1、MIL-G-24716A 9999906 1855072 942 I INCH - POUND I MIL-G-24716A(SH) 5 April 1993 SUPERSEDING 10 May 1989 MIL-G-24716(SH) MILITARY SPECIFICATION GASKETS, METALLIC-FLEXIBLE GRAPHITE, SPIRAL WOUND This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is ava
2、ilable for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 ScoDe. This specification covers spiral wound metallic-flexible graphite gaskets for use in both pipe line joints and other applications where pressure and temperature conditions do not exceed 2500 pounds per s
3、quare inch (psi) and 1050 degrees Fahrenheit (“F). 1.2 Classification. 1.2.1 Part or identifvinv number (PIN). The PIN for the gaskets covered by this specification shall consist of a general prefix followed by a specific design designator. The prefix shall consist of the letter “M“, the basic numbe
4、r of this specification and an indication of the gasket type (“TYI“ for type I and “TY2“ for type II). a Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, ATTN: SEA 05442, Naval Sea Sys
5、tems Command, 2531 Jefferson Davis Hwy., Arlington, VA 22242-5160 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 5330 e DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provid
6、ed by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. For type I gaskets the design designator shall consist of a CAGE number, a drawing number and an item number. Where a Government issued drawing exists which specifies the gasket (class, dimensions and compr
7、ession characteristics) the Government CAGE, drawing and item numbers, separated by dashes, I-“ , shall be used. Where no adequate Government drawing exists, the manufacturers CAGE number and drawing and item numbers (or manufacturers part number) may be used. For type II gaskets the design designat
8、or shall consist of the Class, Size, Pressure Rating Series and Metal Outer Ring Finish as shown in the following example: TvDe II SDiral Wound Gasket M 24716 TY 2 CL B 1.25 NPS 1500 PSI CRES Basic number of specification Class (see 1.2.1.2) (A, B or C) r Size L Pressure Rating Series Metal outer ri
9、ng finish Type (see 1.2.1.1) (see 1.2.1.3) (see 1.2.1.1) (see 1.2.1.4) 1.2.1.1 Gasket Tvpe and Series. Gaskets shall be of the following type and pressure rating series as specified (see 6.2). Type I - Gaskets for applications other than pipeline flange joints (TYI) such as valve bonnets, pumps and
10、other equipment applications, (This specification does not apply to gaskets for boiler manholes and handholes which are seated by internal pressure.) Type II - Gaskets for ANSI B16.5 pipeline flange joints with metal outer rings (TY2). Series 150, 300, 400, 600, 900, 1500, and 2500 (PSI) gasket char
11、acteristics are defined in tables I through V. 1.2.1.2 Gasket Class. Gaskets shall be of the following classes (see 3.2 and 6.2): Class A - Corrosion-resistant steel (for temperatures up to 1050F max.) Class B - Nickel-chromium iron alloy (for temperatures up to 900F max.) Class C - Nickel-copper al
12、loy (for temperatures up to 700F where contact (CM) (CD) with sea water is possible). (CLC) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-247LbA 999990b L855074 7L5 W 1.2.1.3 Gasket Size. For type II gaskets, the size shall be identified by
13、 the associated pipe NPS. The corresponding NPS and actual dimensions of the gaskets can be obtained from tables I through V. Type I gasket dimensions are specified by the contracting activity. 1.2.1.4 Metal outer rine finish. For type II gaskets, the metal outer ring material and finish options (se
14、e 3.2.2) shall be identified as follows: Code Metal outer rinp material/finish CRPL Carbon steel ring/chromium plated CRES Corrosion resistant material, as specified, ring/ UNC Carbon steel ring/uncoated REF No metal outer ring uncoated Blank Carbon steel ring/vendor coating option NOTE: “CRES“ meta
15、l outer rings may be provided in lieu of “CRPL“ metal outer rings at the manufacturers option. “CRES“ metal outer rings may be substituted for “CRPL“ metal outer rings in service. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 SDecifications and standards. The following specifications and s
16、tandards form a part of this document 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). SPECI
17、FICATIONS FEDERAL QQ-N-281 - Nickel-Copper-Alloy Bar, Plate, Rod, Sheet, Strip, Wire, Forgings and Structural and Special Shaped Sections. QQ-C-320 - Chromium Plating (Electrodeposited). PPP-F-320 - Fiberboard, Corrugated and Solid, Sheet Stock (Container Grade), and Cut Shapes. MILITARY MIL-L-19140
18、 - Lumber and Plywood, Fire Retardant Treated. MIL-P-24503 - Packing Material, Graphitic, Corrugated Ribbon or Textured Tape and Preformed Ring. STANDARD MILITARY MIL-STD-2073-1 - DOD Material Procedures for Developrnent.and Application of Packaging Requirements. 3 Provided by IHSNot for ResaleNo re
19、production or networking permitted without license from IHS-,-,-MIL-G-247LbA m 9999906 L855075 b5L MIL-G-24716A(SH) (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Bldg. 4D, 700 Robbins
20、Avenue, Philadelphia, PA 19111-5094.) 2.2 Non-Government Publications. The following documents 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 solicita
21、tion. Unless otherwise specified, the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN NATIONAL STANDARDS INSTITUTE, INC. (ANSI) 816.5 - Pipe Flanges and Flanged Fittings. (Application for copies should be addressed to the Ame
22、rican National Standards Institute, Inc., 1430 Broadway, New York, NY 10018.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) A 167 - Standard Specification for Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip. (DOD adopted) B 127 - Standard Specification for Nickel-Coppe
23、r Alloy (UNS N04400) Plate, Sheet, and Strip. (DOD adopted) B 168 - Standard Specification for Nickel-Chromium-Iron Alloys (UNS NO6600 and N06690) Plate, Sheet, and Strip. (DOD adopted) D 3951 - Standard Practice for Commercial Packaging. (DOD adopted) (Application for copies should be addressed to
24、the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME) Boiler and Pressure Vessel Code. Section VI11 - Pressure Vessels. (Application for copies should be addressed to the American Society of Mechanical Engineers, 34
25、5 E. 47th Street, New York, NY 10017.) (Nongovernment standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informational services.) 2.3 Order of Drecedence. In t
26、he event of a conflict between the text of this document and the references cited herein (except for related associated detail specifications, specification sheets or MS standards), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulati
27、ons unless a specific exemption has been obtained. 3. REQUIREMENTS 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-2471bA 99999Ob 185507b 598 3.1 Desien. Spiral wound gaskets furnished under this specification shall be specified. either type
28、I or type II designs and shall be suitable for the service conditions 3.1.1 TYDe I gaskets. Type I gaskets shall be either restricted or unrestricted compression designs and shall be compatible with the specific flange design. Type I gaskets shall have an uncompressed thickness of either O. 125 k 0.
29、005 inch or 0.175 f 0.005 inch as specified by the contracting activity (see 6.2). (The gasket thickness measurement applies to the metallic strip portion of the gasket and does not include the filler material which may protrude slightly.) Unless otherwise specified, type I gaskets shall not be supp
30、lied with outside or inside metal rings. 3.1.1.1 Restricted compression flange design. Gaskets shall be capable of being compressed to the specified thickness as determined by the joint dimensions by a compressive load range as specified by the equipment manufacturer. Since type I gaskets are specia
31、l gaskets for specific components such as valve bonnet joint, and so forth, the contracting activity shall obtain the compression load information from the component drawing or the equipment manufacturer. In those cases where this information cannot be obtained the following design criteria may be u
32、tilized if desired for acquisition of the gaskets. Gaskets shall be designed in accordance with minimum design seating stress as defined in the ASME Boiler and Pressure Vessel Code, Section VI11 utilizing the formula W, = 3.14 b G y. 3.1.1.2 Unrestricted compression flange design. - Unless otherwise
33、 specified by the original equipment manufacturer, gaskets shall be capable of being compressed to O. 130 f O. 005 inch for gaskets having an original thickness of O. 175 or to O. 100 inch f 0,005 inch for gaskets having an original thickness of 0.125 inch at a compression load specified by the equi
34、pment manufacturer. If compression load information specified in 3.1.1.1 is not available, the contracting activity may specify the gasket be designed in accordance with the minimum seating stress tdefined in the ASME Boiler and Pressure Vessel Code, Section VIII. 3.1.1.3 Exemption from cornDression
35、 test. If approved by the contracting activity, gaskets requiring a total compressive force in excess of 557,000 pounds may be exempted from the compression test requirement, since the compression load is in excess of the .capacity of commonly available testing machines. If enough is known ab,out su
36、ch a gasket, an alternate compression test may be performed by spe.kifying a required thickness range when compressed to 550,000 pounds (see 6.2). 3.1.2 TYD II. Type II gaskets shall be compatible with the ANSI B16.5 pipeline flange specified. Type 11 gaskets shall consist of a refill snapped in a s
37、olid metal outer ring (see 3.1.2.2) with a sliding fit. The design shall be such that the gasket can be compressed without damage to 0.117 inch thickness. The gaskets shall conform to tables I through V. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-
38、,-,-NIL-G-2471bA D 99999Ob 1855077 424 MIL-G-24716A(SH) TABLE I. TvDe II Basket characteristics for series 150 psi ANSI flanges. NPS Inches v4 1/2 3/4 1 1 - 1/4 1-1/2 2 2 - 1/2 3 3 - 1/2 4 5 6 8 10 12 14 0.d. 16 0.d. Pipe 0.d. Inches O. 540 O. 840 1.050 1.315 1.660 1.900 2.375 2.875 3.500 4.000 4.50
39、0 5.563 6.625 8.625 10.750 12.750 14.000 16.000 r Gasket refills (see figure 1) I .d. Inches5 1/2 3/4 1 1 - 1/4 1-23/32 2 - 1/8 2 - 3/4 3 - 1/8 4 4- 1/2 5 6 - 1/8 7 - 3/16 9 - 3/16 11 - 5/16 13 - 3/8 14 - 5/8 16 - 5/8 c “ 0.d. Inches 27/32 1-7/32 1 - 17/32 1- 27/32 2- 11/32 2 - 23/32 3 - 11/32 3 - 2
40、7/32 4-23/32 5 - 7/32 5 - 27/32 6-31/32 8-7/32 LO-11/32 12-15/32 14-23/32 L5 - 31/32 L8 - 7/32 Number of plies Metal2 Inside ?eriphery t1/2 turn - 6 6 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 lutside periphery 1/2 turn J Neither outside ditheter (0.d.) dimension nor outside periphery plies includes additional
41、unwelded plies (see 3.3.1.1(a). - 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 Metal outer ring .d. Inches 1- 3/4 1 - 7/8 2 - 1/4 2 - 5/8 3 4- 1/8 4-7/8 5 - 3/8 6 - 3/8 6- 7/8 3 - 318 7 - 3/4 8 - 3/4 L1 L3 - 3/8 L6 - 1/8 L7 - 3/4 20 - 1/4 te5t4 load Founds 12,600 12,600 12,600 12,600 15,100 15,100 24,200 24,20
42、0 24,200 48,500 48,500 72,500 72,500 72,500 -51,001 .51,000 -98,000 !64,000 2/ There shall be no flexible graphite plies- between the metal plies on the inside and on the autside periphery. 3r/ Toleralnce plus or minus 1/32 inch for sizes up to 8 inches iron pipe size (ips) and plus or minus 1/16 in
43、ch for sizes over 8 inches nps. 4/ Correspdnds to boiting loads of 30,000 psi f O percent unit stress, except for gasket sizes 1 inch and smaller, which are based upon unit bolt stress of 25,000 psi at thread root area. When under this compressive test load, the gasket thickness shall be 0.130 f 0.0
44、05 inch. Tolerance plus or minus 1/64 inch on the inside diameter (i.d.) and plus 1/16, minus 1/32 inch on the 0.d. 6 , Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-2471bA 9 9999906 I1855078 3b0 MIL-G-24716A(SH) al v) 4 d W H 5 O O a a 4 O O
45、 d O O m v) al *d : al v) al .d o ddddd d alooomoommoooommmooooo a cddmdobbooooaNNmmooo a, vmaomamamomoaabbooo v c, v) . HOOddrldNNmddmmaaONfWcc) 4 .;i 0 EO 4 v) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-247LbA m 999990b L855079 2T7 m MIL
46、-G-24716A(SH) 1 000000 000000 I 000000 I .d U G 5 f I I v) alo I I aaaaawa UN o .d U VIa M 4 ala 52 Xd50 al ac Uk VI0 drl 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. 00000000000 00000000000 a6lmmdoooooo d cdc U4 oa W dd a mn H I A m 9 Provide
47、d by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-d J .5 H OE Q). aa 4. 040 0000000000 0000000000 I I I I hlm101d0600000 I I I I 10 a O o) s g % C .r( m hl 2 3 C e .d W d d 3 d a a C (d a Provided by IHSNot for ResaleNo reproduction or networking permitted wi
48、thout license from IHS-,-,-MIL-G-247LbA 999990b L855082 891 3.1.2.1 Refills for all series of tvpe II easkets. Refills shall be of the inside and outside dimensions specified in tables I through V. Type II gasket (The initial gasket thickness measurement applies to the metallic strip portion of the
49、gasket and does not include the filler material which may protrude slightly.) refills shall have an initial uncompressed thickness of O. 175 f 0.005 inch. 3.1.2.2 Metal outer ring. The metal outer ring shall have a thickness of 0.125 + 0.006/-0.008 inch. The ring shall have a V-shaped groove or other satisfactory retaining feature machined on the inside periphe
