This standard specifies the classification, requirements, test methods, inspection rules, marking, packaging and transportation of fast opening and closing watertight hatch covers. This standard is applicable to hatch covers used for watertight entrances and exits on various types of ships with fast and high closing requirements. CB/T 3842-2000 Fast opening and closing watertight hatch covers CB/T3842-2000 Standard download decompression password: www.bzxz.net

ECS 47. 020. 50
Reserve No.:7721—2000
Ship Industry Standard of the People's Republic of China
CB/T 3842--2000
Quick acting watertight hatch cover
Qulck acting watertight hatch cover2000-09-20 Issued
National Defense Science, Technology and Industry Commission
200101—01 Implementation
CB/T3842—20G0
The hatch cover of this standard adopts spring balance device and center clip device, with quick opening and closing characteristics, easy opening, light and watertight, divided into eight specifications of round (A type) and square (B type). It can be used for watertight exits and hatches with quick opening and closing requirements on various types of ships.
This standard is selected and coordinated by Jiangnan Shipbuilding (Group) Co., Ltd. The drafting units of this standard are Jiangnan Shipbuilding (Group) Co., Ltd. and Jiangyihuang Shipbuilding Co., Ltd. The main drafters of this standard are Lin Yu, Yang Anli, Yao Jun, Huang Jixi, and Gui Feng. 1 Scope
CE/T 38422000
Quick opening and closing watertight hatch covers
This standard specifies the classification, requirements, test methods, inspection rules, marking, packaging and transportation of quick opening and closing watertight hatch covers (hereinafter referred to as hatch covers).
This standard is applicable to hatch covers used for watertight exits and hatches with quick closing requirements on various types of ships. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest version of the following standards. Boiler material decay surface corrosion and rust removal before painting
GB/T 8923-1998
3 Classification
3.1 Type and specification series of hatch salt
With-shaped quick-glass opening and closing watertight age
Square quick-trace watertightness test hatch
Specification series
5500, @650, 8700, 750, 800
600X×600.700×700.800X800
Permissible force
CB/T3842-2000
3.2 The structure and main dimensions of the A-type hatch salt are as shown in Figure 1 Table 2.P37
1--Center clamping device; 2--board: 3--closed filler 14--spring balance; 5-1A type plastic expansion joint structure
2A plastic expansion joint required dimensions
Avoidance size
Opening size
Inner diameter of board
Outer diameter of board
Thickness of board
Note: The height H of the board can be determined according to the requirements, H is the minimum size, 2
Center size
CB/T 3842--2000
3.3 Structure and main dimensions of type B hatches are as per 2 and table 3.AXebzxz.net
1-Centre buckle plate 12-Benefit plate: 3-Sealing filler 14-Ballistic balance device: 5 Reading plate Figure 2B type hatch cover structure
Epidemic type 3 hatch plate seat dimensions
Socket dimensions
600X600
700X700
800800
Opening dimensions
80X640|| tt||40×743
840x843
Inside the enclosure
77X770
870X875
Outside the enclosure
720×720
820X820
920×930
Thickness of the combustion plate
Note: The height H of the combustion plate can be determined according to the needs. H in the table is the minimum size.
Center purchase
Marking example
CB/T 3842-2000
The national-shaped quick-opening watertight hatch with a through hole size of 4800 mm and a plate-to-plate distance of 200 mm is marked as: Watertight hatch blue AB00-200 CB/T 3842--2000 The square quick-opening and closing watertight hatch with a through hole size of 800mm×80mm and a plate-to-plate distance of 200mm is marked as Watertight hatch blue B800X800-200CB/1 3842-20004 Requirements
4.1 The materials of the main baby bag are as follows: 4,
Table 4 Materials of main components
Part name
Center clip quantity
Spring annual weight
Steel structure pin
Acid structure data
Quick manufacturing information
Haosuo structural steel
Q235-A
ZCuSn10Zn2
Q235--A
60SizMm
Standard
GB T12-2000
GB/T 700--1988
GB/T 1176-1987
GB/T 700--1988
GB/T 1222-3984
4.2 The filler material is made of butyl, and the tensile strength should be not less than 14.2MPa, and the hardness should be HA35~4. 4. The welded surface of the tank plate should be smooth, free of cracks, burn-through, and other defects. 4.4 The flatness of the plate surface should not exceed 0.5 mm. 4. The balance of the elastic charge and the center batch size should be observed and the neutral lubricating oil should be used. 4.6 The maximum initial pressure should not exceed 150N, the maximum opening angle is 100°, and the tire can be inserted with sugar. 4.7 The surface of the cover should be treated with glandular induced bacteria. After treatment, it should meet the requirements of Se2 and St2 in GB/Tang 8923, and the pressure should be 200°.
4. The hatch has good watertightness. After the watertightness test with force, there should be no deformation and water-tightness. 5.1 Appearance quality
Use the measuring method to measure the appearance of the hatch, and the result should meet the requirements of 4.3. 5.2 Flatness
Use the measuring tool to check the surface of the sealing surface of the coaming. The surface should meet the requirements of 4.4. 5.3 Test of force and opening uniformity
Use the tension to test the opening force and the measuring tool to check the opening angle. The result should meet the requirements of 4.6. 4 Watertightness test
The hatch is installed on a special sealing test grid. After the hatch is closed, water is pumped into the box. The pressure is 0.3.MP2 and the pressure is 15mia. The results shall meet the requirements of 4.8. 6 Inspection schedule
6. Classification of quality inspection
The quality inspection is divided into type inspection and final inspection. 6.2 Type inspection
CB/T 3842—2000
6.2.1 Type inspection shall be carried out in any of the following cases: a) First batch of product production;
b) Major changes in structure, structure and process; c) Non-continuous batch production;
d) Product transfer to another factory;
e) When the ship inspection department deems it necessary.
6.2.2 Type inspection items are arranged according to Table 5. Table 5 Inspection items
Inspection items
Appearance quality
Flatness
Opening force and opening degree test
Watertightness test
6.2.3 Number of inspection samples
Required number
Test method article number
Each specification of hatch plate, when the first batch is produced, takes a wind hatch cover for type inspection. 6.2.4 Judgment rules
Type inspection
Factory inspection
If the type inspection of the hatch plate meets the requirements of Table 5, it can be considered that the type inspection is qualified. If it is found to be unqualified, it is allowed to be re-inspected after adjustment. If the re-inspection is qualified, it is considered that the type inspection is qualified. 6.3 Factory inspection
6.3.1 The items for hatch cover factory inspection shall be in accordance with Table 5.6.3.2 Batch and sampling
Each hatch cover shall be subject to factory inspection.
6.3.3 Determination rules
If the hatch cover factory inspection meets the requirements of Table 5, it can be considered that the factory inspection is qualified. If it is found that it is unqualified, it is allowed to be re-inspected after adjustment. If the re-inspection is qualified, it is considered that the factory inspection is qualified. 6.3.4 After the inspection is qualified, the inspection department shall issue a certificate of conformity and a shipping extension. 7 Marking, packaging and transportation
7.1 Marking
7.1.1 The following product marks should be marked on the obvious parts of the product: a) Manufacturer name or label; b) Product name; e) Product mark: manufacturing date or production batch number; inspection pass stamp. 7.2 Packaging and transportation 7.2.1 The product can be packed in bundles or frame wooden boxes. 7.2.2 The product packaging box should contain the product inspection certificate. 7.2.3 The necessary rain protection measures should be taken during transportation to avoid impact. 5
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