Table Of Content

इंटरनेट मानक 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. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 878 (2008): Laboratory glassware - Graduated measuring cylinders [CHD 10: Glassware] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 878: 2008 ISO 4788 :2005 'J.fNrf}4 lfFt¢ ~JI~"<11 ~ ~ ~ ~ - SilQ1 (~~) Indian Standard LABORATORY GLASSWARE - GRADUATED MEASURING CYLINDERS ( Second Revision) res 71.040.20 CBIS2008 BUREAU OF INDIAN STANDARDS MANAK BHAVAN. 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 september2008 PriceGroup4 Glass,Glassware and l,aboratoryware Sectional Committee,CHD 10 NATIONAL FOREWORD ThisIndian Standard (Second Revision) which isidenticalwith ISO4788:2005 'Laboratoryglassware _ Graduated measuring cylinders' issued by the International Organizationfor Standardization (ISO) wasadopted by the Bureau of Indian Standards onthe recommendation ofthe Glass, Glasswareand laboratorywareSectional Committee andapproval ofthe Chemical Division Council. This standard was first published in 1956 and then revised in 1975. During this revision, the Committee felt that it would be more convenient to prepare this standard by adoption of ISO4788 :2005 on dual number basis. Thetextof ISOStandardhasbeen approved as suitablefor publicationasanIndianStandardwithout deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention isparticularlydrawn tothe following: a) Whereverthe words'InternationalStandard' appear referring tothis standard,theyshould be readas'Indian Standard'. b) Comma (,) has been used as a decimal marker, while in Indian Standards, the current practice isto useapoint (.)asthedecimal marker. In this adopted standard, reference appears to certain International Standards for which Indian Standards also exist. The corresponding Indian Standards which are to be substituted in their respectiveplaces arelisted below along withtheirdegree of equivalencefortheeditionsindicated: International Standard Corresponding Indian Stand81d Degree 01 Equivalence ISO 383 : 1976 Laboratory glassware IS 5165 : 1969 Specification for Technically -Interchangeable conical ground interchangeable conical· ground-glass Equivalent joints joints ISO 384 : 1978 Laboratory glassware IS 8729 : 19n Principles of construction do Principles of design and andadjustmentofvolumetric glasawar8 construction ofvolumetric glassware ISO 719 : 1985 Glass - Hydrolytic IS 2313 (Part 1/ Sec 1) : 1994 Grading do resistance of glass grains at 98GC glass alkalinity: Part 1 Hydrolytic Methodoftest andclassification resistance, Section 1Hydrolytic resistance of glass grains at geoC- Method of test andclassification ISO 4794 : 1982 Laboratory glassware IS11469 : 1985Methods for assessingthe do - Methods for assessing the chemical chemical resistance of enamels used for . resistance of enamels used for colour colourcoding andcolourmartdng codingandcolour maoong The tech~icaI committee responsible for thepreparation ofthis standard has reviewedthe pnwisions of followmg International Standald r8ferred in this adopted standard and has decided that it is acceptable for useinconjunction with thisstandard: InternationalStandard Tlfle ISO4787: 1984 Laboratory glassware - Volumetric glaasware - Methods for use and testingofcapacity BIScertificationMarking clause isgiven inNational AmexA. (Continuedon thirdCOIoW) IS 878: 2008 ISO 4788 : 2005 Indian Standard LABORATORY GLASSWARE - GRADUATED MEASURING CYLINDERS ( Second Revision) 1 Scope This lntarnauonal Standard specifies dimensions.material and constructional and metrological requirements ofgraduated measuringcylinders oftallform (Type 1aandType 1b)and of squat form (Type2) Alltypesare suitabte forgenerallaboratory use. The specifications in this International Standard are in conformity With the pnnclples of design and constructionofvolumetric glassware giveninISO384 2 Normative references The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document(including anyamendments) applies. ISO384:1978,Laboratoryglassware - Principles ofdesign andconstructionofvolumetric glassware ISO719, Glass- Hydrolyticresistance ofglassgrainsdt98·C- Method oftestandclassIfication ISO4787, Laboratory glassware - Volumetric glassware - Methods for useandtesting ofcapacity 3 Basis ofadjustment 3.1 Unit of volume Theunitofvolumeshallbetheniillilitre(ml),whichisequivalenttothecubiccentimetre (cmJ). 3.2 Referencetemperature The standard reference temperature, i.e. the temperature at which the cylinder is intended to contain its nominalcapacity,shallbe20·C. When the cylinder is required for use in a country which has adopted a standard reference temperature of 27·C:however,thisvalueshallbesubstituted for20·C 1 IS 878: 2008 ISO 4788 : 2005 4 Typesand classesofaccuracy 4.1 Types Thefollowing three types ofgraduatedmeasuringcylinders arespecified(see Figure1): a) tall(()(TT1with spoutedneck- Type 1a; b) tallf()(TT1 with stoppered neck - Type 1b; c) SQuatform with spouted neck - Type 2. -, ml ml In20'C In20'C 100 = =90 ~-==- 50180 i70 s ml -:=i-ii60 In20·C ~ !!II &40 !3O a ii20 .Jijo £\. <, / 1 1 b) Type1b,Clas.B c) Type2 Key It! overaUheight ", interMIheighttohighest~line 1 hexagonalorcin:ularbase FlgUN1- General fonn.ofgraduatedmeasuringcylinders 4.2 Cl.....ofaccuracy Two ctassesofaccuJacyarespecified: a) ClassAfofthe highergrade (Type 1aandType1bonly); b) ClassBforIttelowergrade. 2 IS 878: 2008 ISO 4788: 2005 5 Series ofcapacities and dimensions The three types of cylinder shall have a senes of nominal capaCities as shown In Table 1 and Table 2 If ':y"ndersofcapacitiesother than lhose listed below arerequired,ItISrecommended that they conform.asfar aspossible.tothe essenhalrequuementsofthis International Standard. Table1- Dimensions.subdivisionsand limitsoferrorforType 1(aand blcylinderw capacity Distancefromtop InterMIheight Nominal Overall Sub- .t10000t ofscaletotopof 10highest Max.pennlalbleerror capacity height divisions graduation cylinder graduation line line hI h2 1ml ml mm mm mm ml ml ClauA ClauS max. min. min max 5 115 20 55 0.1 1,0 0.05 0,1 10 140 20 65 0,2 1," 0.1 0.2 25 170 25 85 0.5 2,5 0.25 0,5 50 200 30 110 1 5 0,5 1 100 260 35 145 1 10 0.5 1 250 335 40 200 2 26 1 2 500 390 45 250 5 50 2.5 5 1000 470 50 310 10 100 5 10 2000 570 50 360 20 200 10 20 Table 2- Dimen.ions.subdivisionsandlimitsoferrorforType2cyllnderw Capacity Distancefrom top InterMIheight Nominal Overall Sub- atlOWftt ofscaletotopof tohighest .....petm'-'bleerror· capacity height division. gr.duatlon cylinder graduation line line hI hz ml mm mm mm ml ml iml max min. min. mix. 5 60 25 30 0.5 1 0,2 10 100 30 40 1 2 0,3 25 125 30 65 1 5 0.5 50 150 30 90 1or2 10 1 100 170 35 90 2 12 1 250 220 35 125 5 30 2 500 255 50 160 10 60 5 1000 295 50 190 20 100 10 2000 345 50 240 50 200 20 a Thesema",ml,OTlpennlsSlbleerrorscorrespondtoaccuracyC"'ssB",acx:on:s.ncewrltllSO3&4. 6 Definition ofcapacity The capacity of a graduated measuring cylinder is defined as the volume of water at 20'C, expressed in millihtres. contained by the cylinder when f~led to the highest graduation line. Where, exoeptionafly. the referencetemperatureis27·C,thisvalue shall be substitutedfor20·C. Selting themeniscusshall be performedaccording toISO4787. The meniscus is set so that the plane of the top edge of the graduation line is horizontally tangential to the lowestpointofthemeniscus.theline ofsightbeinginthe same plane. 3 • IS 878: 2008 ISO 4788 : 2005 7 Maximum permissible error Maximumpermissible errors incapacityshall not exceed the values specified in Table 1for Type 1cylinders, andInTable2for Type2cylinders. These errors represent the maximum permissible error at any point on the scale, and also the maximum perrnrssibledifferencebetweentheerrorsatanytwopoints. 8 Material The cylinders shall be manufactured from glass of hydrolytic class not lowerthan HGB3 in a~cordance with ISO719.Theglass shall be asfree as possible from visible defects, and steps shall be taken Inmanufacture toensure thatitisreasonably freefrom internal stress, 9 Construction and form 9.1 Wall thickness The cylinders shall be sufficiently robust in construction to withstand usual laboratory usage, and the wall thicknessShallshownogross departure from uniformity. 9.2 Stability Thecylinders shall stand verticallywithoutrocking or spinning when placedon alevelsurface.Theyshallnot topple when placed empty (Without stopper, if provided) on a surface inclined at an angle of 15° to the horizontal. 9.3 Base Thebasemaybeintegral,of glass.or itmay be detachable, of asuitable plastics or othermaterial, and may beeitherhexagonal orofother form provided thecylinder satisfiestherequirementsof9.2. 9.4 Rim and spout 9.4.1 The rim of the cylinder shall be fire-polished and shall liein a plane at right angles to the axis of the cylinder. 9.4.2 The spout of aType 1aspouted cylinder shall be so formed asto enablethe contents ofthe cylinder tobepoured outinanarrowstream without spilling orrunning down theoutsideofthecylinder. 9.5 Neckand stopper OnaType1bstoppered cylinder, the neck shall beground to a suitable socketsize,preferablyselected from ISO383. A well-fitting stoP'?Elr of glass or suitable inert plastics material shall be supplied. If individually ground stoppersaresupplied,eachstopper,andthecylinderitfits,shall bemarkedwith anidentifICationnumber. 9.6 Dimensions Type1(a and b) cylinders shall comply'with the dimensional requirements given in Table 1. In the case ofa stoppered cylinder,the ·overaHheighr shall be considered to be the height to the base of the ground neck (seeFigure 1.Type 1b). Type2cylinders shallcom.pIywiththe dimensionalrequirementsgiven inTable2. 4 IS878: 2008 ISO4788 : 2005 10 Graduation and figuring 10.1 Graduation The graduation of all cylinders within this specifICationshall be in accordance with ISO 384:1978,Clause 9. Graduation pattern II in the case of ClassAcylinders and Graduation pattem III inthe cases of Class Sand Type2 measuringcylinders. 10.2 Figuring Figuring shallbeinaccordancewith ISO384:1978,104. 11 Accuracy testing Testing ofcapacityand accuracyshallbeperformed inaccordancewith ISO 4787. 12 Marking 12.1 Thefollowingshallbepermanentlymarked oneach cylinder: a) numberindicatingthenominalcapacity; b) thesymbol "rnl" or"cm3"toindicate theunitofvolume; The 1000ml and 2000ml cylinders may, if desired, be inscribed in terms of the litre in place of the millilitre. c) the inscription "20·C" to indicate the standard reference temperature (but see 3.2 for a reference temperatureof27"C): d) theabbreviation"tn"to indicate ;hatthecylinder has been adjusted tocontainitsindicatedcapacity; e) forType 1aandType 1bcylinders, theletter"A"or"S"to indicatethe class ofaccuracyand thetolerance inaccordancewithTable 1; f) themakersorvendor's name ormark; g) inthe case of acylinderwith an interchangeable stopper (Type 1b),the size numberof thejoint shall be marked. h) thetype ofglass material,inaccordancewithClause 8. Thepermanence ofmarking maybeassessed bythe test methodsspecified inISO 4794 12.2 An individualidentification number shall be permanentlymarkedoneach ClassAcylinder intended for official verification orcertification, or on the stopper and cylinder in all cases where stoppers are individually ground tofitonly onecylinder. 13 Visibility ofgraduation lines, figures and marking 13.1 Allfigures and marking shall be ofsuchsize and form astobeclearlylegibleunderusual conditions of use. 13.2 The graduation lines. the figures and the marking shall be clearly visible and permanent. under usual conditions ofuse. 5