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INSULATING JOINT
-41-
The insulating joint is the key
c o m p o n e n t i n n a t u r a l g a s
distribution and oil transmission,
which is mainly applied in gas
reducing station in gas distribution
field. The main function is to realize
insulation among gas pipelines and
between gas station and pipelines in
order to avoid the corruption from
electricity and chemical reaction
and thus to extend the life of use. .
Features
1 Design according to national standard ie GB150-1998
"steel pressure vessel"
2 Make the strength calculation according to national
standard GB50251-94 "gas pipeline construction design code"
3 The product is designed specifically for the leakage
problem frequently existed in gas transmission line
4 The same excellent characteristics as European level
5 Redundant sealing structure design leading to a more
reliable function
6 Special structure to increase the anti-bending strength
7 Specification:
Suitable for city gas, natural gas, LPG, other
non-corrosive gas
Pressure class: PN25 PN40 PN64 PN100
Ambient temperature: -20 +60
Insulation resistance: 20M
Maximum voltage: 3kv
Working temperature: -10 +50
The real electrical resistance performance of the product is
even better than the above statistics.
Various kinds of gas reducing stations and cabinets
Natural gas & oil transportation pipelines
Application
Certificate
1 National patent: no. ZL99 2 26379.4 , ZL02280202.9
Number of certificate: 378659 587501.
2 Shanghai New Product Award.
3 Test reports: welding performance test report, product
test report, bending & extending test report.
4 Company standard: Q/FcA1006-2002
Applied Standards
Follow the standard JB4726-2000 "forge steel for
pressure vessel".
Follow the standard GB/T8163-1999 "seamless steel
pipe for fluid transportation".
Follow the standard of GB6654-1996 "steel plate for
pressure vessel" and JB4730-94 "on-destruction
inspection".
All the selection of metal material follows the
requirement of related national standards. The physical
performance ie bending or impact test follows the
regulation of standard Gb150.
The soft material is rubber and plastics suitable for
long use, which is approved by the related authority
in China.
The material of the gasket inside insulating joint is a
new type of plastic, which forms a soft substanceto
contact with the gas in order to increase the life of use.
The excellent physical performance of the new plastic
ensures a good. condition even in the worst
circumstance.
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.
.
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.
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Structure
The product is composed by the following parts: upper and
lower pipe, glove pipe, insulating part, sealing part,
insulating painting. Between the upper and lower pipes,
there are insulating part and sealing part thus to form the
double sealing structure.The glove pipe adopts slope
welding or direct welding in order to realize a sealing
"space". .
-43--42-
L
B
A
For example
JY64-400B represents the insulating joint of 6.4MPa press
class and DN400.
Dimensions
JY XX -XX X
PN25 Insulating Joint
TYPE
JY25-25
JY25-25B
JY25-40
JY25-50
JY25-50B
JY25-65
JY25-80
JY25-100
JY25-100B
JY25-125
JY25-125B
JY25-150
JY25-150B
JY25-200
JY25-250
DN40
DN65
DN80
DN200
DN250
A
34
32
48
60
57
76
89
114
108
140
133
168
159
219
273
B
4
4
4
4
4
5
5
5
5
6
6
7
7
7
8
L
250
250
300
350
350
350
400
400
400
500
500
500
500
500
800
specification
DN25
DN50
DN100
DN125
DN150
steel pipe material
DN300
DN400
DN450
DN500
DN600
DN700
DN800
DN350
JY25-300
JY25-350
JY25-350B
JY25-400
JY25-400B
JY25-450
JY25-450B
JY25-500
JY25-500B
JY25-600
JY25-600B
JY25-700
JY25-700B
JY25-800
JY25-800B
325
356
377
406
426
457
480
508
530
610
630
711
720
813
820
8
8
8
8
8
8
8
10
10
10
10
10
10
12
12
800
900
900
900
900
900
900
900
900
1000
1000
1200
1200
1300
1300
TYPEA B L
specification steel pipe material
PN25 Insulating Joint
DN25
DN40
DN50
DN65
DN80
DN100
DN125
DN150
DN200
DN250
DN300
DN350
DN400
DN450
DN500
DN600
DN700
DN800
PN40 Insulating Joint
TYPEA B L
specification steel pipe material
JY40-25
JY40-25B
JY40-40
JY40-50
JY40-50B
JY40-65
JY40-80
JY40-100
JY40-100B
JY40-125
JY40-125B
JY40-150
JY40-150B
JY40-200
JY40-250
JY40-300
JY40-350
JY40-350B
JY40-400
JY40-400B
JY40-450
JY40-450B
JY40-500
JY40-500B
JY40-600
JY40-600B
JY40-700
JY40-700B
JY40-800
JY40-800B
34
32
48
60
57
76
89
114
108
140
133
168
159
219
273
325
356
377
406
426
457
480
508
530
610
630
711
720
813
820
4
4
4
4
4
5
5
5
5
6
6
7
7
7
8
10
12
12
10
10
10
10
12
12
14
14
14
14
16
16
250
250
300
350
350
350
400
400
400
500
500
500
500
500
800
800
900
900
900
900
900
900
900
900
1000
1000
1200
1200
1300
1300
-45--44-
DN25
DN40
DN50
DN65
DN80
DN100
DN125
DN150
DN200
DN250
DN300
DN350
DN400
DN450
DN500
DN600
DN700
DN800
PN64 Insulating Joint
TYPEA B Lspecification steel pipe material
JY64-25
JY64-25B
JY64-40
JY64-50
JY64-50B
JY64-65
JY64-80
JY64-100
JY64-100B
JY64-125
JY64-125B
JY64-150
JY64-150B
JY64-200
JY64-250
JY64-300
JY64-350
JY64-400
JY64-450
JY64-500
JY64-600
JY64-700
JY64-800
Note
1.the steel pipe shall be provided by the customer
34
32
48
60
57
76
89
114
108
140
133
168
159
219
273
325
355.6
406.4
457
508
610
711
813
4
4
4
4
4
5
5
5
5
6
6
7
7
8
10
12
8.8
10
11
12.5
16
17.5
20
250
250
300
350
350
350
400
500
500
600
600
600
600
600
800
800
1000
1000
1000
1200
1200
1300
1300
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