JB/T 990-1977 Welded tee pipe joint body

Basic Information

Standard: JB/T 990-1977

tandard name: Welded tee pipe joint body

Standard category:Machinery Industry Standard (JB)

state:in force

release date:1977-01-17

Implementation date:1977-05-01

standard classification number

Standard Classification Number:Machinery>>General Parts>>J15 Pipe Accessories

associated standards

alternative situation:JB 990-1967; replaced by JB/T 966-2005

Publication information

other information

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Introduction to standards:

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

Some standard content:

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||A4bzxz.net
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
0
—1.60
361
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