On Board CNG

The CNG tanks have cylindrical shape and are manufactured to tolerate a working pressure of 200 bar. Various CNG cylinders are available with different diameters and lengths. CNG cylinders are also produced in various specifications, according to the technical features required by different countries.

Research indicates that CNG cylinders can provide safe and reliable fuel storage on a vehicle if properly installed, protected, filled, and maintained. Owner or operators are strongly encouraged to implement practices within their fleets to ensure that CNG cylinders provide safe operation over the life of the vehicle.

Natural gas vehicles with compressed natural gas (CNG) cylinders should be periodically subject to either a general or in-depth inspection to assess the CNG cylinder condition and fitness for continued service. Different countries have different norms for rechecking of cylinders periodically.

On Board CNG Size Chart

Nominal water
capacity
Gas capacity
Cu.m.(Approx)
Diameter
mm
Length 'L'mm
Approximate
Weight (Kg.)
20
5
232
650
25
22
5.4
232
700
28
25
6.3
232
780
32
28
7
232
860
34
30
7.5
232
910
37
50
12.5
232
1450
54
30
7.5
267
725
36
35
8.75
267
825
40
40
10
267
925
44
45
11.25
267
1025
49
50
12.5
267
1125
53
60
15
267
1325
62
75
18.8
267
1625
77
80
20
267
1720
81
100
25
267
2120
97
45
11.3
317
770
49
50
12.5
317
840
52
55
13.8
317
910
57
60
15
317
980
61
65
16.3
317
1050
64
70
17.5
317
1120
69
75
18.8
317
1190
72
80
20
317
1260
76
90
22.5
317
1400
84
100
25
317
1500
92
57
14.3
356
790
64
60
15
356
815
66
62
15.5
356
840
67
63
15.75
356
850
68
65
16.3
356
870
69
70
17.5
356
925
76
75
18.8
356
980
80
77
19.3
356
1010
82
78
19.5
356
1020
83
80
20
356
1035
84
82
20.5
356
1070
86
85
22.5
356
1105
89
90
22.5
356
1145
91
100
25
356
1255
99
110
27.5
356
1380
108
113
28.3
356
1400
108
135
33.75
356
1655
127
150
37.5
356
1820
135
70
17.5
406
760
86
90
22.5
406
930
102
100
25
406
1015
110
110
27.5
406
1100
118
120
30
406
1180
126
140
35
406
1340
141
198
49.5
406
1820
182
200
50
406
1845
185