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1、J IS JAPANESE INDUSTRIAL STANDARD Translated and Published by Japanese Standards Association (KHK/ JSA) Saddle supported horizontal pressure vessels ICs 23.020.30 Reference number : JIS B 8278 : 2003 (E) PROTECTED BY COPYRIGHT 8 S Copyright Japanese Standards Association Provided by IHS under licens
2、e with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:48:53 MDTNo reproduction or networking permitted without license from IHS -,-,- B 8278 : 2003 Foreword This translation has been made based on the original Japanese Industrial Standard revised by the Ministe
3、r of Health, Labour and Welfare, and the Minister of Economy, Trade and Industry through deliberations at the Japanese Industrial Standards Committee, as the result of proposal for revision of Japanese Industrial Standard submitted by The High Pressure Gas Safety Institute of Japan (KHKYJapanese Sta
4、ndards Association (JSA) with the draft being attached, based on the provision of Article 12 Clause 1 of the Industrial Standardization Law applicable to the case of revision by the provision of Article 14. Consequently JIS ?3 8278 : 1993 is replaced with this Standard. Attention is drawn to the pos
5、sibility that some parts of this Standard may conflict with a patent right, application for a patent after opening to the public, utility model right or application for registration of utility model after opening to the public which have technical properties. The relevant Minister and the Japanese I
6、ndustrial Standards Committee are not responsible for identifying the patent right, application for a patent after opening to the public, utility model right or application for registration of utility model after opening to the public which have the said technical properties. Date of Establishment:
7、1993-03-15 Date of Revision: 2003-09-30 Date of Public Notice in Official Gazette: 2003-09-30 Investigated by: Japanese Industrial Standards Committee Standards Board Technical Committee on Industrial Machinery JIS B 8278 : 2003, First English edition published in 2004-08 Translated and published by
8、: Japanese Standards Association 4-1-24, Akacaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising as to the contents, the original JIS is to be the final authority. O JSA 2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utiliz
9、ed in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed in Japan PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001,
10、User=Wing, Bernie Not for Resale, 03/14/2007 03:48:53 MDTNo reproduction or networking permitted without license from IHS -,-,- 1 2 3 4 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 Contents B 8278 : 2003 Page Scope Normative references Definitions Meaning of symbols . Design of saddle of horizontal cylindr
11、ical vessel and peripheral parts Design in general . Combination of load Reaction force of saddle Stress in axis direction of centre part of cylindrical shell and saddle part Circumferential shear stress of shell plate at saddle part Circumferential stress at saddle horn part Compression stress at b
12、ottom of shell plate of saddle part Stress generated on end plate . Stress evaluation . 1 1 1 1 4 4 4 4 5 6 6 7 8 8 (i) PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/200
13、7 03:48:53 MDTNo reproduction or networking permitted without license from IHS -,-,- JAPANESE INDUSTRIAL STANDARD JIS B 8278 : 2003 Inside surface of shell plate Saddle supported horizontal pressure vessels Outside surface Inside surface Outside surface of shell plate of shell plate of shell plate 1
14、 Scope This Japanese Industrial Standard specifies calculation related to a saddle of horizontal cylindrical pressure vessels, supported by two saddles symmetrically installed which receive uniformly-distributed load. As for the rule of application, where there is a specification, it shall be in acc
15、ordance with JIS B 8265 or JIS B 8266, and where there is no specification, it shall be in accordance with the agree- ment between the purchaser and the manufacturer. -1 2 Normative references The following Standards contain provisions which, through reference in this Standard, constitute provisions
16、 of this Standard. The most recent editions of the standards (including amendments) shall be applied. JIS B 0190 Glossary of terms used in construction ofpressure vessels JIS B 8265 Construction of pressure vessel-General principles JIS B 8266 Alternatiue standard for construction of pressure vessel
17、s +1 +1 -1 3 Definitions O190 apply. For the purposes of this Standard, the definitions given in JIS B +1 4 Meaning of symbols Meaning of symbols used in this Standard shall be as follows. A : distance from the shell tangent line to the centre of the saddle (mm) (see figure 1) a : sum of sectional a
18、reas of one stiffening ring and shell plate considered as effective in reinforcing (mm2) (see figure 2) B : horizontal width of the saddle (mm) (see figure 1) b : width of the saddle (mm) (see figure 1) Cl, C2 : coefficient according to the stiffening ring mounting location, and shall be in accordan
19、ce with table 1. -1 -1 +1 Table 1 Coefficient according to stiffening ring mounting location Coefficient = Stiffening ring mounting location I Within saddle plane I Neighbourhood of saddle I D, : mean diameter of the shell (mm) (see figure 1) H : depth of the end plate (mm) PROTECTED BY COPYRIGHT Co
20、pyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:48:53 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 B 8278 : 2003 Hu : height from the bottom surface of the s
21、addle base plate to the centre of the vessel (mm) (see figure 1) h : length of the wear plate measured along circumferential direction of the shell from the saddle horn part (mm) (see figure 1) Kit, Kib, K2, K3 K4, K5 K6, K7 K8 and K9 : coefficient decided according to the supporting angle of the sa
22、ddle (shall be as table 2) coefficient decided according to the supporting angle of the saddle end (AIR,) distance between the tangent lines of the shell (mm) (see figure 1) distance between the centres of the saddles (mm) (see figure 1) length of effective section corresponding to bending moment of
23、 the shell in the circumferential direction, and shall be 4 R , or L/2 (mm), which- ever is the smaller horizontal component of force by wind load or earth quake load (NI, whichever is the greater vertical load equivalent to horizontal load (N) fiange length of the stiffening ring (mm) (see figure 2
24、) maximum bending moment in the circular direction at the saddle part (N mm) bending moment at the centre part of the cylindrical shell (N mm) bending moment of the saddle part (N-mm) compression load in the circular direction at the saddle horn (N) number of the stiffening rings mounted to each sad
25、dle design pressure or hydraulic test pressure, and minus value for exter- nal pressure (MPa) reaction force in the vertical direction generated on one saddle (NI mean radius of the shell (mm) (see figure 1) thickness of the shell plate (mm) (see figure 1) thickness of the end plate (mm) (see figure
26、 1) thickness of the wear plate (mm) (see figure 1) tare of the vessel (including the weight of content and accessories) (NI composite section modulus of the stiffening ring and the shell plate considered as effective in reinforcing (mm3) section modulus of the shell plate at the central part of the
27、 cylindrical shell (mm3) section modulus of the shell plate at the saddle part (mm3) supporting angle of the saddle (“1 composite stress of the top of shell plate at the saddle part (N/mm2) PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee
28、=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:48:53 MDTNo reproduction or networking permitted without license from IHS -,-,- 3 B 8278 : 2003 Saddle horn part composite stress of the bottom of shell plate at the saddle part (N/mm2) composite stress of the top of shell pl
29、ate at the central part of the cylindrical shell (N/mm2) composite stress of the bottom of shell plate at the central part of the cylindrical shell (N/mm2) composite stress of the shell plate at the saddle horn part (N/mm2) compression stress of the shell plate at the bottom end part of the saddle (
30、N/mm2) maximum circumferential stress at the end plate (N/mm2) composite stress of the stiffening ring (N/mm2) circumferential shear stress at the shell plate of the saddle part (N/mm2) maximum circumferential shear stress generated on the end plate (N/mm2) L Tangent 7 . 1 line Figure 1 Symbols of d
31、imensions used in calculation Section modulus for examination of the strength of shell side (2,) I 2 1 =- el Section modulus for examination of the strength of stiffening ring (2,) I Zz=- e 2 where, I : moment of inertia of the neu- tral axis (X - X) shown as the shaded part (mm4) a : area of the sh
32、aded part (mmz) Figure 2 Effective range and section modulus of stiffening ring PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:48:53 MDTNo reproduction or network
33、ing permitted without license from IHS -,-,- 4 B 8278 : 2003 Within the saddle plane: Y 5 0.784- 0.5: ZSb = KlbRrn2ts where, Kit, Klb = coefficient of the saddle sup- porting angle and shall be as specified in table 2. 2) When the stiffening ring is mounted within the saddle surface or in the neighb
34、ourhood of the saddle, or when the saddle is mounted close to end plate (AIR, I0.5) and AIR, 0.5: z , c j t = ZSb = nR,2ts b) Combination stress of the centre part of cylindrical shell (top of shell plate) PDm M L C 4ts zc o 2 t = (bottom of shell plate) oz,=- PDm MLC 4ts zc where, Z, = nR,2ts PROTE
35、CTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:48:53 MDTNo reproduction or networking permitted without license from IHS -,-,- 6 B 8278 : 2003 5.5 Circumferential shea
36、r stress of shell plate at saddle part 5.5.1 In the case face that stiffening ring is not mounted within the saddle sur- A R, a) For 0.5 TIs = - b) For the saddle 5.5.2 In the case mounted near the end plate (AIR, I 0 . 5 ) that stiffening ring is mounted within the saddle surface 5.6 Circumferentia
37、l stress at saddle horn part 5 . 6 . 1 In the case that the stiffening ring is not mounted within the saddle surface nor in the neighbourhood of the saddle a) In the case where wear plates can be included in calculation In the case where the saddle is located near the end plate (AIR, I0.5) and where
38、 the wear plates are mounted so that the dimension in circumferential direction from the top of the saddle horn to the upper edge of the wear plate is no less than h = RJ10 and the dimension in longitudinal direction from the side edge of the saddle to the adjacent side edge of the wear plate is no
39、less than 0.784& , stress shall be calculated as follows: i) Combination stress of shell plate at saddle horn part where, M, = K4QR, K4 : coefficient calculated from saddle supporting angle and AIR, and shall be as specified in b). 2) Circumferential stress of shell plate at wear plate end shall be
40、as specified in b) provided t, = O, and 8 to be used for obtaining K4 from table 2 shall be either e+- 360h or e+ 12 nRm whichever is the smaller. b) In the case where wear plates cannot be included in calculation In the case where condition a) is not satisfied, circumferential direction stress of t
41、he shell plate at the saddle horn part shall be as follows: PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:48:53 MDTNo reproduction or networking permitted withou
42、t license from IHS -,-,- 7 B 8278 : 2003 6M, PD, *- +- Q 0331 = - 4tJb + 1.561/R,t,) Let: 2t, where, M, = K4QR, A for -50.5 R r n i) K 4 = 4 K4 K4 3A A R, 2) K4=- R m - l)for0.5 1 5.6.2 In the case where stiffening ring is mounted within the saddl- s face Stress of the shell plate and the stiffening
43、 ring shall be as follows: I a3=-+- Nc CNc + PDrn(1*56-l%ts +1F) nRa nRZ1 2a I OR=-+- Nc C2Mc + PDm(1.56d %ts + IF) nRa nRZ2 2a where, N, = K5Q, M, = KlQR, r- 5.6.3 In the case where stiffening ring is mounted around saddle the shell plate and the stiffening ring shall be as follows: Stress of 7 Nc
44、ClMc + PDrn(1*56J%ts +1F) 2a 03=-+- OR=-+- Nc C2Mc + PDrn(1-56$?Z+Z) nRa nRZ, nRa nRZ2 2a where, N,= K6Q, M, = K7QR, 5.7 Compression stress a t bottom of shell plate of saddle part 5 . 7 . 1 In the case where wear plates can be included in calculation In the case where the wear plates of which the d
45、imension (in vessel axis direction) from the each side edge to the adjacent side edge of the saddle is no less than 0.78JR& are mounted, stress shall be calculated as follows: where, K8 : coefficient calculated from saddle supporting angle and shall be as specified in table 2. 5.7.2 In the case wher
46、e wear plates cannot be included in calculation In the case where condition 5.6.1 a) is not satisfied, stress shall be calculated as follows: PDln +- K8Q u 4 = - ts(b + 1 . 5 6 m ) 2ts PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS
47、Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:48:53 MDTNo reproduction or networking permitted without license from IHS -,-,- 8 B 8278 : 2003 5.8 saddle is located close to the end plate (A/R, 4 0.5) shall be calculated as follows: a) Stress generated on end plate Stress gene
48、rated on the end plate when the Combination stress of circumferential direction stress i) For the 2 : 1 elliptical end plate 2) For the hemispherical end plate 3) For the dished end plate where, Kg : coefficient calculated from saddle supporting angle and shall be as specified in table 2. R h : inside radius of the centre part of the dished end plate (mm) ?-h : inside radius of the corner part of the dished end plate (mm) b) Circumferential shear stress on end plate