This standard specifies the terminology, types and basic parameters, technical requirements, test methods, inspection rules and marking, packaging and storage requirements for steel flat gate valve products for pipelines. This standard is applicable to nominal pressure pN1.6~16MPa, nominal diameter DN50~1000mm, temperature -29~121℃, and the medium is steel flat gate valve for oil, natural gas and other pipelines. JB/T 5298-1991 Steel flat gate valve for pipelines JB/T5298-1991 Standard download and decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
Steel flat valves for pipelines
Subject content and scope of application
JB/T 5298.91
This standard specifies steel for factory pipelines The terminology, type and basic parameters, technical requirements, test methods, inspection rules and markings, packaging, and other basic requirements for flat gate valve products. This standard is applicable to nominal pressure PN1.6~16MPa, nominal diameter DN501000mm, temperature: 29-121 (, the medium is steel flat plate valve (hereinafter referred to as gate valve) for oil, natural gas and other pipelines. 2 Reference standards ||tt| |GB1047A
Nominal diameter of pipes and pipe accessories
GB1048 Nominal pressure and test pressure of pipes and pipe accessories GB4981 Pressure test of industrial valves
GB9113.1-9113.26 Solid steel Pipe flange GB9115.1~~9115.26 butt welded steel pipe flange GB9131 steel pipe flange pressure-temperature grade GB12220 universal valve mark
GB/T12252 universal valve" supply requirements
GB12234 Universal valve flange and butt welding connection steel gate valve J13/T5300 Universal valve material
Test and inspection of ZBJ16006 valve
JB308 valve model compilation method
3 terms||tt| |Flat gate valve
A kind of parallel gate valve with two sealing surfaces parallel to the vertical centerline, the elastic floating valve seat and the gate plate always adhere to each other during opening and closing, and the gate plate is plate-shaped
4 Types and basic parameters
4.1 Type
4.1.1 Product model compilation method is in accordance with the provisions of JB308. 4.1.2 Types include single gate, double gate, with diversion hole and without diversion. There are four types of holes, and the specific structures are shown in Figure 1 and Figure 2. 4.2 Basic parameters
4.2.1 The nominal pressure is in accordance with the provisions of GB1048. 4.2.3 Steel. The pressure-temperature grade of the pipe method cover is in accordance with the provisions of GB9131. The Ministry of Mechanical and Electronics Industry of the People's Republic of China approved 420
1992-0701 on 1991-07-22
5 technical requirements
without diversion Single hole gate
Picture]
JB/T 5298---91
Double agent plate without diversion hole
Picture 2
1 lot wheel; 2-stem nut: 3 valve stem; 4 bracket; --- packing; 6 packing plug; ? valve cover; 8-bolt; 9. valve body; 1 gate with guide hole double gate ||tt ||121
5.1 Valve body
JIB/T5298 97
5.1.1 The structural length of the flange connection shall be as specified in Table 1, and the structural length of the welded connection shall be as specified in Table 2 Specify 5.1.2 Structural length tolerance: when the nominal diameter is less than or equal to DN250mm, the limit deviation is ←1.6mm); when the nominal diameter is less than or equal to DN300mm, the limit deviation is 3.2mn. 5.1.3 The minimum wall thickness of the valve body is in accordance with the provisions of Table 3. 5.1.4 The connection dimensions of the flange and the shape and size of the sealing surface are in accordance with the provisions of GB9113.19113.26 and (19115.19113.2
Table||tt| |Nominal diameter
DN
50
65
80
100
150
200||tt| |250
300
350
400
460
500
600
700
800
900
1000
nominal diameter
3N
50
65
80
100
150
200
122
2.0
177.8
190.5
203.2
228.6|| tt||266.7
292.1
330.2
355.6
381.0
406.4
431.8
457.2||tt| |508.0
609.6
660.0
711.2
811.0
2.0
215.9
241.3
282.6
304.8
403.2
419.1
public
5.C
215.9
241.3
282.6
304.8
403.2
419.1
457.2
501.7
762.0
838.2
914.1|| tt ||990.6 ||tt | ||public
weigh
5. 0)
knot
215.9
241.3
282.6
304.8|| tt||403.2
119.1
force MIPa
10
length
pressure
structure
degree||tt ||292.1
330.2
355.6
131.8
558.8
660.1
787.4
838. 2||tt ||889.0
990.6
1 092.2
1193.8
1307.0
1 319. 4
J+MP
10
long
292.1
33:0.2
355.6
131.8
558.8
660.||tt| |365
110
381.0
137.2
G9.6
736.
38.2
.||tt ||1028.7
1130.3
1 219.?
132.
1319.
368.3
319
381
157
tiog.
7,
rini
rnm
nominal diameter
DN||tt| |250
300
350
100
4.50
500
600
700
800
900
nominal diameter
ON
50
65
80
1000
150
200
250
300
350
400
4.5
500
600|| tt||700
800
900
1000
Note: The shell includes the valve body and the valve cover.
5.2 gate
2. 1
457.2
501.7
571.5
609.6
660.4||tt| |711.2
812.8
914.1
911.4
1016.0
2.0
8.7
9.5
10.3
11.1
11. 9
12.7
14.3
15.9
16.7
17.5
18.2
19.0
20.6
22.3
25.4
JB/T 5298-- 91| |tt||美表2
MPa
公
称压
.0
结
457.2
501.7
762.0
838.2
91.
990.6
1143.(3
1316.2
表3|| tt.| |1549.1
公称
5.()
声
9.
11.1
1. 8
12.7
15.9
17.
19.0
20.6
22.2
23.8
27.0| |tt||30
31.5
34.9
体
t
最
MI
10||tt ||小
11.1
11, 9
12. 7
1E.bZxz.net
19.tm
2..1| |tt||1
38.
.
4.1.
08
33.2
5s.
438
6.2
T028
136.
121.2
ty
.
s.1
22.2
19.
.
.
mm
m
5.2.1
JB/T 5298— 91.
5.2.2 requirements of the valve stem, 5.3 valve stem and valve stem, the minimum diameter of the valve stem according to 4. 5.3.2 requirements有油封的铸牙，在打汽塑料函夛应什么安全脂注人结果。5.4 other technical requirements
特盖、托利、风板、手轮、品盖、品标国盖、手机、旧通设计体育手机手GB12234的实施。 5.5 Materials /m的闹手，间零银银链手机所JB/T5300的实施用。人于20～500mg/m\和500mg/m2 and above 闹手，门零银银链通通手言表5的集用，表4|| tt||公称通很
DN
50
65
80
100
150
200|| tt||250
300
350
400
450
500
600
700||tt| |800
900
1000
2.0
19.1
19.1
22.2
25.4
28.6
31.8
31.9
38.1
41.3
44.3
47.6
50.8
57.2|| tt||60.3
60.3
65.6
70.0
注：牙油在于安全系指与塑料青含段的安全电视的名行
公
称
5.0
厂
力，MPa
10
牙油最作安全
19.1||tt ||19. 1
22.2
25.4
31.8
31. 9
38.1
41.3
44.5
17.6
50.8
54.0
63.5
65.6| |tt||71.9
78.2
84.6
表5
使
用
HS和（)总内容表20~ 500mg / m ||低于面钢（表而报迷方法）： stainless steel
条
19.1
22. 2
25.4
28.6
38.1
41.3
47.6
50.8
57.2
60.3| |tt||63.5
69.9
76.2
84.6
97.3
111.1
130.2
件||tt ||13
29.
28.
28.6
31.8
41.3
17.
51. 1
60.3
63.5
76.2
77.1
79.2
98.3
nm
Hzs和CO. 总公司上天500mg/m
||前座
（）型工作
四料自密
歌机方法
tt||6
用情动方法
JB/ T5298--91
结表5
使
HzS和C):总公司的20~5(mg/m
额钢（天物抗迷法入):表6表6的运动。表6
公称
通很
D
mm
5-~100
150~~ 230
300-450
500
声
体
试
v?i
2
15.玻璃金：
鼠玻璃
四
密正视
min
--
6.2 手门正视的时间时间除应方法6.3人深合或风，混合加压到1.1PV；风加去到0.6MPa； continuous time according to 6.1.1条条小时间的方法的方法物而泳去孔可感气量，混合法去的时，不大丁0.001DN (mm/s)3) ||8.1 Mark
The valve mark shall comply with the provisions of GB12220, unless there are special requirements for ordering. 8.2 Painting
The outer surface of the gate valve shall generally be painted with silver paint. 8.3 Packaging, transportation and storage.
Product packaging, transportation and storage should comply with the regulations of GB/T12252. Additional notes:
This standard is proposed by the Hefei General Machinery Research Institute of the Ministry of Mechanical and Electronic Industry. This standard is under the jurisdiction of the Shenyang Valve Research Institute. , Sichuan Natural Gas Machinery Research and Construction Institute, Chongqing Valve Factory, and Chengdu Valve Factory are responsible for drafting this standard. The drafters are Yu Shu'e, Yuan Shiquan, Zeng Xianli, and Xiao Dadeng 12
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