CB 590-1995 Specification for high pressure air right angle stop check valve with mounting plate CB590-1995 Standard download decompression password: www.bzxz.net

China State Shipbuilding Corporation Department Standard
CB 5901995
High-pressure air right-angle stop
Check valve specification
1995-12-19 Issued
China State Shipbuilding Corporation
1996--08-01 Implementation
1 Scope
China State Shipbuilding Corporation Department Standard
High-pressure air right-angle stop
Check valve specification
CB 590 1995
Classification number: U52
Replaces (: B590-67
1.1 Subject content
This specification specifies the requirements, quality assurance provisions and delivery equipment for micro-stop valves with installation warning air pressure indicator (hereinafter referred to as pressure indicator valves).
1.2 Scope
This specification is applicable to commercial air pipeline systems with nominal pressure of 20.0M1Pa and 25.GMPs. 2' Reference documents
GB 6300:
GB 3332-89
CB 31t—64
3 Requirements
Technical conditions for ship pipeline fittings
Specifications for ship pipeline accessories
Commercial air pipe threaded joints
3.1 Structure and specifications
3.1.1 Basic parameters of stop check valves according to Table 1. Table
Nominal diameter D
According to the material method
3.1.2 Structure and basic dimensions of stop check valves according to drawings and drawings? China State Shipbuilding Corporation 1995—12-19 approved stainless steel
Applicable media
1996—08-01 implementation
3.2 Marking examples
Meanwhile and size
n 116 8+
CB 5901995
Flow avoidance size
Nominal back force is 20.MPi: the nominal diameter is 15mm, the wide body material is steel and has an installation plate, high-pressure air occupies the micro-Ir.
Load check valve
C 5995
Nominal positive force is 25.0MPi, the nominal diameter is 20mm), the valve position material is stainless steel and has an installation right, high-pressure tight stop valve:
Stop check valve
25020N
CH 590.-05
Nominal pressure of 25.GMPa, nominal diameter of 15mm, high pressure air true angle load positive return valve with yellow body and mounting plate:
Stop check valve
3.3 Materials
250111
CB55095
3.3.1 The upper materials of the stop check valve are in accordance with Table 3. Part name
Salt copper
HN156-3
QA1.1(I-3
CB 590-1995
Array number
8523265Www.bzxZ.net
G-29-81
GB 3123-82
Stainless steel
Stainless copper
Taiwan alloy structure
IC:INi
QA1.10 3-1.5
2CCrNi3A
3.3.2 The mechanical properties and chemical composition of ultra-low carbon stainless steel materials shall meet the following requirements: a. Mechanical properties: :=4c0MPa650MPa, -25 element: h. Chemical composition; according to Table 4.
Chemical elements
3.4 ​​Properties
Content percentage meaning
3.4.1 The technical requirements for the end of lubrication shall be in accordance with 6C03.4.2, and the reverse connection size of the threaded joint shall be the same as B316. 3.4.3 The main parts of the three-dimensional stopper must be made of molded or coin-shaped materials. Content white content % New standard number GH122C-- 84 0B1429-65 GB S(0r9-2
3.4.4 After the valve cover is installed, a strength test is carried out with a filter pressure of Ps-1.3N. The body should not leak for 10 minutes. 3.4.5 The stop valve should be subjected to a wave test. When the valve cover is installed, a hydraulic pressure of P1-1.2P is applied from the bottom of the lubricating disc for 10 minutes. There should be no leakage. When the stop valve is opened, a wave pressure of Pm=1.2RV is applied from the bottom of the valve disc. The positive force is applied for 10 minutes. Then check whether there is leakage at the valve and the valve stem seal. 3.4.6 The stop valve should be tested with a pressure of 1m=PN. Pressure tightness and performance test, when the stop check valve is closed, add air pressure from the bottom of the valve disc, the pressure is 10mm, there should be no moisture leakage. When the stop check valve is opened, the air pressure is added from the bottom of the valve disc at the outlet, the positive pressure lasts for 10min, and then check that there is no leakage at the valve stem seal. 3.4.7 The stop check valve is tested for tightness by reverse air flow, and the pressure is applied from the top of the disc to maintain the pressure IGmin with a test pressure of 10MPa: there should be no leakage under the steel key, and the surface of the stop check valve should be smooth and smooth, and burrs, slag, pits and other defects are not allowed. 4 Quality Assurance Provisions 4.1 Inspection Quality The technical inspection department of the stop check valve manufacturer is responsible for the inspection. The stop check valves submitted for acceptance must meet the requirements of Chapter 3 and Section 5 of this Regulation. CB 590—1995
4.2 Test methods
4.2.1 The stop check valve shall be subjected to hydraulic strength test according to the requirements of GB 600 and shall comply with the provisions of Article 3.4.4. 4.2.2 The stop check valve shall be subjected to hydraulic and pneumatic sealing tests in stages according to the requirements of GB 600 and shall comply with the provisions of Articles 3.4.: and 3.4.6.
4.2.3 The check valve shall be subjected to pneumatic tightness test according to the requirements of GB 600 and shall comply with the provisions of Article 3.4.7. 5 Delivery preparation
5.1 Packaging
Before packaging, the stop check valve shall be protected. 5.2 Packaging
The stop check valve shall be packed in boxes before leaving the factory. There should be a packing list inside, and the packing list should indicate the following: a. Product name. Standard code; b. Nominal pressure, nominal diameter: g. Number of each box: d. Product certificate number. The product is not allowed to be stored in a flat container. 5.4 Marking The stop mark should be in accordance with the requirements and standards of GR3032. The drawing number, inspection stamp and manufacturer's information should be included. Additional notes: This specification was proposed by the Military Pipeline Accessories Group of China State Shipbuilding Corporation, and this specification is under the jurisdiction of the Wumazun Shipbuilding Corporation of China State Shipbuilding Corporation. This specification was initiated by the 74th Research Institute of the 7th Institute of China State Shipbuilding Corporation, and the 63rd Institute participated in the drafting. The main drafter of this specification is Gong Zhenmin. This specification is provided by the unified construction drawings. Project test: 932803:
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