This standard specifies the requirements, quality assurance regulations and delivery preparation for high-pressure air right-angle stop valves with bottom flanges (hereinafter referred to as stop valves) with nominal pressures of PN20, OMPa, PN25, and OMPa. This standard applies to the high-pressure air system of submarines. CB 592-1996 Specification for high-pressure air right-angle stop valves with bottom flanges CB592-1996 Standard download decompression password: www.bzxz.net

China State Shipbuilding Corporation Department Standard
CB 592-96
Specification for high-pressure air right-angle stop valve with bottom flange 1996-09-03 Issued
China State Shipbuilding Corporation
Implementation on 1997-04-01
1 Scope
China State Shipbuilding Corporation Department Standard
Specification for high-pressure air right-angle stop valve with bottom flange 1.1 Subject content:
CB 59296
Classification number: U52
Replacement: CB592-G7
This specification specifies the requirements, quality assurance provisions and delivery preparation for high-pressure air right-angle stop valves with bottom flanges (hereinafter referred to as stop valves) with nominal pressures of PN20.0MIPa and PN25.OMPa. 1.2 Scope of application:
This specification applies to the high-pressure air system of submarines. Reference documents
GB60091
GB3032—89
CB31664
3 Requirements
Structure and specifications
General technical conditions for ship pipeline valves
Marking of ship pipeline accessories
High-pressure air pipe threaded joints
Basic parameters of stop valves are as shown in Table 1.
Public pressure PN
20.0.25.0
China State Shipbuilding Corporation 1996-09-03 issued Table 1
Public ring diameter DN
Applicable media
High-pressure air
1997-04-01 implementation
3.1.2 The structural dimensions of the stop valve are as shown in the figure below and Table 2. CB 592—96
1——Wide body; 2——Valve disc; 3—; 4 Wide rod Table 2
Structural dimensions
408205
3.2 Marking example
Threaded joint dimensions
Flange connection dimensions
For measurement
Nickel brass with bottom flange high-pressure air right-angle stop valve 20020H with nominal pressure of 20. 0MPa and nominal diameter of 20mm
Cut-off width
CB 592—96
CB 592-- 96
Stainless steel high-pressure air right-angle stop valve with bottom flange and nominal pressure of 25.0MPa and nominal diameter of 32mm: CB592-96
25032N
Stop valve
Nickel copper high-pressure air right-angle stop valve with bottom flange and nominal pressure of 25.0MPa and nominal diameter of 32mm: CB592-96
Stop valve
25032H
3.3 Materials
The materials of main parts are as shown in Table 3.
Parts Name
Inlaid Huang Yi
Tao Qing Steel
20.0MPa.25.0MPa
HNi56-3
QAL10—3—1.5
G5232--85
GB5233-85
Ultra-low carbon stainless steel
Stainless steel
Aluminum bronze
The mechanical properties and chemical composition of ultra-low carbon stainless steel materials shall meet the following requirements: 3. 3. 2www.bzxz.net
a. Mechanical properties d. 2-400MPa d. 650MPa.og-25% b. Chemical composition according to Table 4.
4. 7 ~ 7.5
2.5～3. 0
The technical requirements for stop valves shall be in accordance with GB600.
The main parts of the stop valve must be forged or made of profiles. The threaded joint size of the stop valve shall be in accordance with CB316.
1C-17Ni2
@A10 .- 3 - 1. 5
GB 1220—R4
GB 4429 -- 89
.0.025
The stop valve body and valve body are subjected to strength hydraulic test together. Test pressure Ps=1.5P, maintain pressure for 10min, there should be no leakage. After the stop valve is assembled, a hydraulic sealing test shall be carried out. Test pressure P, =1.25Pn, when the stop valve is closed and opened, pressurize under the valve disc, the pressure duration is not less than 10min, there should be no leakage. 3.4.6 Air pressure sealing test. Test pressure P.=PN, when the stop valve is closed and opened, pressurize under the valve plate, the pressure duration is not less than 10min, there should be no leakage.
3.5 Appearance
The outer surface of the stop valve should be smooth and flat, and no defects such as dents and burrs are allowed. 4 Quality Assurance Provisions
4.1 Inspection Responsibility
CB 592-96
The stop valve shall be inspected by the technical inspection department of the manufacturer, and the stop valve submitted for acceptance must comply with the requirements of the construction drawings and Chapter 3 and Chapter 5 of this standard.
4.2 Inspection Method
4.2.1 The stop valve shall be subjected to hydraulic strength test according to the requirements of B600, and the results shall comply with the provisions of Article 3.4.4. 4.2.2
The stop valve shall be tested for hydraulic and pneumatic sealing in accordance with GB600, and the results shall comply with the requirements of 3.4.5 and 3.4.6. 5 Delivery preparation
Before packaging, the stop valve flange sealing surface shall be covered with a cover plate, and the thread shall be covered with a sleeve. 5.2 Packing
The stop valve shall be packed before leaving the factory. There shall be a packing list in the box, and the following contents shall be indicated on the packing list: Product name, standard number:
Nominal pressure. Nominal diameter:
Quantity per box
d. Product certificate number.
5.3 Storage
The stop valve shall be placed in a dry room, and it is not allowed to store it in the open air or stack the product. 5.4 Marking
The marking of the stop valve shall comply with the requirements of GB3032, and shall have the standard number, inspection stamp and manufacturing mark. Additional notes:
This specification is proposed by the Comprehensive Technical and Economic Research Institute of China State Shipbuilding Corporation. This specification is under the jurisdiction of Wuchang Shipyard of China State Shipbuilding Corporation. This specification is drafted by the 7th () 4th Research Institute of China State Shipbuilding Corporation, and the 603rd Research Institute participated in the drafting. The main drafter of this specification is Chen Weili.
Project code: 942802.
This specification is provided with unified construction drawings.
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