1、 Reference numberISO/TS 3669-2:2007(E)ISO 2007TECHNICAL SPECIFICATION ISO/TS3669-2First edition2007-09-01Vacuum technology Bakable flanges Part 2: Dimensions of knife-edge flanges Technique du vide Brides tuvables Partie 2: Dimensions des brides guillotine ISO/TS 3669-2:2007(E) PDF disclaimer This P
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11、cument: an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in an ISO working group and is accepted for publication if it is approved by more than 50 % of the members of the parent committee casting a vote; an ISO Technical Specification (ISO/TS) repre
12、sents an agreement between the members of a technical committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting a vote. An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a further three years, revis
13、ed to become an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is confirmed, it is reviewed again after a further three years, at which time it must either be transformed into an International Standard or be withdrawn. Attention is drawn to the possibility that some of the elements o
14、f this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO/TS 3669-2 was prepared by Technical Committee ISO/TC 112, Vacuum technology. ISO 3669 consists of the following parts, under the general title Vacuum technology B
15、akable flanges: Dimensions Part 2: Dimensions of knife-edge flanges Technical Specification ISO/TS 3669-2:2007(E) iv ISO 2007 All rights reservedIntroduction This Technical Specification contains significant technical changes from ISO 3669:1986, which defined two series of bakable flanges: a preferr
16、ed series, the main dimensions of which ensure compatibility with already standardized non-bakable flanges (see ISO 1609); a secondary series corresponding to flanges in common use. This part of ISO 3669 specifies only one series and is no longer dependent on the preferred number. Effectively, the p
17、referred series has been made obsolete, thereby promoting the secondary series into being the one and only set of specified dimensions. Furthermore, several dimensions in what was formerly the secondary series have been modified to correspond to flanges in common use. Finally, detailed dimensions fo
18、r the knife-edge sealing profile have been incorporated. TECHNICAL SPECIFICATION ISO/TS 3669-2:2007(E) ISO 2007 All rights reserved 1Vacuum technology Bakable flanges Part 2: Dimensions of knife-edge flanges 1 Scope This part of ISO 3669 specifies the dimensions of fixed or rotatable bolted knife-ed
19、ge style bakable flanges used in vacuum systems for pressures ranging from atmospheric to as low as 1013Pa. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 knife-edge style flange metal sealed flange used for high and ultra-high vacuum servic
20、e NOTE 1 The sandwiching of one metal gasket between two knife-edge flanges and securely bolting these together makes a vacuum-tight joint. The seal is made when the conical knife edge profile of the flange cuts into the flat surface of a metal gasket. NOTE 2 Originally developed as Conflat1)flanges
21、. The widespread and continued use of knife-edge flanges has made these a de facto international standard, codified by this Technical Specification. 2.2 nominal bore value intended to both identify the flange and specify the largest practical size of tubing that can be accommodated by the flange NOT
22、E See Table 1, in which the convention of identifying original flanges by the outside diameter of the flange (historically in inches) has been maintained. 2.3 leak check groove groove machined into the seal side of the flange to facilitate the free passage of search gas from the outer perimeter of t
23、he flange to the seal zone near the metal gasket 1) Conflat is the trade name of a product supplied by Varian Corporation. This information is given for the convenience of users of this Technical Specification and does not constitute an endorsement by ISO of the product named. Equivalent products ma
24、y be used if they can be shown to lead to the same results. ISO/TS 3669-2:2007(E) 2 ISO 2007 All rights reserved3 Symbols Symbol Description Unit l1nominal outside diameter of flange mm (in) l2max. tube mm (in) l3bolt hole mm (in) l4bolt circle mm (in) position tolerance of bolt hole centre mm l5sea
25、l recess mm (in) l6knife edge mm (in) l7thickness of inner rotatable ring mm (in) l8depth of pipe connection mm (in) l9flange thickness mm (in) l11outside diameter of metal gasket mm (in) 4 Requirements 4.1 Materials 4.1.1 Flange The selection of the material shall be compatible with the requirement
26、s for the flanges. Considerations may include service temperature, sealing capacity, corrosion resistance, magnetic permeability, type of seal gasket used and dimensions. NOTE Austenitic stainless steel is commonly used, but it is not the intent of this part of ISO 3669 to specify or limit the choic
27、e of flange material to austenitic stainless steel. 4.1.2 Bolt holes The flange may have either clearance or tapped bolt holes. NOTE As a number of flanges in use currently originated in the United States, the tapped flanges often have English tapped holes. Of increasing use are flanges with metric
28、threads. Both are presented in this part of ISO 3669 (see Table 1). 4.1.3 Grooves Leak check grooves should be used. The grooves shall be arranged equidistantly between the bolt holes. 4.1.4 Gasket In general, the gasket should be softer than the flange to avoid dulling of flange knife edge. NOTE Ox
29、ygen-free high conductivity (OFHC) copper is commonly used, but it is not the intent of this part of ISO 3669 to specify or limit the choice of gasket material to OFHC copper. ISO/TS 3669-2:2007(E) ISO 2007 All rights reserved 34.2 Dimensions Flange dimensions are shown and specified in Figures 1 to
30、 3 and in Table 1 and Table 2. See Figure 4 for the recommended dimensions of leak check grooves. a) Rotatable flange b) Non-rotatable flange Figure 1 Basic flange dimensions ISO/TS 3669-2:2007(E) 4 ISO 2007 All rights reservedDimensions in millimetres Figure 2 Knife-edge detail Figure 3 Metal gaske
31、t aRecommendation: leak check groove equidistant ( 0,15 mm) between bolt holes. bNon-rotatable flange. cRotatable flange. Figure 4 Recommended dimensions for leak check grooves ISO/TS 3669-2:2007(E) ISO 2007 All rights reserved 5Table 1 Flange dimensions l1l2l3l4 l5l6l7l8l9Bolt hole Seal recessKnife
32、 edge Thickness of inner rotatable ring Depth of pipe connection Flange thicknessNominal outside diameter Max. tube aNo. bolts bTol. 0,20+Bolt circle Position tolerance of bolt hole centre Tol. 0,20+Tol.0,1 min Tol. 0,1 min Nominal bore mm (in) mm mm Bolt thread cmm mm mm mm mm mm mm 10CF 25,0 (1,0)
33、 12,0 6 3,3 M3 0,5 17,50 0,1 13,50 10,50 3,00 6,0 16CF 33,8 (1,33) 19,4 6 4,4 M4 0,7(#8-32) 27,00 0,1 21,40 18,30 3,30 5,90 7,0 25CF 54,0 (2,12) 25,8 4 6,8 M6 1,0(1/4“-28) 41,30 0,2 33,00 27,70 4,30 6,00 11,5 40CF 69,9 (2,75) 40,0 6 6,8 M6 1,0(1/4“-28) 58,70 0,2 48,30 41,90 4,30 7,70 12,5 50CF 85,7
34、(3,38) 51,0 8 8,4 M8 1,25(5/16“-24)72,40 0,2 61,80 55,90 4,90 9,70 16,0 63CF 114,3 (4,50) 70,0 8 8,4 M8 1,25(5/16“-24)92,20 0,2 82,50 77,20 6,40 12,70 17,0 75CF 117,4 (4,62) 76,2 10 8,4 M8 1,25(5/16“-24)102,30 0,2 91,60 85,20 6,50 13,00 17,5 100CF 152,4 (6,00) 108,0 16 8,4 M8 1,25(5/16“-24)130,30 0,
35、2 120,60 115,30 7,20 14,30 19,5 125CF 171,5 (6,75) 127,0 18 8,4 M8 1,25(5/16“-24)151,60 0,2 141,80 136,30 7,20 14,30 21,0 160CF 203,2 (8,00) 159,0 20 8,4 M8 1,25(5/16“-24)181,00 0,2 171,40 166,10 8,00 15,90 21,0 200CF 254,0 (10,00) 205,0 24 8,4 M8 1,25(5/16“-24)231,80 0,2 222,20 216,90 8,60 17,20 24
36、,0 250CF 304,8 (12,00) 256,0 32 8,4 M8 1,25(5/16“-24)284,00 0,2 273,10 267,50 9,00 18,00 24,0 275CF 336,6 (13,25) 273,4 30 10,8 M10 1,5(3/8“-24) 306,30 0,2 294,40 288,20 9,90 19,80 28,0 300CF 368,3 (14,5) 306,0 32 10,8 M10 1,5(3/8“-24) 338,10 0,2 326,40 320,00 9,90 19,80 28,0 350CF 419,1 (16,5) 356,
37、0 36 10,8 M10 1,5(3/8“-24) 388,90 0,4 376,70 373,00 10,40 20,70 28,0 400CF 469,9 (16,5) 406,0 40 10,8 M10 1,5(3/8“-24) 437,90 0,4 424,40 419,00 10,40 20,70 28,0 aGiven for guidance only and corresponding to commonly used austenitic stainless steel flanges. bNumber of bolts equispaced on bolt circle.
38、 cMetric tap (English tap), according to ISO 965-1. ISO/TS 3669-2:2007(E) 6 ISO 2007 All rights reservedTable 2 Dimensions of metal gasket Outside diameterTolerance Nominal bore l11 mm mm 10 13,3 16 21,3 25 32,9 40 48,2 50 61,7 63 82,4 75 91,5 00,2100 120,5 125 141,7 160 171,3 200 222,1 00,3250 272,
39、9 275 294,3 300 326,2 350 376,5 400 423,9 00,5ISO/TS 3669-2:2007(E) ISO 2007 All rights reserved 7Bibliography 1 ISO 3, Preferred numbers Series of preferred numbers 2 ISO 286, ISO system of limits and fits 3 ISO 965-1, ISO general-purpose metric screw threads Tolerances Part 1: Principles and basic
40、 data 4 ISO 1609, Vacuum technology Flange dimensions 5 WHEELER, W. and CARLSON, M. Varian Associates, Palo Alto, CA, USA. 1961. Ultra-high Vacuum Flanges. Trans. 8thNat. Vac. Symp., American Vacuum Society, pp 1309-1318 6 WHEELER, W. Varian Associates, Palo Alto, CA, USA. 1963. Theory and Applicati
41、on of metal gasket seals. Trans. 10thNat. Vac. Symp., American Vacuum Society, pp 159-165 7 EDWARDS, D. Jr., McCAFFERTY, D. and RIOS, L. Brookhaven National Laboratory, Upton, NY, USA. 1980. Sealing of knife-edge flanges after a high temperature vacuum firing. J. Vac. Sci. Technol. 16(6), Nov/Dec, p
42、p 2114-15 8 UNTERLERCHNER, W. CERN, 1211 Geneva 23, Switzerland. 1987. Some improvement work on Conflat joints and their limit of reliability in a large-size ultrahigh vacuum system. J. Vac. Sci. Technol. A 5 (4), Jul/Aug, pp 2540-2543 9 WIKBERG, T. and DODELIN, E. CERN, 1211 Geneva 23, Switzerland.
43、 1990. FEM calculations of UHV all-metal demountable joints for LEP. Vacuum 41, num 7-9, pp 2082-2085 10 KITAMURA, K., ITOH, K., UCHIDA, T. and KONDOH, M. Heavy Apparatus Engineering Laboratory, Toshiba Corporation, 2-4, Suehiro-cho, Tsurumi-ku, Yokohama, 230, Japan 11 OBARA, K, NAKAMURA, K. and MUR
44、AKAMI, Y. Naka. Fusion Research Establishment, Japan Atomic Energy Research Institute, 801-1, Mukouyama, Nakamachi, Naka-gun, Ibaraki-ken, 311-02 Japan. Experimental and analytical studies on mechanical behaviour of knife-edge-type metal-seal flange for fusion vacuum sealing. J. Vac. Sci. Technol. A 12(6), Nov/Dec 1994, pp 3217-3223 ISO/TS 3669-2:2007(E) ICS 23.160 Price based on 7 pages ISO 2007 All rights reserved
