1、MIL-P-17549D 93 W 997990b 0117091 5 31 August 1981 - SUPERSEDING MIL-P-l7549C(SHIPS) 21 March 1960 (See 6.4) MILITARY SPECIFICATION PLASTIC LAMINATES, FIBROUS GLASS REINFORCED, MARINE STRUCTURAL This specification is 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. 1. SCOPE 1.1 SCO e. This specification covers fibrous glass reinforced defined for specific grades of laminate are representative of those laminates produced by good commercial practice. plastic lam + nates for use in mar
3、ine applications. The characteristics 1.2 Classification. Plastic laminates shall be classified by grades in accordance with the mechanical properties listed in table I (see 6.2). Grade 1 - Grade 1 is the highest strength, bi-directional lam- inate reinforced with style 1581 or 7581 woven glass clot
4、h or equivalent. reinforced with style 7500 woven glass cloth or equivalent. tropic laminate reinforced with style 7544 woven glass cloth or equivalent or random glass mat. Grade 4 - Grade 4 is a bi-directional or isotropic laminate reinforced with random glass mat or equivalent. Grade 5 - Grade 5 i
5、s a bi-directional or isotropic laminate reinforced with random glass mat or equivalent, hav- ing higher resin content and lower strength than grade 4. reinforced with woven glass roving. Grade 2 - Grade 2 is a high strength, bi-directional laminate Grade 3 - Grade 3 is a medium strength, bi-directi
6、onal or iso- Grade W - Grade W is a medium strength, bi-directional laminate 1 I Beneficial comments (recommendations, additions, deletions) and any nent data which may be of use in improving this document should he addressed to: Commander, Naval Sea Systems Command, SEA 31 12, Department of the Nav
7、y, Washington, DC 20362 by using the self-addressed Standardiza tion Document Imprpvement Proposal (DD Form 1426) appearing at the end of this document or by letter. 1 I t US. GOVERNMENT PRINTING OFFICE: 1961-703-023/6560 FSC 9330 Provided by IHSNot for ResaleNo reproduction or networking permitted
8、without license from IHS-,-,-I MIL-P-17547D 73 799970b O117072 7 MIL-P-l7549D(SH) 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications. Unless otherwise specified , the following specifications of the issue listed in that issue of the Department of Defense Index of Specifications a
9、nd Standards (DoDISS) specified in the solicitation form a part of this specification to the extent specified herein. I SPECIFICATIONS MILITARY MIL-R-7575 - Resin, Polyester, Low Pressure Laminating. MIL-C-9084 - Cloth, Glass, Finished, For Resin Laminates. MIL-C-19663 - Cloth, Woven Roving, for Pla
10、stic Laminate. MIL-R-21607 - Resins, Polyester, Low Pressure Laminating, Fire Retardant. MIL-M-43248 - Mats, Reinforcing Glass Fiber. 2.1.2 Other Government publications. The following Government publications form a part of this specification to the extent specified herein. PUBLICATIONS MILITARY NAV
11、AL SEA SYSTEMS COMMAND NAVSHIPS 0939-LP-000-0010 - Inspections Manual for Fibrous Glass Reinforced Plastic Laminates. ventive Maintenance and Repair Manual. NAVSHIPS 0900-LP-006-0010 - Reinforced Plastics - Pre- I i (Copies of specifications, standards, handbooks, drawings, and publi- cations requir
12、ed by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer .I 2.1.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text o
13、f this specification shall take precedence. 2.2 Other publications. The following documents form a part of this I Specification to the extent specified herein. The issues of the documents which are indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto, i
14、f applicable. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D 638 - Tensile Properties of Plastics, Test for. D 695 - Compressive Properties of Rigid Plastics, Test for. D 790 - Flexural Properties of Plastics and Electrical In- I sulating Materials, Tests for. I 2 Provided by IHSNot for ResaleN
15、o reproduction or networking permitted without license from IHS-,-,-MIL-P-L7599D 93 =.999990b OLL7093 9 I (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) - Cont
16、inued D 792 - Specific Gravity and Density of Plastics by Dis- D 2584 - Ignition Loss of Cured Reinforced Resins, Test for. placement , Test for. 3.2.1.1 General purpose polyester resin. Unless otherwise specified (see 6.2.11, the base resin shall be in accordance with the requirements of grade A or
17、 grade B, class O of MIL-R-7575. I 3 3. REQUIREMENTS 3.1 First article. When specified (see 6.2.11, the contractor shall furnish a sample unit for first article inspection (see 4.3 and 6.3). 3.2 Materials. 3.2.1 Resin. - 3.2.1.1.1 Flexible resin. Ten percent flexible polyester resin, plus or minus 2
18、 percent, shall be mixed with the resin specified in 3.2.1.1. This flexible resin shall be obtained from the same manufacturer and shall be compatible with the base resin. 3.2.1.2 Fire resistant resin. When specified (see 6.2.11, the resin shall be in accordance with the requirements for grade 1 (st
19、andard flame resistance) or grade 2 (superior flame resistance) of MIL-R-21607. 3.2.1.3 Fillers, pigments, and other additives. The handling characteristics of the resin may be modified with a maximum of five percent (based upon the weight of resin) of fillers or other additives, providing the clari
20、ty of the resin and the translucency of the resultant laminate remain unaffected. Pigments or similar additives which would interfere with visual inspection shall not be used. 3.2.1.4 Gel coat. Unless otherwise specified, a gel coat may be used. If used, it shall consist of one brush or spray coat o
21、f clear thermosetting resin having a thickness of 0.01 to 0.02 inch and shall show no tendency to delaminate, peel, or craze. 3.2.2 Reinforcements. 3.2.2.1 Woven glass cloth reinforcements. Finished cloth shall con- form to the requirements of class 1 of MIL-C-9084 for the applicable type. 3.2.2.2 R
22、andom glass mat reinforcements. Mat reinforcements shall conform to the requirements of the applicable type and class of 3.2.2.3 Woven glass roving reinforcements. Woven roving shall be in accordance with MIL-C-19663. Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
23、se from IHS-,-,-3.2.3 The contractor shall comply with all existing laws and regula- tions governing personnel safety associated with the handling and fabricat- ing process of the materials used in this specification. 3.2.4 Recovered materials. Unless otherwise specified herein, material incorporate
24、d in the products covered by this specification shall be new and shall be fabricated using materials produced from recovered materials to the maximum extent practicable without jeopardizing the intended use. The term “recovered materials“ means materials which have been collected or recovered from s
25、olid 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 specifically speci- fied. 3.3 Mechanical and physical prope
26、rties. 3.3.1 Mechanical and physical properties shall be as specified in table I. No individual specimen tested for mechanical strength shall Yndicate a value lower than 80 percent of the average of the results of the 5 specimens tested for the property. No individual sample tested for void content
27、shall exceed the maximum percentage specified in table I for appli- cable grade. 3.3.2 Flexural strength of post-cured materials (see 4.5.2) shall not exceed the average flexural strength of first article specimens tested under standard conditions by more than 15 percent (see 4.3.4.1). Failure to me
28、et this requirement will be considered an indication of undercure and basis for rejection of the first article sample. 3.3.3 The average of ten Barcol hardness measurements that are made on production units shall not be more than 5 points lower than the average Barcol hardness measurement on the fir
29、st article sample (see 4.3.4.2). 3.4 Production control. A plastic manufacturer shall have an estab- lished quality control procedure consisting of raw materials inspection, inspection of production operations, witnessing of destructive and perform- ance tests, visual inspection, and maintenance of
30、adequate records which is consistent with NAVSHIPS 0939-LP-000-0010. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-m rl n 3 L b I al d c L P O P I+ U .Pl c m c al r 5 n MIL-P-L7549D 93 m.9999906 ELL7095 2 m MIL-P-l7549D( SH) al rl m al bD L al C
31、u ala aal nu lu EU dC Xd m Ed .-I G-m oc C oc dal &E 04 alo Lal s.2 dn vn md dm alv md .Cu uc 004 alo f 2 cla 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.5 Visual inspection. Unless the requirements for acceptance criteria are modified by the
32、 contract or order, they shall be consistent with Chapter VI of NAVSHIPS-0939-LP-000-0010. 3.6 Repairs. Defective areas or areas from which test specimens have been cut shall be repaired by the fabricator in accordance with pro- cedures outlined in NAVSHIPS-0900-LP-006-0010 prior to conducting the r
33、e- quired performance tests. No repairs shall be permitted in high stress areas (see NAVSHIPS-0939-LP-000-0010) or in other areas where such repair may impair the performance of the unit, as determined by the inspector. I I 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless ot
34、herwise specified in the contract or purchase order, the contractor is responsible for the per- formance of all inspection requirements as specified herein, otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of t
35、he in- spection requirements specified herein, unless disapproved by the Govern- ment. 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. Ex
36、cept as 4.2 Classification of inspection. The inspection requirements specified herein are classified as follows: I (a) First article inspection (see 4.3). (b) Quality conformance inspection (see 4.4). 4.3 First article inspection. First article inspection shall con- sist of the visual examination o
37、f 4.4.1 and tests specified in 4.3.4. I 4.3.1 First article inspection report. The contractor shall furnish I a first artic1e.inspection report in accordance with the data ordering document included in the contract (see 6.2.2). 4.3.2 First article sample. The first item that is manufactured under th
38、e contract or, in the case of a large structure consisting of various shaped structural members or panels, one individually laminated part of each kind shall be considered the first article sample. It shall be tested and shall meet the specification requirements (see 4.2). This first article sample,
39、 when accepted by the Government shall be considered as one of the total number to be delivered under the contract. 4.3.3 Test specimens. Test specimens shall be taken from locations on the first article sample (see 3.1) as approved by the inspector. Where possible, the test samples shall be obtaine
40、d from areas normally cut-out of the part. In the unusual cases where the item is of such a nature that satisfactory samples cannot be obtained, or where removal of such samples and subsequent repair, will seriously impair its serviceability, prototype sheets may be fabricated to the same thicknesse
41、s using the same materials and process to be employed under the contract. 4.3.4 First article tests. The first article tests shall consist of all ASTM test methods listed in table I and the tests specified in 4.3.4.1 and 4.3.4.2. I Provided by IHSNot for ResaleNo reproduction or networking permitted
42、 without license from IHS-,-,-MIL-P-L7547D 93 m 9797906 0113097 b = Number of units in sample for tests specified in: 4.4.4.1 4.4.4.2 4.3.4.1 Determination of cure. The degree of cure of the first article sample shall be determined by comparing the average flexural Acceptance numbers for tests speci
43、fied in: 4.4.4.1 4.4.4.2 strength of five specimens tested after standard conditioning with the average of five specimens tested after post-cure (see 4.5.2.1). 4.3.4.2 Barcol hardness. If the first article sample meets the requirements of 3.3.2, ten readings of Barcol hardness shall be made as speci
44、fied in 4.5.2.2 and the average of the readings shall be used as a base measurement for comparison with Barcol hardness readings obtained on first article samples (see 3.3.3). 4.4 Quality conformance inspection. Quality conformance inspection consists of the examination of 4.4.1 and the tests specif
45、ied in 4.4.4.1 and 4.4.4.2. 4.4.1 Visual and dimensional examination. Each individually lamin- ated part as well as each final assembled structure shall be examined for visual and dimensional characteristics. The inspection shall follow the detailed procedures described in NAVSHIPS 0939-LP-000-0010
46、prior to paint- ing, and shall be consistent with the first rticle inspection (see 4.3). The acceptance criteria (unless modified by the contract) shall be consist- ent with Chapter VI of NAVSHIPS 0939-LP-000-0010. 4.4.2 Test lot. A test lot shall consist of the units offered for delivery at one tim
47、e or during a fixed period of time, which have been manufactured or processed under substantially the same conditions as the first article sample with no change in glass reinforcement or resin formu- lation. 4.4.3 Sampling for quality conformance tests, A random sample of units shall be selected fro
48、m each lot in accordance with table II. TABLE II. Sampling of units for quality conformance tests. Number of units in lot 2 to 9 10 to 15 16 to 25 26 to 40 41 to 65 66 to 110 111 to 180 181 to 300 2 2 2 3 3 5 3 7 5 10 7 15 10 25 15 35 O O O O O O O O O 1 O 1 1 2 1 3 4.4.4 Quality conformance tests.
49、Specimens from each of the units in the sample selected in accordance with 4.4.3 shall be subjected to the tests specified in 4.4.4.1 and 4.4.4.2. A failure of the average of the test results to conform with any of the applicable requirements shall be 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-L7547D 93 7799906 0337078 8 considered a failure of that production unit, and if the number
