CB 593-1996 Specification for high pressure air right angle stop check valve with bottom flange CB593-1996 Standard download decompression password: www.bzxz.net

Department Standard of China State Shipbuilding Corporation
CB593--96
Specification for high-pressure air right-angle stop-check valve with bottom flange
Published on September 3, 1996
China State Shipbuilding Corporation
Implementation on April 1, 1997
Department Standard of China State Shipbuilding Corporation
Specification for high-pressure air right-angle stop-check valve with bottom flange 1 Scope
1.1 Subject Content
CB593-96
Classification Number: U52
Replaces CB 593-67
This specification specifies the requirements, quality assurance provisions and delivery preparation for high-pressure air right-angle stop-check valve with bottom flange (hereinafter referred to as stop-check valve) with nominal pressure PN20.0MPa and PN25.0MPa. 1.2 Scope of application
This specification applies to the high-pressure air system of ships. References
GR 600-91
GB 3032-89
GB316-64
3 Requirements
3.1 Structure and specifications
General technical system of ship pipeline valves
Marking of ship pipeline accessories
High-pressure air pipe threaded joints
Basic parameters of stop and check valves are shown in Table 1. Table 1
Nominal pressure
20.0.25.0
Nominal diameter
15 ~ 32
The structural dimensions of stop and check valves are shown in the following figure and Table 2. China Shipbuilding Industry Corporation 1996-09-03 issued applicable media
High pressure air
1997-04-01 implementation
Structural scale
412305
3-2 Marking example
CB 593-96
1—wide body; 2—valve disc, 3—valve cover: 4—valve stem: 5—spring table 2
Threaded joint size
439 × 2 34
M45X237
102M6nX254
Flange connection size is
40145107:84
155117196
d, for impact hand wheel
Nominal pressure is 20.0MPa, nominal diameter is 15mm, lubricating material is nickel-copper with bottom flange, high-pressure air right-angle stop check valve:
Stop check valve 20015H
CB593-96
Nominal pressure is 25.0MPa, nominal diameter is 20mm, valve body material is stainless steel with bottom flange, high-pressure air right-angle stop check valve:
Stop check valve 25020N
CB 593-96
The valve body material with nominal pressure of 25.MPa and nominal diameter of 32mm is yellow steel with bottom flange. High-pressure air right-angle stop-check control valve:
Stop-check control valve 25032H
3.3 Materials
CB 593-96
3.3.1 The main parts materials of the stop-check control shelf are as shown in Table 3. 2
Inlaid with brass
Bronze wire
20.0MPu 23.0MPabZxz.net
HNi56-3
QAI10 3 1. 5
QSi3-1
CB 593—96
Standard No.
CB5232-85
GB4429-89
GB312382
Ultra-low carbon stainless steel
Stainless steel
Sound copper
The mechanical properties and chemical composition of ultra-low carbon stainless steel materials shall meet the following requirements: a. Mechanical properties 10o.= 400MPa: 0,3650MPa,= 25% b. Chemical composition: according to Table 4
Chemical elements
3.4 ​​Properties
2. 4 ~ 26
4. 5 ~~ 7. 5
2. 5 ~ 3. t
3. 4. 1 Technical requirements for stop check valves shall be according to GB 600. Chemical elements
The connection size of the stop-check valve threaded joint shall be in accordance with CB 316. 3.4.2
3.4.3 The main parts of the stop-check valve must be forged or made of profiles 25.0MPa
1Cr17Ni2
Q/110-3-1. 5
Standard No.
GR1220-84
GB4129-89
GH3123-82
3.4.4After the stop check valve body and valve cover are assembled, a hydraulic strength test shall be carried out. The test pressure P=1.5PN shall be maintained for 10 minutes without leakage.
3.4.5After the stop check valve is assembled, a hydraulic sealing test shall be carried out. When the stop check valve is closed, pressurize from the bottom of the valve disc with a hydraulic test pressure of P=1.25PN and maintain the pressure for 1 minute. There shall be no leakage. When the stop check valve is opened, seal the outlet end and pressurize from the bottom of the valve disc with a test pressure of Pm=1.25P and maintain the pressure for 10 minutes. There shall be no leakage at the valve cover and valve stem seal.3.4. 6 After the hydraulic test, the stop check valve should be subjected to an air pressure sealing test with a test pressure of P = P. When the stop check valve is closed, pressurize from below the valve disc and maintain the pressure for 101min. There should be no leakage. When the stop check valve is opened, seal the outlet, pressurize from below the valve disc and maintain the pressure for 10min. There should be no leakage at the valve cover and the wide stem seal. 3.4.7 Check valve air pressure sealing test Lift the valve stem, pressurize from above the valve disc with a test force of P = 5.0MPa and maintain the pressure for 10min. There should be no slippage under the valve disc.
3.5 Appearance: The surface of the stop check valve should be smooth and flat, and no defects such as burrs, slag inclusions, pits, etc. are allowed. 4 Quality Assurance Provisions
4.1 Inspection Responsibility
The stop check valve should be inspected by the technical inspection department of the manufacturer. The stop check valve submitted for acceptance must comply with Chapter 3 and Section 5 of this specification. 4.2 Inspection methods CB 593-96 4.2.1 Stop and check valves shall be subjected to hydraulic strength tests in accordance with GB 600, and the results shall comply with the provisions of 3.4.4. 4.2.2 Stop and check valves shall be subjected to hydraulic and pneumatic sealing tests in accordance with GB 600, and the results shall comply with the provisions of 3.4.5 and 3.4.6. 4.2.3 Check valves shall be subjected to pneumatic sealing tests in accordance with GB 600, and the results shall comply with the provisions of 3, 4.7. 5 Delivery preparation
5.1 Packaging
Before packaging, the flange sealing surface of the stop-check valve should be covered with a cover plate, and the threaded part should be covered with a sheath. 5.2 Packing
The stop-check valve should be packed in boxes before leaving the factory. There should be a packing list in the box, and the packing list should indicate the following: b. Product name, label number;
b. Nominal pressure, nominal diameter;
c. Quantity per box:
d. Product certificate number.
5.3 Storage
The product should be placed in a dry room and is not allowed to be stored in the open air. 5.4 Marking
The marking of stop check valves shall be in accordance with the requirements of (GB 3032, and shall have the standard number, inspection stamp and manufacturer's mark. Additional remarks
This specification is proposed by the Comprehensive Technical and Flow 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 Seventh () Fourth Research Institute of China State Shipbuilding Corporation, and the Sixth () Third Research Institute participated in the drafting. The main drafter of this specification
Project code: 942803
Wang Zhenmin.
This specification is provided with unified construction drawings.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.