Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS/ISO 8573-1 (2001): Compressed air, Part 1: Contaminantsand purity classes [MED 22: Compressor, Blowers andExhausters]

October 2008

15/150 8573-1 : 2001[Superseding IS 14642 (PM 1) : 1e11]

Indian Standard

COMPRESSED AIRPART 1 CONTAMINANTS AND PURITY CLASSES

ICS 71.100.20

C BIS 2008

BUREAU OF INDIAN STANDARDSMANAK BHAVAN. 9 BAHADUR SHAH ZAFAR MARG

NEWDELHI 110002

Price Group 5

Compressors, Blowersand Exhausters Sectional Committee, MED22

NATIONAL FOREWORD

This Indian Standard (Part 1) which is identicalwith ISO 8573-1 : 2001 'Compressed air - Part 1:Contaminants and purity classes' issued by the International Organization of Standardization (ISO) wasadopted by the Bureau of IndianStandards on recommendation of theCompressors.Blowersand ExhaustersSectional Committeeand approvalof the MechanicalEngineeringDivision Council.

ThisstandardsupersedesIS 14642 (Part1) : 1999 'Compressedair for generaluse:Part 1 Contaminantandqualityclasses' which was technically equivalentto ISO 8573-1 : 1996,

The text of ISO Standard has been approved as suitable for publication as an Indian Standard withoutdeviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention isparticularlydrawnto the following:

a) Wherever the words'International Standard'appear referringto this standard,they shouldbe readas'IndianStandard'.

b) Comma(,)has been usedas adecimalmar1<er in the International Standardwhile in IndianStandards,the currentpractice is to use a point (.) as the decirnal marker.

Inthisadoptedstandard, reference appearsto the followingInternationalStandardfor which Indian Standardalsoexists.The corresponding IndianStandardwhich is to be substitutedin its place is listedbelowalongwithits degreeof equivalence for the edition indicated:

Intemational Standard

ISO8573-2 : 1996 Compressed air forgeneraluse - Part 2: Text methodsfor aerosoloil content

Corresponding Indian Standard

IS 14642 (Part 2) : 1999 Compressedair: Part 2 Testmethods for oil aerosolcontent

Degree of Equivalence

Identical

Thetechnicalcommittee has reviewedthe provisionsof the following InternationalStandardsreferred in thisadoptedstandardand has decidedthat they are acceptable for use in conjunction with this standard:

Intemational Standard

1507183

ISO8573-3 : 1999

ISO8573-4 : 2001

ISO8573-5 : 2001

Title

Compressedair dryers - Specifications and testing

Compressedair - Part 3: Test methods for measurement of humidity

Compressedair - Part 4: Test methods for solid particle content

Compressed air - Part 5: Determination of oil vapour and organic solventcontent

Technical Corrigendum1 to the above InternationalStandard has been given at the end of this publication.

For the purpose of deciding whether a particular requirement of this standard is complied with, the finalvalue.observedor calculated,expressingthe resultof a test or analysis. shall be rounded off in accordancewithIS2 : 1960'Rulesfor roundingoff numerical values (revised)' , The number of significant places retainedin the roundedoff value should be the same as that of the specified value in this standard.

ISIISO 8573-1 : 2001

Indian Standard

COMPRESSED AIRPART 1 CONTAMINANTS AND PURITY CLASSES

1 Scope

This part of ISO 8573 specifies purity classes of compressed air in respect of particles, water and oil regardless ofthe source of the compressed air.

This part of ISO 8573 identifies microbiological and gaseous contaminants.

The gaseous contaminants included in this part of ISO 8573 are carbon monoxide, carbon dioxide, sulfur dioxide, ni­trogen dioxide, nitric oxide and hydrocarbons with carbon atoms in the range C1 to Cs'

NOTE Other contaminants are taken into consideration for specific applications, e.g. air used for breathing, medical, food andbeverage purposes.

2 Normative references

The following normative documents contain provisions which, through reference in this text, constitute provisions ofthis part of ISO 8573. For dated references, subsequent amendments to, or revisions of, any of these publications donot apply. However, parties to agreements based on this part of ISO 8573 are encouraged to investigate the possi­bility of applying the most recent editions of the normative documents indicated below. For undated references, thelatest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currentlyvalid International Standards.

ISO 7183, Compressed air dryers - Specifications and testing.

ISO 8573-2, Compressed air for general use - Part 2: Test methods for aerosol oil content.

ISO 8573-3, Compressed air - Part 3: Test methods for measurement of humidity.

ISO 8573-4, Compressed air - Part 4: Test methods for solid particle content.

ISO 8573-5, Compressed air - Part 5: Determination of oil vapour and organic solvent content.

3 Terms and definitions

For the purposes of this part of ISO 8573, the terms and definitions given in ISO 7183 and the following apply.

3.1aerosolsuspension in a gaseous medium of solid particles, liquid particles or solid and liquid particles having negligible fall­velocity/settling-velocity

3.2agglomerategroup of two or more particles combined, joined or formed into a cluster by any means

1

ISIISO 8573-1 : 2001

3.3dewpointtemperature at which water vapour begins to condense

3.4microbiological organismsviable colony lorming units which may be a bacteria . lung l or yeasts

3.5oilmixture of hydrocarbons composed 01 6 or more carbon atoms (e6)

3.6particlea small discrete mass of solid or liquid matter

3.7particle sizedlength 01 the greatest distance between two external boundaries.

3.8relatiwl ..ter vapour pressurerelative humidityratio 01 the partial pressure of water vapour to Its saturation pressure at the same temperature

3.9vapourgas which is at a temperature below its critical temperature and which therefore can be Iiquel ied by isothermal com­pression

4 Measurement of contaminants

For the purpose of assess ing the PUrityclass 01 a comp ressed air sample . measurements shall be made ," accord­ance with the appropriate part 01 ISO 8573:

Part 2 lor measuring oil aerosols and at! liquid content of compressed air ;

Part 3 lor measuring humidity;

Part 4 for measuring solid part icles;

Part 5 lor measuring OIl vapour and organic solvent content;

Further parts of ISO 8573 are under preparation lor measuring gaseous contaminant conte nt (part 6). lor deterrrun­Ing viable microbIOlogICal contaminant content (Part 7) and lor measuring solid part icles (Part 8) and liquid watercontent (Part 9). In their absence. other recognized standards shall be used lor the measurement of the various can­tammants. II possibte. and the lollowing rules apply:

measurements shall be based on a number of samples taken dunnq a suitable length of time;

measurements should be carried out at the actual operating pressure and temperature;

the purity classes 01 a compressed air system should be based on the mean value 01an agreed number 01 meas­urements (see note) :

the purity classes are relevant Oflly at the point 01 measurement (see note) .

The content of partICles. water and OIl in compressed air varies due to sudden changes in the intake air. to the wear01components as well as to changes In How. pressure. temperature and ambient conditions .

2

ISIISO 8573-1 : 2001

It IS not pos sible to measure ttl e full flow area of a compressed all str eam uSing most test methods a"d ltle,,,lo,e It 1$

necessary 10 take samples ot !t ,e a ir Car e snoutu be exercsec 10 ens ure that the samp le taken .s rppresen:at lvt! otthe com pressed al l punty.

NOTE Mea su rements sho uld be cameo out at the aclual ope rating concu.ons as otherw ise the balance belwE'en Impulllle~ ,n IIQ'uid, ae rosol or gaseous form Will be anereo Liquid 0,1 an d free water rn particu lar lend 10 cling to pope and tub<' wall s where t~lorm a ntm or thin rivul ets

5 Standard atmosphere

Reference conditions tor volume statements shall be as spec ified In Table 1.

Table 1 - Reference conditions

Air temperature '20 C-- - --- ~--_._----- -- _._-- - --- --- , . _"_0>

Air pressure 1 bar a absolu te.. ... ..-- -- ----------10- ---'".. ..- -----.-. -.. .. .. --... --.

Relative water vapour pre ssurea 1 bar = 0.1 MPa

6 Contaminants

6.1 General

The thr ee ma jor imp unnes In compressed .ur art' solid par nctes, water and 0 11. They Influe nce each other (e .g . sol idpa rticulate agglomerates In the presence ot oil or water to torm lar ger pa rticles. 011 and water for m an ernutsion ) andare sometimes deposited or co ndense d ( e q 0 11 vap our or water vapour) in side the pipework 01 a compressed airsyst em . Other conta minan ts are also con sidered Inc lud ing microbiolo gical organisms and gaseous contaminants.

6.2 Solid particles

6.2.1 General

So lid part ic le prope rt ies are Important ard are characten zed by de nsrty. shape. size and by hardness

It IS essential 10 ehrrunate the mnuence 0 1 water on pa rt icle size and numbe r In order 10 ob tain a correct reading

6.2.2 Measuring parameters

6.2.2.1 Particle size

Particle size shall be measured in accordance with recognized method s

6.2.2.2 Particle concentration

Co ncentration 0 1 part icles shall be measured In acco rdance with ISO 8573-4 Mass concentranon 01 pa rncies shallbe measured In accordance with a recognized standard (see clause 4)

6.2.2.3 Humidity

The actual hUmidIty level sha ll be measured 10 acc ordance with ISO 8573 -3

3

ISIlSO 8573-1 : 2001

6.3 Water

6.3 .1 General

Atmospheric air always conta ins water vapour . When atmospheric air is compressed the partial pressure of the watervapour Increases but, owing to the increase In temperature caused by the compression, no water precipitates. Whenthe air is subsequently cooled (e.g. in an Intercooler or aftercooler, in the distribut ion pipework or during the expan­sion process In a pneumatic tool) water will condense to liquid , but the air will be fully saturated with water vapour.

6.3.2 Measuring parameters

Hum idity measurement shall be in accordance with ISO 8573-3 and for liquid water in accordance with a recognizedstandard (see clause 4) .

6.4 Oil

6.4.1 General

For the purposes of this part 01 ISO 8573 . oil In compressed air can belong to one or more of three categories : liqu id.aeroso l or vapour.

When considerinq 011vapour content 01compressed air It is impor tant to refe rence the temperature as th is affects theratio 01 vapour 10total 011 content.

Testing lor vapour should be earned out in conjunct ion with the test lor aerosols and bulk liqu id so the various phaseconcentrations may be discerned. Due to Ihe complex organic molecules. wh ich may be involved, the calibration pro­cedure of the measurement e~:Jipment shall be clearly stated.

6.4.2 Measuring parameters

6.4 .2.1 Oil liquid. aerosol or vapour

The measurement of 0 11 aerosol and hquid shall be In accordance with ISO 8573·2. The measurement of oil vapourshall be In accordance With ISO 8573-5.

6.4.2.2 Humidity

The actual humidity level shall be measured In accordance with ISO 8573-3.

6.5 Gaseous contaminants

Atmospheric air conta ins not only those common contaminants generally identified for treatment but also gaseouscontaminants which may be present in vary ing amounts depending on location. Concentration 01 gaseous contami­nants shall be measured in accordance With a recognized standard (see clause 4).

6.6 Microbiological organisms

MICrobIOlogICal organisms are generally considered to be solid contaminants. which can be present In the atmos­pherIC air.These orgamsms may be introduced into the compressed air by a numoer of means. If the microbiologicalorgamsm IS to be 1dentTfled as a solid parncle then the measurement method identified in ISO 8573-4 is used. If thecolony forming actiVity 01bactena. fungi or yeasts is Important then this can be identified using a recognized standard(see clause 4).

..

15nSO 8573-1 : 2001

7 Compressed air purity classes

7.1 Solid particle classes

The solid particle classes are defined In Table 2 Values tor classes a to 5 shall be measured In accordance withISO 8573-4 and for classes 6 and 7 In accordance with a recognized standard (see clause 4)

Table 2 - Solid particle classes

Concentration

5t-

10

;Not applicable

!I

-

Particlesize

Particle size, d

Iflm ,

,-,- 0 ,10 ,0,10< ,1 0.5:0,5 "'1_0 :1,0 Ii 5_0 !

Maximum number of particles per mJ I(see clause 5) !

f-----------------------------.----------------'iClass

o As specified by the equipment user or supplier and more stnngent than INotclass 1 [apphcable

1 Not speCified TiOo--.~=-=t _-==--===Jo==~=-=-=-==J2 Not specified i100 000 11 000 !10 :~- I· --.-....--.-...,...~..-~.--~----- .~ - _ .- -t -- -- -. --...----...-,.---.t

3 Not speclfJe3__l Not s~~~led __J~~__?OO__ i500 --14 Not specified iNot specrtied i Not specrtied i1 000 I

5--- N~t spe~lfle"d----'N~t~p~~,f~~d-- tN;t~p~~li~~d--- -t20000--- - ------1-- L J . -4-_

6 Not applicable ;. 5f------- - ,------- -+-7 Not applicable i 40

NOTE A fillrallon rallo " rl'i:lll'd 10,] pailicle size class IS the rano between the number of parnctos ups.uearn of the Illter and

the number of particles dc'wnsfr"dm ThiS can be expressed as [ ,I 1 F'). where l ' IS the penetration 01 the parllcle:-:. ex­pressed as the r.lllO of do\',,, Sfre,1fl1 partl -Ie concentration to upstrr-am parllcle concentration The w;rtlcle Sill' class IS used as

:In 111CJ!', "q 7:) 111,. ,H),. that the number of particles of size 10 I'm (,1 m : and larger IS 75 urnes higher upstream of the+lit',-'r tI~,Hl d()wn~;trf>~Hl!

7.2 Humidity and liquid water classes

The humidity classes are defined m Table 3 and hqurd water classes In Table 4 Values for pressure oewpo.ots shanbe determined accordrnq to ISO 8573-3 and hqurd water content according to a recognized standard (see clause 4)When lower dewpomts are reourred they shall be clearly specrned

Table 3 - Humidity classes

Pressure dewpointClass

C

0 As spec-bed by the equipment user or supplier and more stnngent than class 11-- ----~----_._.__._-~..~_..,-----,------------_.~_ .._-_._- .__.._--,--,-'"---~ ..,._~,_._._-,-

1 70

2 .- --40

3 .> -20--,----- '--'-- ,._._- -----_._._ .._--_._-,~~""--

4 I" -'-3--------------------------

5 <' -'-7---:-::~_._._-~----_ .•.-

6 -,

+10--

5

ISIISO 8573-1 : 2001

Table 4 - Li qui d water classes

Concentration of liqu id water, (~

Classm3

91 i<' ' ., 0 .5

.. _- - - ,-_. .. _- -- --- ----~ .-__.______ _L .,., ------- .._--- -.

8 _ ~ _~: 5 < ('" ~ 5

f ~ •. ._~-_. _ - .. -_.---- - _.- . .9 j5 .. <'", ~ 10

7.3 Oil classes

The oil c lasses are def ined m Table 5. Val ues for all aerosol an d all liquid shall be de ter mined according toISO 8573-2 an d all vapour accord ing to ISO 8573 -5 . Th e co nce ntra tion of total a ll is the sum of these values.

Table 5 - Oil classes

---- - ------_._-

[As speci fied by the equipment user or supplier and mo re strin gen t than class 1i ' - '-'! ~.; 0.01

I ~ 0.1

!< 1I!. 5

!Concentration total oil (aerosol. liqu id , and vapour)

Img / m3

o

Class

1f- - .... - .. -~---------.---_>_---------------.-

2f-.------- - . ... - ...- --- ---+- - - - - - - - - - - ---- .-- - - - --- - - - ---- - -j3

f--- . .- - . -- - - • . - . , • .. - - - - -- -.r--- - - - - - - - - - .---- -- -- - - - - - - - - - - - .---4

7.4 Gases

r he reporting o f ttle leve ls of gas eous contaminant content Incl uded within the scope o f this part 01ISO 85 73 shallbe determined as the ac tual determined value s rn acc ordance With a recoqruzcd standard (see clause 4) .

7.5 Microbiological organisms

Due :0 the co mplex nature of the mvolveme nt of mic rob iological organisms In many types of applica tion the classdr ­calion In th l'i pa rt of ISO 8573 IS limited to a simp le Ident ity ba sed on sterile o r non-sterile apphcatrons . Reporll ng ofthe leve ls o f co ntamina nt content Included Within the scope 01thrs part 01 ISO 85 73 shall be d eterm ined as the actua lde termlr1ed val ues In accordance With a recognize d sta nd ard (se e clause 4 )

7.6 Designation

The oe siqnation of the PUrity class of compressed air at the specified measuri ng POin t shall Include the fo llOWing In.formation .n the orde r give n:

Compressed air purity classes ISO 8573-1 ABC

whe re

A IS the hgure for soitd par ticle classes as measured In accordance With ISO 8573-4 (see 7. 1);

8 IS the fIgu re for humid ity or "qUId wa ter classes as measur ed In accordance with ISO 8573 -3 (see 7 .2):

c 's the f'gure for total oil classes as measured In accordance With ISO 8573 -2 and ISO 8573-5 (see 7.3)

When a class for any parncular contammant A. Bar C is no t specihed, the de signall on shall be rep laced by a hyp hen.

6

Additional qualification ma y be give n on

gaseou s contaminant content (see 7.4 ):

microbiolog ica l con taminant content (see 7.5).

I5nSO 8573-1 : 2001

7

ISIISO 8573-1 : 2001

Bibliography

[ ' ) ISO 3649, Cieernnq eqiuoment for air or other gases - Vocabulary.

[21 ISO 8573-6, Comp ressed sur - Part 6: Determination of content of gaseous contsrtunents.

[3J ISO 8573-7, Compressed air - Part 7: Test methods for viable microbioloq icel contaminant content.

[41 ISO 8573·8, Compressed air - Part 8 : Contaminants and punty classes (by mass concentration of solid parti­cles).

[5) ISO 8573-9, Compressed air - Part 9: Test methods for liquid water content.

[6) PN 14M3, Contsminsnts. pu rity classes and measurement methods' ).

l) PNE URQP Puohcallons avaIlable from PNEUROP Gene ral Secretanat, 33/34 Devonshire Street, London W1N lRF.

8

ISIISO 8573-1 : 2001

CHNICAL CORRIGENDUM 1

hnical Corrigendum 1 to Intemational Standard ISO 8573-1 was prepared by Technical Committee ISOITC 118.'lpressors. pneumatic tools and pneumatic machines, Subcommittee SC 4, Quality of compressed air.

e 5, subclause 7.1

lace the second sentence by the following:

·Values for classes 0 to 5 shall be measured in accordance with ISO 857~ and those for classes 6 and 7 inaccordance with ISO 8573-8."

It 5. subclause 7.2

lace the second sentence by the following:

·Values for pressure dewpoints shall be determined according to ISO 8573-3 and those for liquid watercontent according to ISO 8573-9:

,

ISIISO 8573-1 : 2001

Page 6, subclause 7.6

Replace the list defining A, Band C by the following:

"A is the figure for solid particle classes (see 7.1);

B is the figure for humidity or liquid water classes (see 72):

C is the figure for total oil classes (see 7.3):

10

Bureau of Indian Standards

SIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promoteharmonious development of the activities of standardization. marking and quality certification ofgoods and attending to connected matters in the country.

Copyright

SIS has the copyright of all its publications. No part of the these publications may be reproduced inany form without the prior permission in writing of BIS. This does not preclude the free use, in thecourse of implementing the standard, of necessary details, such as symbols and sizes. type or gradedesignations. Enquiries relating to copyright be addressed to the Director (Publications), BIS.

ReYlew of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards arealso reviewed periodically; a standard alongwith amendments is reaffirmed when such review indicatesthat 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 oredition by referring to the latest issue of 'BIS Catalogue' and 'Standards: Monthly Additions' .

This Indian Standard has been developed from Doc: No. MED 22 (0967).

Amendments Issued Since Publication

Amend No. Date of Issue

BUREAU OF INDIAN STANDARDS

Text Affected

HHdqu.rters :

Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002Telephones : 2323 0131, 23233375, 23239402 Website: www.bis.org.in

Reglon.1 Offices:

Central Manak Bhavan, 9 Bahadur Shah Zatar MargNEW DELHI 110 002

Telephones

{2323761723233841

Eastern

Northern

Southern

Western

1/14 C.IT Scheme VII M, V. I.P. Road. KankurgachiKOLKATA 700 054

SCO 335-336, Sector 34-A, CHANDIGARH 160 022

C.I.T. Campus. IV Cross Road, CHENNAI 600 113

Manakalaya, E9 MIDC, Marol, Andheri (East)MUMBAI 400 093

{23378499,2337 85612337 8626, 2337 9120

{26038432609285

{2254 1216, 2254 144222542519,22542315

{28329295,283278582832 7891, 2832 7892

Branches AHMEDABAD.SANGALORE.BHOPAL. BHUBANESHWAR.COIMBATOAE. FARIDABAD.GHAZIASAD. GUWAHATI. HYDERASAD. JAIPUR. KANPUR. LUCKNOW. NAGPUR.PARWANOO. PATNA. PUNE. RAJKOT. THIRUVANANTHAPURAM.VISAKHAPATNAM.

Printed by the Manager. Govt. of India Press. Faridabad