CB 591-1996 Specification for high pressure air right angle check valves

CB 591-1996 High-pressure air right-angle check valve specification CB591-1996 standard download decompression password: www.bzxz.net

China State Shipbuilding Corporation Department Standard
CB 591—96
High-pressure air right-angle check valve specification
1996-09-03 Issued
China State Shipbuilding Corporation
1997-04-01 Implementation
1 Scope
China State Shipbuilding Corporation Department Standard
High-pressure air right-angle check valve specification
CB591-- 96
Classification number tU52
Replace CB 591—67
1.1 Subject content
This specification specifies the requirements, quality assurance provisions and delivery preparations for high-pressure air right-angle check valves (hereinafter referred to as check valves) with a nominal pressure of PN20.0MPa and PN25.0MPa. 1.2 Scope of application
This specification applies to the high-pressure air system of submarines. 2
Referenced documents
GR 600—91
GB303289
GB31664
3Requirements
Structure and specifications
General technical conditions for ship pipeline valves
Marking of ship pipeline accessories
High-pressure air pipe threaded joints
The basic parameters of the check valve are as shown in Table 1.
Nominal pressure
20. 025. 0
China State Shipbuilding Corporation 199609 03 Issued Nominal diameter DN
Applicable medium
High pressure air
1997-04-01 Implementation
3.1.2 Check valve structure According to the figure and table 2CB 591-96
1-valve body 2-screw plug +3-spring reputation: 4-check piece; 5--sealing ring Table 2
Nominal diameter
3.2 Marking example
M45×2
Nickel brass high-pressure air right-angle check valve with a nominal pressure of 20.0MPa and a nominal diameter of 20mm: check valve
20020H CB59196
Stainless steel high-pressure air right-angle check valve with a nominal pressure of 25.0MPa and a nominal diameter of 321urm1; Positive return valve
25032VCB591-96
Nickel brass high-pressure air right-angle check valve with a nominal pressure of 25.0MPa and a nominal diameter of 32mm: Check valve
3.3 MaterialsbZxz.net
25032HCB 591-96
3.3.1 The materials of the main parts are as shown in Table 3.
Parts name
Check piece
Sealing ring
Spicy brass
Aluminum bronze
Tin bronze
211.MPa.25oMPa
ENi56-3
QAL10-3.1.5
QSn4-3
CB 591 96
GB523285
GR5232-85
GB5574-85
Ultra-low carbon
Stainless steel
Alloy structural steel
The mechanical properties and chemical composition of ultra-low carbon stainless steel materials shall meet the following requirements: a. Mechanical properties: 52=400MPa+0.650MPa;8-25%: b. Chemical composition according to Table 4.
Chemical elements
24 ~ 2G
4.7 -- 7. 5
2.5 ~ 3. 0
The technical requirements of the check valve shall be in accordance with GB G00.
The main parts of the check valve must be molded or made of profiles, and the size of the check joint shall be in accordance with GB316.
Chemical elements
JCr17Ni2
Z0CTNi3A
GE1220-84
GB3079-82
GB 5574-85
The check valve should be subjected to a strength hydraulic test together with the screw plug. The test pressure is P, = 1.5PN, and there should be no leakage when the pressure is maintained for 10anin. 3.4.5 After the check valve is assembled, a hydraulic sealing test shall be carried out, and the test pressure is P. =1.25PN. Pressurize from the outlet and maintain the pressure for 10 minutes. Repeat the test twice. There should be no leakage.
3.4.6 After the hydraulic test, the positive air tightness test should be carried out with two test pressures of 5.0MPa and P. Pressurize from the outlet and maintain the pressure for 10 minutes. There should be no leakage.
3.5 Appearance
The appearance of the check valve should be smooth and flat, and no defects such as dents and burrs are allowed. 4 Quality Assurance Provisions
4.1 Inspection Responsibility
The factory inspection of the check valve shall be the responsibility of the technical inspection department of the manufacturer. The check valve submitted for acceptance shall meet the requirements of Chapter 3 and Chapter 5 of this standard.
4.2 Inspection Method
The check valve shall be subjected to hydraulic strength test according to the requirements of GB600, and the result shall meet the requirements of Article 3.4.4. 4.2.2
The check screw should be tested for pressure and air tightness according to the requirements of GB600, and the results should comply with the provisions of Articles 3.4.5 and 3.4.6. 3
Delivery preparation
Before packing, the check screw thread should be sheathed. Packing
Beitong should be packed in boxes when leaving the factory. There should be a packing list in the box. The following contents should be indicated on the packing list
8. Product name, standard number;
b. Nominal pressure, nominal diameter;
t. Quantity per piece:
d. Product certificate number
5.3 The stored
product should be placed in a dry room, and open-air storage is not allowed. 5.4 Marking
CB 59196
The marking of the check chamber shall comply with the requirements of GT 3G32 and shall have the standard number, inspection stamp and manufacturer's mark. Additional remarks:
This specification is proposed by the Comprehensive Technical and Economic Research Institute of China State Shipbuilding Corporation. This specification is under the jurisdiction of the Wuchang Shipyard of China State Shipbuilding Corporation. This specification is drafted by the Seventh () Fourth Research Institute of China State Shipbuilding Corporation and participated in by the Sixth () Third Research Institute. The main drafter of this specification: Zhang Xiaoou
Project code: 942801
This specification is provided with a unified screening drawing.
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