CB 203-2002 Specification for high pressure threaded joints and through-tank pipe fittings CB203-2002 Standard download decompression password: www.bzxz.net

Shipbuilding industry standard of the People's Republic of China
FL4730
CB 203—2002
Diesa E 203-1966
Specification of high pressure thread joint penetration picccs2002—11-20 issued
National Defense Science, Technology and Industry Commission issued
2003—02—01 implemented
This plan is a revision of CR203-1966 in terms of pressure loss level technical specifications compared with B2031566. The main technical changes are as follows: CB 2092002
! For pipe fittings, the maximum diameter of the male diameter is changed from D38 to 96, which not only reduces the pressure requirement, but also adds the following materials:
2 increases the hydraulic strength test requirement:
3 adds the low-carbon duplex stainless steel "TR". The standard will replace CR3-1966. The standard is proposed by the Central Shipyard Industry Group, and the non-standard company is the Xi'an Shipbuilding Industry Research Institute. This standard is from the Hong Kong Chaozhou Group Co., Ltd., and the bone environment is the same. The main authors of this standard are: Chen Xinhua, Sui Youzhen, and Wang Jinhong. This specification was issued in June 2002.
This specification has unified technical drawings and references
1 Scope
Specification for high-pressure threaded joints and through-pipe fittings
CB203-2002
This specification specifies the requirements, quality assurance and delivery preparation for pressurized threaded joints and through-pipe fittings (hereinafter referred to as through-pipe fittings). This specification is for the design, manufacture and acceptance of refrigeration fittings for medium gas nominal pressure not exceeding 2500MW.
2 Normative references
The provisions in the following regulatory documents are applicable through inclusion in the specification and are therefore the provisions of this specification. The referenced documents marked with a seal or edition number are not applicable to any subsequent amendments or revisions of this specification, but the parties using this specification are advised to discuss the possibility of using their new versions. The following documents shall be marked with the date or edition number, and the latest version shall apply to the current standard. R 3197 Flame retardant, shoulder, delay, angle GB/7197-1981 General frequency tolerance and fit (diameter 1~355mm) B/-1 High-quality carbon case structural hook
Pairing and standard size
3.1. [Basic connection table of cabin pipe fittings:. Table 1
Basic reference for ship pipe fittings
Prepared parts
Maintenance
312A type general pipe fittings connection and safety. F.
Figure 1 Type general cabin fittings
Nominal diameter
Main surface
CB 203—2002
Nominal diameter
Structural length
KJ9×2
Table 2 Dimensions of type through-tank pipe fittings
3.1.3 The structural types and dimensions of type 6 through-tank fittings shall be in accordance with Figure 2 and Table 315
Figure 2 R type through-tank pipe fittings
Table 3 Dimensions of type B through-tank pipe fittings
Control length
H5±X2
Number of joints
Tolerances and tolerances of thread of through-tank pipe fittings: 3.1.4
The thread tolerance shall be in accordance with 6R:a specified in G/T1971R1
The thread efficiency shall be in accordance with GH/T315? Regulations
3.1.5 Marking example;
The ball stop force is used as the proof, and the nominal diameter is 10 blood! For example, the through-tank pipe fittings are marked as through-tank pipe fittings: 4250010CB203-2002
The nominal pressure is 25.0P, and the nominal diameter is 15mm. The R-type pipe fittings are marked as: H250015-120CB203-2002
The nominal pressure is 25.0MPu, and the nominal diameter is 15mm. For example, the B-type long-tank pipe fittings are marked as: 32503-5-170CB203-20C23.2 Materials
The materials of navigation fittings are as follows: Table 4
Table 4 Materials of through-tank arm fittings
+Parts color
4, Type 3 complete pipe fittings
Excellent navigation compensation fee sweeping pliers
Low-profile stainless steel hooks
3.2.2R stainless steel shall meet the following requirements for academic performance and chemical composition: Material name
School performance: 40
-650MIa.$27%
Chemical composition Table 5.
Table 5 Chemical composition of HDR steel
1. 5--7. 5
24--26
Note: The elements with dead numbers are not tested.
Appearance quality
2. 0--3. 0
0. .0 --0, 20
The inner and outer surfaces of the through-tank pipe fittings shall be smooth and clean, without cracks, burrs, etc. 3.4 Marking
The through-tank pipe fittings shall be marked with the model, standard number and manufacturing rules: 3.5 Compressive strength
Suitable for tank fittings with a liquid of 17.MPa and a small reverse flow quality assurance
Inspection classification
CB203-2002
Standard number
GR/T 699:1899
B 203—2002
The inspection of through-tank pipe fittings is divided into first-piece inspection and first-piece inspection: 4.2 First-piece inspection
4.2.1 Inspection items
The items of first-piece inspection of through-tank pipe fittings are increasingly increasing
4.2.2 Number of inspected samples
Three samples of through-tank pipe fittings are accepted for trial production: 4.2.3 Qualification criteria
All inspection items of the three samples are inspected and combined and judged as qualified for the first inspection. 4.3 Quality consistency inspection
4.3.1 Inspection items
The items of quality consistency inspection are shown in Table 5.
Quick inspection items
Inspection itemswwW.bzxz.Net
Appearance quality and mark
Strength resistance
Sample plan
The through-tank pipe fittings should be inspected
4.3.3 Qualification criteria
Testing
The test results
After the inspection of the through-tank pipe fittings, if the three inspection items do not meet the requirements, they are judged to be qualified. 4.4 Inspection method
4. 4. 4. 1 Size
The test results should meet the requirements of 3.1. 4.4.2 Material
The brand, mark and quality documents of the finished product should be verified before production. 4.4.3 Connection screw
Connection damage sensitivity and retention gauge inspection, the result should meet the requirements of 1.4. 4.4.4 Appearance quality mark
Requirements for dyeing number
3.1. 3.4
Long test force method single kill number
Monthly test of appearance quality: the result should meet the requirements of 3,3, and at the same time check the mark on the energy pipe, which should meet the requirements of 3.1:
4.4.5 Compressive strength
The pressure resistance should be adjusted to the required level, and the system should be 3? .5M, length 53it: The product should meet 3.5 material requirements, 5 delivery preparation
5.1 Packing
For industrial pipe fittings, the joints at both ends should be protected by plastic, and then sealed with plastic bags.
5.2 Packing
Through-cabin pipe fittings should be packed in boxes before leaving the factory. There should be a packing list in the box. The following contents should be stated on the packing list: a. Product name, standard number
) Nominal pressure, nominal diameter:
) Number of pieces per box:
) Product certification.
Through-cabin general parts should be stored in a dry, ventilated and non-corrosive room. CB 203--2002
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