1、Designation: E 1377 99 (Reapproved 2005)Standard Specification forLaboratory Glass Kjeldahl Flasks1This standard is issued under the fixed designation E 1377; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisio
2、n. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification provides standard dimensional re-quirements for glass Kjeldahl flasks for nitrogen digestionanalysis.2. Refere
3、nced Documents2.1 ASTM Standards:2E 147 Specification for Apparatus for Microdeterminationof Nitrogen by Kjeldahl MethodE 438 Specification for Glasses in Laboratory ApparatusE 671 Specification for Maximum Permissible Thermal Re-sidual Stress in Annealed Glass Laboratory ApparatusE 694 Specificatio
4、n for Volumetric WareE 920 Specification for Commercially Packaged LaboratoryApparatusE 921 Specification for Export Packaged Laboratory Appa-ratusE 1133 Practice for Performance Testing of Packaged Labo-ratory Apparatus for United States Government Procure-mentsE 1157 Specification for Sampling and
5、 Testing of ReusableLaboratory Glassware3. Classification3.1 Ungraduated Flasks, Type I, shall be of the followingcapacities:100 mL300 mL500 mL650 mL800 mL3.1.1 Sizes 10 mL and 30 mL and the Soltys style 30 mL arecovered under Specification E 147 and are not included herein.3.2 Graduated Flasks, Typ
6、e II, shall be of the followingcapacity:800 mL, graduated at 1000 mLNOTE 1The term millilitre (mL) is commonly used as a special namefor the cubic centimetre (cm3) and similarly the litre (L) for 1000 cubiccentimetres, in accordance with the International System of Units (SI).4. Material and Anneali
7、ng4.1 Flasks shall be made of borosilicate glass conforming tothe requirement of Type I, Class A of Specification E 438.4.2 Maximum residual thermal stress shall conform toSpecification E 671.5. Appearance5.1 The general appearance of the flasks shall conform toFig. 1.6. Design6.1 Necks on all flask
8、s shall be circular in cross section, andshall be perpendicular to center of flask body.6.2 Top finish of flask shall not be belled over 2 in. from thetop. Top shall be tooled or beaded.6.3 Interior neck finish of sizes 500 and 800 mL may betooled to accept special rubber stopper especially made for
9、Kjeldahl flasks.6.4 Bottom of flask shall be hemispherical in shape, whiletop has a curved taper to point of junction with the flask neck.(See Fig. 1.)6.5 Wall thickness of flasks shall be controlled in accor-dance with Table 1.7. Volumetric Accuracy7.1 Tolerance on volumetric accuracy of Type II fl
10、asks shallbe in compliance with Specification E 694 (10006 1.5 mL).8. Capacity and Dimensions8.1 The nominal capacity of the ungraduated, Type I flasksshall not exceed the actual capacity to the base of the neck. The1000 mL graduated flask capacity ring shall be within the neckof the flask. Dimensio
11、ns shall conform to the requirements ofTable 1.1This specification is under the jurisdiction of ASTM Committee E41 onLaboratory Apparatus and is the direct responsibility of Subcommittee E41.01 onApparatus.Current edition approved May 1, 2005. Published October 2005. Originallyapproved in 1990. Last
12、 previous edition approved in 1999 as E 137799.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright AST
13、M International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.9. Markings9.1 Each flask shall be permanently marked with the nameor known trademark of the manufacturer and the nominalcapacity for Type I flasks and actual capacity for Type II flasks.9.2 There sh
14、all be an area on one side of the flask neck formarking with a pencil.10. Sampling10.1 Refer to Specification E 1157.11. Sampling11.1 Select from Specifications E 920, E921, and E 1133.12. Keywords12.1 flasks; glass; kjeldahlASTM International takes no position respecting the validity of any patent
15、rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at
16、any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments
17、 will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by
18、 ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail)
19、; or through the ASTM website(www.astm.org).FIG. 1 Glass Kjeldahl FlasksTABLE 1 Capacity and Dimensions for Glass Kjeldahl FlasksNominalCapacity(mL)Body ODmax (mm)Body WallThicknessmin (mm)Neck ODmax (mm)StopperSizeOverallHeight max(mm)100 60 0.8 23 1 or 2 214300 82 0.8 28 5 310500 103 0.8 34 6 orA327650 108 0.8 34 6 327800 119 0.8 36 7 orA369AStoppers specially made for Kjeldahl flasks.E 1377 99 (2005)2
