ASTM E671-98(2010)

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Designation:E671 −98(Reapproved 2010)
Standard Specification for
Maximum Permissible Thermal Residual Stress in Annealed
Glass Laboratory Apparatus
This standard is issued under the fixed designation E671; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope cation is to limit the residual stresses for safe consumer use in
annealed glass, as it leaves the manufacturer.
1.1 This specification covers a limit for thermal residual
stress in reusable annealed glass laboratory apparatus as 1.5 Stresses introduced by thermal expansion differences
determined by prescribed photoelastic measurement proce- within the glassware are covered by this specification. Graded
dures. and glass-to-metal seals are excluded.
1.2 In broad classification, the laboratory glassware items
2. Referenced Documents
covered by this specification, but not limited to, are:
2.1 ASTM Standards:
beakers Imhoff cones
E1157 Specification for Sampling and Testing of Reusable
bottles, aspirator impingers
bottles, dropping jars, battery
Laboratory Glassware
bottles, gas washing jars, bell
E1273 Specification for Color Coding of Reusable Labora-
bottles, infusion jars, chromatography
tory Pipets
bottles, milk test jars, cylindrical
bottles, reagent joints, ball and socket or standard taper
F218 Test Method for Measuring Optical Retardation and
bottles, weighing manometers
Analyzing Stress in Glass
bulbs, absorption percolators
bulbs, leveling pycnometers
3. Stress Limit
bulbs, sampling stopcocks
burets tubes, centrifuge
3.1 The stress as measured by the procedure in Section 4
condensers tubes, chromatography
crystallizing dishes tubes, color comparison (turbidity) and calculated by Eq 2 shall not exceed 5.2 MPa (750 psi),
culture dishes tubes, combustion (ignition)
except for combustion, centrifuge, and chromatography tubes,
custom apparatus tubes, connecting and adapter
for which a limit of 4.5 MPa (650 psi) applies. Ware exceeding
cylinders, graduated tubes, digestion
and plain tubes, drying these limits shall be rejected or reannealed to meet the
desiccators tubes, fermentation
specification.
extraction tubes tubes, thistle (spray traps)
flasks vapor traps
4. Measurement Procedure
fritted ware viscometers
funnels watch glasses
4.1 Using a Friedel (Senarmont) polarimeter as described in
generators, Kipp
Test Method F218, place the glass article to be measured in the
grinder, tissue
viewing field in air. Examine every part of the article with a
1.3 This specification recognizes that photoelastic measure-
definable light path (glass dimension) by rotating the analyzer
ments are proportional to the difference of the principal
to compensate for local stress birefringence. Document those
stresses. The limit imposed represents a safety factor to cover
zones showing the higher values for the retardation or thick-
a situation in which one of the principal stresses may be larger
ness ratios by recording analyzer angle, glass thickness (light
than the apparent stress.
path), and position in ware.
1.4 This specification applies only to annealed glassware
4.2 In some orientations, such as sighting perpendicular to
that is intended for sale as such. It excludes glassware that has
the axis of a thin-walled cylinder, two glass paths must be
been thermally tempered, ion-exchanged, or laminated with
included in the measurement. If by rotating the cylinder, the
glass layers of differing expansion. The intent of this specifi-
retardation appears to be relatively constant, the measurement
is straightforward and the two walls define the light path. If the
This specification is under the jurisdiction of ASTM Committee E41 on
Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on
Apparatus. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2010. Published April 2010. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1979. Last previous edition approved in 2004 as E671 – 98 (2004). Standards volume information, refer to the
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