1、flIL-H-L7bbbA LI7 999990b 0272594 5 D MIL-H- 17666A(SHIPS) 14 November 1966 SUPERSEDING 22 June 1953 See 6.3 MIL-H- 17666(SHIPs) MILITARY SPECIFICATION HOSE, METAL, CORRUGATED BRONZE, HIGH PRESSURE AIR SERVICE 1. SCOPE 1.1 This specification covers flexible bronze base and couplings of the corrugate
2、d type for high pressure air service (up to 3300 p. s. i.). 2. APPLICABLE DOCUMENTS 2.1 The following document of the issue in effect on date of invitation for bids or request for proposai, forms a part of the specification to the extent specified herein. SPECIFICATION FEDERAL QQ-B-637 - Brass, Nava
3、l: Rod, Wire, Shapes, Forgings and Flat Products with Finished Edges, Bar (Flat Wire and Strip). (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by t
4、he contracting officer. ) 2.2 Other publications. - The following documents form a part of this specification to the extent speci- fied herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for pro- posai shall apply. AMERICAN IRON AND STEEL INSTITUTE (&SI
5、) Steel Products Manual (Application for copies should be addressed to the American Iron and Steel Institute, 350 Fifth Avenue, New York, New York 10011.) NATIONAL BUREAU OF STANDARDS Handbook H28 - Screw-Thread Standards for Federal Services (Application for copies should be addressed to the Superi
6、ntendent of Documents, Government Printing Office, Washington, D. C. 20360. ) OFFICIAL CLASSIFICATION COMMITTEE Uniform Freight Classification Ratings, Rules and Regulations (Application for copies should be addressed to the OfficialClassification Committee, 1 Park Avenue at 33rd Street, New York, N
7、. Y. 10016. ) 3. REQUIREMENTS 3.1 4.2 (see 6.2). Preproduction sample. - Prior to beginning production a sample shall be tested as specified in Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-17bbbA q7 W 777790b 0272575 7 MIL-H- 17666A(SHIPS) 3
8、.2 Materials. - 3.2.1 The pressure carrier shall be of bronze (approximately 85 percent copper, 15 percent zinc) of such composition that it will not season crack when subjected to the test specified in 4.2.4. 3.2.2 The wire in the braid reinforcement shall be high tensile strength corrosion-resisti
9、ng steel of 3.2.3 The protective outer cover shall be of commercial bronze interlocked type metal hose of un- 3.2.4 Couplings shall be of Naval rolled brass in acccordance with QQ-B-637, half hard grade or other AISI type 304, 347 or 321. packed construction. material equal or better, as approved by
10、 the Naval Ship Engineering Center. diameter of the inner pressure carrier). Hose and couplings shall be 3/8 inch size, suitable for use with compressed air up to 3300 pounds per square inch (p. s. i.) working pressure. The hose complete with couplings shall be capable of withstanding a pressure of
11、10,000 p. s. i. without failure. an outer casing of metal interlocked hose, complete with couplings on each end. ply) seamless construction, either helical or annular with one ply nested within the other. firmly secured in place by the end couplings. The braided cover shall be two layers of wire bra
12、id. 3.3 Hose shall be identified and ordered by the size (which corresponds to the nominal clear inside 3.4 Construction. - Hose shall consist of a corrugated pressure carrier, braided reinforcement and 3.4.1 Pressure carrier. - The pressure carrier shall be close pitch, corrugated, double wall (two
13、 3.4.2 Braided cover. - The braided cover shall fit snugly over the pressure carrier and shall be 3.4.3 Protective outer covering. - The protective outer covering shall be made of unpacked flexible metal tubing of the interlocked design. The ends of the protective outer covering shall be securely fa
14、stened and sealed into the couplings and shall be so designed that flexing in service will not cause it to loosen or break away fromits bond in the coupling. 3.5 Len hs - Unless otherwise specified in the contract or order, each length shall be not less than 8-1/2 feet -gi, inc u ing couplings. Leng
15、ths shall contain no welded or brazed joints. 3.6 Couplings. - Unless otherwise specified in the contract or order, each length of hose shall be fitted with couplings securely fastened thereto without the use of heat. Each end shall terminate in a male pipe thread in accordance with the National Tap
16、er Pipe Thread Standard of Handbook H28. Unless otherwise specified in the contract or order, the size of the pipe thread (i. p. S.) shall be the same as that of the hose (hose inside diameter). Special care shall be given to the method of sealing the hose end in the coupling. 3.7 The hose shall be
17、capable of operating satisfactorily when bent to a diameter of 30 inches and when subjected to 3300 p. s. i. air. 3.8 Markin - Each coupling shall be permanently marked with the manufacturers name or trade- mark, the -+i size an the designed working pressure. Marking shall be done in such a manner a
18、s not to injure the coupling in any way nor adversely affect its performance. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. - Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified
19、 herein. Except as otherwise specified, the supplier may utilize his own facilities or any commercial laboratory acceptable to the Government. The Government reserves the right to perform any of the inspections set forth in the specifica- tion where such inspections are deemed necessary to assure su
20、pplies and services conform to prescribed requirements. Preproduction inspection. - Preproduction inspection shall consist of the examination and tests 4.2 specified in 4.2. 1. Inspection shall be conducted at the manufacturers facilities or at a commercial 2 Provided by IHSNot for ResaleNo reproduc
21、tion or networking permitted without license from IHS-,-,-MIL-H-L7bbbA Li7 m 9999906 027259b 9 m MIL-H- 17666A(SHIPS) I laboratory approved by the procuring activity. Any production prior to the satisfactory completion of the preproduction inspection shall be at the contractors risk. Sampling for pr
22、eproduction inspection. - The following samples shall be examined and tested: 4.2.1 (a) Two sections of hose with end couplings attached, the length to be not less than 9 feet exclusive of couplings, for the physical tests specified in 4.2.3. (b) One length of hose with end couplings attached, the l
23、ength to be not less than 4 feet exclusive of couplings, for the burst test specified in 4.2.2. (c) One short length of hose of a full section, including the pressure carrier and protective outer cover for the immersion test specified in 4.2.4 and for the examination specified in 4.4. 4.2.2 Burst te
24、st. - The &foot length shall be subjected to the burst test as specified in 4.5.1 and the pressure at which faifire occurs shall be determined. This pressure shall be not less than 10,000 p. s. i. testing shall have one end fixed to a bend diameter of 30 inches, 5 cycles of 6000 p. s. i. hydrostatic
25、 pressure and 10 cycles of 3000 p. s. i. air pressure shall then be applied, each pressure application lasting for not less than 10 minutes. After determining these lengths to be satisfactory under these conditions, they shall be subjected to flexing tests on a flexing device assembled by the labora
26、tory. Flexible test shall not exceed SO cycles per minute. After each 1000 cycles of flexure, the hose shall be subjected to an air test of 3000 p. s. i. for not less than 5 minutes duration in order to determine tightness. After a total of 6000 flexing cycles, an air test of 3000 p. s. i. shall be
27、applied to each sample length for not less than 10 minutes duration in addition to the 6000 p. s. i. hydrostatic test to determine its tightness. Upon the determination of the satisfactoriness of both samples up to this point, one sample length shall be withdrawn from the flexing test and shall be s
28、ubjected to a hydrostatic test to determine the pressure at which failure occurs. This pres- sure shall be not less than 10,000 p. s. i. The other sample shall be continued on the flexing test with periodic hydrostatic and air tests to determine the number of cycles until failure occurs, which shall
29、 be not less than 50,000 cycles. A record shall be maintained of the tightening of couplings required during the tests to maintain tightness. shall be subjected to the following immersion test without showing evidence of season cracking. The speci- men shall be immersed in an aqueous mercurous nitra
30、te solution containing 100 g. of mercurous nitrate and 13 m of nitric acid (specific gravity 1.42) per liter for 15 minutes. 4.2.3 Physical tests. - Each of the 9 foot long sections submitted in accordance with 4.2.1 (a) for 4.2.4 Immersion test. - A short length of full section of the pressure carr
31、ier from sample in 4.2.1 (c) 4.3 Quaiity conformance inspection. - 4.3.1 4.3.1.1 K. - For the purposes of sampling, a lot shall consist of all hose offered for delivery at one 4.3.1.2 Sampling for examination and tests. - A random sample of hose lengths shall be selected from Sampling for quality co
32、nformance inspection. - time. each lot in accordance with table I for the examination and tests specified in 4.4 and 4.5. if any sample fails in the examination or in any test the lot represented by the sample shall be subject to rejection. Table I - Sampling for examination and tests I 1 Lot size N
33、umber of sample hose lengths 8 or less All 9 to 15 8 16 to 25 10 26 to 40 13 41 to 65 16 66 to 110 20 111 to 180 25 181 to 300 35 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HIL-H-17hbbA Y? m 999970h 0272577 O m MIL-H- 17666A(SHIPS) 4.3.1.3 Sam
34、pling for burst tests. - In addition to the samples specified in 4.3.1.2, a length of hose, with couplings attached, not less than 4 feet in length, exclusive of couplings, shall be furnished for the burst test specified in 4.5.1. this specification not involving tests. 4.4 Examination. - Sample hos
35、e shall be examined to determine conformance with the requirements of 4.5 Tests.- 4.5.1 Burst test. - The 4-foot length required by 4.2.2 and 4.3.1.3 shall be subjected to a hydrostatic (water) pressure of 6dOO p. s. i. and examined for leaks or other signs of weakness. The pressure shall then be ra
36、ised gradually until 10,000 is reached and held for 5 minutes. The hose and coupling shall be inspected again. if satisfactory, the test may be discontinued and the sample destroyed. 4.5.2 Proof pressure tests. - The sample lengths selected in accordance with 4.3.1.2 shall be subjected to a hydrosta
37、tic (water) pressure of not less than 6000 p. s. i. for not less than 10 minutes duration while lying straight. In addition, each length shall have one end coiled into a circle of 30 inches bending diameter. With the hose suitably held, and with a hydrostatic pressure of 6000 p. s. i. applied, the c
38、oil shall be made to travel the entire length of hose and shall be returned. After completion of these tests, each of the sample lengths shall be subjected to an air pressure not less than 100 p. s. i. with the hose under water to detect any leakage. 4.6 Inspection for preparation for delivery. - Pr
39、eparation for delivery shall be in accordance with section 5 herein. 5. PREPARATION FOR DELIVERY 5.1 Domestic shipment and early equipment installation and for storage of onboard repair parts. - 5.1.1 Flexble metal hose. - 5.1.1.1 Preservation and packaging. - Preservation and packaging which may be
40、 the suppliers com- mercial practice, shall be sufficient to afford adequate protection against corrosion, deterioration and phy- sical damage during shipment from the supply source to the using activity and until early installation. carrier at the lowest rate and wili afford protection against phys
41、ical or mechanical damage during direct shipment from the supply source to the using activity for early installation. The shipping containers or method of packing shall conform to the Uniform Freight Classification Ratings, Rules and Regulations or other carrier regulations as applicable to the mode
42、 of transportation and may conform to the suppliers com- mercial practice. 5.1.1.3 - Shipment marking information shall be provided on interior packages and exterior shipping cont + ners in accordance with the contractors commercial practice. The information shall include nomenclature, Federal stock
43、 number or manufacturers part number, contract or order number, contractors name and destination and mechanical operating characteristics or ratings (as applicable). The nomenclature shall be “Hose, Metal, Corrugated Bronze, High Pressure Air Service. tion, packaging, packing and marking for shipmen
44、t shall be specified by the procuring activity (see 6.1). overseas shipment, which may be required when procurement is made. 5.1.1.2 Packing. - Packing shall be accomplished in a manner which will insure acceptance by common Markin 5.2 Domestic shipment and storage or overseas shipment. - The requir
45、ements and levels of preserva- (5.2.1 The following provides various levels for protection during domestic shipment and storage and 5.2. 1. 1 Preservation and packaging. - 5.2.1.2.1 Level A. - Flexible metal hose assemblies shall be cleaned in accordance with process C-1 and the coupling shall be co
46、ated with preservative type P-2 of MIL-P-116. Closure of ends shall be by 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H- 17666A(SHIps) caps conforming to MIL-C-52078 or by wrapping with barrier material conforming to MIL-B-121. The flexible
47、 hose may be coiled to a minimum diameter of 36 inches and individually packaged in containers in ac- cordance with PPP-B-636 or PPP-B-665. Container closure and sealing shall be in accordance with the applicable container specification or appendix thereto. Level C. - Preservation and packaging shal
48、l be sufficient to afford adequate protection against corrosion deterioration and physical damage during shipment from the supply source to the first receiving activity for early installation and may conform to the suppliers commercial practice. 5.2.1.1.2 5.2.1.2 Packing. - 5.2.1.2.1 Level A. - Flex
49、ible metal hose packaged as specified shall be packed in containers conform- ing to any one of thewing at the option of the contractor: Specification PPP-B-591 PPP-3-636 PPP-B-640 Classification - Overseas type Weather resistant Class 2 Shipping containers shall have MIL-L-10547 caseliner and shall be closed and sealed in accordance with the appendix to that specification. Caseliners may be omitted for fiberboard boxes in accordance with PPP- B-636 and PPP-B-640 provided that ali center and edge
