GB/T 12221-2005 English PDF (GBT12221-2005)

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GB/T 12221-2005: Metal valves -- Face to face, end to end, center to face and center to end dimensions
GB/T 12221-2005
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.060
J 16
Replacing GB/T 12221-1989, GB/T 15188.1~15188.4-1994
Metal Valves - Face to Face, End to End, Center
to Face and Center to End Dimensions
(ISO 5752.1982, Metal Valves for Use in Flanged Pipe Systems -
Face-to-face and centre-to-face Dimensions, MOD)
ISSUED ON. FEBRUARY 21, 2005
IMPLEMENTED ON. AUGUST 1, 2005
Issued by. General Administration of Quality Supervision,
Inspection and Quarantine of the People's Republic of
China;
Standardization Administration of the People's
Republic of China.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative References ... 5 
3 Definitions ... 5 
4 Structure Dimensions and Tolerances ... 6 
Foreword
This Standard modifies and adopts ISO 5752.1982 "Metal Valves for Use in Flanged
Pipe Systems - Face-to-face and centre-to-face Dimensions". Compared with ISO
5752.1982, the main differences in this Standard are as follows.
— Structure and drafting rules of this Standard are in accordance with GB/T
1.1-2000;
— This Standard adopts some definitions in Chapter 2 of ISO 5752.1982;
— Chapter 4 "Terminology" of ISO 5752.1982 was deleted from this Standard.
Compared with GB/T 12221-1989, the main changes in this Standard are as follows.
— Standard name is changed; the scope of application is extended from flange
connection to welded end, wafer type, female thread and male thread.
— Add the basic structural lengths of welded ends, wafer type valves, female
threads and male threads, AND structural length dimensions of various valves;
— Valve dimensions with flanged joint adopt ISO 5752.1982;
— Basic series dimensions in Table 1 of original standard were modified. series 6
and 17 (no available data) were deleted; series 25, which is not applicable to
flanged joint, was placed to the basic series dimensions of wafer type
connecting valves;
— Dimension list of same-type series gate valves in Table 2 of original standard
was deleted.
This Standard replaces GB/T 12221-1989 "Metal Valves for Use in Flanged Pipe
Systems - Face-to-Face, and Center-to-Face Dimensions" and GB/T 15188.1 ~
15188.4-1994 "Face-to-Face, Centre-to-Face, End-to-End and Centre-to-End
Dimensions of Valves".
This Standard was proposed by China Machinery Industry Federation.
This Standard shall be under the jurisdiction of the National Technical Committee on
Valves of Standardization Administration of China (SAC/TC 188).
Drafting organizations of this Standard. Hefei General Machinery Research Institute,
Hubei Hongcheng General Machinery Co., Ltd., Shanghai Research Institute of
General Machinery Co., Ltd., CNNC SUFA Technology Industry Co., Ltd., Zhejiang
Wuzhou Valve Co., Ltd. AND Shenyang Shengshi High and Medium Pressure Valve Co.,
Ltd.
Drafting staffs of this Standard. Wang Xiaojun, Wang Hongyun, Kong Biaolong, Chen
Jianping, Zheng Zuhui, Zheng Yunhai, Liu Xiaochun and Ye Qin.
The previous editions replaced by this Standard are as follows.
— GB/T 12221-1989, GB/T 15188.1 ~ 15188.4-1994.
Metal Valves - Face to Face, End to End, Center to
Face and Center to End Dimensions
1 Scope
This Standard specifies the basic series of face-to-face, centre-to-face, end-to-end
and centre-to-end dimensions of flanged joint valves, welded end valves, wafer type
connection valves, female thread connection valves, male thread connection valves,
and the permissible variations of structural dimensions.
This Standard is applicable to the face-to-face, centre-to-face, end-to-end and
centre-to-end dimensions of gate valves, stop valves, ball valves, butterfly valves,
plug valves, diaphragm valves and check valves with nominal pressure (PN) ≤ 42.0
MPa and nominal diameter of DN 3 mm ~ DN 4 000 mm.
2 Normative References
The following normative documents contain provisions which, through reference in
this text, constitute provisions of this Standard. For dated references, the subsequent
amendments or revisions of these publications do not apply. However, parties who
enter into agreements based on this Standard are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated
below.
GB/T 1047 Pipework Components - Definition and Selection of DN (Nominal Size)
(GB/T 1047-2005, ISO 6708.1995, MOD)
GB/T 1048 Pipework Components - Definition and Selection of PN (GB/T
1048-2005, ISO 7268.1996, MOD)
3 Definitions
3.1 Through way type of valves face to face, end to end, center to face and
center to end dimensions
The distance between the two planes perpendicular to the valve axis, located at the
extremities of the valve-body end ports.
3.2 Angle type of valves face to face, end to end, center to face and center to
end dimensions [Translator. for ease of reading, hereafter “face to face, end to end,
center to face and center to end dimensions” is abbreviated as structure dimensions]
4.3.5 The basic series of female thread valves’ structure dimensions are given in Table 5.
Table 5 Female Thread Valves’ Structure Dimensions — Basic Series
Dimensions in millimetres
Nominal size
DN
Basic series
N1 N2 N3 N4 N5 N6 N7 N8 N9 N10 N11 N12 N13 N14 N15 N16 N17 N18
Structure dimensions
— — — —
— —
— — —
— — — — — —
10 48 56 80 80 80 80 80 80
15 42 50 52 56 60 65 65 65 68 80 90 90 90 90 90 90 90 90
20 45 60 60 67 65 70 75 85 78 90 100 100 100 100 100 100 100 100
25 52 65 70 78 75 80 90 110 86 110 115 120 110 120 120 110 120 120
32 55 75 80 88 85 90 105 120 100 130 130 140 120 130 140 120 140 130
40 60 85 86 104 95 100 120 140 106 150 150 170 135 140 170 135 170 150
50 70 95 104 120 110 110 140 165 130 170 180 200 170 170 200 155 180 170
— —
120 130 165 203
— — — — — — 80 90 130
— — —
100 110 145 — 300 —
Note 1. It is applicable to through way type and angle type valves.
Note 2. Tolerances of structure dimensions is ±1.6 mm.
4.3.8 Wafer knife gate valves’ structure dimensions are given in Table 8.
Table 8 Wafer Knife Gate Valves’ Structure Dimensions
Dimensions in millimetres
Nominal size
DN
Nominal pressure PN ≤ 2.0 MPa
Structure dimensions
65 —
Basic series J16 J17 J18
Note. Tolerances of structure dimensions is ±1.6 mm.
4.3.9 Welded end gate valves’ structure dimensions are given in Table 9.
Table 9 Welded End Gate Valves’ Structure Dimensions
Dimensions in millimetres
Nominal size
DN
Nominal pressure PN (MPa)
1.0 ~ 2.0 2.5 ~ 5.0 6.3 10.0 15.0, 16.0 25.0 32.0, 42.0
Structure dimensions
Short Long Short Long Short Long Short Long
102 — —
— — — — —
15 108 140 165 165 264
20 117 152 190 190 273
25 127 165 216 133 216 140 254 140 254 186 308
32 140 178 229 146 229 165 279 165 279
40 165 190 241 152 241 178 305 178 305 384
50 216 216 292 178 292 216 368 216 368 279 451
65 241 241 330 216 330 254 419 254 419 330 508
80 283 283 356 254 356 305 381 305 470 368 578
100 305 305 406 305 432 356 457 406 546 457 673
125 381 381 457 381 508 432 559 483 673 533 794
300 502 635 850 502 635 850 502 850 762 838 965 1130 1422
350 572 762 980 572 762 980 762 980 826 889 1029 1257
400 610 838 1100 610 838 1100 838 1100 902 991 1130 1384
— — —
978 1092 1219
500 711 991 711 991 1054 1194 1321
550 — 1092 — 1092 1143 1295 —
600 813 1143 813 1143 1232 1397 1549
1245 1308 1448
700 1346 1346 1397 1549
750 1397 1397 1524 ...