1、MIL-F- 17% 8 B(S“IFS) - 23Januan 1962 SUPERSEDISG IPF-A(SHPS) 10 March 1954 hlTLITARY SPFXIFICATION FLAME ARRESTER, VENTLATI3N-EXRAUST (NAVAL SHIPBOARD USE) 1. SCOPE . 1.1 mis spcciflcation covers ame arresters for prcrenting the pmpagation of name through ex- bust omtillting ducts which may contain
2、 fhmmable niixhues. 2. APPLICABLE DOCUMENTS 2.1 The ollowing documents d the issue in effect on the 4.2 Sizes. - Sizes of flame arrester assem- 3.4.2.1 Ehysical dimensions and tolerances.- The physical dimensions and tolerances of the flame arrester asseiiibly shall conform to Drawing S3801- 1231181
3、 for sizes specified. 3.4.3 Casing;.- The name arrester asserbly casing shall be made of galvui!ted steel equal to that of AST%? Publication-A-93 with commercial thick- ness zinc coating or black steel equal to that of ASTU PtJbliCation -A4 15. 3.4.3.; Casing and other parts made of biack steel shal
4、! Sa galvanized by the hot-dip proceso in accordance Kith ASTS1 Publication-A-386 with the spelter coriforming to grade 5 of AsTh? Publication- B-6, or by electroplating with zinc in accordance wit! type LS of ASfhl Publication-A-164 followed by a clironate treatment conforming to ASTS1 Publica- tio
5、n-8-201. 5.4.4 Enme arresting media. - nie ame ar- resting media shall b constructed of galtwized steel or bronze and shall be permanently secured in the casing in a manner to prevent passing of a flame betu ecn the media-and the casing. 3.4.5 Air filters. - Air filters shall be provided in the air
6、entering side of the casing to protect the arresting media from dust. The air filters icodized plates shall have the p3otorensitire silrer compounds Imbedded within the oxide layet Aiter photograohic processing, the image shall be sealed in the oxide layer by suitable c!ien?ical treat- mect of the l
7、ayer. StampinR of additiocal marking irJor.mition will not normally be permitted OD metil phtes. 4. QUALITY ASSURANCE PROVISIOSS 4.1 Unless otherwise specified in the contract or parchase order, the supplier is responsible for the perforname d ail inspection requirements as spec- ified herein. nie g
8、overnmerd reserres the right to perform any ai the inspections set forth Lq the spec- iication shere such inspections are deemed neces- sary to assure supplies and services conorm to pre- scribed reqairements. 4.2 Qualification tests (size 38, onlp).l- Quali- fication tests shall De conducted at a l
9、aboratory sat- isfactory to e Bureau of Ships. Tests shall be con3ricted as swified in 4.2- 1. 4.2.1 Quaiifkation tests shall be conducted OD one size 38 flame ar-ester assembly and shall con- sist of tests specified in 4.7. 4.3 Preprduction tests (exept sire 381.- Pro- dudim o itens under Uie contr
10、act or order shall not proceed usti1 one flame arrester cd each size (except size 38) corered in the contract or order shall hare successf.llp passed the tests specified in 4.7.2 to 4.7.4, inclusive. The contractor may utilize his om or any o!er laboratory satisfactory 10 the u- reau of Ships, lor t
11、he tests to be conducted. 4.3.1 bless otherwise specified In the contract or order, preprduction tests will not be rwJired on sizes of name arresters that are identical to those ahich have successfully par the preproduction tests aithiri a period of twelt-e months immediately preceding tte award of
12、the contract, 4.4 - Sam- 4.4.1 imide .and outside dimensions noa- Welding (u applicable) incomplete, not free of cracks, nonfusion, heavy po- Casing or enclosure drilled or punched holes non-conforming; holes mlssirg. Provisions not provided to hold filter assembly springs in place: sprlngs noa- Cas
13、ing or encioswe hardware (for esample, wingnuts, lockwashers, bolts an Casing surface not free of cracks, splits, tears, burrs, and sharp edges, or Casing and arresting media coating incomplete, uncoated areas (bare spots), Air filter missing, defective, or not as specilie. Access corer and gasket m
14、issing, defective, or not as specified. Painting (as ap2licable) nonconforming. Marking. rr.atufacturers name or trade mark, direction of airflow arrow conforming rosity, hewy undercut, s and the fact that the Govern- ment may have forniulated, furiiished, or in any way supplied the raid drawings, s
15、pecificatlone, or *er data is not tobe regarded by implication or othemise Licensed by Information Handling ServicesMIL- F-17548 B(SHIPS) Y in any manner licensing the holder or any other :person or corporation, or coveying any rights or permission to manufacture, use, or seu any patented invention that mop in any way be related thereto. Prepuing activitp: Navy - Ships (Project m4-N4zst: Licensed by Information Handling Services
