CB 907-1994 External Thread Bronze Right Angle Liquid Safety Valve CB907-1994 Standard Download Decompression Password: www.bzxz.net

Shipbuilding Industry Standard of the People's Republic of China
CB907-94
External Thread Bronze Right Angle Liquid Safety Valve
Published on 1994-08-—22
Published by China State Shipbuilding Corporation
Implemented on 1995-05-01
Subject Content and Scope of Application
Shipbuilding Industry Standard of the People's Republic of China
External Thread Bronze Right Angle Liquid Safety Valve
CB907-94
Classification Number: U52
Agency: CB907-79
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging and storage and transportation of external thread bronze right angle liquid safety valves (hereinafter referred to as safety valves).
This standard applies to liquid safety valves for fresh water, sea water, lubricating oil, fuel oil pipeline systems and pressure vessels. 2 Reference standards
GB3032—89
CB56--83www.bzxz.net
CB'821—84
CB3021—94
Product classification
Marking of ship piping accessories
Pipe shoulder threaded joint
Low-pressure pipe threaded joint
Safety valve technical requirements and performance test methods The basic parameters of the safety valve are as shown in Table 1.
Working pressure P
>0.25~0.6
China State Shipbuilding Corporation approved the nominal diameter DN on August 22, 1994
1995-05-01 implementation
CB907-94
3.2 The structure and basic dimensions of the safety valve are in accordance with Figure 1 and Table 2.DN
1-valve body, 2-valve cover, 3-spring, 4-valve valve Table 2
Working pressure P
>0.25~0. 6
>0.25~0. 6
>2. 5~3.2
Structural dimensions
Connection dimensions
M36×2
Working pressure P
>0.25~0. 6
>1. 2~1. 6
>0.25~0. 6
>0. 6~0. 9
>1.2~1. 6
>1. 6~2. 5
Structural size
CB 907—94
Continued Table 2
Connection size
M39×2
3.3 Marking example
Working pressure is 0.5MPa, nominal diameter is 15mm bronze right angle liquid safety: Safety valve 2.5-6015CB907—94
4 Technical requirements
4.1 The materials of the main parts of the safety valve are as shown in Table 3.
Part name
Aluminum steel
Aluminum steel
Aluminum bronze
Carbon spring steel wire
The performance requirements of the safety valve shall be in accordance with the provisions of CB3021. 4.2
ZQAL9—2
QAL9—2
QAL9—2
The threaded joint connection dimensions shall comply with the provisions of CB'821 and CB56. 4.3
The safety valve shall be installed vertically on the pipeline.
The strength of the safety valve shall comply with the provisions of CB3021. 4.5
4.6The displacement of the safety valve shall comply with the provisions of CB3021. 5 Test method
The safety test method shall be carried out in accordance with CB3021, 23
Standard number
CB883-89
GB4429-84
GB4429-84
GB435789
Inspection rules
Product inspection is divided into factory inspection and type inspection. 6.1 Type inspection
Type inspection shall be carried out in any of the following situations; White
Product trial production and identification:
CB907-94
After formal production, if there is a major change in the process, which may affect the product performance; During normal production, an inspection shall be carried out periodically or after accumulating 100 units; When the national quality supervision agency puts forward type inspection requirements. 6.2 Type inspection and factory inspection items are as per Table 4 Table 4
Physical and chemical tests for castings
Action grease
Type inspection
Each safety valve shall be inspected item by item as per Table 4 before it can be shipped out of the factory. 7 Marking, packaging and storage and transportation
7.1 The marking shall comply with the provisions of GB3032.
7.2 The packaging shall comply with the provisions of GB600.
7.3 The packaging box shall have shock-absorbing filling blocks.
7.4 Avoid throwing during transportation.
Additional instructions:
Factory inspection
This standard is proposed by the Pipe 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 State Shipbuilding Corporation. This standard is drafted by the 704 Institute of China State Shipbuilding Corporation. The main drafter of this standard: Liu Zhicheng.
This standard is provided with a unified construction drawing.
According to Article 4.1
According to GB600
According to Article 4.5
According to Article 4.2
According to Article 4.6
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