ASTM E1293-02

Standard Specification for Glass Measuring Pipets

SCOPE
1.1 This specification covers requirements for glass measuring pipets of precision and general purpose grades, used in measuring volumes of liquids.

General Information

• Status: Historical
• Publication Date: 09-Oct-2002
• ICS: 71.040.20 - Laboratory ware and related apparatus
• Technical Committee: E41 - Laboratory Apparatus
• Drafting Committee: E41.01 - Laboratory Ware and Supplies

Relations

• Replaces: ASTM E1293-94(1998) - Standard Specification for Glass Measuring Pipets
• Effective Date: 10-Oct-2002
• Replaced By: ASTM E1293-02(2007) - Standard Specification for Glass Measuring Pipets
• Effective Date: 01-Nov-2007
• Referred By: ASTM D3606-22 - Standard Test Method for Determination of Benzene and Toluene in Spark Ignition Fuels by Gas Chromatography
• Effective Date: 10-Oct-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E 1293 – 02
Standard Specification for
1
Glass Measuring Pipets
This standard is issued under the fixed designation E 1293; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope Class A pipets. These pipets need not be marked with their
class designation or serial number. See Table 1 for tolerances
1.1 This specification covers requirements for glass measur-
and dimensional requirements.
ing pipets of precision and general purpose grades, used in
3.1.2 Style 2—Long taper tip (Class B only).
measuring volumes of liquids.
3.1.3 Capacities, (mL)—0.1, 0.2, 0.5, 1, 2, 5, 10, 25, and 50.
2. Referenced Documents
4. Design
2.1 ASTM Standards:
2
4.1 Shape—The pipets shall be straight and of one-piece
E 438 Specification for Glasses in Laboratory Apparatus
2 construction. Any cross section of a pipet taken in a plane
E 542 Practice for Calibration of Volumetric Apparatus
perpendicular to the longitudinal axis shall be circular.
E 671 Specification for Maximum Permissible Thermal Re-
2 4.2 Delivery Tips—Delivery tips of Style 1 pipets shall be
sidual Stress in Annealed Glass Laboratory Apparatus
2
made with a gradual taper of 15 to 30 mm for capacities up to
E 694 Specification for Volumetric Ware
5 mL inclusive, and 20 to 40 mm for 10 to 50 mL capacity
E 920 Specification for Commercially Packaged Laboratory
2
pipets. Style 2 pipets shall have a taper at a distance of 50 to 65
Apparatus
mm from the tip end. The end of the tip shall be perpendicular
E 921 Specification for Export Packaged Laboratory Appa-
2
to the longitudinal axis of the pipet. A sudden constriction at
ratus
the orifice shall not be acceptable. The outside edge of the tip
E 1133 Practice for PerformanceTesting of Packaged Labo-
2
shall be beveled slightly at the end, and the bevel shall be
ratory Apparatus United States Government Procurement
ground or firepolished.
E 1157 Specification for Sampling and Testing Reusable
2
4.3 Zero Graduation Line Position— The distance from the
Laboratory Glassware
top end to the top graduation of all pipets (except for 0.5 mL
E 1273 Specification for Color Coding of Reusable Labo-
2 pipets) shall be not less than 90 mm; for 0.5 mL pipets this
ratory Pipets
distance shall be not less than 80 mm.
3. Classification 4.4 Dimensions and Outflow Times—The limiting dimen-
sions and outflow times are shown in Table 1. Outflow times
3.1 Style, Class and Capacity—Pipets covered by this
shall be determined on unplugged pipets using distilled water
specification shall be of the following styles, classes, and
at 256 5°C and by means of a stopwatch. Outflow time shall
capacities:
bedeterminedbytheunrestrictedoutflowofthewaterfromthe
3.1.1 Style 1—Standard taper tip.
zero mark to base mark and until the water has ceased to flow.
3.1.1.1 Class A—Each pipet of precision grade shall be
4.5 Markings—All markings shall be permanent and leg-
marked with the letter “A” to signify compliance with appli-
ible.
cable construction and accuracy requirements in Table 1. Each
4.5.1 Graduation Markings—Graduation lines shall not ex-
pipet may be marked with a permanent serial number at the
ceed 0.4 mm in thickness and shall be in a plane perpendicular
option of the manufacturer.
to the vertical axis of the pipet. The lines and other markings
3.1.1.2 Class B—General purpose pipets are of the same
shall be applied by one of the following methods: etched and
basic design as ClassApipets. Volumetric tolerances for Class
filled with a permanent pigment; etched through a vertical
B pipets shall be within twice the specified range allowed for
colored stripe fused into the glass; by application of a stain
fired into the glass without etching; or by application of an
1
This specification is under the jurisdiction of ASTM Committee E41 on
enamel fired onto the glass without etching.
Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on
4.5.1.1 Style 1, Class A pipets—Shall comply with the
Glass Apparatus.
lengths of lines, numbering and Graduation Pattern 1 specified
Current edition approved Oct. 10, 2002. Published January 2003. Originally
in Specification E 694.
published as E 1293 – 89. Last previous edition E 1293 – 94(1998).
2
Annual Book of ASTM Standards, Vol 14.04.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E1293–02
TABLE 1 Requirements for Glass Measuring Pipets
Capacity Tolerance6 mL Graduations, mL Outside Outflow Time Seconds
Color
Capacity Diameter of
Class A Class B Coding
Main
mL Grad.
...