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GB/T20001 "Standard Writing Rules" is divided into the following parts: Part 1: Terminology; Part 2: Symbols; Part 3: Information Classification and Coding; Part 4: Chemical Analysis Methods. GB/T20001.2-2001 This part is Part 2 of GB/T20001, replacing GB/T1.5-1988 "Standard Writing Rules for Symbols and Codes for Standardization Work Guidelines". This revision readjusted the original standard in accordance with GB/T1.1-2000. Compared with GB/T1.5-1988, the provisions of this part are more specific and more operable. The main changes are as follows: - The name of the standard is modified; - The overall structure of the standard is modified according to GB/T1.1-2000; - The term "text symbol" is added (see 3.3); - Chapter 4 "Basic requirements for standard preparation" is changed to "General principles", and the content related to "coordination" is added; - More detailed provisions are made for the reference of symbols between standards (see 6.5); The symbol index is changed from page number index to symbol number index, and The indexing method of symbol names beginning with foreign languages or Arabic numerals has been added (8.2 of GB/T1.5-1988; 6.4 of this edition); more detailed provisions have been made on the compilation of the symbol table, and a registration number column has been added (7.3 of GB/T1.5-1988; Chapter 7 of this edition); the table examples in the appendix have been adjusted, and new table examples have been added (Appendix A of GB/T1.5-1988; Appendix B of this edition); the informative appendix "Symbols and Related National Standards" has been added (see Appendix A). GB/T20001 is one of a series of national standards such as guidelines, guidelines and compilation rules for standardization work. The following lists the expected structure of these national standards and their corresponding international standards, guidelines, and national standards that will be replaced; a) GB/T1 "Guidelines for Standardization Work"
Part 1: Structure and writing rules for standards (ISO/IEC Guide Part 3, replacing GB/T1.1-1993, GB/T1.2-1996);
-Part 2: Methods for formulating standards (ISO/IEC Guide Part 2, replacing GB/T1.3-1997, GB/T1.7-1988);
Part 3: Technical work procedures (ISO/EC Guide Part 1, replacing GB/T16733-1997). GB/T20000 "Guidelines for Standardization Work"
Part 1: Common vocabulary for standardization and related activities (ISO/IEC Guide 2, replacing GB/T3935.1-1996); - Part 2: Rules for the adoption of international standards (ISO/IEC Guide 21); - Part 3: Rules for referenced documents (ISO/EC Guide 15, replacing GB/T1.22-1993); - Part 4: Preparation of safety-related content in standards (ISO/EC Guide 51); - Part 5: Preparation of environmental content in product standards (ISO/IEC Guide 64). c) GB/T20001 "Rules for Writing Standards" Part 1: Terminology (ISO10241, replacing GB/T1.6-1997); - Part 2: Symbols (replacing GB/T1.5-1988); - Part 3: Information Classification and Coding (replacing GB/T7026-1986); I
GB/T20001.2-2001
- Part 4: Chemical Analysis Methods (ISO78-2, replacing GB/T1.4-1988). Appendix A and Appendix B of this part are informative appendices. This part was proposed by the China Standards Research Center. This part is under the jurisdiction of the National Technical Committee for Standardization of Graphic Symbols (CSBTS/TC59). Drafting units of this part: China Standards Research Center, Mechanical Science Research Institute, Standard and Quota Department of the Ministry of Construction. The main drafters of this part: Bai Dianyi, Zhang Liang, Chen Yuanqiao, Qiang Yi, Guo Ting, Wei Ming. GB/T1.5 was first issued in December 1988, and was revised for the first time in 2001 and the standard number was re-determined as GB/T20001.2. 1 Scope
Standard Writing Rules
Part 2: Symbols
GB/T20001.2—2001
This part of GB/T20001 specifies the structure and writing rules of symbol (including text symbols and graphic symbols) standards. This part is applicable to the writing of symbol standards in national standards and industry standards. It can be used as a reference for the writing of local standards and enterprise standards. It can also be used as a reference for the writing of non-symbol standards containing symbol content. 2 Normative References
The clauses in the following documents become the clauses of this part through reference in this part of GB/T20001. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, parties to an agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For any undated referenced documents, the latest version shall apply to this part.
GB/T 1.1-2000 Guidelines for Standardization Part 1: Structure and drafting rules of standards (ISO/IEC Directives, Part 3, 1997, Rules for the structure and drafting of International Standards Standards, NEQ) GB/T 1.6-1997 Guidelines for standardization work Unit 1: Rules for drafting and expressing standards Part 6: Provisions for the preparation of terminology standards (neq ISO 10241: 1992) 1) GB/T 15565-1995 Graphic symbol terminology || tt || GB/T 16900 Rules for the representation of graphic symbols General provisions GB/T 16901 (all parts) Rules for the representation of graphic symbols Graphical symbols for technical documents (eq V ISO/EC 11714) GB/T 16902.1 Rules for the representation of graphic symbols Graphical symbols for equipment (eq V ISO 3461-1) GB/T 16903 (all parts) Rules for the representation of graphic symbols Graphical symbols for signs 3 Terms and definitions || tt || Chapter 3 of GB/T 1.1-2000 and GB/T 15565-1995 and the following terms and definitions apply to this part of GB/T 20001. For convenience, some terms in GB/15565-1995 are repeated below. 3.1
Symbolsymbol
Visual image with simplified features that can express certain things or concepts formed by writing, drawing, printing, etc. [GB/T15565-1995, Definition 2.1]
Graphicalsymbolgraphicalsymbol
Symbol that expresses certain things or concepts with graphics or images as the main features. [GB/T15565-1995, Definition 2.2]
Lettersymbollettersymbol
Textcode
Symbol that expresses certain things or concepts using letters, numbers, Chinese characters, etc. or their combination. 1) This standard will be revised and renumbered as GB/T20001.1 (see the foreword). 1
GB/T20001.2—2001
4 General
4.1 Basic requirements
The preparation of symbol standards shall comply with the provisions of GB/T1.1—2000, and the graphic symbols in the standards shall also comply with the provisions of GB/T16900~16903.
4.2 Coordination
When formulating symbol standards, the rules of existing basic symbol national standards shall be followed to ensure the overall coordination of symbol standards. The symbols in the standards shall be coordinated with the existing symbol standards. Appendix A gives the symbols and relevant national standards. 5 Structure
The content and hierarchical division of symbol standards shall comply with GB/T1.1-2000 Chapter 5. Table 1 gives a typical example of the arrangement of elements in a symbol standard and lists the allowed content of each element. When writing a standard, the relevant elements in Table 1 can be selected according to the specific characteristics of the standardization object and the purpose of formulating the standard. The symbol standard may also contain other normative technical elements outside of Table 1.
Table 1 Typical arrangement example of elements in symbol standards Element type
Informative overview element
Normal general element
Normal technical requirements
Non-normative references
Terms and definitions
Symbol number
Symbol name
Symbol description
Graphical symbol
Standardized content allowed by the specification
Numerical content 77-20 67.1 (Generation of GR/T 1.1200 1 .2)
Name text
Guide
Reference documents
Element type
Informative supplementary elements
Normative technical elements
Informative supplementary requirements,
Edition of "Guidelines"
Normative appendix
Reference documents
Table 1 (continued)
Reference documents
GB/T20001.2—2001
Contents allowed for elements
(For the content, see 6.4.3 of GB/T7.7:200 and 6:4.2~-5.1 of this part.) 5)
, bold indicates "essential elements" \\ triple indicates "regulatory elements": italics indicate "material elements" The information record cannot contain normative elements. 6 Drafting
6.1 Information overview elements
Symbols The writing of the cover, table of contents, preface and introduction of the standard shall comply with the provisions of 6.1 of GB/T1.1-2000. 6.2 Normative general elements
6.2.1 General
Symbols The writing of the scope and normative reference documents in the standard shall comply with The name of the symbol standard shall be in accordance with the provisions of 6.2.2 and 6.2.3 of GB/T1.1-2000. 6.2.2 Standard name
The name of the symbol standard shall be in accordance with the provisions of 6.2.1 of GB/T1.1-2000. The name of the symbol standard shall distinguish the category of the symbol, such as: - electron tube parameter symbol;
hydraulic system working medium solid particle pollution level code; gas laser text symbol;
metal ship body drawing graphic symbol.
Note: The underlined text is Category of symbols. The standard name of graphic symbols should be able to distinguish the category of graphic symbols (see GB/T16900), such as: fire equipment graphic symbols for fire technical documents; graphic symbols for electrical schematics;
graphic symbols for ship layout drawings;
graphic symbols for electrical equipment; wwW.bzxz.Net
public information graphic symbols for signs.
Note: The underlined text is the category of graphic symbols. 6.3 Normative technical elements
6.3.1 Terms and definitions The compilation shall comply with the provisions of 6.3.1 and Appendix C of GB/T1.12000. 6.3.2 Symbol numbers, symbols, symbol names, symbol descriptions and graphic symbol registration numbers shall be listed in the form of a table. The vertical columns of the table are number column, symbol column, name column, description column and registration number column from left to right, as shown below: Example: Tables B.1 to B.6 in Appendix B give examples of the arrangement of symbol and mark tables. 6.3.3 Text symbols, if they appear in the form of terms (names), symbols and definitions, can be arranged according to the provisions of 6.4 of GB/T1.6-1997 for numbers, terms (names), symbols and definitions. These contents can also be arranged in a table as shown below (see Table B.7): Example:
6.3.4 When the standard gives the original graphic symbol for equipment, the arrangement of the number, graphic symbol, name, description and registration number is as follows (Figure B.1 gives the corresponding standard arrangement example): XXXX (number)
(graphic symbol)
XXX (name)
XXXX (English equivalent)
XXXXXXXXXXXXXXXXXX
XXX (description)
Registration number: XxXXXx
6.3.5 The symbol standard may also specify some other related contents, such as color, orientation (whether the symbol can be turned), the drawing method of graphic symbols, the rules and methods of production and application, etc.
6.3.6 The preparation of normative appendixes shall comply with the provisions of 5.2.6 and 6.3.8 in GB/T1.1-2000. 6.3.7 If necessary, the relevant contents in 6.3.5 may be compiled into the appendix. The chromaticity coordinates or color scale may also be given in the appendix. 6.4 Informative supplementary elements
6.4.1 The compilation of informative supplementary elements shall comply with the provisions of 5.2.6 and 6.4 of GB/T1.1-2000. 6.4.2 The symbol standard should compile the Chinese name of the symbol and the English equivalent index of the Chinese name. If the number of symbols exceeds 50, an index should be compiled.
6.4.3 The Chinese name index shall be arranged in the order of the Chinese phonetic letters of the symbol name; the English equivalent index of the Chinese name shall be arranged in the order of the Latin letters.
6.4.4 If the symbol name begins with Arabic numerals or foreign letters or is composed entirely of foreign letters, then in the Chinese name index of the symbol, such names shall be arranged after the Chinese characters in the order of Arabic numerals, Latin letters, and Greek letters. 4
GB/T20001.2—2001
6.4.5 The index content includes: the Chinese name of the symbol (or the English equivalent) and its number in the standard, and the name and number are connected by the symbol ".".
6.5 Reference
6.5.1 When a specific symbol is referenced in a symbol standard, the symbol number should be given in parentheses after the year of the standard. 6.5.2 When citing symbols in other standards, it is not appropriate to give the graphics of the specific symbol. The following methods can be used to indicate: a) Give the number of the referenced standard; when citing without a date, give the standard code and serial number. Example:
- "For other relevant graphic symbols, see GB/T10001—2000"; - "For other relevant graphic symbols, see GB/T10001". b) Give the number of the specific symbol.
Example:
The following graphic symbols are also applicable to this field: - Graphic symbols for taxis, see GB/T10001-2000 (01); - Graphic symbols for ticketing services, see GB/T10001-2000 (45); - Graphic symbols for Chinese food, see GB/T10001-2000 (58); - Graphic symbols for flowers, see GB/T10001-2000 (62). 6.5.3 In order to maintain the integrity of the symbol system in the standard, a small number of symbols from other standards may also be listed in the standard. In this case, the standard number and symbol number of the symbol in the original national or industry standard should be listed in the symbol description column (see 7.4.3). In this case, the original standard should be listed in the references.
7 Rules for compiling symbol tables
7.1 Number column
7.1.1 In the same standard, a symbol can only have one number, that is, a number only corresponds to a unique symbol. 7.1.2 The symbol numbering format should be different from the chapter and article numbering of the standard and should comply with the following principles: 1. The maximum number of characters in the numbering is 11;
1. The numbering should use Arabic numerals, letters and the symbol "_" as a hierarchical interval; 1. The symbol numbering format in the same standard should be unified, the number of characters should be the same, and "0" should be used to fill in the missing number of characters. See the symbol numbers in the numbering column in Table B.1 to Table B.7. 7.2 Symbol column
7.2.1 The order of symbols in the symbol column can be arranged according to the following principles: 1. Arrange the order according to professional classification: that is, divide the symbols according to the professional category, and arrange the order of symbols according to professional requirements. For example, GB/T4728.5 "Graphic Symbols for Electrical Schematics Part 5: Semiconductor Tubes and Electron Tubes" divides the graphic symbols into: semiconductor tubes, electron tubes, ionizing radiation detection devices and electrochemical device symbols. 1. Arrange the order according to functional classification: that is, divide the symbols according to their functions, and arrange the symbols with the same or similar functions together. 1. Arrange by classification: general symbols first, special symbols second; general symbols first, special symbols second, trunk symbols first, branch symbols second, etc.
1. Arrange by the Chinese phonetic alphabet of the symbol name: If the symbol cannot or does not need to be classified, arrange it by the Chinese phonetic alphabet of its name.
7.2.2 The table spacing of the symbol column of the graphic symbols used in technical documents should not be less than 20mm (see Table B.1). The graphic symbols should be as symmetrical as possible in the symbol column, and the ratio of the graphic symbols to the surrounding blank space should be appropriate. The grid system (0.1M or 0.125M) used for the design symbols should be described in accordance with the provisions of GB/16901.1.
7.2.3 Graphic symbols for equipment should be given together with the superscript (see Table B.2). The size of the square defined by the four superscripts should be 25mmX25mm. If the original image of the graphic symbol is given in the standard, the size of the square defined by the four superscripts should be 75mm×75mm (see Figure B.1).
GB/T20001.2—2001
7.2.4 Graphic signs generally have four shapes. Graphic signs of different shapes should be given in the symbol column according to the following dimensions (see Table B.4 to Table B.7):
The side length of a square sign is 45mm
The side length of an oblique square sign is 45mm; the diameter of a circular sign is 50mm;
The side length of an equilateral triangle sign is 63mm.
When the sign has a border, the above dimensions include the size of the border. If the sign specified in the standard has other content besides the graphic symbol, such as text, the given size should be based on the graphic symbol and should not include other content.
7.3 Name column
7.3.1 For each symbol, its corresponding name or meaning should be given in the name column. 7.3.2 According to the principle that one graphic symbol corresponds to one meaning (see GB/T16900), the name (or meaning) of the graphic symbol in the standard should correspond to the graphic symbol one by one, that is, there should not be a graphic symbol with the same name (or meaning) in a standard, and a graphic symbol should not have more than one name (or meaning).
7.3.3 In addition to the Chinese name, the corresponding English equivalent should be listed under the Chinese name in the name column. If the symbol in the standard is derived from an international standard or an advanced foreign standard, and there is a corresponding English equivalent, the English equivalent of the Chinese name of the symbol should be given in the standard. 7.4 Description column
7.4.1 The description column should generally give a more detailed description of the function of the listed symbol, specific usage occasions and other related contents. 7.4.2 If the symbol in the international standard is used, the corresponding international standard number and the symbol number (or registration number) of the symbol in the international standard should be listed.
Example 1: It is exactly the same as the symbol 027 in ISO70011990, which can be expressed as: ISO7001:1990 (027) Example 2: It is basically the same as the symbol 007 in ISO70011990, but with a few modifications, which can be expressed as: ISO7001, 1990 (007), modified 7.4.3 If a symbol quotes a symbol in a national standard or industry standard, the standard number of the national standard or industry standard quoted and the symbol number of the symbol in the standard should be listed. Example: Quoting the symbol 22 in GB/T10001-2000, it can be expressed as: Quoting GB/T10001-2000 (22) 7.4.4 When revising a standard, if a symbol replaces one or more symbols in the original standard, it is advisable to list the original standard number and the symbol number of the replaced symbol in the original standard.
Example: To replace the symbol numbered 8 in GB3818-1983, it can be expressed as: Replace GB3818-1983 (8) 7.4.5 Other contents related to the symbol can also be written as needed. These contents can also be written outside the table. 7.4.6 If all symbols can be understood without explanation and there is no other content that needs to be explained, the explanation column can be omitted (see Table B.4). 7.5 Registration number column
The registration number of the graphic symbol should be filled in this column. The registration procedures and requirements for graphic symbols shall be implemented in accordance with relevant regulations. 8 Layout format
The layout format and format requirements of the symbol standard shall comply with the provisions of Chapters 7 and 8 of GB/T1.1-2000. 6
Appendix A
(Informative Appendix)
Symbols and related national standards
GB/T1252 Graphic symbols Arrows and their application (neqISO4196)GB2893 Safety colors
GB2894 Safety signs (neqISO3864)
GB3101 General principles for quantities, units and symbols (eqvISO31-0)GB3102 (all parts) Quantities and units LeqvISO31 (all parts)GB/T4728 (all parts) Graphic symbols for electrical schematics (idtIEC60617) GB/T5465.1 Principles for drawing graphic symbols for electrical equipment (eqVIEC60416) GB/T5465.2 Graphic symbols for electrical equipment (idtIEC60417) GB/T10001 (all parts) Graphic symbols for public information for signs (neqISO7001) GB/T12103 Development and testing procedures for graphic symbols for signs (neqISO9186) GB/T14543 Visual design principles for graphic symbols for signs GB/T15565 Terminology of graphic symbols
GB/T16273 (all parts) Graphic symbols for equipment (neqISO7 000）GB/T16900 Graphical Symbol Representation Rules General Principles (eqVISO/IEC11714-1) GB/T20001.2—2001
GB/T16901.1 Graphical Symbol Representation Rules Graphical Symbols for Technical Documents Part 1: Basic Rules (eqVISO/IEC11714-1)
GB/T16901.2
2 Graphical Symbol Representation Rules Graphical Symbols for Product Technical Documents Part 2: Computer Electronic File Format Specifications for Graphical Symbols (including graphic symbols in the reference symbol library) and their exchange requirements (eqvIEC8171 4-2) GB/T16902.1 Rules for the representation of graphic symbols Graphical symbols for equipment Part 1: Formation of graphic symbols (eqvISO3461-1)
GB/T16903 (all parts)
Rules for the representation of graphic symbols Graphical symbols for signs 7
GB/T20001.2—2001
Appendix B
(Informative Appendix)
Example of the arrangement of symbol (sign) standards
Table B.1 Table B.7 gives an example of the arrangement of the symbol and sign table, and Figure B.1 gives the arrangement of the standard of graphic symbols for equipment used to display the original image.
Note: The registration number column in the table can be omitted before registration is started. Table B.1 Arrangement of the table of graphic symbols for technical documents Number
Graphic symbol
Smoking detector (point type)
Gas detector (point type)
Telephone
Heat detector (linear type)
Alarm generator
Alarm sounder
Manual control of a natural venting device
Control and display equipment with audio and video signals
Control and display equipment with audio and video signals indicating equipment with audible and illuminated signals
ISO6790(5.11)
Symbol for alarm-activated equipment
ISO6790(5.12)
Symbol for alarm-activated equipment
ISO6790(5.14)
Symbol for alarm-activated equipment
ISO6790(5.15 )
Symbol for alarm initiating device
ISO6790(5.16)
Symbol for fire alarm device
ISO6790(5.17)
Symbol for fire vent
ISO6790(5.18)
Symbol for control and indicating device
Registration number
2 Arrangement of the table of graphic symbols for equipment
Graphic symbols
Chain drive
Chain drive
Conveyor belt
Conveyor belt
Coupling
Coupling
Agitator
Agitator,general
Ventilator
ventilator (general)
GB/T20001.2—2001
ISO7000(0014)
ISO7000（0229）
ISO7000（0016）
ISO7000(0015）
ISO7000(0131)
ISO7000（1118）
Registration No.
GB/T20001.2—2001
Indicates any cam-operated function.
Registration No.: ×××××
Automatic control (closed loop)
Automatic cuntrol(clase lonp) Indicates any automatic closed-loop control function.
Registration No.: ××××××
Tighten; light tighten
Lock or tighten
Indicates the function of locking or tightening two machine parts, or indicates that a machine part is positioned in a fixed position. Company registration
Arrangement diagram B.1 of the standard for graphic symbols for equipment showing the original image
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