IS 2379 : 1990 (Reaffirmed 20(0)

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Chemical Engineering Plants and Related Equipment Sectional Committee, HMD 17

FOREWORD This Indian Standard (First Revision) was adopted by the Bureau of Indian Standards on 27 March 1990, after the draft finalized by the Chemical Engineering Plants and Related Equipment Sectional Committee had been approved by the Heavy Mechanical Engineering Division Council. Lack of uniformity of colour coding of pipelines in industrial installations has often been responsible for des~ruction of property and injury to personnel due to faulty manipulations of values, particularly when outside agencies. like fire-fighting squads, are called in. Uniformity of colour marking promotes greater safety, lessens the chances of error and reduces hazards involved in the handling of material inside the pipelines. Identification of the particular contents of the pipelines is achieved by imposing suitable colour bands on the ground colour. Lettering, as a mode of identification, is also recommended for chemical industry as this will reduce the possibility of mistakes in identification. Lettering may include the contents by name, chemical formula, or by unmistakable and commonly understood abbreviations. This standard was first published in 1963. The present revision is based on the prevailing practices in the industry. In this revision use of legends have been recommended for various types of hazards. Hydrocarbon, Naptha and some more chemicals and allied products have been included in the standard. The title of the standard is also revised to bring it in line with the latest guidelines. In the formulation of this standard assistance has been derived from the following publications: BS 1710 : 1984 ASA A 13.1-1981 Specification for identification Standards Institution Scheme for the identification Standards Institute. of pipelines and services. British

of piping systems. American National

IS 2379 : 1990

Indian Standard

PIPELINES

IDENTIFICATION
CODE ( First Revision)

- COLOUR
paints used

1 SCOPE This Indian standard covers the colour schemefor the identification of the contents of pipelines carrying Ouids in domestic and public buildings and such industrial installations where a specificcolour code does not ~st. 1.1 For the purpose of this standard, piping systems shall include pipes of any kind and in addition fittings, valves, and pipe coverings. Supports, brackets or other accessories are specifically excluded from application of this standard. 1.2 ,This standard is not applicable to pipelines buried undersround or used for electrical services. 2 IW'ERENCE$ 2 .tTh~J()Jliii&"'Jndian, onctatQ .~rd. . stanciaros are necessary ac1j ,'" IS No. Tille S: 1978 Colours for ready mixed paints and enamels ( third revision) 2339: 1963 Aluminium paint for general purposes, in dual container 3 TERMINOLOGY

4.2 It is recommended that the should produce a glossy finish. S COLOURS

5.1 In order to identify the contents of the pipelines, a large Dumber of colour shades are required. Recommendation regarding shades of colours that may be used are given in IS 5: 1978.

6 IDENTIFICATION The system of colour coding consists of a ground colour and colour bands superimposed on it. 6.1 Ground Colours
The ground colour i4entifies the basic nature of the fluid carried (~ee Fig. I) and also distinguishes one Ouid from another, for example water from oil. The. various ground colours are indicated in Table I.~ 6.1.1 Ground colour shaH be applied throughout the entire length for uninsulated pipes, for insulated pipes, on the metal cladding or on the pipes of material such as non-ferrous metals, austenitic stainless steel, plastic, etc, ground colour coating of minimum 2 m length or of adequate length, not to be mistaken as colour band, shaH be applied. 6.2 Colour Bands

3.0 For the purpose of this standard, the following definitionsshall apply. Colour bands are superimposed on the ground colour ( see Fig. 2) to distinguish: 3.1 Huard a) One kind or condition of a fluid from Risk involved to life, health or property due to another kind or condition of the same the poisonous nature of combustibility or other fluid, or causes of danaerous substances. b) One fluid from another but belonging to the same group, for example carbon 3.21AC~.. monoxide from coke oven gas or diesel Painting, labelling. stencilling or otherwise fuel from furnace fuel. indicating the contents of a pipeline. 7 APPLICATION 3.3 He .'..do,.fPipeliDes, 7.1 Ground Colour A schemeconJispng of a colour code or lettering or a combinatipn of both 1 intended for the Colours as given in Table I shall be applied in identification of the contents Of the pipelines. one of the following ways: a) Throughout the entire length (see Fig. IA); 3.4C Pipa ... ..,..... b) As a colour coating of adequate length, Any 8uid-carryiq D1edia in the form of pipes, or - (but in no case less than 300 mm) so conduits, with their coveriqa; this excludes media that it is not mistaken for a colour band used for the pneumatic coiIveyance of solids. ( see Fig. 1B); 4CPAINTS c) As a colour panel; d) On a label attached to the pipe; or 4C.lAppropriate quality of paints conforming to relevait Indian Standards, shall be used for e) By the use of coloured adhesive tapes of suitable material. colour marking.
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IS 2379 : 1990

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Ground

Colour-Applied to Full Section

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COLOUR

FIG. 1
Table 1

GROUND

Ground Colours
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( Clauses 6. I and 7.1 ) --.Substance

Water Steam S~a green Aluminium Light brown to IS 2339 Colour

Mineral, vegetable and animal oils, combustible liquids Acids

-Air Gases Alkalies Ciiher liquids/gases
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Dark violet Sky blue Canary ycllow Smoke grey

which do not need identification

Black Dark admirality grey

Hydrocarbons/ organic compounds

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COLOUR BAND 25mm min.

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FIG. 2

Dmin. GPOUND COLOUR EXTENDED ON BOTH SIDES OF THE COLOUR BAND TO AVOID CONFUSION

COLOUR BAND SUPERIMPOSED ON GROUND

COLOUR

1 .'1

IS 2379 : 1990 7.2 Wherever the ground colour is not applied throughout the entire length. it shall be applied near valves, junctions, joints, service appliances, bulkheads, walls, etc ( see Fig. 3). 7.2.1 When colour bands are superimposed on the ground colour, the ground colour shall extend sufficiently on both sides of the colour bands to avoid confusion (see Fig. 2 and 3 ). 7.3 Colour Banels They shall be superimposed on ground colour at the following location: a) At battery limit points; b) Intersection points and change of direction points in piping ways; c) Other points such as midway of each piping way, near valves, junction joints of service appliances, walls, on either side of pipe culverts; d) For long stretch yard piping at 50 m interval; and e) At start and terminating points. 7.3.1 Colour bands shall be arranged in the sequence shown in'Tables 2 to 5, and the sequence follows the direction of flow (see Fig. 3). For example, Fig. 3' shows the colour code for a pipe carrying freon where the light grey and dark violet colour bands have-sequence numbers I and 2. 7.3.2 The relative proportional widths of the first colour band to the subsequent bands shall be 4 : I (see Fig. 3). 7.3.3 As a rule minimum width of colour band shall confirm to the following Table: Nominal Pipe Size 80 NB and below Over 100 NB up to ISO NB Over 200 NBup to 300 NB Over 350 NB Width L (mm) 25 50 75 100 For insulated pipes, nominal pipe size means the outside diameter of insulation. 7.4 Valves shall be painted with the same colour as the main pipelines except when the pipeline has been provided with the safety colour, the valves shall be painted red, for fire fighting; yellow, with black diagonal stripes, for warning of danger; and french blue in conjunction with the green basic colour, to denote pipes carrying fresh water, either potable or non-potable. 7.5 The colour coding as prescribed ill this standard and as applicable to pipelines for general services, pipelines conveying industrial gases hydrocarbons and naphta and pipelines conveying medical gases are given in Tables 2, 3, 4 and 5 respectively. 7.6 All uninsulated pipes having temperatures above 100GC( Heat resistant Aluminium painted) neeu not be identified with colour bands. As special case if required colour bands may be applied using Teflon Tape. 8 HAZARDS 8.1 When it is desired to indicate that a pipeline carries a hazardous material, a panel of colour of suitable width (minimum 100 mm) as given below shall be superimposed on the ground colour at suitable intervals: a) Slightly Radioactive Hazards - A base colour of jasmine yellow with black dots suitably superimposed (see Fig. 4A );
b) Highly Radioactive Hazards

base

colour of light orange with cross diagonal stripes of black colour, suitably superimposed ( see Fig. 4B); and c) Other Hazards Equal diagonal stripes of black and golden yellow colours (see Fig. 4C). Different legends for various types of hazards other than radioactivity like that for flammable or explosive materials, chemically active or toxic materials, etc, may be indicated by lettering.

FIRST

COLOUR BAND

SECOND COLOUR BAND

NOTE
FIG. 3

Arrow indicate the direction

of flow CARRIED, FREON

COLOUR BANDS ON GROUND

COLOUR-FLUID

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IS 2379: 1990 7.2 Wherever the ground colour is not applied throughout the entire length. it shall be applied near valves, junctions, joints, service appliances, bulkheads, walls, etc ( see Fig, 3 ). 7.2.1 When colour bands are superimposed on the ground colour. the ground colour shall extend sufficiently on both sides of the colour bands to avoid confusion ( see Fig. 2 and 3 ). 7.3 Colour Bands They shall be superimposed on ground colour at the following location: a) At battery limit points; b) Intersection points and change of direction points in piping ways; c) Other points such as midway of each piping way, near valves, junction joints of service appliances, walls, on either side of pipe culverts; d) For long stretch yard piping at 50 m interval; and e) At start and terminating points. 7.3.1 Col~ur bands shall be arraflged in the sequence show!1 in'Tables 2 to 5, and the sequence follows tlie direction of flow (see Fig. 3). For example, Fig. 3 shows the colour code for a pipe carrying !freon where the light grey and dark violet colour bands have sequence numbers I and 2. 7.3.2 The relative proportional widths of the first colour band to the subsequent bands shall be 4 : ] (see Fig. 3). 7.3.3 As a rule minimum width of colour band shall confirm to the following Table: Nominal Pipe Size 80 NB and below Over 100 NB up to 150 NB Over 200 NB up to 300 NB Over 350 NB Width L (mm) 25 50 75 100 For insulated pipes, nominal pipe size means the outside diameter of insulation. 7.4 Valves shall be painted with the same colour as the main pipelines except when the pipeline has been provided with the safety colour, the valves shall be painted red, for fire fighting; yellow, with black diagonal stripes, for warning of danger; and french blue in conjunction with the green basic colour. to denote pipes carrying fresh water, either potable or non-potable. 7.5 The colour coding as prescribed in this standard and as applicable to pipelines for general services, pipelines conveying industrial gases hydrocarbons and naphta and pipelines conveying medical gases are given in Tables 2, 3, 4 and 5 respectively. 7.6 All uninsulated pipes having temperatures above 100C ( Heat resistant Aluminium painted) need not be identified with colour bands. As special case if required colour bands may be applied using Teflon Tape. S HAZARDS 8.1 When it is desired to indicate that a pipeline carries a hazardous material, a panel of colour of suitable width (minimum 100 mm) as given below shall be superimposed on the ground colour at suitable intervals:
a) Slightly Radioactive Hazards

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base

colour of jasmine yellow with black dots suitably superimposed (see Fig. 4A ); b) Highly Radioactive Hazards - A base colour of light orange with cross diagonal stripes of black colour, suitably superimposed (see Fig. 4B); and
c) Other Hazards

Equal diagonal

stripes

of

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PROPORTIONAL WIDTHS L,: 1

black and golden yellow colours (see Fig. 4C). Different legends for various types of hazards other than radioactivity like that for flammable or explosive materials, chemically active or toxic materials, etc, may be indicated by lettering.

FIRST

COLOUR BAND

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SECOND COLOUR BAND

NOTE -

Arrow indicate the direction

of flow CARRIED, FREON

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COLOUR BANDS ON GROUND

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COLOUR-FLUID

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IS 2379 : 1990
Table 2 Colour Code for General Senices ( Clauses 7.5 and 9.1 )
I Contents Ground Colour
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Pi

First Colour Band

Second Colour Band

WATER: Cooling

Boilerfeed water Condensate

Drinking Treated

Sea green Sea green

Sea green
Sea green Sea green

French blue Gulf red Light brown French blue Light orange

Signal red -

Fire water Central heatingbelow6O.C

Central heating 60C to lOO.C Central heating above Ipo.C Cold water down service from storage tanks Domestic, hot

Fire red Sea green

Sea I:reen Sea green Sea green Sea green

Crimson red Canary yellow

Dark violet Dark violet French blue Light grey

Signal red Canary yellow

Hydraulic power
Sea. river, untreated Filtered water Soft water Warm water Chilled water Sprinkle and hydrant water Waste water AIR: Compressed, up to and including

Sea green
Sea green Sea green Sea green Sea green Sea green Sea green Sea green

Black
White Light brown Light brown Light grey Black White Canary yellow

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Signal red Canary yellow Canary yellow Signal red Signal red

15 kg/em' Compressedto over 15k8lcm' Plant air Instrument air Dry vacuum Wet vacuum Veryhigh pressuresteam High pressure steam Mediumpressuresteam

Sky blue

Signalred Silvergrey French blue

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Sky blue Sky blue Sky blue White

White

Dark violet

Low pressure steam Drainage Towngas OILS: Light diesel fuel High speeddiesel fuel Paraffinoil Quenchingoil Furnace fuel Lubricating oil Hydraulicpower
Transformer oil

Aluminiumto IS 2339 Aluminiumto IS 2339 Aluminiumto IS 2339 Aluminiumto IS 2339 Black Canary yellow Light brown Light brown I.ight brown Light brown Light brown Light brown Light brown
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Light brown

Signalred French blue Gulf red Canary yellow

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Brilliantgreen Signalred Canary yellow French blue Light grey Dark violet
Light orange

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IS 2379 : 1990 Table 3 Colour Code for Industrial Gases

(Clauses 7.5 and 9.1 )
Contents Ground Colour First Colour Band Second Colour Band

Canary yellow
Canary yellow Canary yellow Canary yellow Canary yelow Canary yellow

Ammonia
Chlorine Hydrocyanic acid Phenole Sulphur dioxide Acetylene

Dark violet
Dark violet Dark violet Dark violet Dark violet Service brown

Light orange Post office red Smoke grey Golden brown

Flare gases HydrogeDsulphide Argon

Benzole Blast furnace gas Butane Coal gas Carbon dioxide (temperate) Carbon monoxide Coke oven gas Ethylchloride ( inflammable) Ethylchloride ( non-inflammable) Ethylene Etbylene oxide Freon ( chlorofluoro derivative of methane and etbane ) Helium Hydrogen Methane Mctbylbromide Methylchloride ( inflammable) Mctbylchloride ( non-inflammable) Neon Nitrogen

Canary yellow Canary yellow

Canary yelJow Canary yellow Canary yellow Canary yellow Canary yellow Canary yellow Canary yellow Canary yellow Canary yellow Canary yellow Canary yellow Canary yellow Canary yellow Canary yellow Canary yellow Canary yellow Canary yellow Canary yellow Canary yeUow Canary yellow Canary yellow

French blue Light grey

Gulf red French blue

Dark violet Signal red Signal red Signal red Light grey Signal red Signal red Light grey Light grey Dark violet Dark violet Light grey Light brown Signal red Signal red French blue Brilliant green Brilliant green Light brown Black White

Brilliant green

Dark violet Signal red White Signal red Brilliant green Dark violet

French blue Light brown Black Signal red French blue Black

Oxygen
Propane Phosgene

Canaryyellow
Canary yellow Canary yellow

White
Signal red Black Black White

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IS 2379 : 1990
Table 4 Colour Code for Hydrocarbons and Naptha ( Clauses 7.5 and 9.\ )
Ground Colour First Colour Band Second Colour Band Smoke grey Gulf red

Contents

Propylene F.P. (Liquid) PrOPYlene ( C.G.) Ethylene glycol Ethylene Di-chloride ( Liquid)

Dark Admirality grey Dark Admirality grey Dark Admirality Dark Admirality gry grey

Brilliant green Brilliant gre:n Brilliant green Gulf red

Benzene Butadine
Acetone Methanol Naptha ACIDS Phosphoric acid

Dark Admirality grey Dark Admirality grey

Dark Admirality Dark Admirality Dark Admirality grey grey grey

Canary yellow Black

Black Deep buff Light brown

Canary yellow -Black

Dark violet

Silver grey

Hydrofluoricacid
Sulphuric Nitric acid Hydrochloric Acetic acid acid acid

Dark violet
Dark violet Dark violet Dark violet Dark violet

Signalred
Brilliant green French blue

French blue Light orange Light orange Light orange

Signal red Silver grey

CHEMICAL & ALLIED PRODUCTS Brine

caustic solution

Black
Smoke grey

White
Light orange

Classified
Spinbath concentrative sulphuric acid Dissolving Causted Evaporated spinbath Floculent solution
Lime Mercury Rum-off caustic

Black
Dark violet

Canary yellow
Brilliant green Light orange Light orange Canary yellow Brilliant green
White White White

Canary yellow White

1.

Dark violet Black Black

Smoke grey Black Smoke grey

Brilliant green

Canary yellow Brilliant green

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White

'ReCOvered caustic Carbon disulphide

Smoke grey Black

Signal red Light orange

White

Strong'caustic Steepingcaustic
Sodium sulfide Soap solution Spinbath supply Spinbath return

Smokegrey Smokegrey
Black Black Black Black

French blue Golden yellow

Brilliant green Light orange White Golden yellow

Canary yellow White Canary yellow

Sodiumcarbonate solution
Waste caustic Waste spinbath Viscose

Dark violet
Dark violet Black Black

1asmineyellow
White 1asmine yellow I Golden yellow

Canary yellow

Brilliant green

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IS 2379 : 1990 Table 5 Colour Code for Medical Gases ( Clauses 7.5 and 9. I )
First Colour Band
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. Gas
Air Cyclopropane Carbon dioxide Ethylene Hclium Oxygen Oxygen and carbon dioxide mixture

Ground Colour Band

Sky blue Canary yellow

White Light orange Light grey Dark yellow Light brown White White White French blue

Second Colour Band Black

Canary yel10w Canary yellow Canary yel10w Canary yellow Canary yel10w Canary yellow Canary yellow

Signal red

Light grey Light brown Signal red

Oxygen and helium mixture Nitrous oxide

Nitrogen Vacuum

Canary yellow Sky blue

Black Black

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POSITIONING OF DOTS

Hazard Marking for Slightly Radioactive Fluids

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BACKGROUND OF NO. 557 LIGHT ORANGE WITH BLACK CROSS STRIPES

PROPORTIONALWIDTH 4: 1 BLACK CROSS STRIPES Hazard Marking for Highly Radioactive

Fluids

EQUAL WIDTH

STRIPES OF BLACK AND NO. 356 GOLDEN YELLOW

4C

Hazard Marking for Other Kind of Hazards

FIG. 4 DETAILS OF HAZARD MARKING

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IS 237' : 1990 , ADDITIONAL IDENTIFICATION

When further identification is required to supplement the colour code, this may be done by the particular industry for its own use. 9.1 Lettering Lettering is recommended for Chemical Industry ( see Fig. 3 and 5 ), for the products not covered in Tables 2 to S. For steam, temperature and pressure shall be indicated after colour indication, by lettering. The recommended size of lettering for pipes of different diameters is given below: Outside Diameter of Pipe or Covering Size of Legend attached to the pipe, the direction of flow may be indicated by the pointed end of the label or badge. Sizes of arrow shall be as given in Fig. 6. 9.2.t For central heating systems or other closed circuits where it is necessary to indicate separately, the flow and retu en pipes, this shall be done by the use of the word 'FLOW' or the letter 'F' on the one pipt' and the word 'RETURN' or the letter 'R' on the other. 10 VISIBILITY OF MARKINGS 10.1 Attention shall be given to the visibility of colour markings and the letterings. Where the pipelines are located above the normal line of vision of the operator, the lettering shall be placed below the horizontal line of the pipes, as shown in Fig. 7. to.2 Preferably colouring shall be all around the pipe wherever possible, if not, the extent of colouring along the circumference is to be decided by purchase Engineer in charge depending upon direction of visibility at site. 10.3 The electrical illumination of plant in the night should be such that the shades of colours are not affected to ensure proper visibility in the night. Wherever legends and colour bands are indicated, their location should be such that they are easily visible from tlvorfground level during day time and extra illumination should be provided over them for night time or wherever visibility is poor.

mm
20 Above 30 .. " 50 80 to to .. 30 50 80

mm
10 20 30 40 63 90

.. 150 ,,250

,,150 Over 250

9.2 Direction of Flow Where it is required to indicate the direction of flow, arrows or letters may be painted near valves, junctions, walls, etc, and at suitable intervals along the pipe, in a manner best suited to local conditions (see Fig. 3). These shall be black or white in colour and in. contrast to the colour on which they are superimposed. If a label or badge with a codified indication is

WALL HAZARD MARKING HAZARD MARKING

!CZHsCq Omin. Dmin. 0

FIG. 5

HAZARD MARKING ( FLUID CARRIED, ETHYL CHLOLIDE)

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IS 2379 : 1990

20

95

6A

For Pipes DN 200 and Below

30

50

'25

68

For Pipes Above DN 200

FIG. 6 SIZE OF ARROWS

FIG.
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POSITIONING OF MARKINGS FOR VISIBILITY

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Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promote hannonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country,

Copyright
BIS has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director (Publications), BIS. Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed periodically; a standard along with amendments is reaftinned when such review indicates that no changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of 'BIS Handbook' and 'Standards: Monthly Additions'. This Indian Standard has been developed from Doc: No. HMD 17 (5222)

Amendments

Issued Since Publication Text Affected

Amend No.

Date of Issue

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OF INDIAN

STANDARDS

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