HG 20559.1-1993 Provisions on the content and depth of piping instrument flow chart design
Some standard content:
Industry Standard of the People's Republic of China
Design Regulations for Pipeline Instrument Flowchart
HG20559-93
Process System Design Technology Center of the Ministry of Chemical Industry Editor:
Approval Department: Chemical
Implementation Date:
November 1, 1994
Engineering Construction Standard Editing Center of the Ministry of Chemical Industry
1994 Beijing
Design Content and Depth Regulations for Pipeline Instrument Flowchart
HG 20559.1-93
Process System Design Technology Center of the Ministry of Chemical Industry Compiled by:
Approved by: Chemical Industry
Implementation date: November 1, 1994 1.0.1
Pipeline Instrument Flowchart (PI Diagram)
Pipeline Instrument Flowchart is carried out on the basis of process design. It is an important work link of engineering design and the main basis for the work of all relevant professionals in engineering design. Pipeline instrument flow chart is to combine all equipment, instruments, pipelines, valves and main pipe fittings required for the establishment of chemical process equipment according to their respective functions to meet process requirements and safety and economic purposes by means of unified graphic symbols and text codes, so as to describe the structure and function of the process equipment. It is not only the basis for design and construction, but also a part of the complete technical data required for enterprise management, trial operation, operation, maintenance and start-up and shutdown. Pipeline instrument flow chart helps to simplify the information exchange between the various departments responsible for the development, engineering design, construction, operation and maintenance of the process equipment. The pipeline instrument flow chart drawn according to this regulation is suitable for chemical, petrochemical, pharmaceutical and other industries. 1.0.2 The pipeline instrument flow chart is gradually deepened and improved during the design process, and it is published in stages and editions. This regulation describes the drawing and representation methods of various PI diagrams of a factory and the depth of each edition of the diagram. 1.0.3 Standard process system professional drawing templates should be used to draw PI diagrams. If conditions permit, the use of computer-aided design systems (CAD) for design work should be actively promoted. When CAD is used to design pipeline instrument flow charts, this regulation should be met.
1.0.4 Classification of pipeline instrument flow charts
1.0.4.1 Pipeline instrument flow charts are usually divided into two categories according to the material categories in the pipeline: process pipeline instrument flow charts (referred to as process PI charts) and auxiliary material and public material pipeline instrument flow charts (referred to as public material system flow charts).
A factory is composed of several process devices and public system devices. In order to make the drawings clearer and more complete, the piping and instrumentation flow chart classified by material category can be further divided into piping and instrumentation flow charts within the device and between devices, as shown below:
Piping and instrumentation flow chart
(collectively referred to as PI diagram)
Process piping and instrumentation flow chart
(referred to as process PI diagram)
Piping and instrument
flowdiagram(P&ID)
Auxiliary materials, common materials
Piping and instrumentation flow chart (referred to as common materials system flow)
Utilityflowdiagram
[Process piping and instrumentation flow chart within the device
Process piping and instrumentation flow chart between devices
Auxiliary materials and common materials pipeline and instrumentation flow chart within the device (referred to as common materials occurrence diagram within the device)
Auxiliary materials and common materials pipeline and instrumentation flow chart within the device Distribution diagram (referred to as the distribution diagram of public materials within the device)
Auxiliary materials and public materials pipeline instrument flow chart between devices (referred to as the public material system flow chart between devices)
1.0.4.3 This regulation lists the representation methods and contents of various PI diagrams according to the classification in 1.0.4.2. A factory is composed of multiple chemical and public engineering devices, and each device is composed of several (at least one) processes (i.e. main items, work numbers, and workshops). The drawing of the PI diagram is based on the process (main item) as the basic unit. As long as the drawings are expressed clearly and completely, other professionals can clearly understand the design intent. If the drawings and design requirements are met, the classification of PI diagrams can be simplified, and the classified PI diagrams in 1.0.4.2 can be combined and expressed together. The regulations for the combined drawing of PI diagrams are described in Chapters 6, 7, 8 and 9 respectively. 1.0.4.4 The drawing methods and contents of the piping and instrumentation flow charts for the auxiliary materials and common material system processes separately set up in the process equipment, as well as the various processes in the auxiliary systems and public engineering system equipment of the entire plant, can refer to the provisions of Chapters 6 and 7.
1.0.5 Design stages and editions of piping and instrumentation flow charts Engineering design is divided into two stages: basic engineering design and detailed engineering design. The edition of the drawing is indicated in each The degree of content expression on the drawings during the engineering design phase. Usually, four versions of PI drawings are completed during the basic engineering design phase: version A PI drawings (preliminary version), version B PI drawings (internal review version), version C PI drawings (user version), and version D PI drawings (confirmation version). Three versions are completed during the detailed engineering design phase: version E PI drawings (detailed version 1), version F PI drawings (detailed version 2), and version G PI drawings (construction version). 1.0.6 The PI drawing representation methods and contents described in the following chapters of this regulation are the most basic and typical. The PI drawing designer should express the design intent and design requirements clearly and completely on the drawing, and the representation method of the drawings may not be limited to this regulation.
In actual engineering, the design manager and the technical department shall determine the number of drawings to be produced at each design stage, as well as the content, depth, and production time of each drawing based on the complexity and difficulty of the engineering project. For the engineering design of large and medium-sized projects, the drawings shall be produced according to the design stage depth of the above seven versions; for mature engineering projects with design experience, the number of versions may be reduced according to actual conditions. However, the stage depth of the intermediate design product (user version) and the design product (construction version) cannot be changed.
1.0.7 Drawing numbering
1.0.7.1 The process piping and instrumentation flow chart within the device, the common material generation diagram within the device, and the common material distribution diagram within the device are usually numbered together. The process piping and instrumentation flow chart between devices and the auxiliary materials and common materials piping and instrumentation flow charts between devices are numbered together. 1.0.7.2 In the title bar of the drawing name, it should be stated which type of piping and instrumentation flow chart it belongs to in 1.0.4.2, and the names of the process materials, auxiliary materials, and common materials media categories should be indicated. The three words "within the device" in the PI diagram within the device can be omitted when marking.
1.0.7.3 The drawing numbering method shall be in accordance with the "Technical Document Numbering Regulations" formulated by this design unit. 1.0.7.4 Sequence of drawing numbers
Flowchart of piping and instrumentation within the device
Home page Figure 1 Flowchart of process piping and instrumentation 1 Flowchart of piping and instrumentation for auxiliary materials and common materials 1 Distribution diagram of piping and instrumentation for auxiliary materials and common materials 1 Flowchart of process piping and instrumentation between processes within the device (if necessary) 1 Flowchart of piping and instrumentation between processes within the device (if necessary). Flowchart of piping and instrumentation between devices
Home page Figure 1 Flowchart of process piping and instrumentation 1 Flowchart of piping and instrumentation for auxiliary materials and common materials. 1.0.8 Modification
1.0.8.1 Before the finished detailed engineering design (G version PI diagram) is archived and stored, each version is allowed to be modified. Designers should modify and discover problems in a timely manner, or they can collect many problems found within the time range of a certain version and modify them all at once.
1.0.8.2D version (confirmed version) is the agreement confirmed by the user and the design unit. In principle, no major changes are allowed in the future PI drawings. Therefore, starting from the detailed engineering design, that is, from the E version of the PI drawing, no complete set of PI modification drawings will be issued. If there is a modification, the modification range will be circled with a pencil on the reverse side of the base drawing, and the modification symbol will be noted. For example, △ indicates the second modification. When the next modification drawing is issued, the modification symbols and modification range lines that have been notified to the relevant professionals before should be cancelled. If the modification content needs to be explained, it can be explained in the remarks column on the drawing. The number of modifications is counted in sequence and recorded in the modification record table next to the PI drawing title bar. 1.0.8.3
For example, if the E version is modified twice, the modifications on the F version of the PI drawing should be counted from the third modification. 351
The recommended modification record table format is shown in Table 1.0.8.3. Sign your name and date in the responsibility column of the modification record table.
Each design unit can refer to this format and content to develop a modification record table applicable to the unit. Table 1.0.8.3
Professional responsibilities and drawing distribution of pipeline instrument flow charts 1.0.9
Pipeline instrument flow charts are mainly drawn by process system professionals, and the main professionals involved in the work are 1.0.9.1
Process, automatic control, machinery, pump, safety, environmental protection, start-up, analysis and testing, pipeline design, pipeline materials. After the basic engineering design begins, the process system professional completes the A version according to the process design, process flow chart and equipment data sheet, as well as the documents published by the relevant professions, as the basis for the basic engineering design of each profession. Both A and B versions are drafts, and the C version needs to adjust the drawing, and each item should meet the specified requirements. The preparation of each version in the future will be completed by the process system professionals on the C version base map, and no new version base map will be redrawn. The process system professional is responsible for all PI diagrams, and each profession is primarily responsible for the scope of each profession on the PI diagram. After each version of the drawing is completed, it shall be signed according to the quality assurance review procedure. 1.0.9.2 The auxiliary material and public material pipeline instrument distribution diagram and the process pipeline between devices, as well as the auxiliary material and public material pipeline instrument flow chart, will not start until the process pipeline instrument flow chart in the device and the auxiliary material and public material pipeline instrument flow chart (public material occurrence diagram) in the device A version are completed, and will be published from version B. 1.0.9.3 The PI diagrams completed by the process system professional shall be distributed to the relevant professionals and design managers according to the project design drawing data distribution method.
The design unit provides users with version C (user version) and version G (construction version) drawings, which are used for user 1.0.9.4
review and construction and construction use respectively. Other versions are used internally by the design unit. Version G (construction version) drawings must be archived and stored in the warehouse, and other versions are kept by the unit and cleaned up regularly. 352
2 General design regulations for pipeline instrument flow charts
2.0.1 This chapter is applicable to all types of pipeline instrument flow charts. 2.0.2 Drawing specifications
Drawings should adopt standard specifications and have a unified title bar with the name of the design unit. When cooperating with foreign companies and needing to complete modifications and in-depth designs on the PI diagrams provided by the foreign companies, a title bar with the name of the unit can be stamped next to the title bar of the foreign company's drawings.
Generally, standard size drawings of size 0 (A0) should be used, and standard size drawings of size 1 (A1) can also be used. Only one specification of drawings can be used for the same device, and lengthening or shortening is not allowed (except in special circumstances). 2.0.3 Lines
All lines should be clear, smooth, and uniform, with sufficient spacing between lines. The minimum spacing between parallel lines should not be less than twice the width of the widest line, and should not be less than 1.5mm, preferably 10mm. On the same drawing, the width of the same type of lines should be consistent, and the width of a line should not be less than 0.25mm under any circumstances. The recommended line widths on piping and instrument flow charts are shown in Table 2.0.3. Table 2.0.3
Line width category
Process pipeline instrument
Table flow chart
Auxiliary materials,
Common material pipeline
Instrument flow
Main process material pipeline
, main product pipeline
and equipment position line
Main auxiliary
materials, main
common material
material pipelines and equipment position
2 .0.4 Marking of words and characters
Secondary materials, product pipelines and other auxiliary material pipelines, equipment, machinery graphic symbols, rectangular boxes representing equipment, public engineering stations, etc., pipeline drawing connection marks, pipeline boundary marks
2.0.4.1 Height of words and letters
Thin lines
Other graphics and lines. Such as: graphic symbols such as valves, pipe fittings and instrument graphic symbol lines, only table pipelines, area lines, dimension lines, various marking lines, range lines, lead lines, reference lines, table lines, dividing lines, insulation, insulation layer lines, accompanying pipes, jacketed pipelines, special parts number boxes and other auxiliary lines
The various text fonts on the drawings should be symmetrical and neat, and engineering characters should be used as much as possible. There should be appropriate space between words or letters to make them clearly visible. The height of Chinese characters should not be less than 2.5mm (2.5 font size). The height of Chinese characters in standard size drawings of size 0 (A0) and size 1 (A1) should be greater than 5mm. The numbers of exponents, fractions, and footnotes are generally in small fonts. The minimum height of fraction numbers is 3mm, and there should be at least 1.5mm of space between the fraction lines. The recommended fonts are applicable to the following objects: (1) 7-point and 5-point fonts are used for equipment names, remarks columns, and the first characters of detailed drawings; (2) 5-point and 3.5-point fonts are used for text annotations, instructions, and notes of other specific design contents; (3) The size of words, letters, and numbers should be the same in the same type of annotations. 2.0.4.2 Annotation methods (1) Equipment and machinery For the annotation methods of equipment and machinery position numbers and technical characteristic data, see 4.0.2.3(5). (2) Pipeline
Horizontal pipeline markings should be written above the pipeline, and vertical pipeline markings should be written parallel to the left. In the case of individual pipelines that are too short to be written, lead lines can be used to draw them out (preferably parallel to the pipeline line). The nominal diameter of the pipeline is expressed in DN. For example: DN25 represents a pipeline with a nominal diameter of 25mm. The diameter of the British standard water and gas pipe welded steel pipe is also expressed in nominal diameter. For example, 2\ pipe is expressed as DN50, and no unit is indicated. (3) Valves and pipe fittings
If marking is required, the marking of valves and pipe fittings should be written near the graphic symbol and parallel to the flow direction. ) Fill in the size to indicate. For example, (25) indicates a valve with a nominal diameter of 25 mm. The nominal diameter of valves and pipe fittings is represented by (
, and no unit is indicated. For the marking method of sampling points for special pipes (valves), please refer to 4.0.2.4 (16) and (21).
(4) Instrument functional components
shall be in accordance with the regulations of the automatic control profession.
(5) Public engineering station
The marking method of public engineering stations shall be in accordance with 7.0.2.3. 2.0.4.3 Types of words and letters
The words shall be in Chinese (except for the specified abbreviations and projects in cooperation with foreign countries). English letters shall be in uppercase (except for letters used in unit system, instrument symbols, footers and indexes). 2.0.5 Dimension marking
Equipment, If there are dimensional requirements for machinery, pipelines, valves, pipe fittings and instruments in the design (such as installation height, position difference, limit size, etc.), the dimensions and (or) elevations should be marked on the PI drawing. The dimensions are usually measured in millimeters, and the elevations should be converted into relative elevations, that is, the ground elevation is used as the reference elevation (expressed as EL100.000), and no units are noted. The meaning of the dimensional requirements should be clear and written in words (or abbreviated English letters) on the drawing, or it can be expressed in the remarks column with annotations. An example of marking method: "Minimum (English letters MIN can be used) ××××" means the proposed minimum size is ××××mm, and the actual size is allowed to exceed during in-depth design. 354
"Maximum (English letters MAX can be used) ××××" means the proposed maximum size is ×× ×Xmm, the actual size is not allowed to be exceeded during detailed design. "As short as possible" means that when detailed design is required (such as when drawing pipeline design drawings), the pipeline length should be as short as possible in the pipeline layout. It is represented by the English letters MIN, without any size at the end, as shown in Figure 4.0.2-15. Flow direction
The material flow arrow indicates the flow direction of the logistics pipeline between the various equipment in this drawing. The cross-connection arrow symbols of the drawing connection and entry and exit boundaries indicate the entry and exit of the logistics pipeline on this drawing (see 4.0.2.4 (4) and (5) for sign symbols). If a drawing is composed of several drawings, it is recommended to use the same drawing method to indicate the entry and exit of the logistics pipeline so that when these drawings are connected, the pipeline lines are at the same level, which helps to read the drawings. 2.0.7 Pipelines Crossing and connection
There are two ways to express the crossing (not connected) and connection of pipes, as shown below. 2.0.7.1 The first expression method is shown in Figures 2.0.7.1-1 to 2.0.7.1-2. Figure 2.0.7.11
Crossing of pipes (not connected)
Figure 2.0.7.1-2 Pipes connected
The second expression method is shown in Figures 2.0.7.2-1 to 2.0.7.2-2. 2.0.7.2
Figure 2.0.7.2-1
Crossing of pipes (not connected)
Figure 2.0.7.2-2 Pipes connected
Only one expression method can be used on a set of PI diagrams, and two methods cannot be used at the same time. The adopted expression method 2. 0.7.3
is listed on the first page diagram.
2.0.8 General layout of piping instrument flow chart 2.0.8.1 The general layout of piping instrument flow chart should not be too crowded, and a certain amount of space should be left around. The recommended minimum distance from the border line and the general layout are shown in Figure 2.0.8.1. 2.0.8.2 The remarks column, detailed drawings and tables in the figure can be arranged according to the drawing and displayed in the available positions, not limited to the positions shown in Figure 2.0.8.1. bzxZ.net
2.0.8.3 It is recommended that there should be no more than 8 devices on the No. 0 (A0) standard size drawing, and about 5 devices on the No. 1 (A1) standard size drawing. The number of devices on a PI drawing should not be too many. The second equipment number and
Technical characteristic data field writing area
Point pipe drawing
The second equipment number and
Technical characteristic data filling area
Number high pipeline
Small area
Modification record table
General drawing layout of pipeline instrument flow chart 2.0.8.1
Note column area
Table or
Detailed drawing area
Modification record table
Title bar
3 Contents of Pipeline Instrument Flowchart
3.0.1 The following contents are specified for the G version (construction version) PI diagram. 3.0.2 Basic contents of pipeline instrument flow chart3.0.2.1 Use the specified category graphic symbols and text codes to indicate all equipment, machinery and driving machines in the process of each process of the device designed by the PI diagram, including the spare tables and mobile equipment for production that need to be in place Note ①, and number and mark them.
Use the specified graphic symbols and text codes to indicate in detail all the required pipelines, valves, main pipe fittings Note 3.0.2.2
, public engineering stations and insulation, etc., and number and mark them. Note: ① does not indicate on-site performance inspection, pressure resistance, air tightness test, cleaning Temporary equipment and mobile equipment for cleaning, commissioning, overhaul and start-up.
Main pipe fittings refer to pipe fittings other than standard elbows and tees of pipelines and pipes and equipment, machinery flanges, fasteners, valves, pipe②
fittings, instrument connection flanges, connectors, etc., as specified in 4.0.2.4(17). The PI diagram does not indicate on-site performance inspection, pressure resistance and air tightness tests, temporary pipelines, valves and main pipe fittings for cleaning, commissioning, overhaul and start-up.
3.0.2.3 All process analysis sampling points are indicated by specified graphic symbols and text codes, and are numbered and labeled.
3.0.2.4 All instruments with detection, indication and control functions are indicated by specified graphic symbols and text codes, including one Secondary instruments and sensors, and number and mark them. 3.0.2.5 Matters that need to be explained on the PI diagram for safe production, commissioning, start-up and shutdown, and accident handling, including the design requirements and key design dimensions of the process system for pipelines, automatic control and other related disciplines. 3.0.3 Additional contents of the pipeline instrument flow chart Key elevations or relative position differences of equipment, machinery and special operating tables (if necessary). 3.0.3.1
3.0.3.2 Technical characteristic data of equipment, machinery, drive machines, etc. (if necessary), including main specifications, volume, heat load, power, and main structural materials. 3.0.3.3
Indicate the scope of supply (complete sets, matching) and division of labor of design units (if any), notes and necessary detailed drawings.
Home page diagram.
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