JB/T 990-1977 Welded tee pipe joint body JB/T990-1977 Standard download and decompression password: www.bzxz.net

Standard welded tee pipe joint body of the First Ministry of Machinery Industry of the People's Republic of China
Marking example,
Tee pipe joint body with pipe outer diameter 28mm: joint body 28JB990--77||tt ||The First Ministry of Machinery Industry of the People's Republic of China issued the Standardization Research Institute of the First Ministry of Machinery Industry to propose 369
JB 990--77
instead of JB 990-67
the remaining 2|| tt||A4
Implemented on May 1, 1977
Jinan Casting and Forging Machinery Research Institute and others drafted Zengzi Foreign Economics
10
14
18
22
28
34
42
50
do
3
10|| tt||12
15
20
25
32
36
d
province||tt| |Male
Size
8
11
16
20
24
30
35
40
45
Difference
-0,20
0.34
dz
M12×1.25||tt ||M16×1.5
M22×1.5
M27×1.5
M30×1.5
M36×2
M42×2
M52×2
M60×2
The technical conditions are in accordance with JB1003-77. JB 990 --77
dg
10
14
19
23
26
32||tt ||38
48
56
L
8
8
10
10
11
13
16
18
20
L2
18
21
26| |tt||28
32
37
45
52
60
B
7||tt ||10
14
18
20
25
30
36
42
1.4
1.8
2.4
r
4
mm
s
nominal dimensional tolerance
10
14
19
24
27
32
41
50
60| |tt||0
-0.70
0
-0.84
0bzxz.net
—1.60
361
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.