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BS 1553 : Part I : 1977 UDC 003.62 : 62

+ 621.64 + 628.8 + 66.02 + 697

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Specification for

Graphical Symbols for general engmeerlng D

D

Part 1. Piping Systems and plant

Specification des Symboles graphiques pour la construction mecanique generale Partie 1. Canalisations et equipements Spezifikation für Graphische Symbole für allgemeinen Maschinenbau Teil 1. Rohrsysteme und Anlagen

British Standards Institution

Gr 8

BS 1553 : Part 1 : 1977

Contents Foreword organizations Cooperating

Page Inside front Cover Cover Back

Specification 1. Scope 2.References 3. Symbols (or elernents of syrnbols) used in conjunction with other syrnbols General 3.1 Pipelines 3.2 3.3Valves: actuating methods 4.Basic functional syrnbols Pipelines 4.1 4.2 Joints 4.3 End closures 4.4 Supports andhangers Valves 4.5 4.6 Trap functions 4.7 Pipeline flexibility 4.8 Pipelinefeaturesandgeneral equipment 4.9Sensingelements for measurement and control 5. Basic and developed symbols for plant and equipment 5.1Heat transfer equipment 5.2Vesselsand tanks 5.3Pumpsandcompressors

1

1 1 1 2 2 3

3 3 4 4 5 6 6 6

7 7 7 11 13

5.4 Solids handling 5.5Shapingand forming 5.6 Drying 5.7 Materials handling 5.8 Prime movers 5.9 Trucking

6. Heating and ventilating installations Pipelines 6.1 6.2 Ducts (trunks) 6.3Changes of section and/or size of duct (trunk) 6.4 Duct (trunk) bends: representationand design 6.5 Duct (trunk) fittings 6.6 Grills and diffusers Dampers 6.7 6.8 Damper actuation 6.9Heatexchange equipment 6.10 Air conditioning and Ventilation equipment Appendices A.Representation of flow lines crossing (connected and unconnected) B.Example of the use of symbols on a drawing of a low temperature hot water heating installation C. Example of the use of symbols on a drawing of an extraction Ventilation installation

Page 14 17 18 19 22 22

22 22 23 24 24 25 25 26 26 27 28

30

31 32

f oreword For many years BSI has published separate specifications for graphical symbols used on engineering diagrams relating to individual technical disciplines; this has inevitably led to a few inconsistencies between Standards. In this revision of BS 1553 : Part 1 : 1949, which has been prepared under the authority of the Mechanical and the Chemical Standards Committees, an attempt has been made to eliminate such differences and producea Standard which specifies symbols which will be common to heating and ventilating installations and to process plants of all types. T0 accomplish this

aim BS 1553 : Part 4 : 1956 'Graphical symbols for heating and ventilating installations' and BS 974 : 1953 'Symbols for use on flow diagrams of chemical and petroleum plant', have also been revised and incorporated into this Standard. BS 1553 : Part 4 and BS 974 have accordingly been withdrawn. I t is intended that the symbols specified in this Standard should be applied in accordance with the practice recommended in BS 5070.

BS 1553 : Part 1 : 1977

British Standard Specification for

Graphical symbols for general engineering Part 1. Piping Systems and plant

1. Scope

2. References

This Part of BS 1553 specifies graphical symbols for use in the creation of flow and piping diagrams for process plant and heating and ventilating installations. I t is intended that diagrams employing these symbols should be drawn in accordance with the practice recommended in BS 5070.

The titles of the Standards publications referred to in this Standardare listed on the insidebackCover.

3. Symbols (or elements of Symbols) used in conjunction with other symbols 3.1 General No.

3.1

3.1.2

3.1.3

'C

Description

Symbol

.I Mechanical linkage

Weight device

No.

Dexription

3.1.9

Access point

3.1.10

Equipment branch: general symbol NOTE. The upper representation does not necessarily irnply a flange, merely the termination point. Where a breakable connection is required the branch/pipe would be as shown in the lower symbol.

Electrical device

3.1.4 Vibratory or loading

3.1 1.I Equipment penetration

device (any type)

3.1.5

Symbol

(fixed)

Spray device

3.1.12

Equipment penetration (removable)

-a 3.1.6

Rotary movement

3.1.13

Boundary line

3.1.7

Stirring device

3.1.14

Point of Change

3 3

(See 4.1.12 for specific examples)

@

3.1.8

3.1.15

Fan

1

Discharge to atmosphere

4

BS 1553 : Part 1 : 1977

No.

Description

3.1.16

lntake from atmosphere

Symbol

No.

Description

3.3.3

Statically loaded

kymbol

.e. symbol 3.1.4

3.1.17

Trap: release or retention

3.1.18

Flow restrictor (fixed)

3.3.4

Spring loaded

3.3.5

Weight loaded

3.3.6

Quick opening

3.3.7

Quick closing

3.3.8

Float control

3.3.9

Dash pot checked

I

W

3.1.19

Flow restrictor (variable)

J

3.2 Pipelines 3.2.1

3.2.2

3.2.3

3.2.4

3.2.5

3.2.6

Pipeline (major flow Iine)

Pipeline (minor flow line)

51

Pipeline (existing)

3.3.10

Piston

3.3.1 I

Diaphragm

3.3.12

Solenoid

3.3.13

Automatic actuating element

3.3.14

Automatic actuating element, with integral manual actuating element

3.3.15

Manual actuating element

Pipeline (undeground, or concealed)

Existing Pipeline (to be removed)

Pipeline (future)

3.3 Valves: actuating methods 3.3.1

I Manualisolation

3.3.2

I Powersignal

I

2

Y Y

BS 1553 : Part 1 : 1977

~~

No.

Description

3.3.16

Motor

Symbol

B

~~~

Description

4.1.12

lndication of point of Change (i.e. size, specification, level, responsibility, etc. added to symbol 3.1.14)

4. Basic functional Symbols 4.1 Pipelines

4.1.I

4.1.2

!

Crossing (unconnected) (See appendix A)

NOTE. Changes in conditions shouldembrace the arrow

+

Examples:

Responsibility Change

Junction (connected) (see appendix A)

Pipe bore Change I

4.1.3 .

7:

Symbol

No.

I

Heated or cooled NOTE. Heating or cooling medium to be annotated adjacent to Symbol

4.1.4

t

Jacketed NOTE. Healing or cooling medium to be annotated adjacent to Symbol

4.1.5

4.1.6

*

4.1.13

Coincident point of Change

4.1.14

Pipe bore Change (unspecified)

Lagged

U

4.2 Joints 4.2.1

Provision for flexibility (See 4.7 for specific methods)

Butt welded NOTE. The proportions of the weld shouldbe thus:

4

4.1.8

lndication of flow direction

4.1.10

lndication of Pipe size $150 mm example

I50

X

'

line thickness

Soldered or solvent welded

4.2.3

Screwed

4.2.4

Compression

4.2.5

Sleeve: BS 534

lndication of fall (or rio

FALL I: 60 ______)

4.1 1.I

lndication of Support Points (See 4.4 for specific types of supports and hangers)

3

EI

4.2.2

NOTE. lncluded angle of arrow = 30"

4.1.9

\ /

Sleeved NOTE. Fluid or fill of the annulus to be annotated adjacent to Symbol

4.1.7

COMPICONT. 1501100

,

BS 1553 : Part 1 : 1977

No.

Description

4.2.6

4.2.7

Symbol

No.

Description

Socket welded: BS 3799

4.3.7

End closure: quick release

Socket and spigot

4.3.8

End socket and spigot

Symbol

7

4.2.8

Swivel 4.4 Supports and hangers 4.4.1

4.2.9

(Use Symbol 4.1.11 wher a detailed Support or hanger is not required)

Flanged and bolted

4.4.2 4.2.10

Support: basic Symbol

Simple Support

T

Electrically bonded r--1

4.2.1 1

4.4.3

Resilient Support

4.4.4

Adjustable Support

Electrically insulated

T

4.3 End closures 4.3.1

fnd cap: general Symbol lmethod unspecified)

4.4.5

Roller Support

[Annotate as 'detachable' Nhen appropriate) 4.3.2

4.3.3

4.3.4

4.3.5

4.3.6

See 4.1.11

End cap: butt welded 4.4.6

Simple hanger

4.4.7

Resilient hanger

4.4.8

Adjustable hanger

4.4.9

Constant load hanger

4.4.10

Guide

End cap: screwed

End cap: fillet welded

End screwed and pluggec

End flanged and bolted

4

T

BS 1553 : Part 1 : 1977

No.

I

4.4.1 1

Dexription

Anchor I

I Symbol

T

No.

Dexription

4.5.1 1

In-Iine (float operated)

b

I

4.5 Valves 4.5.1

Symbol

4.5.1 2

Flanged

In-line (any type or Pattern) or alternatively

4.5.2

4.5.3

4.5.4

4.5.5

' .

In-line (simple screwdown)

T

4.5.13

3utterfly

-W-

Angle (simple screw down)

4.5.14

;lobe

4.5.1 5

3all

4.5.16

Nedge gate

4.5.1 7

'arallel slide

4.5.18

deedle

4.5.19

Iiaphragm

4.5.20

)Iug

Relief (in-line)

Relief (angle, pressure)

4.5.6

Relief (angle, vacuum)

4.5.7

Check (non-return or reflux)

4.5.8

Check (non-return or reflux) screw-down

4.5.9

3-way

4

4nnotate type of Port ldjacent to symbol .e. T (Tee port) - ( L port)

4.5.10

4-way

4.5.21

'lug 3-way 4nnotate type of Port ldjacent to symbol .e. T (Tee port) - ( L port)

5

m

BS 1553 : Part 1 : 1977

4.6 Trap functions No.

Description

4.6.1

Trap drain, e.g. condensate release

Symbol

9

No.

3escription

4.8.3

'lame arrester

4.8.4

jilencer

Trapped vent, e.g. automatic air valve

4.8.5

-Y

Tundish NOTE. Arrow to be added when discharge is to atrnosphere

4

4.7.2

3pen vent

4.8.7

Separator

4.8.8

Bell mouth

A

4.8.9

Liquid seal, Open

tk

Liquid seal, closed

E b

Bellows

Sleeve extension

__I__ 4.7.3

4.8.10

Expansion loop

C) 4.7.4

Y

4.8.6

4.7 Pipeline flexibility 4.7.1

5 -Q-

[email protected]

iymbol

4.8.11

P

Syphon drain

Flexible hose, flanged example Hydrant

4.8 Pipeline features and general equipment ~

+ 4.8.1

Strainer or filter

4.8.2

Bursting disc

--e 4.8.13

6

Exhaust head

B

z

BS 1553 : Part 1 : 1977

C

.~

4.9 Sensing elements for measurement and

control

Symbol

No.

Description

4.9.1

Point of rneasurement

4.9.2

Meter (any type)

?

No.

Dexription

4.9.7

Rotary displacement

4.9.8

Venturi

4.9.9

Sight flow indicator

;ymbol

NOTE. Letter F indicates flow rneasurement

4.9.3

Orifice plate

-11-

Q 4.9.10

0

*

Variable area meter

4.9.4

Orifice Carrier

4.9.5

Pitot tube

4.9.1 1

Calibrated Pipe run

4.9.6

Turbine or propellor

4.9.12

Diaphragm meter

0

0

0-

NOTE. For letter Codes within the instrument circle and for detailed rneasurement and control Symbols see No.

Dexription

Symbol ~

~~~~

~~~~

~

~

~

~

5. Basicanddeveloped symbols for plant and equipment 5.1 Heat transfer equipment 5.1

.I Heat exchanger (basic Symbols)

-e

Alternative:

e

5.1.2

Shell and tube: fixed tube sheet

5.1.3

Shell and tube: U tube or floating head

H 7

0

BS 1646.

BS 1553 : Part 1 : 1977

No.

Dexription

5.1.4

Shell and tube: kettle reboiler

5.1.5

Air-blown cooler

5.1.6

Plate type

5.1.7

Double Pipe type

5.1.8

Heatinghooling coil (basic Symbol)

5.1.9

Fired heater/boiler (basic Symbol)

5.1

5.1.11

Symbol

.I0Automatic stoker

Upshot heater

3 DETAIL A

Where complex burners are ernployed the 'burner block' rnay be detailed elsewhere on the drawing, thus:

DETAIL A

8

BS 1553 : Part 1 : 1977

No.

Description

5.1.12

Cabin heater

5.1.13

Fire tube boiler

5.1 .I4

Electrical heater (basic Symbol)

5.1.15

Oil burner

5.1.16

Gas burner

5.1.17

Tank heater

Symbol

-

L

4 5.1.18

Electric furnace

5.1.19

Cooling tower (basic symbol)

5.1.20

Cooling tower: natural draft

BS 1553 : Part 1 : 1977

No.

Dexription

5.1.21

Zooling tower: forcedlinduced draft

Symbol

\-I

[Fans to be included as appropriate)

5.1.22

Nater-cooled condenser

5.1.23

Air-cooled condenser, natural/forced draft Add fan 3.1.8 if required

5.1.24

Evaporative condenser

5.1.25

Unit humidifier

5.1.26

Water chilling evaporator

5.1.27

Air cooling evaporator

5.1.28

Oil Separator

5.1.29

Extractor hood. Open type

5.1 -30

Extractor hood, slot type

f l

10

b '

BS 1553 : Part 1 : 1977

C

5.2 Vessels and tanks No.

Description

5.2.1

3rum or simple pressure vessel (basic Symbol)

5.2.2