This standard specifies the product classification, technical requirements, inspection rules, marking and packaging of marine blind steel flanges with flange connection dimensions in accordance with GB 569 and GB 2501. This standard is applicable to marine piping systems with a nominal pressure not exceeding 1.6MPa and media such as air, seawater, fresh water, oil and steam with an operating temperature not exceeding 300℃. GB/T 4450-1995 Marine Blind Steel Flange GB/T4450-1995 Standard download decompression password: www.bzxz.net

JC% 47. L20. 30
National Standard of the People's Republic of China
GB/T 4450--1995
Marine Blind Steel Flanges
Marineblanksteeiflages
1995- 11- 20 Issued
1996-0B-01 Implementation
State Administration of Technical Supervision
Reissued
National Standard of the People's Republic of China
Marine Blind Steel Flanges
Marineblanksteeiflages
1 Content and Applicable Scope
GA/T 450-1995
Generation ( 66:0--84
This standard specifies the product type, technical requirements, inspection specifications, and packaging of flange connection size B553G82507 (F for short commercial flange). This standard applies to the nominal pressure not more than 1.MPa, including air, seawater, fresh water, oil and steam, and the working width is not more than 39 years.
2 Reference standards
G539-65 Marine flange connection and sealing surface GB58365 flange gasket
B2501-5 potential use related connection Dimensions and seals (four-position) GB2502-B9 flange soft-wall drawing (Chuanjin position) CB*/2343-84 hot-dip brocade general process
3 Product classification
3.1 The type specifications of the plate flange are as follows:
Flange connection dimensions are in accordance with GR69 marine blind plate dance flange AS type
The flange connection size is in accordance with GB2502 marine plate drill flange flange quick connection size is in accordance with GB569 double marine and steel method benefits. Flange standard size is extracted from GB2501 effective marine Henry plate toughness flange. 32 Blind plate method and basis: This season number is in accordance with Table 1, 1
Working version health, drink
Public ring pressure PN
G.6.i..lc
National Technical Supervision 1995-11-20 approved
Nominal reserve
20~·505
20--500
2u-~c0
Large working volume MPa
1996-08-01 implementation
GB/T4451-1955
3.3Structure and certain dimensions of type A flange Figure 1 Table 2. Figure 1A type A S type
Public specification
Bolt title and through hole
Nominal diameter
Note, the center may be used for the public flange. GR/T4453-1S95
Continued Table 2
3.4 ​​The structure and basic dimensions of A5 type flange are obtained from Figure 1 and Table 3. Flange
Drive the smoke cavity island
Nominal positive force PV
Public diameter [
GR/T4450-1995
Australia Inspection pattern and required exchange
10, 3?
Public force PN
Public communication EN
GR/T4450—1935
3. 5 The connection control and basic 4 dimensions of the shaped flange; Figure 2 and Table 4.268
Figure 2B type S type
Course full effect and through hole
26, 82
Public building five major FN
Nominal avoidance diameter N
Note: The nominal diameter within the scope of the world can be excluded as much as possible, 6
GB/T44501995
Smoke whole mosquito modified Tongzhou
G8[4450—1995
3.6 Is the connection and basic size of the S type blind method? And table, Mai 5
D>N
screw thread and through hole
44-1=
.ti.69
K force PN
3. The nuclear instructions
nominal suitable
GB/T4450—1995
standard table 5
head life eye standard through hole
27, E3
The nominal pressure is 1.MPu, the nominal diameter is 5011m, the technical GB flange manufacturing size and customer cover of the marine official reverse hook flange: Bai plate flange 41605CGB/+501995
The public dynamic pressure is .MPu, the nominal diameter is 80a, and the connection size and tightness of 2501 flange (four-way> double-use steel plate flange:
plate flange R510080GB-T445)—1995
Find technical requirements
4. What is the maximum value? The inspection rate can be based on Table 6. Table 6
Actual parts
Plate flange
Qualcomm Corporation
No. or energy-saving special bzxz.net
Q33F-A
1 general or 5th edition
4.2 The surface of the plate flange should be smooth, without grooves and obvious defects. 4.3 The use of gaskets for flanges shall comply with the provisions of GB685.CB2302. 4.4 The flange dimensions and sealing surface shall comply with the provisions of GB569, (B25G1). 1.5 When flanges are used in medium systems of European type, they shall not be used in other medium systems. The minimum total weight of the flange shall be 510g/m2. 5 Inspection rules 5.1 The flanges shall be inspected and accepted by the inspection department of the manufacturer and a certificate of conformity shall be issued. 5.2 Inspection contents during acceptance shall include material, dimensions and appearance. 8 CB/T 44501995 5.3 Thermal quality inspection shall comply with the provisions of CB/Z343. Marking and packaging
6.1 Blind flanges should be marked with:
Product name,
Product specification and standard number:
Manufacturer name;
Manufacture date:
Inspection stamp.
6.? The surface of the flange without chain shovel should be marked before packaging, with additional instructions,
This standard is proposed by China Shipbuilding Industry Corporation. This standard is produced by the Sixth Institute of China Giant Shipbuilding Industry Corporation, and this standard is drafted by China Shipbuilding Industry Corporation. This standard is recommended by the drafter,
This standard has a unified construction sample,
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