This standard applies to the metal hull drawings of civil ships and military auxiliary ships. Other ship hull drawings, ship machinery and ship electrical drawings, in addition to their own characteristics, can be used as a reference. Parts not clearly specified in this standard should be drawn in accordance with the national standard "Mechanical Drawing". GB/T 4476.4-1984 Metal hull drawing dimension annotation method GB/T4476.4-1984 standard download decompression password: www.bzxz.net

UDC.629.12.011:744.4
National Standard of the People's Republic of China
GB 4476.1～447B4--B4
Published on 18 June 1984
Drawings for metal hull of ships1985-04-01Implemented
National Standard of the People's Republic of China
Drawings for metal hull or sbips - bisectingUDC 629,12.011
GB 4476.4-84
This standard applies to the metal hull drawings of ships assisted by the use of ships and vehicles. Other hull drawings, ship machinery and ship electrical systems, except for their own points, can be used as a reference.
In the cases not clearly specified in this standard, they should be drawn in accordance with the national standard "Mechanical Drawing". General principles
1.1 The positioning dimensions of the hull structure should be marked by the distance between the theoretical line of the component and the reference line (baseline, center line of the ship, stern perpendicular, etc.). When it is not in accordance with the "Theoretical Line of the Hull Structure" standard, the symbol "" is used to indicate the theoretical line position of the component. 1.2 The dimensions of a structure are marked only once. Components with the same specifications or dimensions can be marked only once. The dimensions should be marked on the most clear part of the component.
2 General provisions
The zero height direction of the positioning dimension is from the centerline, waterline, width direction is from the centerline of the hull, ship's touch, and the length direction is from the centerline of the ship, the station line, and the rib line.
The dimensions to be determined are marked with the symbol "~" and the dimensional numbers. 2.1 Dimension lines
2.1.1 Dimension lines are drawn with thin solid lines, and their two ends are pointed to the dimension boundaries with solid arrows, Figure 1. Figure 1
2.1.2 Dimension lines must be parallel to the marked line segments. Dimension lines cannot be replaced by other drawing lines. Generally, they cannot coincide with other drawing lines or be on the same line (wheel lines, axis lines, center lines and dimension boundaries are not allowed to be used as dimension lines). Published by the National Bureau of Standards on June 18, 1984
Implemented on April 1, 1985
GB4476, 4-
2.1.3 The spacing between dimension lines shall not be less than 4 mm. 84
2.1.4 When marking the diameter of a circle or the radius of a circle, the dimension line shall be drawn according to Figure 2. When the radius of an arc is too large or the center position of the circle cannot be marked within the scope of the drawing, it shall be marked in the form of Figure 3. 902
R 1o0t
2.1.5 When there is no visible position to draw a rib or write a number, it may be marked in the form of Figure 4. 4
2.1. When marking the dimension of a line segment, the dimension line shall be parallel to the arc to be marked, as shown in Figure 5. 26
2.2 Dimension boundary
GB 44.76.4—84
2.2.1 Dimension boundary shall be drawn with thin solid line and shall be drawn from the theoretical line, station line, rib line, axis line, center line, bend line, etc. of the component. These lines and curve wheel line can also be used as dimension boundary. See Figures 1, 5 and 6. Distance 8 is 3354
Axis center line
Single board surface
2.2.2 Dimension boundary shall generally be parallel to the dimension line, and tilt is allowed when necessary. 2.2.3 When the dimension line is long, the dimension boundary of the standard line is omitted, see Figure 7 Ground 4350
Electric 15 Strong 2504
2.2.4 When marking the dimension at the smooth transition, the theoretical line must be extended with a thin solid line, and the dimension boundary shall be drawn from their intersection, see Figure 8.
2.3 Mathematical flags and
GB 4476. 4 -- 84
2.3.1 Only numbers are usually filled in above or at the end of the scale line. When the space is not enough, it can also be marked. 2:3.2 The size number should not be passed by the drawing line. 2.3.3 When the components are distributed at equal distances, the marking method of Figure 5 and Figure 9 can be used. 3×700
2.34 When marking the size of the curved contour, the value table can be used, such as Table 1 and Figure 10. 1
(half width)
GB 4476:4—84
2.3.5 The marking of the inclination of the front knee of the smoke mark and the printing chamber should use the direct coordinate method, and it is not appropriate to use angle marking. 300
2.3.6 Drawings. The size of the opening of a small shape is marked as the short side × the long side, and "R" is used to represent the radius of the four corners. The opening of the window refers to the lowest height of the lower edge of the door opening from the deck edge. The same opening is the vertical distance from the center of the riser to the upper edge of the deck under the wall, and the size can be marked as one.
The method of marking the opening size of manholes (must be indicated in words), lightening holes, etc. is shown in Figure 12. d50 × 6o
2.3.1 The size of the openings of water holes, through-welding holes, vent holes, etc. is marked as shown in Figure 13. 10×10
Size 1 industry
2.4 The size of plates, single materials, combined profiles, brackets, etc. is marked according to the serial number in Table 2
Folded plate
Square steel
Semi-circular pot
Spherical steel
GB 4476.届-84
Pregnancy × widthbzxZ.net
Thickness width × length
Thickness × separation
Folding width
Width thickness
Outer diameter × thickness
Degree original degree
Diameter × original degree
Commercial degree × ball width × whole thickness
Over width × side width × side lifting
Length near width × hot side width side pregnancy
Marking method example
12×1500
12 × 1500 ×6000
6 ×250
100×8
@ 108 ×
口100 ×s
0 50 x25
200×44×10
10×12
L 160 ×100 ×4
unequal
symmetric bulb flat steel
T-shaped steel
I-shaped steel
component profile
combined bulb fan solution
combined angle steel
GB 4476.4-B4
Continued Table 2
Dimensions
Long side width × known side × side sequence
Short side thickness
Height × ball width × total thickness
Original length × width (panel)
Total height panel)
Height * width × thickness
Height × width × thickness
Length × height (Jiaoban)
Round steel diameter
Long side thickness × long side width
Short side sequence × short side widthSteel diameter
Longest length × length and width (limited length)
Short side × short width
Marking square example
L 300 × 90 ×11.5/ 16
360 × 136 × 14
T 50 b
24 × 180
14X500
200*$ 7
I 270× 122 8,5
20 × 30
12×8h
6× 300（15)
Newcomb profile
Combined angle steel
Combined T-shaped steel
Combined workpiece steel
Combined energy frame
T-shaped plate
GB 4476.4--B4
Continued Table 2
Dimensions
Text edge thickness × cross edge
Short edge thickness × Liu edge responsibility (eye length)
Long complaint original × length fixed
Short complaint floating × bear edge observation
Degree × height (amine board)
Thickness × width (panel)
Thickness × height (web board)
2 (degree × width) (South carbon)
2 (thickness × height change) (Ai Shu)
Thickness × width (also version)
Degree × length × side length
Degree × width (panel)
H degree (axillary board)
Depth × width (two boards)
Hot injection method example
G × 300
×800×800
12×120
12×120
B×120(15)
12x300
16×120
2(10120)
2(12×5mm)
Flanged plate
Anti-frequency bracket
Additional instructions:
GB 4476.4—84
Continued Table 2
Dimension meaning
Thickness×side length×side length
Flanged width
Flanged degree
Pregnancy Side length Side length
This standard is proposed by China State Shipbuilding Corporation: This standard is drafted by the Metal Ship Structure Drawing Compilation Group. The main drafter of this standard is Wang Huaiyu. From the date of implementation of this standard, the original department standard CB, 3009-77 will be used. Marking method example
B × 250 × 250
* 800 × 30
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