1、MIL-I-742F 18 March 1980 SUPERSEDING MIL-I-00742E (SH) 28 August 1978 and MIL-I-742D 26 September 1975 (See 6. S! YILITARY SPECIFICATION INSULATION BOARD, THERMAL, FIBROUS GLASS This specification is approved for use by all Departnents and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. T
2、his specification covers a fire-resistive fibrous glass thermal insulation board. 1.2 Classification. Fibrous glass thermal insulation board shall be of the following types, as specified (see 6.2.1): Type I - Fibrous glass cloth-faced board. Type II - Unfaced board. 2. APPLICABLE DOCUqENTS 2.1 Issue
3、s of documents. The following documents, of the issue meet on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL PPP-B-636 - Boxes, Shipping, Fiberboard. I ” - 1 Beneficial comments (recommen8ations, additions
4、, deletions) and any pertinent data which may be of use in improving this document should he addressed to: Commander, Naval Sea Systems Command, SEA 3112, Department of the Navy, Washington, DC 20362 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing a
5、t the end 1 of this document or by letter. J “I FSC 5640 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-1-742F MILITARY MIL-A-3316 - Adhesives, Fire-Resistant, Thermal Insulation. MIL-E-17970 - Enamel. Nonflaming (Dry), Chlori- nated Alkyd Resin
6、, Soft White, Semigloss, Formula 124/58. MIL-C-20079 - Cloth, Glass; Tape, Textile, Glass; an Thread, Glass. STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for MIL-STD-129 - Marking for Shipment and Storage. MIL-STD-1623 - Fire Performance Requirements and Inspection by Attributes.
7、Approved Specifications for Inter- ior Finish Materials and Furnish- ings (Naval Shipboard Use). (Copies of specifications, standards, drawings, and publica- tions required by contractors in connection with specific acqui- sition functions should be obtained from the contracting activity or as direc
8、ted by the contracting officer.) 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invi- tation for bids or request for proposal shall apply. AMERICAN SOCIETY FOR TESTING AND MA
9、TERIALS (ASTM) C 167 - Thickness and Density of Blanket-or Batt-Type Thermal Insulating Materials, Tests for. ties by Means of the Guarded Hot Plate. ties by Means of the Heat Flow Meter. Corrugated and Solid Fiberboard, Test for. C 177 - Steady-State Thermal Transmission Proper- C 518 - Steady-Stat
10、e Thermal Transmission Proper- D 781 - Puncture and Stiffness of Paperboard, D 1448 - Micronaire Reading of Cotton Fibers, E 84 - Surface Burning Characteristics of Building Test for. Materials. (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race
11、Street, Philadelphia, PA 19103.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-I-742F NATIONAL MOTOR FREIGHT TRAFFIC ASSDCIATION, INC. AGENT National Motor Freight Classification (Application for copies should be addressed to the National M
12、otor Freight Traffic Association, Inc., ATA TRAFFIC Dept., 1516 “P“ Street, N.W., Washington, DC 20036.) UNIFORM CLASSIFICATION COMMITTEE, AGENT Uniform Freight Classification Ratings, Rules and Regulations (Application for copies should be addressed to the Uniform Classification Committee Agent, Ta
13、riff Publication Officer, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606.) (Technical society and technical association specifications and standards are generally available for reference from libraries. They are also distributed among technical groups and using Federal agencies.) 3 . REQUIR
14、EMENTS 3.1 First article. When specified (see 6.2.11, the con- tractor shall furnish sample unit(s) for first article inspection and approval (see 4.3 and 6.3). 3.2 Type L, fibrous qlass cloth-faced board. 3.2.1 Materials. The board shall consist 0f.a backing conforming to type II unfaced board, lam
15、inated with fibrous glass cloth impregnated with a suitable resin and secured with a cement. The glass cloth facing shall be free of wrinlkes and other irregulariteis. 3.2.2 Cloth. Cloth for the board facing shall conform to the requirements of type I, class 2 of MIL-C-20079. Fibrous glass tape cove
16、ring the butted joints conform to type II, class 1 of MIL-C-20079. 3.2.3.1 Adhesive bond strength (or tape). The bond strength requirement for securing fibrous glass tape to the glass cloth-faced board shall be as specified in MIL-A-3316 (see 4.8). 3.2.3.2 Adhesive. The adhesive cement used in the f
17、abri- cation of laminated type I board shall conform to the fi.re resistance requirements of MIL-A-3316 only when the glass cloth facing (see 3.2.2) is acquired separately from type II board and subsequently laminated at the installation site. Otherwise, 3.2.8 applies for type I board when acquired
18、as a laminate directly from vendors. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-742F Sb 777770b 020875rl O MIL-I-742F 3.2.4 Facing alinement. In case the facing material does not cover the entire surface of the board, the uncovered porti
19、on of the board shall not extend back farther than 1/8-inch from any edge. The facing shall not extend over the edge of the board more than 1/8-inch. 3.2.5 Cutability. When the board is cut or sawed, the threads of the cloth facing across which the cut is made shall not be separated from the face ov
20、er a distaance of more than 1/8-inch (see 4.7.10). 3.2.6 Puncture resistance. The puncture resistance of the faced board shall not be less than 800 ounce-inches per inch of tear (see 4.7.3). 3.2.7 Paintability. The faced board, as furnished, shall be compati.ble with and shall hold one coat of paint
21、 in accordance with MIL-E-17970 without requiring any coats of priming or sizing (see 4.7.4). 3.2.8 Fire resistance. 3.2.8.1 A type I, faced board, l-inch in thickness, shall meet the fire test requirements specified in 4.7.8.1 and table III . 3.2.8.2 Type I, faced board (core only), shall pass the
22、fire test specified in 4.7.8.2 and table III. 3.3 Type II, unfaced board. 3.3.1 Materials. The basic material shall be glass, pro- cessed from a molten state into fibrous form, bonded with a binder and compressed or otherwise formed into a board. The board shall eneral , types I and II Thickness 3.4
23、 Compression 3.6 Thermal conduc- 3.7 Weig-ht -3.r tivi ty Kerf ing 3.9 Fiber diameter 3.8 I 4.8 4.7.10 4.7.3 4.7.4 4.7.8.1 4.7.8.2 No. of determi- nations per test sample 4.7.6 4.7.7 4.7.8.2 4.7.2 4.7.2 4.7.5 4.7.9 4.7.1 3 3 5 Results reported to the nearest 1/8 in: 0.5 lb. 1/32 in. 10 oz-in/in. of
24、tea r “ Flame spread.25 Smoke devel- opedlS Pass O. S percent 0.1 pH Pass 0.1 oz/sq.t* 1/16 in. 1 lb/Sq.t. O. O1 Btu-in/ hr. ft, sq. ft. “ “ I I l I 4.6 Certificate compliance. The contractor shall pre- pare a certificate of compliance in accordance with the data ordering document included in the co
25、ntract (see 6.2.2). Except for fiber diameter, thickness, and weight, the certificate of compliance shall be acceptable proof that the product being offered meets the requirements of table III of this specification provided the vendor furnishes actual test results indicating that tests have been per
26、formed to substantiate the certification. The certification shall state that the tests described in table III have been performed on products manufactured from the same basic ingredients and manufacturing process as the items being offered and that any changes in basic ingredients or process shall b
27、e promptly repprted to both the contracting activity and 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-342F 5b E 9999906 0208359 T m MIL-I-742F Commander, Naval Sea Systems Command, (Materials Engineering Department of the Navy, Washington,
28、 DC 20352. In this event the Government at its sole discretion reserves the right to require that tests for conformance to table III be conducted on-all lots before shipment is made. 4.7 Test procedures. 4,7.1 Fiber diameter. The diameter of the fiber shall be determined by either of the following m
29、ethods:l/ (a) Microscopic, Diameter of fibers shall be deter- mined microscopically on the basis of measuring 50 fibers from the samples selected in accord- ance with 4.4.2.2. The average diameter for purposes of determining conformance shall be the average of all measurements. the micronaire,instru
30、ment in accordance with ASTM D 1448 with the addition that the micro- naire unit must be calibrated for the purpose of testing fibrous glass. (b) Air - flow. The air flow method as measured by 4-7.2 Thickness and weiqht. Thickness and weight shall be determined in accordance with the method specifie
31、d in ASTY C 167. 4.7-3 Puncture resistance (type I only). Puncture resist- ance shall be determined in accordance with the method specified in ASTM D 781, except as follows: The test specimen, 24 by 18 inches, shall be placed , with the cloth faced down, between the clamping plates. The loose sleeve
32、 shall be placed against the base of the puncture point and the pointer shall be set about one inch above the expected reading. The pendulum shall be raised to the horizontal position. The pendulum shall be released by pushing the latch handle to the left. The reading on th.e proper scale shall be n
33、oted after the pendulum has completed its swing. Two determinations shall be made in the warp direction and two in the filling direction of the cloth on each specimen. 4.7.4 Paintability (type I only). When one coat of fire- retardant paint conformincr to MIL-E-17970 is applied to the cloth-faceh in
34、sulation board, the paint shall dky to a uniform smooth coat which shall have a flat to semi-gloss appearance when viewed under ordinary conditions of illumination. There shall be no shiners or flashes. Tinted colors shall dry to a uniform even color. ;/In case of dispute, the microscopic method sha
35、ll be used. 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-742F 4*7*5 Com ression. A test specimen, 12 by 12 inches, shall be cut 1TE“71 rom a u l-sired board. It shall be placed between the pressure plates of a compression testing machine,
36、accurate to plus or minus one percent of the scale. LI dial micrometer graduated to 0.001 inch shall be rigidly attached to the machine so as to measure the separation between the plates. The specimen shall be slowly compressed to 40 percent of its original thick- ness. The specimen shall then be co
37、mpressed further by adding a load equal to twice that required to compress the specimen to 40 percent of its thickness an? then released. The specimen shall be compressed again to 40 percent of its original thick- ness. The load at this point shall be recorded. Then the load shall be removed and aft
38、er S minutes, the thickness of the specimen shall be determined and compared with the original thickness. 4.7.6 Alkalinity. The alkalinity test shall be performed as follows: Weigh a 5 t .O1 gram (9) representative sample of an insulation board without facing, and place into a 500 milli- liter (mL)
39、pyrex Erlenmeyer flask or equal. Wet with 5 mL of 95 percent ethyl alcohol and add 400 mL of distilled water. Reflux for 4 hours f S minutes. At the end of this period, dis- connect the condenser and filter at once through a No. 41 Whatman paper, or equal, supported in a Buechner funnel or equal and
40、 connected to a asuction source. Wash the flask and residual material three times with 25 mt portions of hot distilled water. Titrate the combined filtrate and wash solution immediately with a 0.02N H2SO4 using 6 to 8 drops of a one percent solution of phenol-red indicator, to the disappearance of t
41、he pink color. Run a blank determination on the total amount of distilled water and alcohol and substitute the titration value in the formula below: Percent alkalinity as Na2 O = (A-B)N X 0.031 X 100 W Where : A = mL H2SO4 required to titrate sample. B - mL H2SOq required to titrate the blank. N = N
42、ormality of the H2SO4. W = Weight of sample in g. 4.7.7 pH. The pH test shall be performed as follows: A 25 g sample shall be taken by means of a cork borer21 . A representative 1-g specimen weighed to the nearest 0.001 g shall be placed in a 500 mL pyrex Erlenmeyer flask or equal and 100 mL of dist
43、illed water added. This water shall be made by the Rohm C Haas Amberlite Ion Exchange Resin HB-l. Macerate the glass insulation with the flattened end of a polyethylene stirring rod until the specimen is thoroughly wetted. Afix a 9 millimeter (mm) by 200 centimeter (cm) pyrex glass air con- denses a
44、nd set the flask.on a hot plate. The hot plate shall . 2/A representative sample is conveniently prepared by taking borings with a large cork borer through the cross section of the insulation: 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-
45、7Y2F 56 m 9999906 02067bL B E MIL-I-742F be adjusted so that it will maintain the contents of the flask at 2030F to 2120F without boiling the water. The flask and con- tents shall be heated for one hour bfter whish time the flask is cooled to 68OF to 860F. Transfer SO mt of the extract to a 100 mL p
46、yrex glass beaker and measure the pH meter with glass electrode and a saturated KC1-calomel electrode half cell capable of precision to within 0.1 pH. 4.7.8 Fire resistance. 4.7.8.1 The type I faced aboard shall be tested in accord- ance with ASTM if type II board is to be tested, the knives shall b
47、e adjusted to reach to about 1/4-inch below the surface of the board. 4.7.10.2 Ninety degree V-grooves shall be kerfed in the sample board. The grooves shall be examined for smoothness of surfaces. Then the board shall be folded and examined, and in the case of type I board? the facing shall also be
48、 examined to determine if the corners are neat and square (see 3.8). 4.8 Adhesive bond strength of tape (type L only). Adhesive bond strength shall be determine3 in accordance with MIL-A-3316, using cement conforming to class 1 of MIL-A-3316, and fibrous glass tape conforming to type II, class 1 of
49、MIL-C-20079. The tape shall be applied to the faced surface. packaginq. Sample packs and the inspec- tion of the + pack ng and marking shall be in accordance with the requirements of section 5 and the documents specified therein. Ir 4.9 Ins ection of S. PACKAGING e (The preparation for delivery requirements specified herein apply only for direct Government acquisitions.) ficd (see d 5.1 Packin Packing shall be Level A, B, or C as speci- 11 Provided by IHS
