JB/T 999-1977 Hinged bolts for pipe joints

Basic Information

Standard: JB/T 999-1977

tandard name: Hinged bolts for pipe joints

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 999-1967

Publication information

publishing house:Machinery Industry Press

Publication date:1977-05-01

other information

Drafting unit:Jinan Foundry and Forging Machinery Research Institute

Focal point unit:Mechanical Standardization Institute

Publishing department:First Ministry of Machinery Industry of the People's Republic of China

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Introduction to standards:

This standard only specifies the hinge bolts for welding, ferrule and flared pipe joints. JB/T 999-1977 Hinged bolts for pipe joints JB/T999-1977 Standard download decompression password: www.bzxz.net

Some standard content:

Ministry of Machinery Industry of the People's Republic of China
Ministry Standard
Hinged Bolts for Pipe Joints
This standard only specifies hinge bolts for welding, ferrules, and flared pipe joints. -da90° cross uniform distribution
4
30H
Marking example:
L
DI≥0.95S
Thread diameter d22mm, Hinge bolt with pitch 1.5mm and length 48mm: Bolt M22×1.5×48JB999--77
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 and proposed 6
JB 999 —77
Replacing JB999-67
The remaining 3
Implemented on May 1, 1977
Drafted by Jinan Casting and Pressure Machinery Research Institute and others d
M10x1
M14x1.5
d.
4
d3
4
8
7
11
M18x 1.51
9| |tt||(M20×1.5)(12)(10)
M22×1.5114
12
(M24 ×1.5)
(16(13)| |tt||M27×2
M33×2
M42×2
M48×2
18
22
28| |tt||31
14
14
17
20
2
2
2||tt ||2
4
H
6
7
8
9
to
12
14
18
4
JB 999—77
mm
S
Nominal dimensional tolerance|| tt||L
25
28
17
19
24
(27)
30|| tt||(32)
36
41
55
60
Note: Dimensions in () are limited to technical conditions for agricultural machinery pipe joints. According to the regulations of JB1003~—77 -0.24
-0.28
30
32
35
32
L1||tt ||35
11
42
38
40
45
48
48
50
60
55
60
- 0.34 + 70
65
70
75||tt| |75
85
-0.40
95
14
(16)
17
(19)| |tt||21
17
21
Total 2 assets No. 2
IL3La
L2
119||tt| |22
11
14
16
(17)
18
(19
20||tt ||19121
24
241
28
22bzxz.net
25
24
26
29
25
28
35
30
32
37
40
39| |tt||41
51
43
48
58
57
62
67||tt ||65
75
83
D
19.610.5
21.91 0.8
27.9
0.8|| tt||(31.2)
34.6
(36.9)
41.6
1
1.2
47.31.2||tt| |63.5
1.2
69.3
115
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