CB/T 3196-1995 in English

1 Subject Content and Application Scope

This standard specifies the classification, technical requirements, test methods, inspection rules, marking and packaging of flange cast steel sea water stop valve (hereinafter referred to as stop valve) with flange connection dimension in accordance with GB 569 and GB 2501.
This standard is applicable to the marine pipeline system with fresh water and sea water as the medium.

2 Normative References

GB 569 Marine Pipe Flanges - Connection Dimensions and Mating Face
GB 600 General Specifications for Marine Piping Valves and Fittings
GB 2501 Marine Pipe Flanges - Connection Dimensions and Mating Face
GB 3032 Marks for Marine Piping Valves and Fittings
GB 11698 Metal Valves for Use in Marine Flanged Pipe Systems - Face-to-face and Centre-to-face Dimensions
ZB/T U52 001 Wall Thickness of Casting Body for Marine Valve

3 Product Classification

3.1 Type
The types of stop valve are specified as follows:
Type A - through-type stop valve with flange connection dimension and sealing face in accordance with GB 569.
Type AS - through-type stop valve with flange connection dimension and sealing face in accordance with GB 2501.
Type B - perpendicular-type stop valve with flange connection dimension and sealing face in accordance with GB 569.
Type BS - perpendicular-type stop valve with flange connection dimension and sealing face in accordance with GB 2501.
3.2 Basic parameters
See Table 1 for the basic parameters of stop valve.

Table 1
Type Nominal pressure PN
MPa Nominal diameter DN
mm
A, AS, B and BS 1.6 40~150
1.0 65~150
0.6 200~250
3.3 Structural dimension of stop valve
3.3.1 See Figures 1 and 2 and Table 2 for the structures and basic dimensions of Type A and Type B stop valves.

Figure 1 Type A and Type AS Figure 2 Type B and Type BS

Table 2
mm
Nominal pressure
MPa Nominal diameter
DN Structure dimension Flange connection dimension Hand wheel Lift
m Weight
kg
Type A Type B D D1 D2 d0 b n Th. D0 S Type A Type B
H L H L L1
1.6 40 260 200 235 90 90 125 93 74 15 13 6 M14 120 11 12 9 8
50 288 230 258 95 95 135 103 84 140 12 15 11 10
65 335 290 301 115 115 170 132 110 17 15 8 M16 160 14 19 19 17
80 366 310 325 125 125 185 147 126 16 200 17 23 25 22
100 427 350 378 150 135 205 167 146 10 250 22 28 36 32
125 465 400 405 175 155 225 187 168 250 22 35 60 56
150 524 480 452 180 160 255 217 196 12 280 24 42 81 73
1.0 65 310 290 277 115 115 155 123 104 15 14 6 M14 140 12 19 17 16
80 345 310 304 125 125 170 138 118 8 160 14 23 20 19
100 374 350 325 150 135 190 158 138 180 14 28 29 25
125 426 400 366 175 155 215 183 164 10 200 17 35 39 35
150 487 480 415 180 160 240 208 190 12 200 17 42 52 43
0.6 200 630 600 524 275 225 295 264 247 15 360 27 68 85 70
250 743 730 612 325 275 365 327 306 17 16 14 M16 450 32 80 134 114
3.3.2 See Figures 1 and 2 and Table 3 for the structures and basic dimensions of Type AS and Type BS stop valves.

Table 3
mm
Nominal pressure
MPa Nominal diameter
DN Structural dimension Flange connection dimension Hand wheel Lift
m Weight
kg
Type AS Type BS D D1 D2 d0 b n Th. D0 S Type AS Type BS
H L H L L1
1.6 40 260 200 235 115 115 150 110 88 18 18 4 M16 120 11 12 10 9
50 288 230 258 125 125 165 125 102 20 140 12 15 12 10
65 335 290 301 145 145 185 145 122 160 14 19 20 18
80 366 310 325 155 155 200 160 133 8 200 17 23 26 21
100 427 350 378 175 175 220 180 158 22 250 22 28 37 33
125 465 400 405 200 200 250 210 184 250 22 35 62 57
150 524 480 452 225 225 285 240 212 22 24 M20 280 24 42 90 87
1.0 65 310 290 277 145 145 185 145 122 18 20 4 M16 140 12 19 20 18
80 345 310 304 155 155 200 160 133 8 160 14 23 26 21
100 374 350 325 175 175 220 180 158 22 180 14 28 37 33
125 426 400 366 200 200 250 210 184 200 17 35 62 57
150 487 480 415 225 225 285 240 212 22 24 M20 200 17 42 90 87
0.6 200 630 600 524 275 275 320 280 258 18 22 M16 360 27 68 100 95
250 743 730 612 325 325 375 335 312 24 12 450 32 80 140 130
3.4 Labeling examples
The through-type flange cast steel sea water stop valve with nominal pressure of 1.6MPa, nominal diameter of 40mm, flange connection dimension and sealing face in accordance with GB 569 is labeled as:
Stop valve A16040 CB/T 3196-1995
The perpendicular-type flange cast steel sea water stop valve with nominal pressure of 1.0MPa, nominal diameter of 100mm, flange connection dimension and sealing face in accordance with GB 2501 is labeled as:
Stop valve BS10100 CB/T 3196-1995

4 Technical Requirements

4.1 The technical requirements of stop valve shall meet the requirements of GB 600.
4.2 The materials for main parts of stop valve are in accordance with those specified in Table 4.
Table 4
Parts name Material
Name Designation Standard No.
Valve body and valve deck Cast steel ZG230-450 CB 772-86
Valve disk Cast tin bronze ZQSn10-2 CB 883-83
Vale rod Aluminum bronze QAl9-2 GB 4429-84
Valve seat Cast aluminum bronze ZQAl9-2 CB 883-83
4.3 The flange connection dimension and sealing face of stop valve comply with those specified in GB 569 and GB 2501.
4.4 The structural lengths of Type AS and Type BS comply with those specified in GB 11698.
4.5 The wall thickness of stop valve complies with those specified in ZB/T U52 001.

5 Test Methods and Inspection Rules

5.1 The test methods of stop valve shall meet the requirements of GB 600.
5.2 The end-of-manufacturing inspection items and requirements of stop valve shall comply with those specified in Table 5.
Table 5
No. Item Requirements
1 Mechanical property determination and chemical composition analysis of casting Comply with CB 772
2 Appearance inspection Comply with GB 600
3 Strength test
4 Sealing test
5.3 Each group of stop valves may leave the factory only when all items in Table 5 are acceptable.

6 Marking and Packaging

6.1 The marking of stop valve complies with the requirements of GB 3032.
6.2 The packaging of stop valve complies with the requirements of GB 600.

1 Subject Content and Application Scope
2 Normative References
3 Product Classification
4 Technical Requirements
5 Test Methods and Inspection Rules
6 Marking and Packaging
Additional Information