This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging of flanged cast iron right angle safety valves with flange connection dimensions in accordance with GB 569 and GB 2501. This standard is applicable to ship piping systems with media such as fresh water, sea water and steam with a temperature not exceeding 220°C. CB 304-1992 Flange Cast Iron Right Angle Safety Valve CB304-1992 Standard download decompression password: www.bzxz.net

Shipbuilding Industry Standard of the People's Republic of China
CB 304-92
Flanged Cast Iron Right Angle Safety Valve
Published on August 21, 1992
China State Shipbuilding Corporation
Implemented on May 1, 1993
Shipbuilding Industry Standard of the People's Republic of China
Flanged Cast Iron Right Angle Safety Valve
Subject Content and Scope of Application
CB 304-92
Classification Number: IJ52
Replaces C13-30477
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging of flanged cast iron right angle safety valves (hereinafter referred to as safety valves) with flange connection sizes in accordance with GB569.GB2501. This standard applies to ship piping systems with the medium being fresh water, seawater and steam with a temperature not exceeding 220C. 2 Reference standards
GB569 Marine flange connection dimensions and sealing surface General technical conditions for marine pipeline valves
GB1239.2 Technical conditions for cold-rolled spiral compression springs Marine flange connection dimensions and sealing surface (four-digit) GB2501
Standards for marine pipeline accessories
GB3032
GB 11698
Structural length of marine flange-connected metal valves CB3021
Test technical requirements for pipeline safety valves
ZB/TUJ52001 Wall thickness of marine casting valves 3 Product classification
3.1 The classification of safety valves is as follows:
Flange connection dimensions are in accordance with GB569 right-angle safety valves; BS type——flange connection dimensions are in accordance with GB 2501 right-angle safety valves. 3.2 The basic parameters of safety valves are specified in Table 1. Table
B, BS
3.3 Structural dimensions of safety valves
Working pressure P
0. 1-6. 9
2 0. 3 ~ 0. 6
-0. 6--0. 5www.bzxz.net
D. 9-~1. 6
3.3.1 The structural dimensions of type B safety valves shall be as specified in Figure 1 and Table 2. 3.3.2 The safety width structure size of BS type is as specified in Figure 1 and Table 3. Approved by China Shaoxing Shipbuilding Industry Corporation on August 21, 1992, and implemented on May 1, 1993. CB 304-92 Figure 1 Type, BS Type Working pressure P 3~0. 6>0. 6~P, 9 0. 1-~0. 3-0. 6>0. 6--0. S 0. 1-- 0. 3>0. 3>0. 6>0. 6>0. 6~ 0. 9 0. 1~0. 3
>0. 3--0. 6
E0. 6~ 0. 9
1, 9--1. 6
>0. 3~0. 6
>0. 6~-0. 5
0. 1-- 0. 3
≥0. 3~0. 6||tt| |0. 6--0. 9
T operating pressure P
0, 3 ~-0. 6
>0. 6~0. 6
-11, 6-~1. 9
i. 1-- 0. 3
11. 3 ~- 0. 6
-0. 6 --0. H
-0. 9--1. 6
0. 1~-0. 3
:0. 3~0.
0. 6~0. 9
0. 1 --0. 3
: 0. 3-- 0. 6
0. 6--0. 9
Outline dimensions
Outline dimensions
CB 304—92
Flange connection dimensions
Flange connection dimensions
.17.10
3.4 ​​Marking examples
CB30492
Working pressure is 0.25MPa, nominal diameter is 40mm, according to the flange connection dimensions and sealing surface of GB569. Right-angle safety valve: Safety valve B1~3040CB 304--92
Working pressure is 0.5Mu+Nominal diameter is 50mm, according to the flange connection dimensions and sealing surface of GB2501<four-digit) Right-angle safety valve:
Safety valve BS3~6050
4 Technical requirements
CB 304—92
4.1 The manufacturing technical requirements of safety valves shall be in accordance with GB 600. 4.2 The main components and materials of safety valves shall be in accordance with Table 4. Table 4
Parts name
Valve body, valve cover
Gray cast iron
Cast brocade
Aluminum steel
Spring steel wire
4.3 Flange connection dimensions shall comply with GB569 and GB2501.4.413S type safety valve, its structural length shall comply with GB11698.4.5 Safety valve test technical requirements shall comply with CB:3021.4.6 The valve stem of the safety valve shall comply with the test methods and inspection rules of B/TU52001.
The items of type inspection and delivery inspection shall comply with the provisions of Table 5.5.1
Determination of mechanical properties of parts
Appearance inspection
Strength water pressure test
Performance test
5.2 Each safety valve shall be inspected item by item according to Table 5 before leaving the factory. 6 Marking and packaging
6.1 The marking of safety valves shall be in accordance with GB3032.
6.2 The packaging of safety valves shall be in accordance with CB 600.
Standard No.
2Q5m10-2
QAl9-2
605i2Mn
Connect GB9133
Conform to GB600
Conform to GB1239,2
Connect to CB'3021
GR 939
GR4429
GR6218
Additional remarks:
CB 304--92
This standard is proposed by the Pipe System Accessories Sub-Technical Committee of the National Technical Committee for Standardization of Marine Machinery. This standard is under the jurisdiction of the 603 Institute of China Shipbuilding Industry Corporation. This standard was drafted by Dalian Ship Design Institute. This standard mainly includes: adding flange connection dimensions that meet the specification series of GB 2501. This standard is provided with unified construction drawings.
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