Some standard content:
Engineering Construction Standard Full-text Information System
Industry Standard of the People's Republic of ChinabZxz.net
Drawing Standard
of heat-supply engineering
CJJ/T78—97
1997Beijing
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Industry Standard of the People's Republic of China
Drawing Standard
of heat-supply engineering heat-supplyengineering
CJJ/T78—97
Editor: Harbin University of Architecture
Approval department: Ministry of Construction of the People's Republic of China Effective date: June 1, 1998
Engineering Construction Standard Full-text Information System
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Engineering Construction Standard Full-text Information System
About the release of the industry standard "Heating Engineering|| tt||Notice on the "Drawing Standard"
Construction Standard [1997] No. 346
Construction Committees (Construction Departments) of all provinces, autonomous regions, and municipalities directly under the Central Government, and Construction Committees of independently planned cities and relevant departments of the State Council:
According to the requirements of the Ministry of Construction's Document No. [1992] 227, the "Heating Engineering Drawing Standard" edited by Harbin University of Architecture has been reviewed and approved as a recommended industry standard, numbered CJJ/T78-97, and will be implemented on June 1, 1998. This standard is managed by the Ministry of Construction's Urban Construction Standards and Technology Management Unit, the Ministry of Construction's Urban Construction Research Institute, and its specific interpretation work is the responsibility of Harbin University of Architecture. This standard is organized and published by the Ministry of Construction's Standards and Norms Research Institute. Ministry of Construction of the People's Republic of China
December 24, 1997
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
General Principles:
General Provisions
2.1 Drawing Size
2.2 Drawing Lines
2.3 Fonts
2.4 Proportion...
2.5 General Symbols and Design Boundaries
2 .6 Numbering of equipment and parts, etc.
3 Basic rules for drawing
3.1 Drawings
Pipeline specifications
Dimension markings
Pipeline drawing
3.6 Valve drawing
4 Commonly used codes and graphic symbols
General rules·
4.2 Pipeline code:
4.3 Graphic symbols and codes
5 Boiler room drawing method·||t t||5.1 Flowchart
5.2 Plan and section drawings of equipment and pipelines
5.3 Plan and section drawings of blast and induced draft system pipelines·5.4 Plan and section drawings of coal loading and slag removal system·6 Drawing method of heat network diagram
Engineering construction standard full text information system
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Engineering construction standard full text information system
6.1 Plan drawing of heat network pipelines
6. 2 Heat network pipeline system diagram
6.3 Pipeline longitudinal section diagram
.........0
6.4 Pipeline cross section diagram
·········
000090606000600000000000000
0.06.0000
600600000
..5 Pipeline node inspection room diagram 7
． Anticorrosion and thermal insulation structural drawing
Water pressure diagram
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How to draw drawings of heating stations and relay pumping stations
Equipment, pipeline plan and section drawing
Piping system diagram
Flowchart
Terms used in this standard
Additional instructions
Engineering construction standard full text information system
Engineering construction standard full text information system
1 General provisions
This standard is formulated in order to unify the drawing methods of heating projects, ensure the quality of drawings, improve work efficiency, and facilitate technical exchanges. 1.0.1
This standard is applicable to the design and drawing of new, expanded or renovated heating projects. 1.0.2
3Drawing regulations not covered by this standard shall comply with the relevant current national standards. Engineering Construction Standard Full Text Information System
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Engineering Construction Standard Full Text Information System
General Provisions
2.1 Drawing Format
The basic format and frame size of the drawing should comply with the provisions of Table 2.1.1 and the format of Figure 2.1.1. The frame line should be thick solid line, and the outer frame line of the title bar should be medium solid line.
Basic format and drawing frame size (mm)
Format code
841×1189
594×841
420×594
Frame line
297×420
210×297
Drawing line
Centering symbol
Title bar
Figure 2.1.1 Drawing format
2The short side of the basic drawing format should not be lengthened, but the long side can be lengthened. The extended size, for the format codes A0, A2, and A4, should be an integer multiple of 150mm; for the format codes A1 and A3, it should be an integer multiple of 210mm. If the short side of the basic format is extended, the long side will not be extended, and the drawing format used should comply with the relevant provisions of the current national standard "Format and Format of Technical Drawing Drawings" GB/T14689. 2.1.3 The four sides of the drawing frame should have a centering symbol located at the midpoint of the frame line of each side; the centering symbol should be drawn with a thick solid line, and its length should extend 5mm from the drawing line into the frame line.
2.2 Drawing Lines
The basic width b of the drawing lines should be selected from 2.0, 1.4, 1.0, 0.7, 0.5 mm, and the value should be selected according to the type, scale and complexity of the drawing. The line width can be divided into three types: thick, medium and thin, and the line width ratio should be b-2.2.2
The width of the same line type on most drawings in a set of drawings and on a drawing should be consistent.
Common line types and their uses should comply with the provisions of Table 2.2.3. 2.2.3
Common line types and their uses
Thick solid line
Medium solid line
Thin solid line
Thick dashed line
Engineering Construction Standard Full-text Information System
1. Pipes represented by single lines
2. Equipment outline lines in equipment plan and section drawings3. Numbering marking lines for equipment and parts, etc.4. Sectioning position lines
1. Pipes represented by double lines
2. Equipment outline lines in equipment and pipeline plan and section drawings3. Dimension start and end marks||t t||1. Visible outlines of buildings and structures 2. Dimension lines and dimension boundaries
3. Graphic symbols for material sections, equipment and accessories, etc. 4. Numbering and marking lead lines for equipment, parts and pipeline accessories, etc.
5. Pipeline cross section represented by single line
6. Outline of equipment and pipeline accessories in pipeline plan and section drawing
1. Pipeline represented by single line that is avoided
2. Outline of equipment that is blocked in equipment plan and section drawing
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Medium dotted line
Thin dotted line
Thin broken line
Thin wavy line
Thin double dotted line
1. Pipelines represented by double lines that are blocked
Continued Table 2.2.3
2. Contours of blocked equipment in equipment and pipeline plan and surface drawings
3. Planned equipment and pipelines
1. Contours of blocked buildings and structures 2. Contours of planned buildings|| tt||3. Outline of equipment and pipeline accessories that are blocked in pipeline plan and section drawings
1. Positioning axis of building
2. Equipment centerline
3. Centerline of trench or groove
4. Centerline of pipeline represented by double lines
5. Centerline or symmetry axis of pipeline accessories or other parts1. Disconnection line of building
2. Disconnection line when pipeline, building and structure are cut at the same time
3. Disconnection line of equipment and other parts
1.The free disconnection boundary of non-circular cross-section pipelines represented by double lines 2. The imaginary wheel line of the free disconnection boundary of equipment and other components
The drawing method of dotted lines, dot-dash lines, double dot-dash lines and broken lines shall comply with the provisions of Figure 2.2.4. The length and interval of the dashed lines, dot-dash lines and double dot-dash lines in the same drawing shall be consistent, and the points of the dot-dash lines and double dot-dash lines shall make the intervals evenly divided. The dashed lines, dot-dash lines and double dot-dash lines shall turn or intersect on the line segments. When the drawing format is large, dashed lines, dot-dash lines or double dot-dash lines with longer line segments can be used.
2x(3-6)
Figure 2.2.4 Several ways to draw lines
Note: The units of the figures in the figure are millimeters
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
2.3 Font
2.3.1 The Chinese characters in the drawings should be in long Fangsong font, and their height and width should comply with the provisions of Table 2.3.1. The height of Chinese characters should not be less than 3.5mm. The height and width of Chinese characters in long Fangsong font (mm) Character height
Numbers and letters should be in straight font.
Chinese characters, numbers and letters for the same purpose in the same drawing or in the same set of drawings should be the same size
.
Proportions should be expressed in Arabic numerals. When there is only one scale on a drawing, the scale should be marked in the title bar. When there are several scales on a drawing, the scale should be marked on the right or below the drawing name (Figure 2.4.1).
Plane drawing 1:100
Plane drawing
Scale marking
Pipeline longitudinal section
Vertical direction 1:50
Horizontal direction 1:500
2Marking when different scales are used in two directions
When different scales are used in the vertical direction and horizontal direction of the same drawing, the scales of the two directions should be marked separately (Figure 2.4.2). 2.4.3 Different views and section drawings of the same object should use the same scale. Commonly used scales should comply with the provisions of Table 2.4.4. 2.4.4
Common Scales
Boiler Room, Heat Station and Relay Pump Station Diagram
Heating Planning
Heating Network Pipeline Plan
Heating Network Pipeline System Diagram
Feasibility Study
Preliminary Design
Construction Drawing
Engineering Construction Standard Full Text Information System
1 : 20,1 : 25,1 : 30,1 : 50,1 : 100,1 : 2001:10000,1:20000,1+25000
1:5000,1:10000
1:20001:5000
1:500,1*1000
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Engineering Construction Standard Full-text Information System
Pipeline longitudinal plane drawing
Pipeline cross-section drawing
Pipeline node and inspection room drawing
Continued Table 2.4.4
Vertical direction 1:501+100
Horizontal direction 1:500,1,1000
1:10,1:20,1:50,1:100
120,125,130,150
1:1,1:21:5,1:10,1+20
2.5 General symbols and design dividing lines
2.5.1 The compass should be represented by a thin solid circle with a pointer (Figure 2.5.1). The diameter of the circle should be 24mm, the width of the tail of the pointer should be 3mm, the tip should be north, and the pointer should be dark. When the drawing is large and a larger compass is required, the width of the tail of the pointer should be 1/8 of the diameter of the circle.
Figure 2.5.1 Compass
Arrow drawing method
The arrow drawing method should comply with the provisions of Figure 2.5.2. The slope of the pipeline should be indicated by a single-sided arrow (Figure 2.5.3). The arrow points to the direction of the lowering elevation, and the straight part of the arrow should be 1 to 2mm longer than each end of the number. 0.002
Figure 2.5.3 Pipeline ramp
The section symbol should indicate the sectioning position and section direction, and the section code number should be marked (Figure 2.5.4). The marking method shall comply with the following provisions: 2.5.4.1 The section position shall be indicated by a thick solid line, the length of which should be 4~6mm; 2.5.4.2 The section direction may be indicated by the marked position of the number (letters or Arabic numerals) (viewed from the numbered side to the other side), or by an arrow (Figure 2.5.4 Engineering 6 Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
2.5.4.3 The section number shall be marked at the start and end of the section position line or at the tail of the arrow indicating the section direction. The number of the visual symbol of any direction and angle shall be marked horizontally (Figure 2.5.4(b));
2.5.4.4 At the turning point of the section position, when there is no confusion with other drawing lines, the number may not be marked (Figure 2.5.4(c)).
Figure 2.5.4 Section Symbols
2.5.5 The elevation symbol and its marking method shall comply with the following provisions (Figure 2.5.5): 2.5.5.1 The elevation symbol shall be an isosceles right triangle drawn with thin solid lines, and the height shall be 3mm. Its vertex shall fall on the marked height line or its extension line, and the vertex may be upward or downward (Figure 2.5.5(a));
2.5.5.2 The elevation value shall be marked on the base of the triangle and its extension line. The length L of the extension line of the base of the triangle shall exceed the length of the number by 1 to 2mm. The elevation value shall be in meters. Positive elevations shall not be marked with "+10"; negative elevations shall be marked with "+2", and the zero elevation shall be written as ±0.00 or ±0.000 (Figure 2.5.5(a));
Elevation symbols and marking methods
Engineering Construction Standards Full-text Information System
TKAONT KAca-1, 1000
1:10, 1:20, 1:50, 1:100
120, 125, 130, 150
1:1, 1:21:5, 1:10, 1+20
2.5 General symbols and design boundary lines
2.5.1 The compass should be represented by a thin solid circle with a pointer (Figure 2.5.1). The diameter of the circle should be 24mm, the width of the pointer tail should be 3mm, the tip should be north, and the pointer should be dark. When the drawing is large and a larger compass is required, the width of the pointer tail should be 1/8 of the circle diameter.
Figure 2.5.1 Compass
Arrow drawing
The arrow drawing should comply with the provisions of Figure 2.5.2. The slope of the pipeline should be represented by a single-sided arrow (Figure 2.5.3). The arrow points to the direction of decreasing elevation, and the straight part of the arrow should be 1 to 2 mm longer than each end of the number. 0.002
Figure 2.5.3 Pipeline ramp
The section symbol should indicate the section position and section direction, and the section code should be marked (Figure 2.5.4). The marking method shall comply with the following provisions: 2.5.4.1 The section position shall be indicated by a thick solid line, the length of which should be 4~6mm; 2.5.4.2 The section direction may be indicated by the marked position of the number (letters or Arabic numerals) (viewed from the numbered side to the other side), or by an arrow (Figure 2.5.4 Engineering 6 Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
2.5.4.3 The section number shall be marked at the start and end of the section position line or at the tail of the arrow indicating the section direction. The number of the visual symbol of any direction and angle shall be marked horizontally (Figure 2.5.4(b));
2.5.4.4 At the turning point of the section position, when there is no confusion with other drawing lines, the number may not be marked (Figure 2.5.4(c)).
Figure 2.5.4 Section Symbols
2.5.5 The elevation symbol and its marking method shall comply with the following provisions (Figure 2.5.5): 2.5.5.1 The elevation symbol shall be an isosceles right triangle drawn with thin solid lines, and the height shall be 3mm. Its vertex shall fall on the marked height line or its extension line, and the vertex may be upward or downward (Figure 2.5.5(a));
2.5.5.2 The elevation value shall be marked on the base of the triangle and its extension line. The length L of the extension line of the base of the triangle shall exceed the length of the number by 1 to 2mm. The elevation value shall be in meters. Positive elevations shall not be marked with "+10"; negative elevations shall be marked with "+2", and the zero elevation shall be written as ±0.00 or ±0.000 (Figure 2.5.5(a));
Elevation symbols and marking methods
Engineering Construction Standards Full-text Information System
TKAONT KAca-1, 1000
1:10, 1:20, 1:50, 1:100
120, 125, 130, 150
1:1, 1:21:5, 1:10, 1+20
2.5 General symbols and design boundary lines
2.5.1 The compass should be represented by a thin solid circle with a pointer (Figure 2.5.1). The diameter of the circle should be 24mm, the width of the pointer tail should be 3mm, the tip should be north, and the pointer should be dark. When the drawing is large and a larger compass is required, the width of the pointer tail should be 1/8 of the circle diameter.
Figure 2.5.1 Compass
Arrow drawing
The arrow drawing should comply with the provisions of Figure 2.5.2. The slope of the pipeline should be represented by a single-sided arrow (Figure 2.5.3). The arrow points to the direction of decreasing elevation, and the straight part of the arrow should be 1 to 2 mm longer than each end of the number. 0.002
Figure 2.5.3 Pipeline ramp
The section symbol should indicate the section position and section direction, and the section code should be marked (Figure 2.5.4). The marking method shall comply with the following provisions: 2.5.4.1 The section position shall be indicated by a thick solid line, the length of which should be 4~6mm; 2.5.4.2 The section direction may be indicated by the marked position of the number (letters or Arabic numerals) (viewed from the numbered side to the other side), or by an arrow (Figure 2.5.4 Engineering 6 Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
2.5.4.3 The section number shall be marked at the start and end of the section position line or at the tail of the arrow indicating the section direction. The number of the visual symbol of any direction and angle shall be marked horizontally (Figure 2.5.4(b));
2.5.4.4 At the turning point of the section position, when there is no confusion with other drawing lines, the number may not be marked (Figure 2.5.4(c)).
Figure 2.5.4 Section Symbols
2.5.5 The elevation symbol and its marking method shall comply with the following provisions (Figure 2.5.5): 2.5.5.1 The elevation symbol shall be an isosceles right triangle drawn with thin solid lines, and the height shall be 3mm. Its vertex shall fall on the marked height line or its extension line, and the vertex may be upward or downward (Figure 2.5.5(a));
2.5.5.2 The elevation value shall be marked on the base of the triangle and its extension line. The length L of the extension line of the base of the triangle shall exceed the length of the number by 1 to 2mm. The elevation value shall be in meters. Positive elevations shall not be marked with "+10"; negative elevations shall be marked with "+2", and the zero elevation shall be written as ±0.00 or ±0.000 (Figure 2.5.5(a));
Elevation symbols and marking methods
Engineering Construction Standards Full-text Information System
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