GB/T 36290.2-2018Process diagrams for power plants -- Part 2: Graphical symbols (English PDF)

4.1 General

Graphical symbols shall comply with the ISO 14617 (all parts) standards.

General rules for graphical symbols are given in GB/T 16901.1. The graphical symbol CAx application rules are given in GB/T 16901.2.

Special rules and guidelines for the application of graphical symbols in drawings are given in ISO 15519-1.

4.2 Graphic symbol size

The graphical symbols in this section are represented in a grid system with a modulus of M = 2.5 mm.

4.3 Creation of a new symbol example

This section covers the most commonly used graphical symbols in power plant drawings. Cannot find what is needed in this section or in ISO 14617 (all parts)

For graphic symbols, the required graphic symbols should be created based on the basic and supplementary graphic symbols in ISO 14617 (see Appendix A).

When the required graphical symbols are not specified in ISO 14617, and cannot be based on basic and supplementary graphical symbols in ISO 14617

When created, a new graphical symbol request shall be made in accordance with ISO /IEC Guide Part 1..2016 Appendix SH.

4.4 Symbols of large/complex objects

In this section, the graphic symbols of large and complex objects such as boilers, steam turbines, flue gas treatment plants, boiler feed pumps, etc. are not marked.

Normalization.

In drawings, large and complex objects should be represented by outlines, and considering the correct placement of the devices that make up the large and complex objects,

Connect and measure graphical symbols such as PCI (process control information; see 18.1).

Appendix B gives examples of large and complex object symbols.

5.1 Overall structure

This section is divided into the following group categories.

---Chapter 6 - Connections and related devices;

---Chapter 7 - Fluid flow control, valves, flapper doors, safety devices;

---Chapter 8 - Executive Agency;

---Chapter 9 - Fluid delivery, pumps, fans, compressors;

--- Chapter 10 - fluid energy transfer, heat exchangers, condensers, cooling towers, etc.;

--- Chapter 11 - fluid handling, filtration, separation, mixing, etc.;

---Chapter 12 - Storage, boxes, tanks, containers, accumulators, etc.;

--- Chapter 13 - material conveying and flow control, conveyors, feeders, conveyors, etc.;

--- Chapter 14 - material processing, separation, crushing, mixing, etc.;

---Chapter 15 - Thermal energy generating devices, boilers, boiler equipment, etc.;

--- Chapter 16 - engine, steam turbine, generator, motor, etc.;

---Chapter 17 - Mechanical transmission, shafts, bearings, couplers, etc.;

--- Chapter 18 - Instrumentation, Measurement and Control.

5.2 Registration Number

Graphical symbols, symbolic examples and application rules in ISO 14617 are assigned a unique registration number, see ISO 14617-1.

The symbol example created in this section assigns its registration number during the 6000~7999 series, as shown in Table 1.

Note. In the standard preparation stage of this section, the new graphic symbols created in this section and implemented in ISO 14617 are assigned the initial "P" registration number.

(P = power station). If these preliminary registration numbers have not been approved by ISO 14617 before the release of this section, this section will be issued under these preliminary registration numbers.

Subsequently, in the first round of periodic review of this section, these preliminary registration numbers are replaced by the final registration number approved by ISO 14617.

Table 1 Overview of ISO 14617 and the registration number type of this standard

Theme ISO 14617 This standard

Graphic symbol nnn

Nnn

Pnnn

Registration number from ISO 14617

Initial registration number for the new ISO 14617 symbol

Symbol example Xnnn

Xnnn

X6nnn

Registration number from ISO 14617

Registration number for this standard symbol example

5.3 Representation of graphical symbols in this section

In this section, the graphical symbols are represented in a 2.5M lattice grid system with imaginary connections, as shown in Figure 2. These ones

The imaginary connections and lattice grids are not part of the graphical symbols.

When there is a mandatory flow requirement, the imaginary connection will be accompanied by an arrow, as shown in Figure 2b).

a) heat exchanger b) spring relief valve

Description.

1---graphic symbol;

2---imaginary connection;

3---2.5M lattice grid.

Figure 2 Representation of graphical symbols in this section

5.4 Description of the table representation

In this section, the graphical symbols are represented in a table with column headings, as shown in Table 2.

Table 2 column headings

Column description

Serial number in each clause/sub-clause

Graphic symbol represented by a solid line on a lattice grid

Preferred description of symbolic name graphic symbols

Reference number is used for the registration number of the actual symbol

Encoding a 2-digit code according to IEC 81346-2

6.1 Fluid connection

6.1.1 Functional connection

Number symbol symbol name reference number code

6.1.1.1

Pipes, flue, duct

Line width 0.5

X6001 WP

6.1.1.2

Instrument connection, control connection in process control chart (PCD)

Line width 0.25

X6002 WPWG

6.1.1.3

Control lines, control connections in the process flow diagram (PFD)

Line width 0.25, ISO 128-20 basic line type 02

422 WG

(continued)

Number symbol symbol name reference number code

6.1.1.4

Pipeline representation in adjacent diagrams

Adjacent pipeline representation in the same figure

Line width 0.5, ISO 128-20 basic line type 12

X6017 WG

6.1.2 Process media type connection

Number symbol symbol name reference number code

6.1.2.1

steam pipes

Line width 1.0

X6005 WP

6.1.2.2

Condensate, cooling water, water supply pipe

Line width 0.5

X6006 WP

6.1.2.3

Oily water pipeline

The line width is 0.25. Circle. Line width 0.25, D = 2.0. Interval 7.5

X6007 WP

6.1.2.4

Oily steam pipe

The line width is 0.7. Circle. Line width 0.25, D = 2.0. Interval 7.5

X6008 WP

6.1.2.5

Raw water, untreated water pipeline

The line width is 0.25. Line segment. line width 1.0, length 9 and 3. Interval 3

X6009 WP

6.1.2.6

Sewage and waste water pipeline

The line width is 0.25. Dot. D = 2.0. Interval 7.5

X6010 WP

6.1.2.7

Air duct

The solid line width is 0.5. Dash = 422. Line gap 1.0

X6011 WP

6.1.2.8

Solvent, chemical pipeline

The line width is 0.25. Line segment. Line width 1.0, length 5. Interval 5

X6012 WP

6.1.2.9

Solid fuel, bulk fuel pipeline

The line width is 0.25. Line gap 1.0. Line segment/interval 4.0

X6013 WP

6.1.2.10

Combustible waste pipeline

The line width is 0.25. Line gap 1.0. Dot. D = 2.0, interval 7.5

X6014 WP

6.1.2.11

Oil pipeline

The line width is 0.25. Line gap 1.0

X6015 WP

6.1.2.12

Combustible gas pipeline

The line width is 0.25 0.7. Line gap 1.0

X6016 WP

6.1.2.13

Non-combustible gas, flue gas, inert gas

The center line width is 0.7. The outer line is 0.25 wide. Line gap 1.0

X6018 WP

6.1.2.14

Ash, slag pipe

The line width is 0.25. Vertical line. interval 4.0

X6019 WP

6.1.2.15

Fly ash pipe

The line width is 0.25. Line gap 1.0. Line segment/interval 2.0

X6020 WP

6.1.3 Simplified representation

Number symbol symbol name reference number code

6.1.3.1 Transition between multi-line and single-line X6030 WP

6.1.4 Flow, branch, cross, etc.

Number symbol symbol name reference number code

6.1.4.1 Mainstream to 241

6.1.4.2 Mainstream to 242

6.1.4.3 Energy or signal flow 249

6.1.4.4 T-branch, Form 1 X504

6.1.4.5 T-branch, Form 2 X505

6.1.4.6 Connection type crossover X506

6.1.4.7 Unconnected Cross X6031

6.1.4.8 Cable break P078

6.1.5 Pipe joints, connectors, etc.

Number symbol symbol name reference number code

6.1.5.1 Flange connection 511 XL

6.1.5.2 Clamping flange connection 513 XL

6.1.5.3 Threaded connection 514 XL

(continued)

Number symbol symbol name reference number code

6.1.5.4 Solder connection 515 XQ

6.1.5.5 Quick connector, shown as non-connected state P032 XM

6.1.5.6 Self-closing quick connector, shown as non-connected state P033 XM

6.1.6 Connecting accessories

Number symbol symbol name reference number code

6.1.6.1 lyophobic, draining, draining (eg hydrophobic), funnel 2040

6.1.6.2 lyophobic tray, drain pan, drain tank (such as drain tank) X6035

6.1.6.3 Exhaust (steam), deflation (steam), export to the atmosphere 2039

6.1.6.4

Exhaust (steam), deflation (steam), outlet to the outside of the enclosure or construction

Outside the object

X6040

6.1.6.5 Siphon 2038

6.1.6.6 Pipeline slope 3061

6.1.6.7 Through the wall or roof, the general symbol P009

(continued)

Number symbol symbol name reference number code

6.1.6.8 Through the wall, etc., general symbol 3001

6.1.6.9

Through the wall, sealed

"*" should be replaced with some type of seal logo, for example

Fire prevention

6.1.7 Pipe fittings

Number symbol symbol name reference number code

6.1.7.1 Reducer pipe, pipe size head P069 XL

6.1.7.2 Monolithic flange P023 XL

6.1.7.3 Flange cover P029 XL

6.1.7.4 Threaded Cap 518 XL

6.1.7.5 Plug P028 XL

6.1.7.6

Retractor, compensator

Form 1

533 XM

6.1.7.7

Retractor, compensator

Form 2

P052 XM

6.1.7.8 Flexible pipe, hose 444 XM

6.1.7.9 Multi-stage throttling device X6032 RN

6.1.7.10 Closed orifice plate P087 RN

(continued)

Number symbol symbol name reference number code

6.1.7.11

Flanged orifice plate

Form 1

772 RN

6.1.7.12

Flanged orifice plate

Form 2

P053 RN

6.1.7.13 Rotary blocking plate, close 2044 RN

6.1.7.14 Rotary blocking plate, open 2045 RN

6.1.7.15 Flow Rectifier 2032 W_

6.1.7.16 Silencer 2033 RP

6.1.7.17 Glass observation window 2034

6.1.7.18 Hose reel, fire hose P031 WN

6.1.7.19 Rupture disc 2035 FL

6.1.7.20 Air inlet or outlet grille P030 HQ

6.1.8 Pipe insulation, heat insulation, heat tracing, etc.

Number symbol symbol name reference number code

6.1.8.1 Insulation pipe, insulated pipe X322 RQ

6.1.8.2 Jacket pipe X409 EP

6.1.8.3 Heating or accompanying cooling

P068

X8174

EB

6.1.8.4 Electric Heat Tracing X6050 EB

6.2 Mechanical connection

Number symbol symbol name reference number code

6.2.1

Mechanical linkage, shaft

Form 1

Line width 0.5, line gap 1.0

402 WQ

6.2.2

Mechanical linkage, shaft

Form 2

Line width 0.5

403 WQ

6.2.3

Electrical insulation mechanical linkage, shaft wire

Line width 0.5, short stroke 4.0, gap 2.0

404 WQ

7.1 valve

7.1.1 On-off valve

Number symbol symbol name reference number code

7.1.1.1 Straight-through two-way switching valve, general symbol 2101 QM

(continued)

Number symbol symbol name reference number code

7.1.1.2 Angle two-way valve, general symbol 2102 QM

7.1.1.3 Three-way valve, general symbol 2103 QM

7.1.1.4 four-way valve, general symbol 2104 QM

7.1.1.5 Two-way on-off valve with membrane actuator, fault off X2101 QM

7.1.1.6 Two-way switching valve with cylinder or hydraulic cylinder actuator X6101 QM

7.1.1.7

Two-way switching valve with cylinder or hydraulic cylinder actuator, fast closing -

Fault off

X6102 QM

7.1.1.8

Two-way electric switch valve

X2104 QM

7.1.1.9 Two-way electric switch valve and integrated electric bypass valve X6103 QM

7.1.2 Check valve

Number symbol symbol name reference number code

7.1.2.1

Check valve, general symbol

Form 1

X6105 RM

7.1.2.2

Check valve, general symbol

Form 2

P090 RM

7.1.2.3 Check Valve and Manual Shutoff Valve - Combination X2112 RM

7.1.2.4

Check valve with quick-release auxiliary cylinder or hydraulic cylinder actuator -

Fault off

X6107 RM

7.1.2.5 Check valve with closed auxiliary cylinder or hydraulic cylinder actuator X6104 RM

7.1.2.6 Pump check and recirculation combination valve X6108 RM

7.1.2.7

Pump check and recirculation combination valve, check valve in recirculation

Valve outlet

X6126 RM

7.1.2.8 Breathing valve X6109 RM

7.1.3 Regulating valve

Number symbol symbol name reference number code

7.1.3.1 Regulating valve, general symbol X6110 QN

7.1.3.2 Angle control valve, general symbol X6111 QN

7.1.3.3 Three-way distributed control valve, general symbol X6112 QN

7.1.3.4 Three-way hybrid control valve, general symbol X6113 QN

7.1.3.5 Double diaphragm actuator adjustment valve, fault protection X6118 QN

7.1.3.6 Desuperheating and pressure reducing steam regulating valve (temperature reducing pressure reducer) - integrated water spray X6114 QN

7.1.3.7 Desuperheating and pressure reducing steam regulating valve (temperature reducing and pressure reducing device) - downstream water spraying X6115 QN

7.1.3.8

Combined steam regulator and safety valve with downstream desuperheater.

Independent actuator, regulating valve actuator failure, safety

Quick closing of valve actuator failure

X6116 QN

(continued)

Number symbol symbol name reference number code

7.1.3.9 Self-operated temperature control valve with independent sensor X6117 QN

7.1.3.10 Self-operated back pressure regulating valve X2132 QN

7.1.3.11 Self-operated pressure reducing regulator X2133 QN

7.1.3.12 Preset regulator valve, such as flow balance valve X6119 QN

7.1.4 Safety and Pressure Relief Valves

Number symbol symbol name reference number code

7.1.4.1 Safety valve, general symbol X6120 FL

7.1.4.2 Straight-through spring safety valve, general symbol X6121 FL

7.1.4.3 Angle spring safety valve, general symbol X6122 FL

(continued)

Number symbol symbol name reference number code

7.1.4.4

With fail-safe quick-open cylinder or hydraulic cylinder actuator and under

Steam desuperheater steam bypass valve

X6123 FL

7.1.4.5

Breathing valve with safety function, such as tank (can) overpressure and vacuum

protection

X6124 FL

7.1.4.6 Spring type pressure relief valve X6125 FL

7.1.5 Special valve

Number symbol symbol name reference number code

7.1.5.1 Steam trap X6130 QN

7.1.5.2 Air release valve, exhaust valve X6131 QN

7.1.6 Supplementary valve symbol

Number symbol symbol name reference number code

7.1.6.1 Needle valve 2125 QM

7.1.6.2 Globe valve 2121 QM

(continued)

Number symbol symbol name reference number code

7.1.6.3 Piston or Plunger Valve 2127 QM

7.1.6.4 Gate valve 2124 QM

7.1.6.5

Disc valve

Form 1

2126 QM

7.1.6.6

Disc valve

Form 2

P089 QM

7.1.6.7 Ball valve 2122 QM

7.1.6.8 Plug valve 2123 QM

7.1.6.9 Diaphragm valve 2128 QM

7.1.6.10 Hose valve, hose valve 2129 QM

7.1.6.11 L-shaped internal cavity three-way or four-way valve 2113 QM

7.1.6.12 T-type internal cavity three-way or four-way valve 2114 QM

7.1.6.13 Double L-type internal cavity four-way valve 2115 QM

7.1.7 Valve characteristics

Number symbol symbol name reference number code

7.1.7.1 Valve for the injection of sealing fluid P058 WP

7.1.7.2 Valve for suction connection P059 WP

7.1.7.3 Valve with valve chamber overpressure relief valve, venting upstream X6140 QM

7.1.