1、i+ . J MIL-F-23788A 20 M 9799906 0467248 8 M I INCH-POUNDI MIL-F-23788A(SH) 2 Januarv 1991 SUPERSEDING 27 November 1963 M1L-F-23788(SHIPS) MILITARY SPECIFICATION FENDERS, MARINE, VINYL, AIR FILLED This specifcation s approved for use by the Naval Sea Systems Command, Department of the Navy, and is a
2、vailable for use by all departments and agencies of the Department of Defense. i, SCOPE 1.1 Scope. This specification covers cylindrical shaped air filled plastic fenders for protection of boats and harbor craft from damage when alongside other boats or pier. 1.2 Classification. Fenders shall be of.
3、 the following sizes (see 6.2): 4 by 18 inches 5 by 24 inches 8 by 30 inches. 2, APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless o
4、therwise specified, Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this documcnt should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed
5、Standardization Document Improvcment Prop11 (DD Form 1426) appearing at the end of this document or by letter. AMSC NIA Fsc 2040 DISTRIBUTION STAlXMENT A, Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
6、 IHS-,-,-MIL-F-23788A 20 W 9999906 0467249 T I MILF-23 788A(SH) the issues of these documents are those listed in the issuc of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL PPP-F-320 MILITA
7、RY MIL-P-116 MILL- 19140 STANDARDS FEDERAL FED-STD-406 FED-STD-601 MILITARY MIL-STD- 105 MIL-STD-2073-1 Fiberboard: Corrugated and Solid, Sheet Stock (Container Grade) and Cut Shapes Preservation, Methods of Lumber and Plywood, Fire Retardant Treated Plastic: Methods of Testing Rubber, Sampling and
8、Testing Sampling Procedures and Tables for Inspection by Attributes DOD Materiel Procedures for Development and Application of Packaging Requirements (Applica Lion for copies should be addressed to the Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 191 11-509
9、4.) 2.2 Non-Government publications. The following document(s) 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 solicitation. Unless otherwise specified,
10、 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 3951 Standard Practice for Commercial Packaging 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without
11、license from IHS-,-,-MIL-F-23788A( SH) (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) Fender size diameter by length (inches) (Non-Government standards and other publications are normally available from the or
12、ganizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informational services.) Gauge Minimum Maximum (ib/in2) (lb/in2) 23 Order of precedence, In the-event of a conflict between the text of this document and the references cited
13、herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3, REQUIREMENTS 3.1 Fender composition. The fender shall consist of a one-piece cylindrical plastic shell having two mounti
14、ng flaps; one flap projecting at each end and both flaps in the same plane. 3.1.1 Outside surfrice. The outside surface of the plastic shell shall have a semi-gloss finish and shall be smooth except for the mold line and manufacturers indicia. Projection shall be not more than 0.040 inch above the s
15、urface. 3.1.2 Manufacturers indicia. The manufacturers indicia shall cover a maximum area of 6 by 3 inches. 3.13 Fender content. The fender shall be filled with air under pressure specified in table I and permanently sealed. TABLE I. Fender pressure. 4 by 18 5 by 24 8 bv 30 3 3 I 1-1/2 4 4 1-1/2 3.1
16、.4 Fenders shall be cured throughout the material. 3.2 Materials. Materials used in the fabrication of the fender shall be new. The entire body of the fender shall- be made of a white plastisol. The plastisol shall consist of dispersion of polyvinyl chloride in suitable plasticizers or mixers of pla
17、sticizers including stabilizers, pigment or other ingredients necessary to enable the plastisol to meet the requirements of this specification. 3 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-II_ MIL-F-237A 20 9999906 0467253 M I MIL-F-23788A( SH
18、) 3.3 Physical properties. 3.3.1 Physical form and dimensions. The physical form and dimensions shall be in accordance with figures 1 and 2 and table II. FIGURE 1. Plastic air-filled fender. I“- FIGURE 2. Fender dimensions. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted witho
19、ut license from IHS-,-,-f .* MIL-F-239BBA 20 = 9977906 0467252 T Fender size Dimensions in inches 5 by 24 4 by 18 Outside diameter (A) Overall length (B) Cylinder length (C) Flap length (D) Flap thickness (E) Flap width at end (J?) Center of grommet hole from end (G) 4 18 1 1-318 2-1/16 318 i-1D 1-1
20、/8 5 24 16 2-318 318 1-314 1-5/16 8 by 30 8 30 19-3/8 3-118 318 3 1-518 Tolerances (inch) +3/8, -0 +1/8, -0 2114 f 1/8 & 1/16 +3/8, -0 -I 1/8 3.3.2 Weight. Weight shall be as shown in table III. TABLE III. Fender weight. I I I I Fender size Maximum Minimum (inches) 4 by 18 5 by 24 3.50 8 by 30 10.0
21、9.00 33.3 Physical characteristics. The physical characteristics shall be as follows: 1.25 k 0.10 a. Specific gravity - b. Hardness (Shore A) - 78 & 5 durometer c. Tensile strength - 1900 k 100 lb/in2 d. Elongation - 350 f 10 percent e. Tear strength - 350 f 10 percent f. Modulus - 100 percent, loo0
22、 f 50 lb 33.4 Resistance to accelerated aging. 33.4.1 There shall be no exudation, tackiness, or stiffness of the fender. 33.4.2 The color change of the whole or part of the fender shall not be appreciable. 33.5 Grommets. The grommets in the flaps at both ends of the fender shall be a commercial siz
23、e No. 5 with a spur washer. Brass grommets and washers shall be nickel or cadmium plated. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-237A 20 999990b 0467253 li F . 3.3.6 Air core pressure. The air core internal pressures shall be as spec
24、ified in table I. 3.4 Identification. Fender identification shall be stenciled in black vinyl ink on one side of one flap as follows: Manufacturers part number Diameter and length of fender National stock number US. Government property. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspecti
25、on. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any, oth
26、er 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 are deemed necessary to ensure supplies and serv
27、ices conform to prescribed requirements. 4.1.1 Responsibility for compliance. Ail items shall meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection r
28、equirements in the specification shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of the manufacturing operations, is an acceptable pr
29、actice to ascertain conformance to requirements, however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material. 4.2 Sampling for quality conformance inspection. 4.2.1 Lot. Fenders produced from the
30、same batch material mixture shall be considered a lot. 4.2.2 Sampling for examination. Sample fenders shall be selected at random from each lot in accordance with MIL-STD-105. The inspection level shall be level II for the examination specified in 4.3. 4.2.3 Sampling for tests. Sample fenders shall
31、be selected at random from each lot in accordance with MIL-STD-105. The inspection level shall be 54 for the tests specified in 4.4. 4.3 Examination. Each fender selected in accordance with 4.2.2 shall be examined for appearance (smoothness, finish, and color) and measured to veri4 conformance to th
32、e dimensions in table II and weights in table III. Any sample fender having one or more defects specified in 4 G Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-., MIL-F-239A 20 = 999990b 0qb7254 3 I MIL-F-23788A( SH) table IV shall be rejected. If a
33、ny defects are noted in the original sample fenders, additional fenders shall be randomly selected up to same number of samples found defective or as specified in the original sampling plan and if any defects specified in table IV are noted the entire lot shall be rejected. TABLE IV. Classification
34、of defects. Categories Defects Critical: 1 Material not as specified 2 Major: 101 102 103 Minor: External cracks or signs of failure Tolerance not in accordance with table II Fender does not retain specified air pressure (see table I) Grommets not as specified or incorrectly installed (see table II,
35、 ,.dure 2 and 3. 201 202 Outside surface not clean, smooth (except for mold line and manufacturers indicia) and not with semi-gloss finish (see 3.1.1) Weight of fender not within limits specified in table III. 4.4 Tests. Completed sample fenders selected in accordance with 4.2.3 shall be subjected t
36、o the tests specified in 4.5.1 and 4.5.2. The fenders shall not burst, split, or show other signs of failure and shall return to its original shape and size. If any fender fails one or more of the tests specified in 4.5.1 or 4.5.2 the entire lot shall be rejected. 4.5 Test procedures. 4.5.1 Material
37、 specimen tests. 4.5.1.1 Hardness, Specimens shall be tested in accordance with methods 3021 and 3025 of FED-STD-Gol. 4.5.1.2 Tensile strength and modulus. Specimen shall be tested in accordance with method 4111 of FED-STD-601, utilizing dumbbell specimens prepared in accordance with figure 4111, di
38、e IV. Test specimens shall be between 0.065 and 0.075 inch thick. 4.5.13 Elongation. Ultimate elongation shall be determined in accordance with method 4121 Of FED-STD-601. . 4.5J.4 Tear strength. Specimen shall be tested in accordance with method 4211, using die C Of FED-STD-601. 7 Provided by IHSNo
39、t for ResaleNo reproduction or networking permitted without license from IHS-,-,- - MIL-F-23988A 20 E 7999906 OLlb255 5 M $2 E *II MIL-F-23788A( SH) 4.5.1 percent 5 Resistance to accelerated aging. Fused test specimens 2 by 6 by 0.125 inch +- 10 shall be exposed for a period of 120 hours as specifie
40、d in FED-STD-406, method 6022. The specimens shall be conditioned for 24 hours at 77 f 2 degrees Fahrenheit (“ F) and checked for color change, exudation, tackiness, or stiffness. 4.5.2 Fender test. 4.5.2.1 Internal pressure test. Test internal pressure within limits listed in table I by use of hypo
41、dermic needle (or other similar Government approved means) assuring complete sealing after test. Allow adequate time for resealing before proceeding with the following tests. 4.5.2,l.l Flex test. Perform a flex test to determine the development of any cracks in the internal cylinder wall of the fend
42、er due to inadequate curing. 4.5.2.1.1.1 A ram shall be made from a 2 inch channel, with 7 inches minimum length. Form web of channel into an arc with a 5 inch radius and with flanges of channel facing toward radius center. Position ram at right angles to longitudinal axis of fender and perpendicula
43、r to base on which sample is placed. 4.5.2.1,1,2 Perform test at center and approximately 2 inches from each end of the full cylinder of fender. 4.5.2.1.1.3 At each of the three locations specified in 4.5.2.1.1.2 apply 10 strokes with ram in rapid succession so that cylinder is compressed to within
44、1 inch of base plate making a total of 30 strokes. 4.5.2.1.1.4 After testing, examine fender by flexing with hand. Cup open fenders suspected to have developed internal cracks. 4.5.2.2 Compression test. At room temperature between two parallel surfaces, place fender with flaps parallel to these surf
45、aces. The lower parallel surface shall overlap the compressed fender periphery, The upper parallel surface shall overlap the compressed fender diameter and extend in length such that the flap plus 3 inches shall be exposed at each end. The upper parallel surface edge that does not overlap fender sha
46、ll have a minimum 3/16 inch radius. Compress fender with load of 200,000 pounds for a period of 30 seconds. 4.5.3.2 Impact tests. At room temperature, subject fender to impact load as follows: a. Place fender on solid concrete or steel floor with flaps parallel to floor b. The load shall be 200 poun
47、ds. The contact portion of the load shall be 3 inches nominal pipe size (nps) standard steel pipe. The length of the pipe shall be equal to fender diameter plus 2 feet. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-23788A( SH) c. Position l
48、oad 10 feet above fender with pipe longitudinal axis perpendicular to fender length and in plane parallel to floor d. The load shall strike at approximately mid-point of the fender and pipe lengths. 4.5.2.4 Cold soak. Cold soak fender at O OF for 6 hours and repeat impact test of 4.5.2.3, except pos
49、ition load 5 feet above fender. 4.53 Test failures. Test failures are defined as follows: a. Hardness greater than 83 or less than 73 b. Tensile strength less than 1800 pounds per square inch (lb/in2) c. Modulus less than 950 or more than 1050 d. Elongation less than 340 percent or more than 360 percent e. Tear strengths less than 340 or more than 360 lb/in2 f. Accelerated aging causing appreciable color ch
