1、A-A-59860 2 February 201 0 SUPERSEDING MIL-DTL-2G 29 September 2006 COMMERCIAL ITEM DESCRIPTION VALVES, CYLINDER, GAS (FOR COMPRESSED OR LIQUEFIED GASES) The General Services Administration has authorized the use of this commercial item description for all federal agencies. 1. SCOPE. This commercial
2、 item description (CID) provides the acquisition requirements for the purchase of cylinder valves for use with compressed gas cylinders containing liquefied or non-liquefied compressed gases or mixtures. 2. CLASSIFICATION. The valves shall be classified by the following styles, classes, outlet conne
3、ction numbers, and inlet sizes: 2.1 m. The valve shall be one of the styles listed below (see 7.3(c). Style I - Compression packed. Style IIA - O-ring (low-pressure*). Style SIB - O-ring (high-pressure). Style IV - Diaphragm seal. Style V - Medical post. *Style IIA low-pressure O-ring valves are rat
4、ed up to 500 psig. A style IIB high-pressure O-ring valve, of the appropriate class (see 2.2), is required for applications using an O-ring valve, where the cylinders marked operating pressure exceeds 500 psig. 2.2 Class. The valve shall be one of the classes listed in table I (see 7.3(d). Beneficia
5、l comments, recommendations, additions, deletions, clarifications, etc. and any data that may improve this document should be sent to: STDZNMGT,dla.mil or Defense Supply Center Richmond SCR), ATTN: DSCR-VEB, 8000 Jefferson Davis Highway, Richmond, VA 23297-5616. Since contact information can change,
6、 you may want to verify the currency of this address information using the ASSIST database at htts:/assist.das.dla.mili. FSC 8120 Provided by IHSNot for Resale-,-,-TABLE I. Class designations. I Class I Valve design service pressure1 I Max. marked cylinder I The pressure rating of the outlet connect
7、ion as specified in CGA V-1. 05 30 40 55 75 2.3 Outlet connection numbers. The valve outlet shall be one of the following designations, as specified in CGA V-1, “Standard for Compressed Gas Cylinder Valve Outlet and Inlet Connections“, (see 7.3(e): 2.4 Inlet sizes. The valve inlets size shall be one
8、 of the following sizes as specified in CGA V-I (see 7.3(t): - rating (psig) 0-500at70F(21.1 C) 0 - 3000 at 120 “F (48.9 “C) 3001 - 4000 at 120 “F (48.9 OC) 4001 - 5500 at 120 “F (48.9 “C) 5501 - 7500 at 120 “F (48.9 OC) Inlet size 3 - 318-18NGT. Inlet size 4 - 112-14NGT. Inlet size 6 - 314-14NGT. I
9、nlet size 8 - 1-1 1 112-NGT. service pressure (psig) 500 (3450Wa) 2400 (16550 Ha) 3000 (20680 kPa) 3600 (24820 Wa) 6000 (41370 Wa) 3. SALIENT CHARACTERISTICS 3.1 Design and construction requirements. The valves design and construction shall be in accordance with CGA V-9, “Compressed Gas Association
10、Standard for Compressed Gas Cylinder Valves“. 3.1.1 Materials. As specified in CGA V-9, all materials in contact with the gas shall be physically and chemically compatible with the products for which the valve is designed. 3.1.1.1 Comuonents. Used, rebuilt or remanufactured components, pieces, and p
11、arts shall not be incorporated in the valves. 3.2 Performance requirements. The valves performance shall be in accordance with the performance requirements specified in CGA V-9. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS3.3 Marking. Unless otherwise
12、 specified, valves shall be marked in accordance with CGA V-9 (see 7.3 (g). In addition, when specified by contract, the valve body shall be permanently marked, using one of the methods specified in CGA V-9, with the appropriate nomenclature to indicate the valves intended gas service. The contracti
13、ng agent shall provide the required nomenclature. 3.4 Pressure relief device. Unless prohibited or not required (see tables I1 and III), all valves shall be supplied with a safety device known as a pressure relief device (PRD). This safety device shall be one of the types listed in table IS, and con
14、form to the design and performance requirements specified in CGA S-1.1, “Pressure Relief Device Standards Part 1 - Cylinders for Compressed Gases“, and CGA S-7, “Method for Selecting Pressure Relief Devices for Compressed Gas Mixtures in Cylinders“, (see 7.3(h). TABLE 11. PRD designations. I PRD# (
15、CGAS-1.1 I Type and description 10 1 I Prohibited 11 I CG-2 I Fusible plug PRD for service (cylinder) pressures through 500 psig 1 (3450 kPajf165 “F (74 “Cj nominal 12 1 CG-3 I Fusible lug PRD for service fcvlinderl oressures through 500 osi , -. . , . - . - I (3450 kPaj, 212 - 1. (100 C) torninal C
16、G-4 I Cotnbination rupture disk anJ litjiblc plug PRD ior servi (c! lindcr) preitrch of 1800 psig (12400 kPa) through 2265 Gig (15616 kPa), 165 “F (74 “C) 14 CG-5 Combination rupture disk and fusible plug PRD for service (cylinder) pressures I of 1800 psig (12400 kPa) through 2265 Gig (15616 kPa), 2
17、12 “F (100 “C) 15 1 CG-7 I Spring loaded, reseating -ervice (cylinder) pressure 225 psig The use of PRDs is prohibited in certain gas senice applications by 49 CFR 173.301. A spring loaded, reseating PRD (CG-7) is also known as a pressure relief valve (PRV) Provided by IHSNot for Resale-,-,-3.5 Test
18、ing and inspections. Unless otherwise specified, the valves shall pass all qualification tests and inspections as specified in CGA V-9. Documentation of these tests shall be maintained in accordance with CGA V-9 and made available to the government upon request. When specified by contract, represent
19、ative valves shall be required to pass the optional vibration test specified in CGA V-9 (see 7.3u). When specified (see 7.3(k), representative valves shall be required to pass additional endurance testing, up to 5,000 total cycles, conforming to the endurance test method specified in CGA V-9. 4. REG
20、ULATORY REQUIREMENTS 1.1 Krco crcd macrials. 1 he ollcror/contractor is cncouracd to usc rccovercd materials to the maximum extent practicable. in ;ccorJance nith paragaph 23.103 of the 1:eieral .Acquisition Regulation (FAR). 5. PRODUCT CONFORMANCE PROVISIONS 5.1 Product conformance. The products pr
21、ovided shall meet the salient characteristics of this CID, conform to the producers own drawings, specifications, standards, and quality assurance practices, and be the same product offered fir sale in the commercial marketpiace. ma he government reserves the right to require proof of such conforman
22、ce, and to perform, at its own expense, those additional inspections, tests and other evaluations the contracting agency deems necessary. 5.2 Market acceptability. The product offered must have been previously sold either to the government or on the commercial market. 6. PACKAGING 6.1 Preservation,
23、packing. and marking. Preservation, packing, and marking shall be as specified in the contract or order (see 7.3(1). 7. NOTES 7.1 Part or identification number (PIN). The following PIN procedure is for government purposes and does not constitute a requirement for the contractor. A.459860 - XXX / -L
24、See table 111 CID number Example reference part number AA59860- 001 indicates: MIL-DTL-2G designator V1-510-0, outlet app. 510, inlet size 6, style I, class 05, PRD designator 0, for acetylene gas, which may require a wrench or key and a strainer. Provided by IHSNot for ResaleNo reproduction or netw
25、orking permitted without license from IHS7.2 Sources of documents. 7.2.1 CFR and FAR. Copies of CFR and FAR may be obtained from the Superintendent of Documents, P.O. Box 371954, Pittsburgh, PA 15250-7954. Electronic copies of CFR documents may be obtained from htt:/www.oaccess.gov/cfr/. Electronic
26、copies of FAR documents may be obtained from http:/www.amet.gov/far/. 7.2.2 CGA standards. Copies of CGA standards may be obtained from the Compressed Gas Association, 4221 Walney Road, 5th Floor, Cbantilly, VA 20151-2923. Electronic copies of CGA standards may be obtained from http:/ 7.3 Ordering d
27、ata. The acquisition order should specify the following information: a. CID document number, revision, and CID PIN (see table Ill). b. Intended gas service. c. Valve style (see 2.1). d. Maximum marked cylinder service pressure (see table I). e. Outlet connection number (see 2.3). f. Inlet size (see
28、2.4). g. When valve body marking shall be other than specified by CGA V-9 (see 3.3). b. PRD type (see 3.4). i. When the spring tension adjustment for a PRD is required to be different than that normally specified (see table 11). j. When the optional vibration testing specified in CGA V-9 is required
29、 (see 3.5). k. When additional endurance testing (5,000 cycles) is required (see 3.5). 1. Preservation, packing, and marking (see 6.1). m. Cylinder diameter or actual dip tube length when a dip tube is required (see table 111). n. When dip tube is required to be assembled to valve (see table 111). o
30、. When a metal outlet cap or plug, with chain and retaining ring is required or when a disposable plastic dust cap or plug is required (see table 111). Note: All valves (with non-pin indexed outlets) may require a cap or plug. p. When a handwheel is not required (see table 111). q. When a wrench or
31、key is required (see table 111). r. When a strainer is required (see table 111). s. When chrome plated valves are not required for medical valve applications (see table 111). Provided by IHSNot for Resale-,-,-7.4 Subiect term (key word) listing. Compression packed Diaphragm seal Dip tube Eductor tub
32、e Fusible plug Inlet Outlet Pressure relief device Rupture disk Medical O-ring 7.5 Cross-reference data. Table 111 contains cross-reference data for valves previously specified by MIL-DTL-2G and its associated specification sheets, including the individual specification sheet numbers and valve type
33、designators. This information has been included for continuity and to facilitate the transition to this document. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHSProvided by IHSNot for Resale-,-,-TABLE 111. PW desirnation and cross-reference data for valv
34、es - Continued. 1 CIDPTN 1 Formerdetd I MU-DTL-2G I Outlet I Met I SNle I Cl-s / PRD I DT I DC I WK3 I Gar remce I Remxko 1 or-2, -3.4, -5 optional: outlet or-2, -3,4, -5 0p“onai; ode R-72 Tnflvarmdune R-31 chlarofluoromefhao* R-32 Dfluormduno R-I13 T“lnchioraMuoro but if a PRD is used, it shall be
35、a CG-4 (FRD t13). “ The PRE for this valve depends on the composition of the corrosive (acidic or basic) mixhlre. It shall be in accordance with CGA S-7, CGA S1.1, and 49 CFR “Transportation“, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHSMILITARY INTER
36、ESTS: Custodians: Army -AT Navy - SH Air Force - 68 DLA - GS Review Activities: Army - AV Navy - AS, MC CIVIL. AGENCY COORDINATING ACTIVITY: GSA - FAS Preparing Activity: DLA - GS7 (Project 8120-2009-005) NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST database at https:/assist.das.dla.mil/. Provided by IHSNot for Resale-,-,-
