1、MIL-C-52705B 9999906 1995394 BOB I INCH-POUND I MIL-C-52705B 28 November 1994 SUPERSEDING 26 May 1977 MIL-C-52705A MILITARY SPECIFICATION COUPLINGS: HOSE, STEAM This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification
2、 covers steam hose couplings for conveyance of saturated and superheated steam. The working pressure of the couplings shall be at least 250 psig (pounds per square gauge) at a temperature of 450 OF. 1.2 Classification. The couplings shall be of the following types and sizes, as specified (see 6.2):
3、Type A - Expansion ring coupling with slotted swivel. Size - 3/4 (.75) inch. Type B - Ribbed shank coupling with hexagonal swivel. Sizes - 1/2 (.50) inch, 3/4 (.75) inch, 1 (1.0) inch, 1-1/4 (1.25) inch and 1-1/2 (1.50) inch. Type C - Ribbed shank coupling with wing nut swivel. Sizes - 1/2 (.50) inc
4、h, 3/4 (.75) inch, 1 (1.0) inch, 1-1/4 (1.25) inch, 1-1/2 (1.50) inch, 2 (2.0) inch, and 2-1/2 (2.50) inch. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: MOBILITY TECHNOLOGY CENTER - BELVOIR,
5、ATTN AMSTA RBES, 10115 GRIDLEY RD, STE 128, FT BELVOIR VA 22060-5843 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 4730 DISTRIBUTION STATEMENT A. Approved for public release, distribution is unlimited. Provi
6、ded by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-52705B m 9999906 1995395 744 m MIL-C-52705B 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. The following specifications and standards form a part of this document
7、 to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATION MILITARY MIL -H - 7 7 5 - Ho
8、se, Hose Assemblies; Rubber, Plastic, Fabric, or Metal (Including Tubing); and Associated Hardware; Packaging of. STANDARDS FEDERAL FED-STD-H28 - Screw Thread Standards for Federal Services. MIL I TARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by MIL-STD-130 - Identification Markin
9、g of US Military Property. Attributes. (Unless otherwise indicated, copies of federal and military specifications and standards are available from the STDZN DCMNT ORDER DESK, BLDG 4D, 700 ROBBINS AVE, PHILADELPHIA PA 19111-5094.) 2.2 Non-Government publications. The following documents form a part o
10、f 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, the issues of documents not listed in the DoDISS are the issues of the docu
11、ments cited in the solicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) A 47M - Ferritic Malleable Iron Castings (Metric). B 16 - Free-Cutting Brass Rod, Bar, and Shapes for Use in B 21 - Naval Brass Rod, Bar, and Shapes. B 124 - Copper and Copper-Alloy Forging Rod, Bar, and Sha
12、pes. B 135 - Seamless Brass Tube. B 453 - Copper-Zinc-Lead Alloy (Leaded-Brass) Rod. Screw Machines. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-52705B m 9999906 li995396 680 m MIL-C-52705B B 584 - Copper Alloy Sand Castings for General A
13、pplications. B 633 - Zinc on Iron and Steel, Electrodeposited Coatings of. D 2000 - Standard Classification System for Rubber Products in E 172 - Describing and Specifying the Excitation Source in Automotive Applications. Emission Spectrochemical Analysis. (Application for copies should be addressed
14、 to: AMERCN SCTY ASTM B 21, alloy optional; ASTM B 124, copper alloy no. C46200, C46400, or C48200; or ASTM B 453, alloy optional. 3.3.4 Expansion rinss. Expansion rings shall be made from seamless drawn tubing conforming to ASTM B 135, copper alloy UNS no. C23000, C26000, C27000, C27200, C28000, C3
15、3000, C33200, or C37000. 3.3.5 Rubber washers. The rubber washers shall be molded from heat-resistant and water-resistant synthetic rubber stock conforming to ASTM D 2000 M3DA A26B36C32EA14G21 and shall conform to the dimensions shown in figures 2 and 3. 3.3.6 Type B couplincl parts and clamps. All
16、type B coupling parts and clamps shall be brass conforming to ASTM B 584, copper alloy no. C85200. 3.4 Finish. Outside surfaces of sandcastings shall be made smooth by shotblasting or sandblasting. The inside surfaces of all parts, except the corrugations in male and female sections, shall be machin
17、e finished. 3.4.1 Finish on type C couplinss. Unless otherwise specified (see 6.21, type C coupling components, except washers and soft metal contact surface inserts, shall be zinc plated in accordance with the requirements of ASTM B 633, Fe/Zn 25, type II. 3.5 Corrusations. The corrugations in male
18、 and female sections shall be left rough so as to bind the hose. 3.6 Threads. Type A and type B couplings shall be threaded NPSH and type C couplings shall be threaded NPT. All threads shall be in accordance with FED-STD-H28. 3.7 Parts. A complete set of couplings of the sizes specified (see figures
19、 2, 3 and 4) shall consist of the following parts: Type A - Part 7 - Female section. - Part 8 - Male section. - Part 3 - Swivel of female section. - Part 4 - Expansion rings (one each for male and female - Part 5 - Rubber washer fitting recess in swivel. sections). 4 Provided by IHSNot for ResaleNo
20、reproduction or networking permitted without license from IHS-,-,-m1-C-527059 W 9999906 L9539B 453 MIL-C-52705B Type B - Part 1 - Female section. - Part 2 - Male section. - Part 3 - Swivel of female section. - Part 4 - Clamps for attaching hose. - Part 5 - Washer fitting recess in swivel. Type C - P
21、art 9 - Coupling. 3.8 Hydrostatic pressure. When tested in accordance with 4.5.2.1, the couplings shall be capable of withstanding a hydrostatic pressure of 400 pounds per square inch (psi). 3.9 Identification markinq. The couplings shall be identified in accordance with MIL-STD-130. 3.10 Workmanshi
22、p. Material shall be uniform in quality, clean, smooth, sound, and free from foreign material, blowholes, slivers, laps, cracks, seams, scale, burrs, buckles, damaged ends and edges, and other defects which will detrimentally affect the serviceability of the couplings. 3.10.1 Castinss. Castings shal
23、l be sound and free from patching, misplaced coring, warping, and other defects which might render the casting unsound for its intended use. 3.10.2 Machine work. Tolerances and gauges for metal fits shall conform to the limitations specified herein and on the applicable figures . 4. QUALITY ASSURANC
24、E PROVISIONS 4.1 Responsibility for inspection. 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
25、, and unless disapproved by the Government, the con tractor. own or any other facilities suitable for the performance of the inspection requirements specified herein, may be used. The Government reserves the right to perform any of the inspections set forth in the specification where such inspection
26、s are deemed necessary to assure supplies and services conform to prescribed requirements. 4.1.1 Responsibility for compliance. All items shall meet all requirements of sections 3 and 5. The inspection set forth in this document shall become a part of the contractors overall inspection system or qua
27、lity program. The absence of any inspection requirements in the document 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 manufactu
28、ring operations, is an acceptable practice to ascertain conformance to requirements, however, this does not authorize submission of known defective 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-52705B 9999906 I1995399 39T = MIL-C-52705B ma
29、terial, either indicated or actual, nor does it commit the Government to acceptance of defective material. 4.1.2 Component and material inspection. The contractor is responsible for ensuring that components and materials used are manufactured, examined, and tested in accordance with referenced speci
30、fications and standards, as applicable. 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.3). b. Quality conformance inspection (see 4.4). c. Inspection of packaging (see 4.6). 4.3 First article inspection. 4
31、.3.1 First article examination. The first article shall be examined as specified in 4.5.1, as applicable. Presence of one or more defect shall be cause for rejection. 4.3.2 First article tests. The first article shall be tested as specified in 4.5.2.1 and 4.5.2.2. Failure of any test shall be cause
32、for rejection. 4.4 Quality conformance inspection. 4.4.1 Samplinq. Sampling for examination and tests shall be in accordance with MIL-STD-105. Sample size shall be determined by using MIL-STD-105, table I and IIa. A lot shall be accepted when zero defects are found and rejected when one or more defe
33、cts are found . 4.4.2 Examination. 4.4.2.1 Individual. Each coupling shall be examined for the critical and major defects specified in 4.5.1. Presence of one or more defects shall be cause for rejection. 4.4.2.2 Samples. Samples selected in accordance with 4.4.1 shall be examined for the major defec
34、ts specified in 4.5.1. Presence of one or more defects shall be cause for rejection. 4.4.3 Tests. Samples selected in accordance with 4.4.1 shall be tested as specified in 4.5.2.1 and 4.5.2.2. Failure of any test shall be cause for rejection. 4.5 Inspection procedure. 4.5.1 Examination. The coupling
35、 assembly shall be examined as specified herein for the following defects: 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-52705B 9999906 1995400 931 MIL-C-52705B Cri tical 1. Holes in casting (see 3.3.3.1). Mai or 101. 102. 103. 104. 105. 10
36、6. 107. 108. 109. 110. Dimensions not as specified (see 3.1). Material not as specified (see 3.3). Materials are not resistant to corrosion or deterioration, or treated to be made resistant to corrosion or deterioration for the applicable storage and operating environment as specified (see 3.3.1). C
37、ontractor does not have documentation available for identification of materials, material finishes, or treatments (see 3.3.2). Finish not as specified (see 3.4). Corrugations not as specified (see 3.5). Threads not as specified (see 3.6). Incorrect or missing parts (see 3.7). Identification marking
38、missing, incomplete, or illegible (see 3.9). Workmanship not as specified (see 3.10). 4.5.2 Test. 4.5.2.1 Hydrostatic test. Subject the complete coupling assembly to a hydrostatic pressure of 400 psig for not less than 30 seconds. Examine the coupling assembly for leakage, rupture, and yielding. Lea
39、kage, rupture, or yielding shall constitute failure of this test. 4.5.2.2 Cpectro-chemical analysis. Not less than a 2-ounce metal specimen shall be taken from each lot of couplings for analysis in accordance with ASTM E 172. Failure to meet the requirements of 3.3.4 shall constitute failure of this
40、 test. 4.6 Inspection of packaqinq. The preservation, packing and marking shall be examined and tested in accordance with the quality assurance provisions of MIL-H-775. 5. PACKAGING 5.1 Preservation, packinu and markinq. The levels of preservation, packing and marking shall be in accordance with MIL
41、-H-775, or as specified by the contracting activity. 6. NOTES (This section contains information ofa general or explanatory nature that may be helpful, but is not mandatory.) 6.1 Intended use. The couplings are intended for use in joining hose in steam systems, under 250 psig. 7 Provided by IHSNot f
42、or ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-52705B 9999906 1995401 878 W MIL-C-52705B 6.2 Acquisition requirements. Acquisition documents should specify the following: a. Title, number, and date of this specification. b. Type and size coupling required (see 1.
43、2). c. Issue of DoDISS to be cited in the solicitation, and if required, the specific issue of individual documents referenced (see 2.1.1 and 2.2). (see 3.2 and 4.3). metal contact surface inserts, shall not be zinc plated (see 3.4.1). d. When a first article is required for inspection and approval
44、e. When type C coupling components, except washers and soft f. Level of preservation and packing required (see 5.1). g. Part or identifying number (PIN). 6.3 First article. When a first article inspection is required, the item(s) should be a preproduction model. The first article should consist of o
45、ne or more units. The contracting officer should include specific instructions in acquisition documents regarding arrangements for examinations, approval of the first article test results and disposition of the first articles. Invitation for bids should provide that the Government reserves the right
46、 to waive the requirement for samples for first article inspection to those bidders offering a product which has been previously acquired or tested by the Government, and that bidders offering such products, who wish to rely on such production or test, must furnish evidence with the bid that prior G
47、overnment approval is presently appropriate for the pending contract. Bidders should not submit alternate bids unless specifically requested to do so in the solicitation. 6.4 Part or identifyins number (PIN). The part or identifying number (PIN) of coupling covered by this specification shall be des
48、igned in the following form (see 6.2): M 52705 - X - X - X ! J Prefix Specification number Type code letter (see table I) Size code number (see table II) Finish code letter (type C only) (see table III) 6.4.1 Type couplinq desiqnation. The coupling type is identified by a single alphabetic character
49、 (see table I). 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- flIL-C-52705B q7777Ob L995Y02 704 m MIL-C-52705B TABLE I. Type code letter. Code number I Code number I Type Nominal size (in inches) Type A - Expansion ring coupling with slotted swivel. Type B - Ribbed shank coupling with hexagonal swivel. Type C - Ribbed shank coupling with wing nut swivel. 6.4.2 Size. The size of th
