1、 Comments, suggestions, or questions on this document should be addressed to Defense Logistics Agency Aviation VEB, 8000 Jefferson Davis Highway, Richmond, VA 23297-5616, or e-mailed to STDZNMGTdla.mil. Since contact information can change, you may want to verify the currency of this address informa
2、tion using the ASSIST database at https:/assist.daps.dla.mil/. AMSC N/A FSC 8120 INCH-POUND MIL-DTL-11732F 15 September 2010 SUPERSEDING MIL-DTL-11732E 25 January 1999 DETAIL SPECIFICATION CYLINDER, COMPRESSED GAS: CHLORINE; DOT 3A480 OR DOT 3AA480, GENERAL SPECIFICATION FOR Reactivated after 15 Sep
3、tember 2010 and may be used for new and existing designs and acquisitions. This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers four types of steel cylinders, with valve and cap, intended for chlorine servi
4、ce. 1.2 Classification. The cylinders covered by this specification will be of the following types, as specified (see 6.2). Type I - 20 pounds Type II - 30 pounds Type III - 100 pounds Type IV - 150 pounds Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-
5、,-,-MIL-DTL-11732F 2 1.3 Part or identifying number (PIN). The PIN to be used for gas cylinders acquired to this specification is created as follows: M 11732 - XXX Example of PIN: M11732-20 Cylinder capacity in pounds (see tables I and III) Specification number Denotes military specification 2. APPL
6、ICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made
7、 to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of the documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications and standards. The following specific
8、ations and standards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. FEDERAL SPECIFICATION TT-C-490 - Chemical Conversion Coatings and Pretreatments for Ferrous Surfaces (Base for
9、Organic Coatings) FEDERAL STANDARD FED-STD-H28 - Screw-Thread Standards for Federal Services COMMERCIAL ITEM DESCRIPTIONS A-A-59503 - Nitrogen, Technical A-A-59860 - Valves, Cylinder, Gas (for Compressed or Liquefied Gases) DEPARTMENT OF DEFENSE SPECIFICATION MIL-DTL-17376 - Caps and Flanges, Compre
10、ssed-Gas Cylinder, General Specification for Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-11732F 3 DEPARTMENT OF DEFENSE STANDARD MIL-STD-101 - Color Code for Pipelines and for Compressed Gas Cylinders (Copies of these documents are availa
11、ble online at https:/assist.daps.dla.mil/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other government documents, drawings, and publications. The following other government documents, drawings, and publications form a part of
12、this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation or contract. CODE OF FEDERAL REGULATIONS (CFR) 49 CFR 178.36 - Specification 3A and 3AX Seamless Steel Cylinders 49 CFR 178.37 - Specification 3AA and 3AAX Seamless Steel Cylinder
13、s (Copies of these documents are available online at http:/www.gpoaccess.gov/ecfr/ or from the Superintendent of Documents, P.O. Box 371954, Pittsburgh, PA 15250-7954.) DRAWING NAVY 810-1385867 - Decalcomania, for Navy Gas Cylinders (Copies of drawings required by suppliers in connection with a spec
14、ific procurement function should be obtained from the procuring activity or as directed by the contracting officer.) 2.3 Non-government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are tho
15、se cited in the solicitation or contract. ASTM INTERNATIONAL ASTM D2029 - Standard Test Methods for Water Vapor Content of Electrical Insulating Gases by Measurement of Dew Point (Copies of this document are available from http:/www.astm.org/ or from ASTM International, 100 Barr Harbor Drive, West C
16、onshohocken, PA 19428-2959.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-11732F 4 MASTER PAINTERS INSTITUTE MPI #9 - Alkyd, Exterior Gloss (MPI Gloss Level 6) (Copies of this document are available online at http:/ or from Master Painters
17、 Institute, 2800 Ingleton Avenue, Burnaby, BC V5C 6G7 Canada.) SSPC: THE SOCIETY FOR PROTECTIVE COATINGS SSPC-Paint 25 - Zinc Oxide, Alkyd, Linseed Oil Primer for Use Over Hand Cleaned Steel Type I and Type II SSPC-SP 5 - White Metal Blast Cleaning SSPC-SP 6 - Commercial Blast Cleaning SSPC-SP 10 -
18、Near-White Metal Blast Cleaning (Copies of these documents are available online at http:/www.sspc.org/ or from SSPC: The Society for Protective Coatings, 40 24th Street, Sixth Floor, Pittsburgh, PA 15222.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a c
19、onflict 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 regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Configuration. Cylinders shall confo
20、rm to the requirements of 49 CFR 178.36 for DOT 3A or 49 CFR 178.37 for DOT 3AA, and shall be as specified herein. 3.1.1 Cylinders. The cylinder shall be as specified in table I. All dimensions are in inches. The tolerance for outside diameter (OD) is 0.5 inch and that for height is 2 inches. TABLE
21、I. Cylinder configuration. Outside dimensions Type Nominal gas capacity (pounds) OD (inches) Height (inches) Min. water capacity (pounds) Max. tare weight (pounds) I 20 6 19 16 25 II 30 6 29 24 35 III 100 8.5 48 80 85 IV 150 10.25 48 120 120 3.1.2 Flanges, valves, and caps. The cylinder shall be sup
22、plied with flanges, valves and cap in accordance with 3.4 and figure 1. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-11732F 5 FIGURE 1. Cylinder configuration. 3.1.3 Bottom design. The bottom design shall be bumped back or shall be designe
23、d with a foot ring for upright stability. Footrings, when used, shall have a minimum of two ventilation holes and two drainage holes equally spaced. 3.2 Construction. Cylinders shall be true of form and shall be stable when in an upright position. The neck of each cylinder shall be tapped internally
24、 with National Gas Taper (NGT) threads: 3/4-14 NGT (Cl)-1. Threads shall conform to FED-STD-H28. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-11732F 6 3.3 Cylinder processing. 3.3.1 Internal surfaces. The internal surfaces of drawn cylinde
25、rs, prior to necking, shall be free of mill scale, burrs, oxidation products and all foreign matter. When required, only iron-based abrasives shall be used to remove unstable surfaces or oxidation products from the cylinder wall. Metal discoloration, rust bloom, and fixed scale shall not be consider
26、ed criteria for cylinder rejection. 3.3.2 Cylinder cleaning. After necking, drilling, threading, and deburring, the cylinders shall be cleared of loose particles by vacuum or by inverting the cylinder and applying a compressed air sweep (see 6.3). The cylinder shall be flushed with hot fluids when n
27、ecessary to remove grease, oil, and fat from processing. Chemicals that will react with chlorine shall not be used. 3.3.3 Cylinder drying. Internal cylinder moisture, from processing or hydrostatic testing, shall be removed by inverting and steaming the surfaces until hot to the touch, followed by d
28、rying with filtered air having a dew point less than 30 F until the dew point of effluent gas is less than 40 F when tested in accordance with ASTM D2029 or by equivalent method. In lieu of filtered air, drying by suction of ambient air through the cylinder is allowed. The residual air in the dry cy
29、linder shall be replaced by introducing dry nitrogen gas conforming to A-A-59503, type I, grade B, through a bayonet extending to the bottom end of the cylinder. Closure shall be carried out immediately to limit atmospheric interchange. 3.4 Closure. Cylinders shall be equipped with a flange and a ca
30、p conforming to MIL-DTL-17376. A plug or closed valve conforming to A-A-59860, as specified, shall be installed in the neck of the cylinder (see 6.2). 3.5 Tare weight. The tare weight of the cylinder shall be the weight of the cylinder, flange, and valve, but exclude the valve protection cap. The ta
31、re weight shall be expressed in pounds and ounces expressed in 4-ounce increments to the nearest quarter-pound. The figures expressing pounds shall be separated from the figures expressing ounces by a dash (-). Example: A tare weight marking of “119-4“ indicates a weight of 119 pounds, 4 ounces. 3.6
32、 Test date. The cylinders shall be delivered within 1 year of the test date stamped on the cylinder. 3.7 Cylinder identification. Marking shall be in characters not less than 0.25 inch in height. 3.7.1 Standard markings. Standard markings shall be plainly and permanently marked by stamping on the sh
33、oulder of each cylinder starting near the neck as follows: a. “DOT-3A480“ or “DOT-3AA480“ in characters not less than 0.375 inch in height for cylinders greater than 6 inches in outside diameter. b. Serial number (see 6.5), as registered with the Bureau of Explosives, in characters not less than 0.5
34、 inch in height for cylinders greater than 6 inches in outside diameter. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-11732F 7 c. “US GOVT“, Government symbol, as registered with the Bureau of Explosives, in characters not less than 0.5 in
35、ch in height for cylinders greater than 6 inches in outside diameter. d. The inspectors official mark. e. Date of test, stamped diametrically opposite the above marking. f. Manufacturers or re-testers mark, near the date of test (preferably right above it). g. The tare weight shall be stamped in a p
36、osition other than in sequence with the serial number or test date, and preceded by the letters TW. 3.7.2 Additional markings. In addition to the above markings, the cylinders shall bear the following markings: a. The name of the gas, stenciled on the cylinder in accordance with MIL-STD-101. b. When
37、 specified (see 6.2), two decals conforming to drawing 810-1385867 shall be affixed diametrically opposite to one another, on the sides of the cylinder, 90 degrees from the stenciled name of the gas. 3.8 Treatment and painting. 3.8.1 Cleaning. Each cylinder and cap shall be cleaned in accordance wit
38、h TT-C-490. Cleaning may be accomplished by: a. Chemical methods such as solvent cleaning, alkaline cleaning, acid cleaning, pickling, descaling with hydride, or paint stripping; or, b. Electrochemical cleaning methods such as electrolyte alkaline, electro-polishing, or electrolytic pickling; or, c.
39、 Mechanical means such as blasting, chipping, wire brushing, or grinding. 3.8.1.1 Blasting. Where blasting is appropriate, blast in accordance with SSPC-SP 6, unless SSPC-SP 5 or SSPC-SP 10 is specified (see 6.2). Blasting shall not be used on surfaces that could be damaged by blasting or on compone
40、nts containing such surfaces unless protective masking has been applied. 3.8.2 Treatment. Cylinders shall be treated as soon as possible after cleaning, as specified in 3.8.1, with a zinc phosphate chemical conversion coating in accordance with TT-C-490, type I. 3.8.3 Painting. Coatings shall be app
41、lied in an ambient temperature of not less than 50 F and not more than 90 F. Paint shall be applied by any method that will deposit the specified film coat thickness and comply with any applicable transfer efficiency regulations. Paint and surface shall be approximately the same temperature except w
42、hen hot spray is used. 3.8.3.1 Bottom coating. Calcium sulfonate coating, such as Watson Armor Shield or an equivalent, shall be applied to each dry, clean cylinder bottom and footring, when applicable, as soon as practicable after cleaning and treatment (see 3.8.1 and 3.8.2). Dry film thickness of
43、the bottom coating shall be 3.0 to 7.0 one-thousandth of an inch (mil). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-11732F 8 3.8.3.2 Primer. Primer conforming to SSPC-Paint 25 shall be applied to each dry, clean cylinder as soon as practi
44、cable after cleaning, treatment, and bottom coating (see 3.8.1, 3.8.2, and 3.8.3.1). Dry film thickness of the primer shall be 0.7 to 1.0 mil. 3.8.3.3 Finishing coat. Finishing coat conforming to MPI #9 shall be applied to each cylinder. The color of the finishing coat shall conform to the cylinder
45、color code requirement of MIL-STD-101. Dry film thickness of the finishing coat shall be 1.0 to 1.5 mils. 3.9 Workmanship. Cylinder, valve, plug, flange, and cap shall be clean and free from grit and loose scale. Edges shall be rounded or chamfered. The cylinder shall be cleaned and free of other su
46、rface defects detrimental to the intended use. 4. VERIFICATION 4.1 Classification of inspection. The inspection requirements specified herein are classified as conformance inspection. 4.2 Conformance inspection. 4.2.1 Examination. Each cylinder shall be examined for defects as listed in table II. TA
47、BLE II. Processing defects. Defect code Defect Requirement paragraph 101 Cylinder not in accordance with 49 CFR 178.36 for DOT 3A cylinder or 49 CFR 178.37 for DOT 3AA cylinder3.1 102 Dimensions not as specified 3.1.1 103 Construction not as specified 3.2 104 Cleaning and drying not as specified 3.3
48、.2, 3.3.3 105 Cylinders not purged with nitrogen 3.3.3 106 Closure not as specified 3.4 107 Tare weight not as specified 3.5 108 Test date more than one year prior to the date of acceptance by the Government 3.6 109 Marking not as specified 3.7 110 Treatment and painting not as specified 3.8 111 Wor
49、kmanship not as specified 3.9 4.2.2 Tests. Cylinder testing shall be in accordance with the requirements described in 49 CFR 178.36 for DOT 3A or 49 CFR 178.37 for DOT 3AA cylinders (see 3.1). All tests shall be completed within the one-year period prior to the date of acceptance by the Government. Provided by IHSNot for ResaleNo reproduction or networking per
