that is likely to re
25、sult in failure, or to reduce materially the usability of the unit of product for its intended purpose, or is a departure from established standards having little bearing on the effective use or operation of the unit. Total defects is defined as major and minor defects combined. Any number of defect
26、s greater than the applicable acceptance number is a rejection number and this shall be cause for rejection of the lot represented by the sample. 4.3.4 Sampling - for production check test. Sampling for production check test specified in 4.5 shall be in accordance with table V from material which ha
27、s passed the examination of 4.4.1. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HH-G-156E TABLE V. Sampling for production check test. v Lot size required for each test material number of specimens pounds of Sample size, L/, Up to 150 1 151 to 2
28、80 3 281 to 1200 5 1201 to 3200 13 b lJ In sheet and strip material each test specimen shall be cut from a different roll; if not possible then from a different length in the roll. 2J When test specimens can not be cut from the cut, molded, or extruded gaskets, special test pieces representing the g
29、askets shall be obtained from different parts of the batch. These pieces shall be certified to be of the same composition and equivalent cure as the finished gaskets submitted in the lot. The sample sizes shall be 6 by 6 inches by 0.080 f 0.010 inch thick, 4 by 4 by 1/2 inch thick, and 10 by 1 by 1/
30、4 inch thick as required for the various tests. 4.4 gualitv conformance examination and tests. 4.4.1 Visual and dimensional examination. Each of the samples selected in accordance with 4.3.2 shall be subjected to surface examinations for identification marking, workmanship, dimensions, and tolerance
31、s. MIL-STD-289, MIL-STD-298, and MIL-STD-407, as applicable, shall be used to determine and evaluate visual defects. The dimensions shall be determined as described in FED-STD-601, method 2011 for thickness, method 2111 or 2121, as applicable for width, and method 2411 for length. 4.4.1.1 Reiection.
32、 Any gasket containing one or more defects shall not be offered for delivery and if the number of defective gaskets or unit areas of strips or sheet material exceeds the applicable acceptance number, this shall be cause for rejection of the entire lot represented by the sample. 4.4.2 Oualitv conform
33、ance tests, Quality conformance tests shall be conducted on samples from (or representing) all intermediate lots on which production check tests were not performed (see 4.5). Quality conformance tests shall consist of the tests specified in 4.6.2, 4.6.3, and 4.6.7. 4.5 Production check tests. Produc
34、tion check tests shall be conducted on samples from (or representing) the first lot of material and from every fifth lot thereafter. Production check tests shall consist of all the tests specified in 4.6. 8 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I
35、HS-,-,-HH-G-&5bE = 9999974 0344052 537 HH-G-156E O 4.5.1 Action in case of nonconformance. If any of the samples in the production check tests is found not to be in conformance with the requirements of the specification, this shall be cause for rejection of the entire lot. Furthermore, additional sa
36、mples shall be selected or provided from each subsequent lot and shall be subjected to the test or tests wherein the failure occurred. Each lot shall then be considered acceptable only after satisfactory results are obtained on the test or tests by all the samples taken or provided to represent the
37、lot. This additional testing shall be discontinued after four successive lots have passed the test or tests. 4.6 Test Drocedures. 4.6.1 Test conditions. Unless otherwise specified herein, tests shall be made at a room temperature of 80 2 9 degrees Fahrenheit (OF) (27 2 5 degrees Celsius (“C) and a r
38、elative humidity of 50 5 5 percent. The specimens shall be conditioned for not less than 3 hours before being tested, and shall be tested in the same atmosphere. 4.6.2 Tensile properties. The tensile strength and ultimate elongation shall be determined as specified in ASTM D 412. 4.6.3 Hardness. Har
39、dness shall be determined as specified in ASTM D 2240 using a Shore A durometer and a 3-second reading. The specimens shall be 1/4 inch thick. Plied up specimens may be used. O 4.6.4 Specific gravity. The specific gravity shall be determined as specified in ASTM D 792. 4.6.5 Extraction in distilled
40、water. The percent extraction shall be determined in accordance with method 6621 of FED-STD-601, except that the specimens shall be 0.080 0.010 inch thick. The water solution shall be evaporated to dryness on a steam bath and the residue shall be dried at a temperature of 122 2 3.6F (50 2 2C). 4.6.6
41、 Tensile properties after oven aging. The tensile strength and ultimate elongation shall be determined after oven aging in accordance with ASTM D 573 except that the aging period shall be 94 2 1/4 hours. 4.6.7 Compression set. The compression set shall be determined in accordance with method B of AS
42、TM D 395 except that the aging period shall be 94 2 1/4 hours at 158 2 1.8OF (70 2 2C). 4.6.8 Tensile properties after water immersion. The tensile strength and ultimate elongation shall be determined after water immersion in accordance with method 6611 of FED-STD-601. 4.6.9 Volume change after wate
43、r immersion. The volume change shall be determined after water immersion in accordance with method 6211 of FED-STD-601 except the immersion temperature shall be 212 2 2OF (100 2 1.l“C) and the immersion time shall be 166 2 1 hour. 9 Provided by IHSNot for ResaleNo reproduction or networking permitte
44、d without license from IHS-,-,-HH-G-LSbE 9999974 0344053 473 D . HH-G-156E 4.6.10 Flexibility (types I and II only). The flexibility shall be O determined in accordance with method 5211 of FED-STD-601 except that the specimens shall be 0.250 2 0.010 inch thick and the conditioning temperature shall
45、be 20 f. 2F (29 2 1.l“C). 4.7 InsDection of packaginq. An inspection shall be made to determine that the preservation, packing and marking comply with the requirements of section 5. For examination of packaging the sample unit shall be one shipping container fully prepared for delivery, selected at
46、random just prior to the closing operations. Defects of closure shall be examined on shipping containers fully prepared for delivery. The lot size shall be the number of shipping containers in the end item inspection lot. Sampling shall be in accordance with MIL-STD-2073-1. 5. PACKAGING (The packagi
47、ng requirements specified herein apply only for direct Government acquisition.) 5.1 General. 5.1.1 Naw fire-retardant requirements. (a) Treated lumber and Dlvwood. When specified (see 6.2), all lumber and plywood including laminated veneer material used in shipping container and pallet construction,
48、 members, blocking, bracing, and reinforcing shall be fire-retardant treated material conforming to MIL-L-19140 as follows: O Levels A and B - Type II - weather resistant. Level C - Type I - non-weather resistant. Category 1 - general use. Category 1 - general use. (b) Fiberboard. When specified (se
49、e 6.2), fiberboard used in the construction of class - domestic, non-weather resistant fiberboard and cleated fiberboard boxes including interior packing forms shall meet the flamespread index and the specific optic density requirements of PPP-F-320 and amend- ment thereto. 5.1.2 Asbestos. 5.1.2.1 Dusting material. Unless otherwise specified (see 6.2), dusting material such as talc, talcum and powdered soapstone shall be asbestos free (see 6.3). 5.2 Preservatio
