Some standard content:
Pipeline layout drawing
HG 20519.11-92
1.0.1 Drawing size
Pipeline layout drawing
HG20519.11-92
1 General provisions
The drawing size of the pipeline layout drawing should be A0 as much as possible, and A1 or A2 can also be used for simpler ones. The drawings of the same area should use the same drawing size. The drawing size should not be lengthened or widened. 1.0.2 Scale
The commonly used scale is 1:30, and 125 or 1:50 can also be used, but the plan drawings of the same area or each layer should use the same scale. 1.0.3 Dimension unit
The elevation and coordinates marked in the pipeline layout drawing are in meters, with three digits after the decimal point, up to millimeters; the remaining dimensions are all in millimeters, with only numbers and no units. The nominal diameter of the pipe is always expressed in millimeters. 1.0.4 The design elevation of the ground is EL100.000m. 1.0.5 Drawing name
The drawing name in the title bar is generally written in two lines, with "Pipeline Layout" written on the upper line and "\EL×××.××× Plane" or "\AA, BB...View, etc." written on the lower line. 1.0.6 Arrows should be drawn at the beginning and end of the dimension line (arrows or bars). Dimensions that are not drawn to scale should be marked with a horizontal line below them (except for axonometric drawings).
1.0.7 Dimensions are generally written in the middle above the dimension line and parallel to the dimension line. Design regulations to be followed
For the width of the drawing lines and the font regulations, see HG20519.28-92. 2.0.1
2.0.2 Commonly used abbreviations for pipelines are shown in HG20519.27-92. For the legends of pipes, pipe fittings, valves and special pipe parts on the piping layout, see HG20519.33-92. 2.0.3+
For the legends used on the equipment and piping layout, see HG20519.34-92. 2.0.4
For the partition index diagram, see HG20519.6-92.
3 Drawing representation and dimensioning
3.0.1 The piping layout diagram shall be drawn according to the area divided by the equipment layout diagram or the partition index diagram (with the small area as the basic unit). The regional boundary line is represented by a thick double-dotted line, and the code, coordinates and the piping layout drawing number of the adjacent part with the same height as the diagram are marked on the outside of the regional boundary line, as shown in the figure below. BL×××. ×××N
AXXX'XXXTH
M.LXXX.XXXN
COD××××
3X××*×××TW
X xxa00
Note: BL——indicates the device boundary, ML indicates the connection line; COD——indicates the connection diagram, each diagram
3.0.2 Pipeline layout drawings generally only draw plan views. When the local representation in the plan view is not clear enough, a sectional view or an axonometric view can be drawn. The sectional view or axonometric view can be drawn in the blank space outside the boundary line of the pipeline plan layout (it is not allowed to draw a small sectional view or axonometric view in the blank space within the pipeline plan layout), or drawn on a separate drawing. When drawing a partial view, it must be drawn in proportion and the dimensions can be marked as needed. The axonometric view may not be in proportion, but the dimensions should be marked. The sectional view symbol is specified to be represented by capital English letters such as AA and BB, and the symbols shall not be repeated in the same area. The cutting position, direction and number of the section to be cut should be indicated on the plan.
3.0.3 For multi-story buildings and structures, the pipeline plan layout should be drawn by level. If several layers of plan are drawn on one drawing, they should be arranged from the lowest level to the top or from left to right on the drawing, and "EL100.000 Plan" or "EL×××.××× Plan" should be indicated under each plan. 3.0.4 In the upper right corner of the drawing with the plan, on the left side of the pipe opening table, a direction mark consistent with the design north direction of the equipment layout drawing should be drawn.
3.0.5 Contents of buildings (structures) on the pipeline layout drawing: 3.0.5.1 Buildings and structures should be drawn in proportion, with columns, beams, floor slabs, doors, windows, stairs, operating tables, installation holes, pipe trenches, grate plates, water spill slopes, pipe gallery racks, cofferdams, passages, etc. 3.0.5.2 Mark the axis number of buildings and structures and the dimensions between the axis. 3.0.5.3 Mark the elevation of the ground, floor, platform, crane, and beam top. 3.0.5.4 Use thin solid lines to mark the width and direction of cable trays, cable trenches, instrument cable boxes, and racks in proportion, and mark the bottom elevation.
3.0.5.5 The composition and name of living rooms and auxiliary rooms should be marked. 3.0.6 Contents of equipment to be indicated on the piping layout diagram: 3.0.6.1 Use thin solid lines to draw the simplified shape and foundation, platform, ladder (including the safety guard of the ladder) of the equipment in proportion to the position determined by the equipment layout diagram. 3.0.6.2 Mark the equipment position number consistent with the flow chart above the equipment center line on the piping layout diagram, and mark the elevation of the support point (such as POSEL×××.×××) or the elevation of the main axis center line (such as EL×××.×××) below. The equipment position number on the partial view is marked on the near side of the equipment or inside the equipment. 3.0.6.3 Mark the positioning dimensions of the equipment according to the equipment layout diagram. 3.0.6.4, use 5mm×5mm squares to mark the symbols of the equipment pipe openings (including instrument interfaces and spare interfaces that need to be indicated) and the distance from the center of the equipment to the end face of the pipe opening with the pipe opening positioning dimensions (if marked on the pipe opening table according to 3.0.8.4, it is not necessary to mark on the drawing). As shown in the following figure: Top bottom
3.0.6.5 Mark the pipe opening positioning dimensions (or angles) of pumps, compressors, turbines and other mechanical equipment according to the product samples or drawings provided by the manufacturer, and give the pipe opening symbols. 3.0.6.6 Draw the support base of the horizontal equipment in proportion and mark the position of the fixed support. If there is a concrete foundation under the support, the size of the foundation should be drawn in proportion without marking the size. 3.0.6.7 For vertical containers, the position and marking symbols of the skirt manhole should also be indicated. 3.0.6.8 For industrial furnaces, all columns related to the furnace platform, the furnace shell and the shape of the main pipe header, the air duct, the flue, etc., should be indicated.
3.0.7 Contents of the pipelines to be indicated on the pipeline layout diagram: 3.0.7.1 In the pipeline layout diagram, the pipelines with a nominal diameter (DN) greater than or equal to 400mm or 16 inches are indicated by double lines, and the pipelines with a nominal diameter (DN) less than or equal to 350mm or 14 inches are indicated by a single line. If there are not many large-diameter pipelines in the pipeline layout diagram, the pipelines with a nominal diameter (DN) greater than or equal to 250mm or 10 inches are indicated by double lines; those with a nominal diameter (DN) less than or equal to 200mm or 8 inches are indicated by a single line.
3.0.7.2 Draw arrows at appropriate locations to indicate the direction of material flow (the double-line pipeline arrows are drawn on the center line). 3.0.7.3 Draw the pipeline and the valves, pipe fittings (including elbows, tees, flanges, reducers, hose joints and other pipe connectors), pipe accessories, special pipe fittings, etc. on the pipeline in proportion. 3.0.7.4 The connection types of various pipe fittings are shown in the figure below: The position of the welding point should be drawn in proportion to the length of the pipe fitting, and the length of the pipe fitting combination should be considered when marking the size.
Elbows with a nominal pipe diameter less than or equal to 50mm or 2 inches shall be represented by right angles. Connection type: threaded or socket welded fittings
Butt welded fittings:
3.0.7.5 The insulation and cold insulation codes shall be added after the pipeline grade. 3.0.7.6 The detection elements of the pipeline (pressure, temperature, flow, liquid level, analysis, material level, sampling, temperature measurement point, pressure measurement point, etc.) shall be represented by a 10mm circle on the pipeline layout plan, and the symbols and numbers of the detection elements in the PID diagram shall be filled in the circle. The plane position of the detection element is connected with a thin solid line and a circle (the specific position is negotiated by the pipeline and automatic control professionals). 3.0.7.7 The outer contour and location of the local instrument panel and electrical panel are indicated by thin dotted lines in proportion, but the size does not need to be noted to avoid collision with the pipeline.
3.0.7.8 When the pipeline layout of several sets of equipment is exactly the same, it is allowed to draw the pipeline of only one set of equipment, and the rest can be simplified as a box, but the joint position of each branch pipe should be drawn on the main pipe. 3.0.7.9 The size of the gasket between the flanges is not marked, but this part of the size must be included in the total size of the pipeline.
3.0.7.10 The "hoisting area" or "maintenance area" of heavy or oversized equipment and the reserved space for core extraction of heat exchangers are indicated in proportion on the pipeline layout drawing with double dotted lines, but the size is not marked, as shown in the following figure: Maintenance area
3.0.7.11 When the pipeline on the tower passes from one plane to another, the number of this pipeline should be marked. If the size or position of the pipeline changes, or if branches or accessories appear, the pipeline number should also be marked. 3.0.7.12 For pipe fittings and valves that are special parts on the PID diagram, such as mufflers, burst panels, eye washers, analytical equipment, etc., appropriate simplification is allowed in the pipeline layout diagram, that is, a rectangular (or circular) thin line is used to indicate the position of the local part, and the label or special part number is indicated. It can also be done according to 3.0.7.15, see the detailed drawing. 3.0.7.13 The analysis and sampling interface should be drawn to the root valve and marked with symbols, such as: zone
3.0.7.14 The representation of venting and drainage: DN15
A rectangular box with a size of 18×5mnm
3.0.7.15 When some pipelines in the pipeline layout diagram are unclear, it is allowed to enlarge the axonometric diagram of the blank space around the drawing to indicate one or several pipelines, so there is no need to draw the elevation drawing. It is also allowed to draw a partially enlarged axonometric drawing on another drawing. Examples of annotation symbols used in piping layout drawings are as follows;
→"10\ indicates the detailed drawing number
→"34"—indicates the suffix number of the piping layout drawing "E3"—indicates the grid number of the piping layout drawing. When drawing an axonometric drawing in the blank space of this drawing, the representation method is: 10
The box size is 12mm×15mm
The character height is 3mm
The detailed drawing number and the corresponding suffix number and grid number of the piping layout drawing should be indicated below the enlarged axonometric drawing to facilitate the location, i.e.
\10\(34-E3）
3.0.7.16 According to PID, mark the medium code, pipeline number, nominal diameter, pipeline grade and insulation type on the top of the pipeline (above the center line for double-line pipelines), and mark the pipeline elevation on the bottom (when the elevation is based on the pipeline center line, only the number needs to be marked, such as EL×××.×××; when it is based on the bottom of the pipe, add the bottom code of the pipe before the number, such as BOPEL××××X×), such as:
SL1305-100-B1A(H)
ELX xx. x xX
SL1305-100-B1A(H)
BOPELX × X. XXX
3.0.7.17 All pipelines should be equipped with vents at high points and drains at low points. For the venting of liquid pipelines, the drain should be equipped with valves and threaded pipe caps, and the drain of gas pipelines should also be equipped with valves and threaded pipe caps. The venting pipeline used for pressure testing is only equipped with screw caps.
The size of the drain valve should generally not be less than the following sizes: for pipes with a nominal diameter of DN≤40mm, the valve size is 15mm; for pipes with a nominal diameter of DN≥50mm, the valve size is 20mm; for pipes with a nominal diameter of DN≥250mm, the valve size is 25mm. Note: For the venting of flammable, explosive, and encapsulated gases, treatment measures must be taken before venting. 3.0.7.18 According to PID The given symbols are used to mark the liquid level gauge, liquid level alarm, venting, draining, sampling points, temperature measuring points, pressure measuring points, etc. on the container. If any of these items has pipes and valves, they should also be drawn, and the dimensions do not need to be marked. 3.0.7.19 Dimension marking on the pipeline layout plan: (1) The pipeline positioning dimensions are marked based on the axis of the building or structure, the center line of the equipment, the center line of the equipment pipe mouth, the boundary line of this domain (or the boundary line of the connection diagram), etc. The pipeline positioning dimensions can also be expressed in coordinate form. (2) For reducers, the nominal diameters of the front and rear end pipes should be marked, such as: DN80/50 or 80×50. (3) For pipelines that are required to have a slope, the slope should be marked (the code is i and the slope direction, such as: 51
WP ELX×XX××
WPEL working point elevation
(4) For non-90° elbows and non-90° branch connections, the angles should be marked. WP EL××X.XXX
(5) On the pipeline layout plan, the length of the pipe section is not marked. Only the center positioning dimensions of components such as pipes, pipe fittings, valves, filters, flow restriction orifices, etc. are marked or positioned by the flange surface at one end. (6) When the direction of the pipeline changes in an area, the location dimensions of the branch pipe and the pipe fittings on the pipeline should be marked according to the center line of the container, equipment nozzle or adjacent pipeline. When a pipeline crosses the area through a connecting line to another pipeline layout plan, it is also necessary to locate from the connecting line for the sake of continuity. Only in this case will the dimensions be repeated. (7) Mark the symbols and positioning dimensions of instrument control points. When safety valves, steam traps, analytical sampling points, and special pipe fittings are marked, their symbols should be marked within a 10 mm circle. (8) In order to avoid reducing the written size when marking pipe numbers and elevations between pipes with small intervals, it is allowed to mark the elevation and pipe number with an additional line. This line passes through each pipe and points to the marked pipe. (9) The reducer on the water pipe is positioned by the large end, and the threaded pipe fittings or socket welding pipe fittings are positioned by one end. (10) Draw manholes, floor openings, and hanging columns in proportion (where the length of the hanging column is indicated by a thin solid double line, and the range of movement of the hanging column is indicated by a dotted line), and there is no need to mark the positioning dimensions. (11) When the pipeline is inclined, the working point elevation (WPEL) should be marked, and the dimension line should point to the place where positioning can be carried out.
(12) For offset pipes and branches with angles, the linear dimensions are marked in the horizontal direction, and the angle dimensions are not marked. 3.0.8 Pipe opening table
The pipe opening table is in the upper right corner of the piping layout drawing. Fill in the equipment pipe openings in the piping layout drawing. The format of the pipe opening table is as follows:52
(MPa）
GB9115
GB9115
GB9115
GB9115
GB9115
GB9115
The pipe opening symbol should be consistent with that marked on the equipment in this layout drawing. The sealing surface type is the same as the gasket sealing code. See HG20519.40-92. The year number can be omitted in the flange standard number.
E(W) Sleeping vertical angle horizontal angle
The length is generally the distance from the center of the equipment to the end face of the pipe opening, such as "L" in the following figures, marked according to the equipment diagram. Vertical equipment top view
Horizontal equipment side view
Note: The "L" value in brackets should be marked in the drawing, and the word "see figure" should be filled in the table. Vertical equipment main view
3.0.8.5 Orientation: The horizontal angle of the pipe mouth is marked according to the direction mark; the vertical angle of the pipe mouth is 180° at most, 0° upward, 180° downward, and 90° for the horizontal pipe mouth. For pipe mouths with special orientations that cannot be represented in the pipe mouth table, it is allowed to be marked on the drawing, and the word "see figure" should be filled in the table.
Whenever the orientation of the pipe mouth can be indicated in the pipe mouth table, the orientation of the pipe mouth may not be marked on the plan view. 3.0.8.6 Coordinates: The coordinates of each pipe mouth refer to the coordinates of the end face of the pipe mouth, and are marked according to the reference point of the drawing. The coordinates can be in the E, N direction, or the W, N direction, and should be consistent with the coordinates of the pipeline layout drawing. The unit is meter. 3.0.9 Pipe rack numbering and representation
3.0.9.1 For pipe rack numbering and representation, see HG20519.29-923.0.9.2 Pipe rack positioning
For horizontal pipe supports, the positioning dimensions shall be marked, and for vertical pipe supports, the elevation of the support top surface or the supporting surface (such as the platform surface, floor surface, beam top surface) shall be marked. 53
3.0.9.3 In the pipeline layout drawing, each pipe rack shall be assigned an independent pipe rack number. 3.0.10 When there is a change in the pipeline material (i.e., a change in grade), it shall be marked in the drawing according to the PID. 3.0.11 Above the title bar of each pipeline layout drawing, a reduced and shaded index diagram shall be used to indicate the location diagram of the device area where the drawing is located.
See example picture
EL 00. 00
EL99850
Elme25e
REX561
L1235-5
Eto2900||tt ||T1510-58
Pos.ELroo.too
fosELroo.250
Pl3e28
AsELI915 When some pipes in the pipeline layout are unclear, it is allowed to partially enlarge the axonometric drawing in the empty space around the drawing to indicate one or several pipes, so there is no need to draw the elevation drawing. The partially enlarged axonometric drawing is also allowed to be drawn on another drawing. Examples of annotation symbols used in pipeline layout drawings are as follows;
→"10\ indicates the detailed drawing number
→"34"-indicates the suffix number of the pipeline layout drawing "E3"--indicates the grid number of the pipeline layout drawing. When drawing an axonometric drawing in the empty space of this drawing, the representation method is: 10
The box size is 12mm×15mm
The character height is 3mm
The detailed drawing number and the corresponding suffix number and grid number of the pipeline layout drawing should be indicated below the enlarged axonometric drawing to facilitate the location, that is,
\10\(34-E3）
3.0.7.16 According to PID, mark the medium code, pipeline number, nominal diameter, pipeline grade and insulation type on the top of the pipeline (above the center line for double-line pipelines), and mark the pipeline elevation on the bottom (when the elevation is based on the pipeline center line, only the number needs to be marked, such as EL×××.×××; when it is based on the bottom of the pipe, add the bottom code of the pipe before the number, such as BOPEL××××X×), such as:
SL1305-100-B1A(H)
ELX xx. x xX
SL1305-100-B1A(H)
BOPELX × X. XXX
3.0.7.17 All pipelines should be equipped with vents at high points and drains at low points. For the venting of liquid pipelines, the drain should be equipped with valves and threaded pipe caps, and the drain of gas pipelines should also be equipped with valves and threaded pipe caps. The venting pipeline used for pressure testing is only equipped with screw caps.
The size of the drain valve should generally not be less than the following sizes: for pipes with a nominal diameter of DN≤40mm, the valve size is 15mm; for pipes with a nominal diameter of DN≥50mm, the valve size is 20mm; for pipes with a nominal diameter of DN≥250mm, the valve size is 25mm. Note: For the venting of flammable, explosive, and encapsulated gases, treatment measures must be taken before venting. 3.0.7.18 According to PID The given symbols are used to mark the liquid level gauge, liquid level alarm, venting, draining, sampling points, temperature measuring points, pressure measuring points, etc. on the container. If any of these items has pipes and valves, they should also be drawn, and the dimensions do not need to be marked. 3.0.7.19 Dimension marking on the pipeline layout plan: (1) The pipeline positioning dimensions are marked based on the axis of the building or structure, the center line of the equipment, the center line of the equipment pipe mouth, the boundary line of this domain (or the boundary line of the connection diagram), etc. The pipeline positioning dimensions can also be expressed in coordinate form. (2) For reducers, the nominal diameters of the front and rear end pipes should be marked, such as: DN80/50 or 80×50. (3) For pipelines that are required to have a slope, the slope should be marked (the code is i and the slope direction, such as: 51
WP ELX×XX××
WPEL working point elevation
(4) For non-90° elbows and non-90° branch connections, the angles should be marked. WP EL××X.XXX
(5) On the pipeline layout plan, the length of the pipe section is not marked. Only the center positioning dimensions of components such as pipes, pipe fittings, valves, filters, flow restriction orifices, or positioning by one end flange surface are marked. (6) When the direction of the pipeline changes in an area, the location dimensions of the branch pipe and the pipe fittings on the pipeline should be marked according to the center line of the container, equipment nozzle or adjacent pipeline. When a pipeline crosses the area through a connecting line to another pipeline layout plan, it is also necessary to locate from the connecting line for the sake of continuity. Only in this case will the dimensions be repeated. (7) Mark the symbols and positioning dimensions of instrument control points. When safety valves, steam traps, analytical sampling points, and special pipe fittings are marked, their symbols should be marked within a 10 mm circle. (8) In order to avoid reducing the written size when marking pipe numbers and elevations between pipes with small intervals, it is allowed to mark the elevation and pipe number with an additional line. This line passes through each pipe and points to the marked pipe. (9) The reducer on the water pipe is positioned by the large end, and the threaded pipe fittings or socket welding pipe fittings are positioned by one end. (10) Draw manholes, floor openings, and hanging columns in proportion (where the length of the hanging column is indicated by a thin solid double line, and the range of movement of the hanging column is indicated by a dotted line), and there is no need to mark the positioning dimensions. (11) When the pipeline is inclined, the working point elevation (WPEL) should be marked, and the dimension line should point to the place where positioning can be carried out.
(12) For offset pipes and branches with angles, the linear dimensions are marked in the horizontal direction, and the angle dimensions are not marked. 3.0.8 Pipe opening table
The pipe opening table is in the upper right corner of the piping layout drawing. Fill in the equipment pipe openings in the piping layout drawing. The format of the pipe opening table is as follows:52
(MPa）
GB9115
GB9115
GB9115
GB9115
GB9115
GB9115
The pipe opening symbol should be consistent with that marked on the equipment in this layout drawing. The sealing surface type is the same as the gasket sealing code. See HG20519.40-92. The year number can be omitted in the flange standard number.
E(W) Sleeping vertical angle horizontal angle
The length is generally the distance from the center of the equipment to the end face of the pipe opening, such as "L" in the following figures, marked according to the equipment diagram. Vertical equipment top view
Horizontal equipment side view
Note: The "L" value in brackets should be marked in the drawing, and the word "see figure" should be filled in the table. Vertical equipment main view
3.0.8.5 Orientation: The horizontal angle of the pipe mouth is marked according to the direction mark; the vertical angle of the pipe mouth is 180° at most, 0° upward, 180° downward, and 90° for the horizontal pipe mouth. For pipe mouths with special orientations that cannot be represented in the pipe mouth table, it is allowed to be marked on the drawing, and the word "see figure" should be filled in the table.
Whenever the orientation of the pipe mouth can be indicated in the pipe mouth table, the orientation of the pipe mouth may not be marked on the plan view. 3.0.8.6 Coordinates: The coordinates of each pipe mouth refer to the coordinates of the end face of the pipe mouth, and are marked according to the reference point of the drawing. The coordinates can be in the E, N direction, or the W, N direction, and should be consistent with the coordinates of the pipeline layout drawing. The unit is meter. 3.0.9 Pipe rack numbering and representation
3.0.9.1 For pipe rack numbering and representation, see HG20519.29-923.0.9.2 Pipe rack positioning
For horizontal pipe supports, mark the positioning dimensions; for vertical pipe supports, mark the elevation of the support top surface or supporting surface (such as platform surface, floor surface, beam top surface). 53
3.0.9.3 In the pipeline layout drawing, each pipe rack shall be assigned an independent pipe rack number. 3.0.10 When there is a change in the pipeline material (i.e., a change in grade), it shall be marked in the drawing according to the PID. 3.0.11 Above the title bar of each pipeline layout drawing, a reduced and shaded index diagram shall be used to indicate the location diagram of the device area where the drawing is located.
See example picture
EL 00. 00
EL99850
Elme25e
REX561
L1235-5
Eto2900||tt ||T1510-58
Pos.ELroo.too
fosELroo.250
Pl3e28
AsELI915 When some pipes in the pipeline layout are unclear, it is allowed to partially enlarge the axonometric drawing in the empty space around the drawing to indicate one or several pipes, so there is no need to draw the elevation drawing. The partially enlarged axonometric drawing is also allowed to be drawn on another drawing. Examples of annotation symbols used in pipeline layout drawings are as follows;
→"10\ indicates the detailed drawing number
→"34"-indicates the suffix number of the pipeline layout drawing "E3"--indicates the grid number of the pipeline layout drawing. When drawing an axonometric drawing in the empty space of this drawing, the representation method is: 10
The box size is 12mm×15mm
The character height is 3mm
The detailed drawing number and the corresponding suffix number and grid number of the pipeline layout drawing should be indicated below the enlarged axonometric drawing to facilitate the location, that is,
\10\(34-E3）
3.0.7.16 According to PID, mark the medium code, pipeline number, nominal diameter, pipeline grade and insulation type on the top of the pipeline (above the center line for double-line pipelines), and mark the pipeline elevation on the bottom (when the elevation is based on the pipeline center line, only the number needs to be marked, such as EL×××.×××; when it is based on the bottom of the pipe, add the bottom code of the pipe before the number, such as BOPEL××××X×), such as:
SL1305-100-B1A(H)
ELX xx. x xX
SL1305-100-B1A(H)
BOPELX × X. XXX
3.0.7.17 All pipelines should be equipped with vents at high points and drains at low points. For the venting of liquid pipelines, the drain should be equipped with valves and threaded pipe caps, and the drain of gas pipelines should also be equipped with valves and threaded pipe caps. The venting pipeline used for pressure testing is only equipped with screw caps.
The size of the drain valve should generally not be less than the following sizes: for pipes with a nominal diameter of DN≤40mm, the valve size is 15mm; for pipes with a nominal diameter of DN≥50mm, the valve size is 20mm; for pipes with a nominal diameter of DN≥250mm, the valve size is 25mm. Note: For the venting of flammable, explosive, and encapsulated gases, treatment measures must be taken before venting. 3.0.7.18 According to PID The given symbols are used to mark the liquid level gauge, liquid level alarm, venting, draining, sampling points, temperature measuring points, pressure measuring points, etc. on the container. If any of these items has pipes and valves, they should also be drawn, and the dimensions do not need to be marked. 3.0.7.19 Dimension marking on the pipeline layout plan: (1) The pipeline positioning dimensions are marked based on the axis of the building or structure, the center line of the equipment, the center line of the equipment pipe mouth, the boundary line of this domain (or the boundary line of the connection diagram), etc. The pipeline positioning dimensions can also be expressed in coordinate form. (2) For reducers, the nominal diameters of the front and rear end pipes should be marked, such as: DN80/50 or 80×50. (3) For pipelines that are required to have a slope, the slope should be marked (the code is i and the slope direction, such as: 51
WP ELX×XX××
WPEL working point elevation
(4) For non-90° elbows and non-90° branch connections, the angles should be marked. WP EL××X.XXX
(5) On the pipeline layout plan, the length of the pipe section is not marked. Only the center positioning dimensions of components such as pipes, pipe fittings, valves, filters, flow restriction orifices, or positioning by one end flange surface are marked. (6) When the direction of the pipeline changes in an area, the location dimensions of the branch pipe and the pipe fittings on the pipeline should be marked according to the center line of the container, equipment nozzle or adjacent pipeline. When a pipeline crosses the area through a connecting line to another pipeline layout plan, it is also necessary to locate from the connecting line for the sake of continuity. Only in this case will the dimensions be repeated. (7) Mark the symbols and positioning dimensions of instrument control points. When safety valves, steam traps, analytical sampling points, and special pipe fittings are marked, their symbols should be marked within a 10 mm circle. (8) In order to avoid reducing the written size when marking pipe numbers and elevations between pipes with small intervals, it is allowed to mark the elevation and pipe number with an additional line. This line passes through each pipe and points to the marked pipe. (9) The reducer on the water pipe is positioned by the large end, and the threaded pipe fittings or socket welding pipe fittings are positioned by one end. (10) Draw manholes, floor openings, and hanging columns in proportion (where the length of the hanging column is indicated by a thin solid double line, and the range of movement of the hanging column is indicated by a dotted line), and there is no need to mark the positioning dimensions. (11) When the pipeline is inclined, the working point elevation (WPEL) should be marked, and the dimension line should point to the place where positioning can be carried out.
(12) For offset pipes and branches with angles, the linear dimensions are marked in the horizontal direction, and the angle dimensions are not marked. 3.0.8 Pipe opening table
The pipe opening table is in the upper right corner of the piping layout drawing. Fill in the equipment pipe openings in the piping layout drawing. The format of the pipe opening table is as follows:52bzxz.net
(MPa）
GB9115
GB9115
GB9115
GB9115
GB9115
GB9115
The pipe opening symbol should be consistent with that marked on the equipment in this layout drawing. The sealing surface type is the same as the gasket sealing code. See HG20519.40-92. The year number can be omitted in the flange standard number.
E(W) Sleeping vertical angle horizontal angle
The length is generally the distance from the center of the equipment to the end face of the pipe opening, such as "L" in the following figures, marked according to the equipment diagram. Vertical equipment top view
Horizontal equipment side view
Note: The "L" value in brackets should be marked in the drawing, and the word "see figure" should be filled in the table. Vertical equipment main view
3.0.8.5 Orientation: The horizontal angle of the pipe mouth is marked according to the direction mark; the vertical angle of the pipe mouth is 180° at most, 0° upward, 180° downward, and 90° for the horizontal pipe mouth. For pipe mouths with special orientations that cannot be represented in the pipe mouth table, it is allowed to be marked on the drawing, and the word "see figure" should be filled in the table.
Whenever the orientation of the pipe mouth can be indicated in the pipe mouth table, the orientation of the pipe mouth may not be marked on the plan view. 3.0.8.6 Coordinates: The coordinates of each pipe mouth refer to the coordinates of the end face of the pipe mouth, and are marked according to the reference point of the drawing. The coordinates can be in the E, N direction, or the W, N direction, and should be consistent with the coordinates of the pipeline layout drawing. The unit is meter. 3.0.9 Pipe rack numbering and representation
3.0.9.1 For pipe rack numbering and representation, see HG20519.29-923.0.9.2 Pipe rack positioning
For horizontal pipe supports, the positioning dimensions shall be marked, and for vertical pipe supports, the elevation of the support top surface or the supporting surface (such as the platform surface, floor surface, beam top surface) shall be marked. 53
3.0.9.3 In the pipeline layout drawing, each pipe rack shall be assigned an independent pipe rack number. 3.0.10 When there is a change in the pipeline material (i.e., a change in grade), it shall be marked in the drawing according to the PID. 3.0.11 Above the title bar of each pipeline layout drawing, a reduced and shaded index diagram shall be used to indicate the location diagram of the device area where the drawing is located.
See example picture
EL 00. 00
EL99850
Elme25e
REX561
L1235-5
Eto2900||tt ||T1510-58
Pos.ELroo.too
fosELroo.250
Pl3e28
AsELI918 Mark the liquid level gauge, liquid level alarm, vent, drain, sampling point, temperature measurement point, pressure measurement point, etc. on the container according to the symbols given by PID. If any of the items has pipes and valves, they should also be drawn, and the dimensions do not need to be marked. 3.0.7.19 Dimension marking of pipeline layout plan: (1) The pipeline positioning dimensions are marked based on the axis of the building or structure, the center line of the equipment, the center line of the equipment pipe mouth, the boundary line of this area (or the boundary line of the connection diagram), etc. The pipeline positioning dimensions can also be expressed in coordinate form. (2) For reducers, the nominal diameters of the front and rear end pipes should be marked, such as: DN80/50 or 80×50. (3) For pipelines that require a slope, the slope should be marked (the code is i and the slope direction, such as: 51
WP ELX×XX××
WPEL Working point elevation
(4) For non-90° elbows and non-90° branch pipe connections, the angle should be marked. WP EL××X.XXX
(5) On the piping layout plan, the length of the pipe section is not marked. Only the center positioning dimensions of components such as pipes, pipe fittings, valves, filters, flow limiting orifices, or positioning by the flange surface at one end are marked. (6) In an area, when the direction of the pipeline changes, the position dimensions of the branch pipes and the pipe fittings on the pipeline should be marked according to the center line of the container, equipment nozzle or adjacent pipeline. When a pipeline crosses the area through a connecting line to another piping layout plan, it is also necessary to locate it from the connecting line for the sake of continuity. Only in this case will the size be repeated. (7) Mark the symbols and positioning dimensions of instrument control points. For safety valves, steam traps, analytical sampling points, and special pipe fittings, there are When marking, their symbols should be marked within a 10mm circle. (8) In order to avoid reducing the written size when marking the pipe number and elevation between pipes with close spacing, it is allowed to use an additional line to mark the elevation and pipe number. This line passes through each pipe and points to the marked pipe. (9) The reducer on the water pipe is positioned by the large end, and the threaded pipe fittings or socket welding pipe fittings are positioned by one end. (10) Draw manholes, floor openings, and hanging columns in proportion (where a thin solid double line is used to indicate the length of the hanging column, and a dotted line is used to indicate the range of motion of the hanging column). There is no need to mark the positioning dimensions. (11) When the pipeline is inclined, the working point elevation (WPEL) should be marked, and the dimension line should point to the place where positioning can be performed.
(12) Angle offset pipe The linear dimensions of the pipe and branch pipes are marked in the horizontal direction, but the angle dimensions are not marked. 3.0.8 Pipe opening table
The pipe opening table is located in the upper right corner of the piping layout drawing. Fill in the equipment pipe openings in the piping layout drawing. The format of the pipe opening table is as follows: 52
(MPa）
GB9115
GB9115
GB9115
GB9115
GB9115
GB9115
The pipe opening symbol should be consistent with that marked on the equipment in this layout drawing. The sealing surface type is the same as the gasket sealing code. See HG20519.40-92. The year can be omitted in the flange standard number. No.
E(W) Vertical angle Horizontal angle
The length is generally the distance from the center of the equipment to the end face of the nozzle, such as "L" in the following figures, which is marked according to the equipment diagram. Vertical equipment top view
Horizontal equipment side view
Note The "L" value in brackets should be marked in the figure, and the word "see figure" should be filled in the table. Vertical equipment main view
3.0.8.5 Orientation: The horizontal angle of the nozzle is marked according to the direction mark; the vertical angle of the nozzle is a maximum of 180°, 0° upward, 180° downward, and 90° for the horizontal nozzle. For nozzles with special orientations that cannot be shown in the nozzle table, it is allowed to be marked on the drawing, and the word "see figure" should be filled in the table.
Whenever the nozzle orientation can be indicated in the nozzle table, the nozzle orientation may not be marked on the plan view. 3.0.8.6 Coordinates: The coordinates of each pipe opening refer to the coordinates of the end face of the pipe opening, and are marked based on the reference point of the drawing. The coordinates can be in the E and N directions, or in the W and N directions, and should be consistent with the coordinates of the pipeline layout drawing. The unit is in meters. 3.0.9 Pipe rack numbering and representation
3.0.9.1 Pipe rack numbering and representation see HG20519.29-923.0.9.2 Pipe rack positioning
The horizontal pipe bracket is marked with the positioning size, and the vertical pipe bracket is marked with the elevation of the bracket top surface or the supporting surface (such as the platform surface, floor surface, beam top surface). 53
3.0.9.3 In the pipeline layout drawing, each pipe rack is assigned an independent pipe rack number. 3.0.10 When there is a change in the pipeline material (i.e., the grade changes), it should be marked in the drawing according to PID. 3.0.11 Above the title bar of each piping layout drawing, a reduced and shaded index drawing shall be used to indicate the location of the installation area where the drawing is located.
See example drawing
EL 00. 00
EL99850
Elme25e
REX561
L1235-5
Eto2900
T1510-58
Pos.ELroo.too
fosELroo.250
Pl3e28
AsELI918 Mark the liquid level gauge, liquid level alarm, vent, drain, sampling point, temperature measurement point, pressure measurement point, etc. on the container according to the symbols given by PID. If any of the items has pipes and valves, they should also be drawn, and the dimensions do not need to be marked. 3.0.7.19 Dimension marking of pipeline layout plan: (1) The pipeline positioning dimensions are marked based on the axis of the building or structure, the center line of the equipment, the center line of the equipment pipe mouth, the boundary line of this area (or the boundary line of the connection diagram), etc. The pipeline positioning dimensions can also be expressed in coordinate form. (2) For reducers, the nominal diameters of the front and rear end pipes should be marked, such as: DN80/50 or 80×50. (3) For pipelines that require a slope, the slope should be marked (the code is i and the slope direction, such as: 51
WP ELX×XX××
WPEL Working point elevation
(4) For non-90° elbows and non-90° branch pipe connections, the angle should be marked. WP EL××X.XXX
(5) On the piping layout plan, the length of the pipe section is not marked. Only the center positioning dimensions of components such as pipes, pipe fittings, valves, filters, flow limiting orifices, or positioning by the flange surface at one end are marked. (6) In an area, when the direction of the pipeline changes, the position dimensions of the branch pipes and the pipe fittings on the pipeline should be marked according to the center line of the container, equipment nozzle or adjacent pipeline. When a pipeline crosses the area through a connecting line to another piping layout plan, it is also necessary to locate it from the connecting line for the sake of continuity. Only in this case will the size be repeated. (7) Mark the symbols and positioning dimensions of instrument control points. For safety valves, steam traps, analytical sampling points, and special pipe fittings, there are When marking, their symbols should be marked within a 10mm circle. (8) In order to avoid reducing the written size when marking the pipe number and elevation between pipes with close spacing, it is allowed to use an additional line to mark the elevation and pipe number. This line passes through each pipe and points to the marked pipe. (9) The reducer on the water pipe is positioned by the large end, and the threaded pipe fittings or socket welding pipe fittings are positioned by one end. (10) Draw manholes, floor openings, and hanging columns in proportion (where a thin solid double line is used to indicate the length of the hanging column, and a dotted line is used to indicate the range of motion of the hanging column). There is no need to mark the positioning dimensions. (11) When the pipeline is inclined, the working point elevation (WPEL) should be marked, and the dimension line should point to the place where positioning can be performed.
(12) Angle offset pipe The linear dimensions of the pipe and branch pipes are marked in the horizontal direction, but the angle dimensions are not marked. 3.0.8 Pipe mouth table
The pipe mouth table is in the upper right corner of the piping layout drawing, and the equipment pipe mouths in the piping layout drawing are filled in. The format of the pipe mouth table is as follows: 52
(MPa）
GB9115
GB9115
GB9115
GB9115
GB9115
GB9115
The pipe mouth symbol should be consistent with that marked on the equipment in this layout drawing. The sealing surface type is the same as the gasket sealing code. See HG20519.40-92. The year can be omitted in the flange standard number. No.
E(W) Vertical angle Horizontal angle
The length is generally the distance from the center of the equipment to the end face of the nozzle, such as "L" in the following figures, which is marked according to the equipment diagram. Vertical equipment top view
Horizontal equipment side view
Note The "L" value in brackets should be marked in the figure, and the word "see figure" should be filled in the table. Vertical equipment main view
3.0.8.5 Orientation: The horizontal angle of the nozzle is marked according to the direction mark; the vertical angle of the nozzle is a maximum of 180°, 0° upward, 180° downward, and 90° for the horizontal nozzle. For nozzles with special orientations that cannot be shown in the nozzle table, it is allowed to be marked on the drawing, and the word "see figure" should be filled in the table.
Whenever the nozzle orientation can be indicated in the nozzle table, the nozzle orientation may not be marked on the plan view. 3.0.8.6 Coordinates: The coordinates of each pipe opening refer to the coordinates of the end face of the pipe opening, and are marked based on the reference point of the drawing. The coordinates can be in the E and N directions, or in the W and N directions, and should be consistent with the coordinates of the pipeline layout drawing. The unit is in meters. 3.0.9 Pipe rack numbering and representation
3.0.9.1 Pipe rack numbering and representation see HG20519.29-923.0.9.2 Pipe rack positioning
The horizontal pipe bracket is marked with the positioning size, and the vertical pipe bracket is marked with the elevation of the bracket top surface or the supporting surface (such as the platform surface, floor surface, beam top surface). 53
3.0.9.3 In the pipeline layout drawing, each pipe rack is assigned an independent pipe rack number. 3.0.10 When there is a change in the pipeline material (i.e., the grade changes), it should be marked in the drawing according to PID. 3.0.11 Above the title bar of each piping layout drawing, a reduced and shaded index drawing shall be used to indicate the location of the installation area where the drawing is located.
See example drawing
EL 00. 00
EL99850
Elme25e
REX561
L1235-5
Eto2900
T1510-58
Pos.ELroo.too
fosELroo.250
Pl3e28
AsELI98.6 Coordinates: The coordinates of each pipe opening refer to the coordinates of the end face of the pipe opening, and are marked based on the reference point of the drawing. The coordinates can be in the E and N directions, or in the W and N directions, and should be consistent with the coordinates of the pipeline layout drawing. The unit is in meters. 3.0.9 Pipe rack numbering and representation
3.0.9.1 Pipe rack numbering and representation see HG20519.29-923.0.9.2 Pipe rack positioning
The horizontal pipe bracket is marked with the positioning size, and the vertical pipe bracket is marked with the elevation of the bracket top surface or supporting surface (such as platform surface, floor surface, beam top surface). 53
3.0.9.3 In the pipeline layout drawing, each pipe rack is assigned an independent pipe rack number. 3.0.10 When there is a change in the pipeline material (i.e., the grade changes), it should be marked in the drawing according to PID. 3.0.11 Above the title bar of each piping layout drawing, a reduced and shaded index drawing shall be used to indicate the location of the installation area where the drawing is located.
See example drawing
EL 00. 00
EL99850
Elme25e
REX561
L1235-5
Eto2900
T1510-58
Pos.ELroo.too
fosELroo.250
Pl3e28
AsELI98.6 Coordinates: The coordinates of each pipe opening refer to the coordinates of the end face of the pipe opening, and are marked based on the reference point of the drawing. The coordinates can be in the E and N directions, or in the W and N directions, and should be consistent with the coordinates of the pipeline layout drawing. The unit is in meters. 3.0.9 Pipe rack numbering and representation
3.0.9.1 Pipe rack numbering and representation see HG20519.29-923.0.9.2 Pipe rack positioning
The horizontal pipe bracket is marked with the positioning size, and the vertical pipe bracket is marked with the elevation of the bracket top surface or supporting surface (such as platform surface, floor surface, beam top surface). 53
3.0.9.3 In the pipeline layout drawing, each pipe rack is assigned an independent pipe rack number. 3.0.10 When there is a change in the pipeline material (i.e., the grade changes), it should be marked in the drawing according to PID. 3.0.11 Above the title bar of each piping layout drawing, a reduced and shaded index drawing shall be used to indicate the location of the installation area where the drawing is located.
See example drawing
EL 00. 00
EL99850
Elme25e
REX561
L1235-5
Eto2900
T1510-58
Pos.ELroo.too
fosELroo.250
Pl3e28
AsELI9
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