1、MIL-C-LLYLBH Y7 9999906 1020b90 8bT H c * 1 INCH-POUND 1 MIL-C-11418H 30 June 1992 SUPERSEDING 14 August 1980 MIL-C-11418G MILITARY SPECIFICATION CLAMPS, LEAK REPAIR, PIPE COUPLING: FOR USE OVER GROOVED-TYPE COUPLINGS This specification is approved for use by all Departments and Agencies of the Depa
2、rtment of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for the repair clamps to be used to provide leakproof, flexible housing over leaking couplings of grooved-end pipe. 1.2 Classification. Clamps shall be the following nominal pipe sizes, as specified (see 6.2): 4 - inch
3、 6 - inch 8 -inch 12 -inch 2. APPLICABLE DOCUMENTS 2.1 Government documents. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: USA Belvoir Research, Development, and Engineering Center, ATTN: STRB
4、E-TSE, Fort Belvoir, VA 22060-5606 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. Provided by IHSNot for ResaleNo reprodu
5、ction or networking permitted without license from IHS-,-,-MIL-C-11418H 2.1.1 Specifications and standards. The following specifications and standards form a part of this document to the extent specified herein. otherwise specified, the issues of these documents are those listed in the issue of the
6、Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). Unless SPECIFICATIONS FEDERAL L-P-378 PPP- B - 601 PPP - B - 621 MILITARY MIL-P-116 MIL-T-704 MIL-C-10387 - Plastic Sheet and Strip, Thin Gauge, Polyolefin. - Boxes, Wood
7、, Cleated-Plywood. - Boxes, Wood, Nailed and Lock-Corner. - Preservation, Methods of. - Treatment and Painting of Materiel. - Couplings, Clamp, Pipe; with Bolts and Synthetic- Rubber Gasket for Grooved-End Pipe and Tube. STANDARDS FEDERAL FED-STD-595 - Colors for Use in Government Procurements MILIT
8、ARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by MIL-STD-129 MIL-STD-130 - Identification Marking for US Military Property. MIL-STD-210 - Climatic Information to Determine Design and Test Requirements for Military Systems and Equipment. MIL-STD-889 - Dissimilar Metals. Attributes.
9、- Marking for Shipment and Storage. (Unless otherwise indicated, copies of federal and military specifications, and standards are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Phailadelphia, PA 19111-5094.) 2.2 Non-Government Dublications. The following do
10、cuments form a part of 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 t
11、he issues of the documents cited in the solicitation (see 6.2). 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-c MIL-C-LLqLH 47 W 9979906 LO20692 632 MIL-C-11418H AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) A 47 A 183 A 193 A 194 A 536 B 26
12、B 633 D 395 D 412 D 471 D 573 D 1053 D 1229 D 2240 D 3951 D 3953 D 4675 - Ferritic Malleable from Castings. - Carbon Steel Track Bolts and Nuts. - Steel, Stainless and Alloy Steel Bolting Materials - Nut for Bolts, Carbon and Alloy Steel for High - Castings, Ductile Iron. - Aluminum-Alloy Sand Casti
13、ngs. - Zinc on Iron or Steel, Electrodeposited Coatings of. - Rubber Property - Compression Set. - Rubber Properties in Tension. - Rubber Property - Effects in Liquids. - Rubber Deterioration in an Air Oven. - Measuring Rubber Property - Stiffening at Low - Rubber Property - Compression Set at Low -
14、 Rubber Property - Durometer Hardness. - Standard Practice for Commercial Packaging. - Strapping, Flat Steel and Seals. - Selection and Use of Flat Strapping Materials. for High Temperature Service. Pressure and High Temperature Service. Temperatures Using a Torsional Wire Apparatus. Temperature. (A
15、pplication for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. also may be available in or
16、 through libraries or other informational services.) These documents 2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence, Nothing in this document, however, supersedes applicable laws and re
17、gulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Description. The repair clamps shall be designed to clamp over the couplings specified in MIL-C-10387 and form a tight seal on the pipe surfaces on both sides of the coupling, thereby containing any liquid leaking from the
18、pipe-coupling joint area. along the length of pipe to prevent leakage over a small area such as a bullet hole. The repair clamp also shall fit over any portion 3.2 First article. When specified (see 6.2), a sample shall be subjected to first article inspection (see 6.3) in accordance with 4.3. 3 Pro
19、vided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-LL4LAH 47 9999906 LO20693 579 W Size Working Pressure (inches) (psi) 4 600 6 600 8 450 12 300 MIL-C-11418H Hydrostatic Test Pressure (psi) 1200 1000 900 600 3.3 Material. Material shall be as specifi
20、ed herein. Materials not specified shall be selected by the contractor and shall be subject to all provisions of this specification. 3.3.1 Material deterioration prevention and control. The repair clamp shall be fabricated from compatible materials, inherently corrosion resistant or treated to provi
21、de protection against the various forms of corrosion and deterioration that may be encountered in any of the applicable operating and storage environments (-25 to +160 OF) to which the repair clamp may be exposed. 3.3.2 Dissimilar metals. Dissimilar metals shall not be used in intimate contact with
22、each other unless protected against galvanic corrosion. Dissimilar metals and methods of protection are defined and detailed in MIL-STD-889. 3.3.3 Identification of materials and finishes. The contractor shall identify the specific material, material finish or treatment for use with component and su
23、bcomponent, and shall make information available upon request to the contracting officer or designated representative. 3.4 Design. The repair clamp shall be designed to fit over the coupling- conforming to MIL-C-10387. clearance of not less than l/i-inch over all parts of the coupling. If a vent hol
24、e is drilled and tapped in to the top portion of the clamp housing, then it must be fitted with a threaded pipe plug. Seals shall be factory installed in their proper position in the repair clamp. Bolts shall be designed to permit tightening of nuts using a 10-inch or 12-inch adjustable wrench witho
25、ut undue interference. The interior of the clamp shall provide a 3.5 Clamp housinp;. The repair clamp housing shall be cast aluminum alloy UNS A 03560 in accordance with ASTM B 26 in the T6 temper, cast ductile iron conforms to ASTM A 536 (grade 65-45-12) or ASTM A 47 (grade 35018) or any other mate
26、rial subject to Government approval. The repair clamp shall be reusable, excluding gasket. 3.6 Pressure ratings. The repair clamps shall seal the applicable pressure specified in table I. The clamp shall not leak when tested with water at the hydrostatic pressures specified in table I. TABLE I. Serv
27、ice Dressure ratings. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-t MIL-C-LLLILH 47 9999906 LO20674 405 MIL-C-11418H 3.7 Seals/gaskets. Gaskets shall be suitable for use with diesel fuels, jet fuels or automotive gasoline. Seals or gaskets shal
28、l be molded from a synthetic rubber compound. The seals and gaskets shall conform to the requirements specified in table II. TABLE II. Physical requirements of the seals/gaskets and correspondinE test methods. Description Original properties Tensile strength, PSI Ultimate elongation, % Hardness, Sho
29、re A Durometer, points After oven aging for 22 hours at 158 OF Tensile strength retained, % min. Elongation retained, % min. Hardness changed, Shore A, points max. Cornpression set, % max. After immersion in ASTM Reference Fuel B for 94 hours at 73.4 OF Tensile strength retained, % min. Elongation r
30、etained, % min. Volume change % After immersion in ASTM Reference Fuel A for 94 hours at 73.4“ F volume change, % Low temperature properties after extraction in Reference Fuel B per ASTM D 471 for 94 hours at 73 OF, dried in air circulating oven at 130 OF for 72 hours and cold conditioning for 94 ho
31、urs at -25 OF. Compression set at 40 % deflection, % max. Torsional stiffness ratio, max. Requirement 1,500 min. 300 min. 60 fO 65 65 f15 50 40 60 -5 to +35 -5 to +15 50 10 3.8 Bolts and nuts. Bolts shall conform to ASTM A 183, ASTM Test Method D 412 D 412 D 2240 D 573 D 573 D 2240 D 395 D 471 D 471
32、 D 471 D 471 D 1229 D 1053 grade 2 or shall be in accordance with ASTM A 193, grade B7. Nuts shall be heavy hexagon type and in conformance with ASTM A 194, grade 2H. Bolts and nuts shall be zinc plated in accordance with ASTM B 633, type II, classification Fe Zn 13. 3.9 Treatment and painting. All
33、exterior surfaces of the clamps except the gaskets, bolts and nuts shall be cleaned, treated and painted in accordance with MIL-T-704, type as applicable. Unless otherwise specified (see 6.2), 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-1
34、1418H 47 m 999990b L020b9.5 341 m - MIL-C-11418H high zinc primer and superior quality enamel top coat, used by the manufacturer of the commercial item, shall be used. The top coat color shall be in accordance with color no. 33446 of FED-STD-595. 3.10 Identification marking. The clamps shall be perm
35、anently identified in accordance with MIL-STD-130. Each body half shall include the appropriate working pressure rating as specified in table I as follows: “Working pressure to psi“ . 3.11 Workmanship. All parts of the clamps shall be free of burrs, sharp edges, or other defects that could impair op
36、eration or serviceability, or be injurious to operating and maintenance personnel. 4. QUALITY ASSURANCE PROVISIONS 4.1 ResDonsibilitv for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examin
37、ations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves t
38、he right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.1.1 ResDonsibility for compliance. All items shall meet all requirements of sections 3 and 5. The inspection set
39、 forth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specificatioh shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the Governme
40、nt for acceptance comply with all requirements of the contract. Sampling inspection, as part of manufacturing operations, is an acceptable practice to ascertain conformance to requirements, however, this does not authorize submission of known defective material, either indicated or actual, nor does
41、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 are manufactured, examined, and tested in accordance with referenced specifications and standards, as applicable. 4.2 Classi
42、fication 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). 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without li
43、cense from IHS-,-,-MIL-C-LLLILBH 47 9999906 LO20696 288 MIL-C-11418H 4.3 First article inspection. 4.3.1 First article examination. The first article repair clamps shall be examined as specified in 4.5.1. Presence of one or more defects shall be cause for rejection. .4.3.2 First article tests. The f
44、irst article repair clamps shall be tested as specified in 4.5.2. Failure of any test shall be cause for rejection. 4.4 ualitv conformance inspection. 4.4.1 Sampling. Sampling for examination and tests shall be in accordance with MIL-STD-105, special inspection level S-1, table I and table IIa. A lo
45、t shall be accepted when O defects are found and rejected when 1 or more defects are found. 4.4.1.1 m. A lot shall consist of all clamps of the same size offered for inspection at one time, not to exceed 150 repair clamps. 4.4.2 Examination. Samples selected in accordance with 4.4.1 shall be examine
46、d for the defects specified in 4.5.1. One or more defects shall be cause for rejection of the lot. 4.4.3 Tests. Samples selected in accordance with 4.4.1 shall be tested as specified in 4.5.2. Failure of any test shall be cause for rejection. 4.5 Inspection procedure. 4.5.1 Examination. The repair c
47、lamps shall be examined as specified herein for the following defects: Major 101. 102 i 103. 104. 105. 106. 107. 108. 109. 110. 111. 112. Materials not as specified (see 3.3). Materials not resistant to corrosion and deterioration, or treated to be resistant to corrosion and deterioration of the app
48、licable storage and operating environments (see 3.3.1). Dissimilar metals as defined in MIL-STD-889 are not effectively insulated from each other (see 3.3.2). Contractor does not have documentation available for identification of materials, material finishes, or treatment (see 3.3.3). Design not as
49、specified (see 3.4). Clamp housing not as specified (see 3.5). Pressure rating not as specified (see 3.6). Seals/gaskets not as specified (see 3.7). Bolts and nuts not as specified (see 3.8). Treatment and painting not as specified (see 3.9). Identification marking not as specified (see 3.10). Workmanship not as specified (see 3.11). 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-LL4LBH
