Some standard content:
ICS 47.020.30
Registration No.: 11140-2003
Ship Industry Standard of the People's Republic of China
CB/T 3942-2002
Flanged stainless steel stop valves
Stainless steel flanged stop valves2002—11—20 Issued by
National Defense Science, Technology and Industry Commission Issued by
2002-0201 Implementation by
CB/T3942-2002
This standard defines type A, type S stainless steel mechanical width, left method "connection size and sealing" consistent with the provisions of GB/T69-13E5 & Ship flange delivery dimensions and sealing straight, square structure length and B/84-1939 usage "steel end of week A type, that is, type number end of reading:
This standard defines type A5, type 3 stainless steel valves, its flange connection size and sealing surface 6B/T2601-189 The ship pressure flange size and cover (four-digit 3) are specified in accordance with the "structural length of the flanged valve" in 3/1198-1989. This standard is proposed by China Shipbuilding Industry Corporation and is issued by China Shipbuilding Industry Corporation. The originators of this standard are: China Shipbuilding Industry Corporation, Hongying Shipbuilding Industry Corporation, Dalian New Ship Heavy Industry Corporation. Www.bzxZ.net
Drafters of this standard: Duo Fayuan, Cai Yu, Gu Jinping, Liu Yunnong, Qiong Quanquan. 1 Fan Guo
Flange stainless steel stop valve
CB/T 3942—2002
This standard specifies the classification, requirements, test methods, inspection rules, marking and packaging of flanges made of stainless steel with small size and tight connection GB/569, G7/T251: The standard applies to the design, manufacture and acceptance of pipelines for ships with nominal stop not higher than 6.4VFu and design temperature not lower than T-155m, chemical tankers and distribution parts of ships with concentrated gas, chemical tankers and distribution parts. Other ships with corrosive media as pipeline systems can refer to the following
2 Normative reference documents
The clauses in the following documents are used for the reference of this standard. All the amendments (excluding those of the design) or revisions of the referenced versions of the standard shall not be included in this standard. However, the latest versions of these documents shall apply to all parties that have reached an agreement based on the technical standards: For referenced documents without a date, the latest version shall apply. G/T5691965 Flange connection size GB/600--1991 Technical conditions for pipeline valves G/T2201992 Stainless steel GB/2100-1980 Technical conditions for stainless acid-resistant steel parts GB/T2501-1980 $(52
肝Usage: Connection size and seal (four-digit 1989
薪some road parts signs
Guangdong National Column
18 Edition "Text and Welding Code
3 Classification
9. 1 Type
The types of stop valves are as follows:
Flange connection size and seal are still with the number of straight-through type stop valves: B type----flange connection size and seal according to B/59-1E5 right angle stop valve: S type-flange made into inch and diameter seal according to CL/2601-139 back-in type stop valve: BS type----reverse connection size + and less damage and connected to GB/T250_--3 angle type stop valve adjustment. 3. 2 Basic numbers
The basic technical parameters of the check valve are not shown in Table 1
C/T3942-2002
A. Japanese
Nominal ring force!
3. 3 Structure and basic dimensions
Table 1 Basic static data of cutting width
Working depth
Maximum allowable working pressure
center, 42
Normal standard
E5~-360
200 -.305
100~-363
15-500
65-1D0
20--50
3.3.1 The structural narrow benzene of type 4 and type 3 with PWV of 1.0, 1.6 and 2.5Mz is as shown in Figure 1, Figure 2 and Table 2. The unit is meter
Figure 1A type, AS type (PWs: 2. 5MPa)
Allowed to use flat handwheel
Figure 2 Type, BS type (2.5 MPa)
Nominal pressure
Table 2Basic dimensions of type A and type B stop valves with PV of 1.0, 1.6 and 2.5MPs
150,37
1 piece-1
CB/T3942—2002
The unit is meter
Please refer to kg
For type A and type B stop valves with PV of 4.0 and 6.4MPa, please refer to Figure 3, Figure 3:9.3.2
High meter
Allowed to use flat handwheel
Figure 3 Type A, AS (AW>4.0 MPa)
Figure 4 Type B, BS (PW.24.0MPa)
CB/T3942—2002
Table 3 shows the basic dimensions and structural dimensions of Type A and Type BS with PV of 4.0 and 6.4 MPa. The unit is set. The basic dimensions and structural dimensions of Type AS and Type BS with PV of 0.6, 1.0, 1.6 and 2.5 MPa are as shown in Figure 1, Figure 2 and Figure 4.
Basic dimensions of type stop valves
Table 4 Type AS and Type BS with PW of 0.6, 1.0, 1.6 and 2.5 MPa are as shown in Figure 4.
Nominal pressure
Conclusion dimensions
ES Type
AS Type S Type
To see ke
16. 7 1 1.1. 1
223.011.0
JC7.01c2.
221.0214.0
12.1.0116. 0
215.0|205.D
Nominal limit force
AS Type
Given the period scale
Table 4 (continued)
140100
185145
10:360
CB/T3942-2002
Unit is square meter
S type, S type cross section width and benzene size according to Figure 3, Figure 4 and Table 5 PW is 4. D and 6. 4 MP = AS type, BS The basic size of the cut-off adjustment type is ks
.c124.0
167.2160.2
The middle position is high light
3.4 Marking example
RS type
2e1243
18614512
20016n
180135102
15012H
Registered kg
The displacement pressure is 2.5VPa, the nominal diameter is 65mm, the standard connection size and sealing surface are in accordance with B/T569 (the standard type of stainless steel is marked as:
Size A25065
CB/T 3942-2002
Transfer pressure is 2.5MP: nominal diameter is 200 mm, small and tight when the surface conforms to GB/3501 right angle flange stainless steel cut into a mark
end 8525200
C153942-2002
B/T3942-2002
4 Requirements
4.1 Materials
Main materials for testing are shown in Table 6
Two-piece, plate
Moving rod, fastener
Material, sheet
FV4.0MP standard cover
Position: ceramic plate is allowed, cutter according to parts processing..
4.2 Castings
Table 6 Materials for main parts of stop valves
Non-drying
Chuchuan ethylene oxide
Structure, wall, hard alloy
2G0C15N19
ZG00Cr-17Ni1o3
TE/T2100-960
G-T1220 1992
The chemical composition, scientific and mechanical properties of stainless steel stop valves shall comply with G3T2-1- or material and connection specifications. The stop valve castings shall be subjected to drop folding at a temperature not lower than 1°C, and shall be rapidly cooled in a gas atmosphere with a temperature below -55°C. The other special parts shall be welded according to the material specifications. 4.2.3
furnace 1 group to be selected by the type of notch impact test. 4.2.4 m 2CK-18i9 material of the stop foot castings should be tested for corrosion, 4.2.5 the sealing surface needs to be surfacing diamond, chrome, pigeon carbide stop valve stainless steel castings, the circumference of the treatment should be carried out on the surfacing piece, 4.2.B each furnace casting at least three with the number of the test connection. 1 storage period should not be less than three years. 4.2. For the use temperature below -100 inches, the body, valve, valve, and valve should be cryogenically treated. 4.3 machining
the stainless steel sealing surface of the end period should be processed by pressing sugar correction or grinding, 4.4 strength
the strength of the end body should be light under the hydraulic pressure of 1.5 times the nominal pressure. 4.5 Sealing || tt || 4.5.1 Test the sealing between the valve plate and the valve stem when the valve is fully closed. 4.5.2 Test the sealing between the valve plate and the valve stem when the nominal pressure is smaller than 1.1 and the valve is fully open. The tightness of the wide-rod cover shall not exceed 10mm/mir at the port level of 1.0 nominal pressure. 4.6 Dimensional tolerance The dimensional tolerance of the cut-off valve shall comply with the requirements of 0600-1991~3.2, 3.3, 3.10. 4. Form tolerance The form and position tolerance of the cut-off valve shall comply with the requirements of CB/T60-1991-13.1. 4.8 Appearance The appearance of the stop valve shall comply with the requirements of 3.4-3.9 in GB/T600-1991. 6.5 Test method 5.1 Casting test CB/T 3942 --2002
5.1.1 The test method for chemical composition and mechanical properties of stainless steel castings shall be carried out in accordance with the provisions of CB/T2100-1980. The results shall meet the requirements of 2.2.1.
5.1.2 The corrosion test of stainless steel castings shall be carried out in accordance with the provisions of 3.5 of 6 Material Welding Specification (1998). The results shall meet the requirements of 4.2.4.
5.2 Cryogenic treatment
The cryogenic treatment method of the castings is: immerse the castings in a hydrogen chamber, and keep them warm for 2 hours when the temperature of the castings reaches -196°C, then take them out of the chamber and treat them to room temperature, and then heat them up again. 5.3 Processing
The test results shall meet the requirements of 4.3. 5.4 Strength
The test method for strength is in accordance with the provisions of 4.1.2, 4.1.3 and 4.3.1 of GB/T600-1991. The result should meet the requirements of 4.4.
5.5 Sealing
5.5.1 The test method for sealing between the smoke valve disc and the limit seat is in accordance with the provisions of 4.2.2 and 4.3.1 of GB/T600-1999. The result should meet the requirements of 4.6.1.
5.5.2 The test method for the balance of the valve between the load-bearing rod and the valve is as follows: Under the condition that the material is not in good condition, fully open the valve to make the surface of the valve between the foot rod and the valve close to each other, and then fill the valve with water. The machine pressure is increased to the nominal pressure and the pressure is maintained at 1m13. Water is collected from the slope material outlet. The result should meet the requirements of 4.5.2. 5.6 Dimensions and dimensional tolerances
For linear measurement, the corresponding level of dimensional tolerance is prohibited. 5.7 Form and position tolerances 1. The form and position tolerances of the tooling shall be guaranteed, and the result shall meet the requirements of 4.7. 5.8 Appearance The three-dimensional external test method shall be used for inspection: The product meets the requirements of 8: 6 Inspection specification B.1 Inspection classification Type inspection and output inspection. 6.2 Type inspection 6.2.1 Inspection time Type inspection shall be carried out when one of the following factors occurs: Product identification Product put into production or major changes occur Quality problems are found during mass production: ) The relevant quality inspection department shall conduct inspection. 6.2.2 Inspection items
Provisions for the selection table of type inspection results.
CB/T 3942--2002
Control item E
Parts chemical composition and mechanical properties
Product distance
Size and inch tolerance
Position tolerance
\" indicates the actual inspection item:
Number of inspection samples
Table 7 Inspection items
Location, case number
x. t, 1.4
" indicates the fixed inspection item
The number of samples for the entire valve type inspection does not need to be more than 3 6.2.4 Judgment rule
Identification point method. All samples will be inspected for all items and half of them will be qualified for type inspection: if there are items that do not meet the requirements, double sampling is allowed. If the re-inspection still does not meet the requirements, it will be considered as type inspection failure. 6.3 Type inspection
6.3.1 The inspection items of this product shall be in accordance with the provisions of 7. 6.3.2 The inspection shall be conducted on all products. 6.3.3 Judgment rules
6.3.3.1 All inspections must meet the requirements to be judged as qualified. 6.3.3.2
If the chemical analysis, mechanical properties and intergranular reading test of the test piece do not meet the requirements, it will be judged as a type inspection failure.
8.3.3.3 Other items of inspection, if there is a stop valve that does not meet the requirements, it is allowed to be repaired and re-inspected. If the re-inspection does not meet the requirements, the stop valve is judged to be unqualified.
Marking and packaging
71 The marking of the stop valve shall comply with the provisions of GB/T3082. 7.2 The packaging of the stop valve shall comply with the provisions of 6.2-6. in GB/T600-1991:2 Cryogenic treatment
The method of cryogenic treatment of the parts is: immerse the parts in a hydrogen chamber, keep the temperature for 2 hours when the temperature of the parts reaches -196°C, then take them out of the chamber and treat them to room temperature. 5.3 Processing
Testing method: 1. The result shall meet the requirements of 4.3. 5.4 Strength
The test method of strength shall be in accordance with the provisions of 4.1.2, 4.1.3 and 4.3.1 in GB/T600-1991. The result shall meet the requirements of 4.4.
5.5 Sealing
5.5.1 The test method of sealing between the smoke valve disc and the limit seat shall be in accordance with the provisions of 4.2.2 and 4.3.1 in GB/T600-1999. The result shall meet the requirements of 4.6.1.
5.5.2 The test method for the balance of the valve between the load-bearing rod and the valve is as follows: Under the condition that the material is not in good condition, fully open the valve to make the surface of the valve between the foot rod and the valve close to each other, and then fill the valve with water. The machine pressure is increased to the nominal pressure and the pressure is maintained at 1m13. Water is collected from the slope material outlet. The result should meet the requirements of 4.5.2. 5.6 Dimensions and dimensional tolerances
For linear measurement, the corresponding level of dimensional tolerance is prohibited. 5.7 Form and position tolerances 1. The form and position tolerances of the tooling are guaranteed to meet the requirements of 4.7. 5.8 Appearance The three-dimensional external test method is used for inspection: The product meets the requirements of 8: 6 Inspection specification B.1 Inspection classification Type inspection and output inspection. 6.2 Type inspection 6.2.1 Inspection time Type inspection shall be carried out when one of the following factors occurs: Product identification Product put into production or major changes occur Quality problems are found during mass production:) The relevant quality inspection department shall carry out inspection. 6.2.2 Inspection items
Provisions for the selection table of type inspection results.
CB/T 3942--2002
Control item E
Parts chemical composition and mechanical properties
Product distance
Size and inch tolerance
Position tolerance
\" indicates the actual inspection item:
Number of inspection samples
Table 7 Inspection items
Location, case number
x. t, 1.4
" indicates the fixed inspection item
The number of samples for the valve type inspection does not need to be more than 3 6.2.4 Judgment rule
Identification point method. All samples will be inspected for all items and half of them will be qualified for type inspection: if there are items that do not meet the requirements, double sampling is allowed. If the re-inspection still does not meet the requirements, it will be considered as type inspection failure. 6.3 Type inspection
6.3.1 The inspection items of this product shall be in accordance with the provisions of this specification. 6.3.2 The inspection shall be conducted on all products. 6.3.3 Judgment rules
6.3.3.1 All inspections must meet the requirements to be judged as qualified. 6.3.3.2
If the chemical analysis, mechanical properties and intergranular reading test of the test piece do not meet the requirements, it will be judged as a type inspection failure.
8.3.3.3 Other items of inspection, if there is a stop valve that does not meet the requirements, it is allowed to be repaired and re-inspected. If the re-inspection does not meet the requirements, the stop valve is judged to be unqualified.
Marking and packaging
71 The marking of the stop valve shall comply with the provisions of GB/T3082. 7.2 The packaging of the stop valve shall comply with the provisions of 6.2-6. in GB/T600-1991:2 Cryogenic treatment
The method of cryogenic treatment of the parts is: immerse the parts in a hydrogen chamber, keep the temperature for 2 hours when the temperature of the parts reaches -196°C, then take them out of the chamber and treat them to room temperature. 5.3 Processing
Testing method: 1. The result shall meet the requirements of 4.3. 5.4 Strength
The test method of strength shall be in accordance with the provisions of 4.1.2, 4.1.3 and 4.3.1 in GB/T600-1991. The result shall meet the requirements of 4.4.
5.5 Sealing
5.5.1 The test method of sealing between the smoke valve disc and the limit seat shall be in accordance with the provisions of 4.2.2 and 4.3.1 in GB/T600-1999. The result shall meet the requirements of 4.6.1.
5.5.2 The test method for the balance of the valve between the load-bearing rod and the valve is as follows: Under the condition that the material is not in good condition, fully open the valve to make the surface of the valve between the foot rod and the valve close to each other, and then fill the valve with water. The machine pressure is increased to the nominal pressure and the pressure is maintained at 1m13. Water is collected from the slope material outlet. The result should meet the requirements of 4.5.2. 5.6 Dimensions and dimensional tolerances
For linear measurement, the corresponding level of dimensional tolerance is prohibited. 5.7 Form and position tolerances 1. The form and position tolerances of the tooling are guaranteed to meet the requirements of 4.7. 5.8 Appearance The three-dimensional external test method is used for inspection: The product meets the requirements of 8: 6 Inspection specification B.1 Inspection classification Type inspection and output inspection. 6.2 Type inspection 6.2.1 Inspection time Type inspection shall be carried out when one of the following factors occurs: Product identification Product put into production or major changes occur Quality problems are found during mass production:) The relevant quality inspection department shall carry out inspection. 6.2.2 Inspection items
Provisions for the selection table of type inspection results.
CB/T 3942--2002
Control item E
Parts chemical composition and mechanical properties
Product distance
Size and inch tolerance
Position tolerance
\" indicates the actual inspection item:
Number of inspection samples
Table 7 Inspection items
Location, case number
x. t, 1.4
" indicates the fixed inspection item
The number of samples for the entire valve type inspection does not need to be more than 3 6.2.4 Judgment rule
Identification point method. All samples will be inspected for all items and half of them will be qualified for type inspection: if there are items that do not meet the requirements, double sampling is allowed. If the re-inspection still does not meet the requirements, it will be considered as type inspection failure. 6.3 Type inspection
6.3.1 The inspection items of this product shall be in accordance with the provisions of 7. 6.3.2 The inspection shall be conducted on all products. 6.3.3 Judgment rules
6.3.3.1 All inspections must meet the requirements to be judged as qualified. 6.3.3.2
If the chemical analysis, mechanical properties and intergranular reading test of the test piece do not meet the requirements, it will be judged as a type inspection failure.
8.3.3.3 Other items of inspection, if there is a stop valve that does not meet the requirements, it is allowed to be repaired and re-inspected. If the re-inspection does not meet the requirements, the stop valve is judged to be unqualified.
Marking and packaging
71 The marking of the stop valve shall comply with the provisions of GB/T3082. 7.2 The packaging of the stop valve shall comply with the provisions of 6.2-6. in GB/T600-1991:
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.