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1、a UDC 621.643.41 2 JAPANESE INDUSTRIAL STANDARD Basis for calculation of pipe flanges a Translated and Published bY Japanese Standards Association Printed in Japan 27 S Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie
2、 Not for Resale, 03/12/2007 21:38:33 MDTNo reproduction or networking permitted without license from IHS -,-,- In the event of any doubt arising, the original Standard in Japanese is to be final authority, 1 t Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IH
3、S Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 21:38:33 MDTNo reproduction or networking permitted without license from IHS -,-,- JAPANESE INDUSTRIAL STANDARD Basis for calculation of pipe flanges UDC 621.643.412 J I S B 2205-1991 i. Scope This Japanese Industrial Standard spec
4、ifies the basis for stress calculation of bolt-fastening pipe flanges using a ring gasket (hereafter referred to as “flange“ 3 . Furthermore, the basis for calculation of flat-face flange using a full- face gasket is shown in Informative reference 1, and that of metal face contact flange, in Informa
5、tive reference 2. Remarks 1. The basis for calculation specified in this Standard is used to calculate and to evaluate the stress generated in the flange at each stage, by assuming the two independent imaginary stages at the time of gasket clamping and under the operating condition (pressurized stat
6、e, hereinafter similar to this). Therefore, the load to be used for calculation herein shall be the load which actuate to the flange when bolts are fastened and inner pressure or outer pressure is applied, and the loads as shown in the following are not considered. (1) The unnatural forced force whi
7、ch acts when the flange is inst alled. (2) The outer force transmitted from the connected piping system during service. (3) The thermal stress generated inside the flange during service. (4) The stress generated by heat expansion difference between the flange and the bolt during service. 2. This Sta
8、ndard is not applicable in the case where the flange surfaces contact with each other at the outside of center circle of bolt holes in both cases of clamping time of gasket and of operating condition. 3. In this Standard the units, numerical values and calculation formulae shown in a l units and ind
9、icated for informative reference, are in accordance with the convention- Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 21:38:33 MDTNo reproduction or networking permitted without license
10、from IHS -,-,- 2 B 2205-1991 2, Symbols The symbols used in this Standard shail be as follows: Outside diameter of flange (mm), However, in the case where bolt holes are notched till the outside diameter of the flange, it is the diameter of the inscribed circle of notches, nTdb2 , total effective se
11、ctional area of actually used bolts (mm21 Required total effective sectional area of bolts (mmz), and the larger value out of Ami, and Arna Required total effective sectional area of bolts under operating condition (mm 2 Required total effective sectional area of bolts at the time of clamping the bo
12、lts (mm2 Inside diameter of flange (mm). formula of axial stress OH of hub, when B is smaller than 20 gi , B may be used instead of B e B+go (mm) (in the case of integral type flange whenf21 ) However, in the calculation B+gi (mm) (in the case of loose type flange or of integral type flange when f 6
13、.35 mm b=2.52 P k O A o O m k 8 e l Q k k O a, a , ci “ O m *FI l-4 G O P W O ci w k O a, rl 2 E C A O Co O ci w k O a , rl CI E d a, a, ci vi rn vi i3 8 ci m Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for R
14、esale, 03/12/2007 21:38:33 MDTNo reproduction or networking permitted without license from IHS -,-,- Attached Table 2. Basic width of gasket seating Shape of seating face 2 N w w s n 4 (9 /C/,/, ,N_ Basic width of gasket seating b, I 1 J I S B*2205 93 4933b08 0502737 4 I 16 B 2205-1991 N 2 - w + T ,
15、 2. However,- shall be the maximum, w + N 4 N 4 - 3N 8 _. N 4 - W - 8 II N 2 - w + T , 2. w + N lowever, - shall be the 4 maximum. w +3N 8 3N 8 _ 7N 16 e 3N 8 - Note (3) Where serrations do not exceed 0.4 mm in depth and 0.8 mm in serration pitch, sketch lb or Id is to be used, Remarks: In this tabl
16、e, concerning division of the basic width of gasket seating bo into I and II, refer to Attached Table 1, Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 21:38:33 MDTNo reproduction or netwo
17、rking permitted without license from IHS -,-,- li 17 B 2205-1991 Attached Fig. 1. Value of f (Hub stress correction factor. Calculation formulae are shown in Attached Table 3.) -fi 90 Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, Us
18、er=Wing, Bernie Not for Resale, 03/12/2007 21:38:33 MDTNo reproduction or networking permitted without license from IHS -,-,- 1 J I S B*2205 93 m 4933608 0502739 8 18 B 2205-1991 Attached Fig. 2. I Value of F (Factors of integral type flange and optional type flange to be calculated as the integral
19、type flange. The calculation formulae are shown in Attached Table 3.) F t Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 21:38:33 MDTNo reproduction or networking permitted without license
20、 from IHS -,-,- J I S B*2205 91 m 4933608 0502720 4 m 19 B 2205-1991 Attached Fig. 3. Value of (mm) Either the gasket outside diameter or the flange outside diameter, whichever is the smaller value (mm) $BzP acting point (mm) h$ : (c+dh+2b“)-B , radial distance from the bolt circle to the H; acting
21、point (mm) G-(C+dh)+% , radial distance from the bolt circle to the HR acting point (mm) 4 4 hR : Mo : HRhR, , total moment actin condition (N mm kgf emmy) on the flange under the operating m : Gasket factor, according to Attached Table I of the text. n : Number of bolts P : Internal pressure (MPakg
22、f/cm2) t : Thickness of flange (mm) WM1 : The minimum bolt load required under the opera-ing conc (N kgf ) ition Wmz : The minimum bolt load required for clamping the gasket (N kgf 1) The minimum design clamping pressure of gasket (N/mm2kgf/mm2) Y : oB : The permissible tensile stress of bolt materi
23、d at ordinary tempera- ture (N/mm2kgf/mm2) 66 : The permissible tensile stress of bolt material at operating tempera- ture (N /mm kgf /mm ) of : The permissible tensile stress of flange material at operating temperature (N /mm kgf /mm ) 3. Bolt loads and bolt sectional area (I) Bolt loads required f
24、or calculation calculation of total effective sectional area required for bolts shall be The bolt loads to be used for as follows: (b) Bolt load at clamping the gasket Wmz= nCby=47rCya Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, U
25、ser=Wing, Bernie Not for Resale, 03/12/2007 21:38:33 MDTNo reproduction or networking permitted without license from IHS -,-,- (2) Total effective secitonal area required for bolts The total effective sectional area J I S B*2205 91 m 4933b08 0502729 O m 28 B 2205-1991 Copyright Japanese Standards As
26、sociation Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 21:38:33 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*2205 91 4933608 0502730 7 _ _ _ _ _ _ _ _ _ 29 B 2205-1991 Informative reference
27、2. Metal face contact flange This Informative reference is described relating to the stress calculation method of metal face contact flange and is not a part of this Standard, 1, ScoDe This Informative reference 2 indicates the stress calculation method for metal face contacting flange. Remarks 1. T
28、o the metal face contacting flange (hereafter referred to as nflangetf) the following restrictions are attached : (i) For gasket , the self-sealing gasket is to be used, and the position of gasket is inside of the bolt circle. (2) The flange face shall be a plane and the gasket can be contacted over
29、 the whole flange face by a compara- tively low bolt clamping load, (3) After clamping bolts, it is able to obtain uniform contact of metal to each other over the whole flange face. (4) The load to be used for calculation shall be exclusively internal pressure load, and bolt clamping load and gasket
30、 load which satisfy the restrictions of (2) and (31, and the following loads are not considered. External force transmitted from piping system (a) (b) (c) Thermal stress generated inside of flange or bolts Unnatural forced force generated at installing (5) The types of flanges shall be loose type, i
31、ntegral type and optional type as shown in Fig. 1 in text, except the lap joint type. (6) . Two flanges to be assembled may not be necessarily the same in dimensions, shape and mechanical properties of the material, but carry out the calculation of 5. in accordance with classification shown in 4. (7
32、) In the case of Class 1, metallic spacer may be used, but in the cases of Class 2 and Class 3, the metallic spacer shall not be used. In the case where metallic spacer is used in Class 1, it shall reach outside of bolt circle (see 4. for specification of classes). (8) The effective length of bolts
33、shall not be remarkably long due to sleeve , collar, multilayer washer, etc. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 21:38:33 MDTNo reproduction or networking permitted without lice
34、nse from IHS -,-,- J I S B*2205 9 1 D 4933608 0502731 9 = ! 30 B 2205-1991 2. In the case of the flange using ring gasket, taking into assumption the two independent assumption stages of bolt clamping condition and operating condition (pressurized condition, hereinafter similar to this), the stress
35、to be generated in the flange under each condition shall be calculated and evaluated, but in the case of metal contact plane flange, only the operating condition may be evaluated. This is because of the fact that under the bolt clamping condition excessive stress is not generated from the constructi
36、on of metal face contact flange, and for the bolt stress, the stress under the operating condition is always larger than the stress under the bolt clamping condition. 3. The criteria whether the optional type flange is considered to be integral type or loose type shall be in accordance with 3.2 (3)
37、of the text, 4. The following items shown in this Informative reference 2 are completely same as those in the text . (i) Permissible stress of 6. (2) Type and construction of flange in Informative reference 2 Attached Fig. 1 (However, except the points where the lap joint type is deleted, illustrate
38、d points of H, and hc , and the points illustrated with the groove for gasket. ) (3) The moment arm of Informative reference 2 Attached Table 1. 5. In this Informative reference 2, the units and numerical formulae shown in are in accordance with the con- ventional units and indicated as informative
39、reference. 2. Svmbols (I) The symbols used in this Informative reference 2 shall be as follows: A : Ab : Outside diameter of flange (mm) n-db2 x 4 (mm2) , total effective sectional area of bolts used practically AR : 2 ratio of bolt holes occupied in circumference of bolt circle. nc U : A+C shape fa
40、ctor 2Bl B : Inside diameter (mm) of flange, However, in the calcualtion formula of hub axial stress OH , when B is less than 20 9 1 B may be used instead of B . BI : B+gl (mm) (In the case of loose type flange or integral type flange when f 1, f expresses the ratio of stress at a part of g o in hub
41、 thickness to the stress at a part of 9 1 in thickness. When f 9 A Notes (1 (5) See 5. (2.1) (a). See 2. (2) and 2. (3). c Remarks: 1. To be 2. When the calculation of flange II is carried out according to 5. ( 2 . 0 , consider as follows: A = G , = = Copyright Japanese Standards Association Provide
42、d by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 21:38:33 MDTNo reproduction or networking permitted without license from IHS -,-,- 49. B 2205-1991 I +BE D Informative reference 2 Attached Fig. 5. Class 3 Metal to metal contact Y u %A B E
43、; LJ t - 1 . 1 - 90=9/ - 9B CI (u ? R V Note (5) See 2, (.2) and 2. (3). Type of flange ho hc Integral type flange and optional type R+O-Sgi C-G 2 flange to be calculated as integral type Loose type flange and optional type C-B C-G e flange to be calculated as loose type 2 2 C Remarks: To be B , , $
44、 ht R+gi+hc 2 hD+h, 2 i Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 21:38:33 MDTNo reproduction or networking permitted without license from IHS -,-,- - J I S B*2205 91 m 4933608 050275
45、3 4 m a P a 1 B 2205-1991 Edition 1 Japanese Text Established by Minister of International Trade and Industry Date of Establishment: 1986-02-01 Date of Revision: 1991-08-01 Date of Public Notice in Official Gazette: Investigated by: 1991-08-16 Japanese Industrial Standards Committee Divisional Counc
46、il on Machine Elements This English translation is published by: Japanese Standards Association 1- 24 , Akasaka 4, Minato-ku, Tokyo 107 Japan O JSA, 1992 Printed i n Tokyo by Hohbunsha Co., Ltd. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 21:38:33 MDTNo reproduction or networking permitted without license from IHS -,-,-