JB/T 81-1994 Raised panel flat welded steel pipe flange

This standard specifies the types and dimensions of steel pipe flanges for convex panel flat lamps with nominal pressures PN of 0.25, 0.6, 1.0, 1.6, and 2.5MPa. This standard is applicable to convex plate flat welded steel pipe flanges with nominal pressure PNO.25~2.5MPa. JB/T 81-1994 Convex panel flat welded steel pipe flange JB/T81-1994 Standard download and decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
Convex panel flat welded steel pipe flange
Theme content and scope of application
JB/T81...94
Generation 8i
This standard specifies the type and dimensions of convex plate flat welded steel pipe flanges with a nominal medical strength PN of 0.25.0.6.1.0.1.6.2.5MPa.
This standard applies to convex plate flat welded steel pipe flanges with nominal pressure PN0.25~2.5MPa. 2
Quoted standards
JB/T74 pipeline flange technical conditions
3 The type and size of the flange should comply with the regulations in Figure 1 and Tables 1 to 5. The technical requirements of the small
Figure 1
method are in accordance with the provisions of JB/T74. 4
The nominal pressure of the flange and the maximum allowable working pressure at different temperatures are in accordance with the provisions of Appendix B of JB/T74. 5
6 Marking Example
Convex sheet-type flat-welded steel pipe manufacturing method with nominal diameter 100mm, nominal pressure 2.5MPa, size series 2: Method 100-25JB/T 81---94
Convex plate flat welded steel pipe with nominal diameter 100mm, nominal pressure 2.5MPa, size series 1. Legal benefit: flange 100-25 (series 1) JB/T81-94 Ministry of Machinery Industry of the People's Republic of China Approved on 1994-12-09 354
Implemented on 1995.10-01
Nominal
Diameter
-.|| tt||1
6.3||tt| |80
Outer diameter
14||tt ||1.8
(175) 194
(225)| |tt||245
600||tt ||70
1020| |tt||1220
Flange outer diameter
JB/T 81 .- 94
Table 1PNo.25MPa convex panel type flat welded steel pipe flange traces ||80
190/185||tt ||210/205
240/235
265/260
320/315
375/370| |tt||440/435
490/485
540/535
595/590
645/6-10
755||tt ||860
1 790/1 785
diameter| |tt||K
110||tt ||130
810| |tt||920
continue
end||tt ||Screw hole diameter
Series 1/Series 2
12||tt| |14
23|| tt||26/25
Bolts, studs
Quantity
12| |tt||12
24||tt ||28
Thread Th.
Series 1/Series 2
M16| |tt||M16
M20||tt ||M20
M24/M22
M24/M22
Dense surface size
4||tt| |50
145||tt| |175
1280|| tt||1480
3||tt| |3
法盖法》
肉很||tt| |F
22|| tt||H
75||tt| |T1
：328
184| |tt||634
112||tt ||1G24
3.49||tt ||3.86
10| |tt||15
80||tt ||100
300| |tt||350
900||tt ||1000
25||tt| |32
480|| d| |tt||JB/T 81-94
表2PNO.60MPa凸表式式平没钢制管谢机制作连
螺梓孔
中心圆
系系1/系系2
140||tt ||160
190/185
210/205
240/235
265/260
320/315| |tt||340
375/370
440/435
490/485
540/535
595/590
645/640
diameter
150| |tt||170
395||tt ||445
1120. |tt||12
18||tt ||18
30||tt ||寸
quantity
8| |tt||12
24||tt ||24
螺梓、螺柱
螺纹Th.
系系1/系系2
M12||tt| |M12
M24/M22
M24 /M22
工业面包装
40||tt| |50
462|| tt||518
2||tt| |3
5|| t | tt||12
16||tt| |18
34|| tt||36
59||tt| |75
824|| tt||924
0.31||tt ||0.34
4. 47||h||5.54||h||6.07||h||6.60||h||8.03||h||10.30||h||12.59||h||15.20||h||17.59| |tt||20.67
通很|| tt||DN
50||tt| |65
(225)|| tt||250wwW.bzxz.Net
管子||tt| |外很
245| |tt||273
蛋外很
JB/T81-94
3PN1.0MPa凸光式平没钢制管蛋线包装表3
螺梓孔
中心圆
系系1/系系2
140/135| |tt||150/145
165/160
185/180
200/195
220/215
250/245||tt ||285/280
340/335
395/390
445/440
505/500| |tt||565
diameter
65||tt ||75
515| |tt||565
螺栓孔化合
1| |tt||寸
quantity
系列1/系列2
23| |tt||23
26/25
8| |tt||12
螺梓、螺柱
螺纹Th.
系系1/系系2
M16||tt| |M16
M24/M22
M24/M22
M24/M22
工业面包装
45|| tt||55
153||tt| |185
2|| tt||3
3||tt| |3
艺艺艺
24| |tt||15
75||tt ||91
276| |tt||mm
4.01| |tt||5.40
43021.80| |tt||484
公称||tt ||通很
40||tt| |50
200||tt| |(225)
600||tt| |子
245| |tt||1273
358||tt ||色外很
JB/T 81-94
表4PN1.6MPa凸光式平没钢制管色制制连
中心圆
系系1/系系2：
140/135
150/145
1657160
185/180
200/195
220/215
250/245
285/280| |tt||310
3407335
640||tt ||715/705
diameter
100||tt ||110
770| |tt||接
軺没孔化合
系列1/系列2
14| |tt||11
18||tt ||18
26/25| |tt||26/25
16| |tt||16
軺梓、螺柱
軺纹T
系系1/系系2
M12| |tt||M12
M16||tt ||M16
M24/M22
M24/M22| M24/M22 ||法“法》
小明「内很
265| |tt||295
718|| tt||3
4||tt| |11
30||tt| |1
0.87|| tt||1.18
30||tt ||32 276
30 33. 30
56||tt ||531
100||tt| |450
25||tt| |32
艺外外很
JB/T81--.94
PV2.5MPa凸光式式乎没钢制管法盖化学连
螺梓孔
中心國
diameter
系系1/系系2
95||tt| |105
140/135
150/145
165/160
185/180
200/195|| tt||235/230
485|| tt||5557550
620/610
6707660
75|| tt||85
220||tt| |250
螺梓孔化合
系列1/系列2
14|| tt||14
23||tt| |26/25
30||tt| |34
軺梓、螺柱
quantity
4||tt ||4
20| |tt||軺纹Th
系系1/系系2
ME||tt| |M16
M24/M22
M24/M22
M24/M22
M24/M22
M33/M30
M33/M30|| tt||M33 / M36
248|| tt||278
610||tt| |2
法法益
原内任
21| |tt||26
31| |tt||36
39||tt ||59
4.50||tt| |248
328 26-60
34.3.||tt ||.(
Note: The flange connection dimensions of Series 1 in Tables 1 to 3 are different from the national and German flange standard dimensions: Series 2 Dimensions of the original machine standard method: New household product design should give priority to the series! (The theoretical quality of the flange listed in Table 2~Table 5 refers to the series 2 method. Additional instructions:
This standard was proposed and managed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry. The main drafters of this standard were Li Junying, Wu Zhenjia, and Zhang Fenglin359
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