This standard specifies the materials and dimensions of pipe flanges, plus surface roughness and technical requirements for testing, inspection and acceptance. This standard is applicable to steel pipe flanges specified in JB/T 79-86. JB/T 74-1994 Technical Conditions for Pipe Flanges JB/T74-1994 Standard download and decompression password: www.bzxz.net

J15 | |tt||1995-10-01
e
1/4
1
2
question
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1221
GB
1591
GB
GB2100
GB3077
GB3274||tt| |GB4237
GB4238
GB/T
7659
JB2640
JB755
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3.1 channels||tt ||3.2 Wine
3.3
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JB/T741994
1995-10 -01
1
2
3
4
5
6
7
8
4
p
p
p
4.1
4.2 cars
2
A| |tt||AE·
Q235-A
Q235-B
Q235-C
20625
ZG230-450
16MnR
16Mn15MnV
12CrMof15CrMo
ZG20CrMo
12Cr2Mo1
ZG20CrMoV
12Cr1MoV
ZG15Cr1Mo1V
1Cr5Mo|| tt | tt| |2 bottles
3 generations
JB/T741994
#1
A
GB3274
GB 700
GB 711
JB755
GB/T7659
GB150
JB755
JB755
JB2640
JB755
JB2640
JB755
JB2640
JB755
GB4237
GB4238
GB1221
JB755
GB 2100
PN
MPabar
2.5 yuan 25 pictures
P20.0200
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300
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550
575
600
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18C50
CA50
DN250
DN300
UDN50
DN65~DN150||tt ||DN200-DN300
DN350~DN600
YDN700
UDN125
DN150~DN800
JDN100
DN125~DN400||tt ||DN450~DN600
DN700-DN1000
DN1200
UDN150
DN200~DN500
DN600DN1200
DN1400-DN1600||tt ||DN250
DN300
+2
0
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0
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A3.0
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mm
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JB/T741994
#2
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% Disease
2
3
4
5
DDN800
PDN800| |tt||M10~M24
M27~M33
M36~M56
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DN125
UDN500
DN600~DN1200
YDN1400
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0
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mm
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5.1 must
5. 2 cream
5.3 blood pain Verification
%
6 I want
6.1 must
6. 2 things list
7 thoughts
8
8.1讯脑
画
8.2 黄血罪
9光熙路
9.1放府
9.1.1
9.1. 2 单
20m
A
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F
23
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JB/T741994||tt| |#3
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#4
PN
MPatable?
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A0.2| |tt||A 0.13
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9.6必
10
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b.
c.
PN自
6
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JB/T741994
4
A1
A2
AAAA
Q235-A
35
35CrMo
25Cr2MoVA
25Cr2Mo1VA
20Cr1Mo1VNbB
20CrIMo1VTiB
2Cr12WMoVNbB
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A1
JB/T741994
A
#A1||tt ||PN
MPatbar
2.5元25圈
6.3毛63圈
20.0元2000
300
500||tt ||550
570
600
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B1密应
意
B2
B3鞭痴| |tt||PN
MPatable
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25
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100
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20.0
200
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JB/T79~86水就
JB/T741994
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200||tt| |0.25
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0.60
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1.00
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1.60
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250
0.23
2.3
0.54
5.4
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1.40
中14.0
2.30
25.0%\
23.0
4.00
3.50||tt ||40.0*35.0元
6.30
63.0
10.00
中
5.40
54.0
9.00|| tt||100.0%90.0元
16.00
460
20.00
00
14.00
140
18.00| |tt||180
300
0.19
8.9
0.48
4.8.
0.75
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12.0
1.90
19.0
3.00
30.0
4.80
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120
15.00
150
350
0.17
1.7
0.40
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0.66
6.6
1.10
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1./0| |tt||17.0
2.60
26.0
4.00
40.0
6.60
65
66.0||tt ||11.00
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13.00
130
400
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425
MPatbar
0.15
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0.37
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0.58
5.8
0.90
9.0送||tt ||1.50
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2.30
@23.0
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5.80||tt ||@58.0
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90
11.50
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1.3||tt| |0.32
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B1~± B6E
435
0.11
A.1
0.28
2.8
0.45||tt ||4.5
0.70
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1.10
11.0%
1.80
18.0%
2.80|| tt||中
28.0
4.50
45.0
7.00
0
9.00
0||tt| |445
0.10
8.0
0.25
2.5
0.42
8.2
0.62
5.2
1.00
10.0%
1.60
?16.0%
2.50
25.0
4.20
42.0
6.20
2
8.40
4
455
0.09| |tt||1.9
0.23
2.3
0.36
8.60
0.57
5.7
0.90||tt ||9.0
1.40
?14.00
2.30
￥23.0
3.60
?36.0
5.70|| tt||7
7.20
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