ASTM E1379-90(2016)

Standard Specification for Laboratory Glass Dewar Flask

ABSTRACT
This specification provides the material and performance requirements for glass Dewar flasks suitable for general laboratory use. Flasks shall be made of Type I, Class A borosilicate glass conforming to specified maximum residual thermal stress. The properties to which the flasks shall conform are appearance, design, capacity, and dimensions.
SCOPE
1.1 This specification provides standard material and performance requirements for glass Dewar flasks suitable for general laboratory use.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

General Information

• Status: Historical
• Publication Date: 31-Aug-2016
• ICS: 71.040.20 - Laboratory ware and related apparatus
• Technical Committee: E41 - Laboratory Apparatus
• Drafting Committee: E41.01 - Laboratory Ware and Supplies

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:E1379 −90 (Reapproved 2016)
Standard Specification for
1
Laboratory Glass Dewar Flask
This standard is issued under the fixed designation E1379; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Material and Annealing
4.1 Flasksshallbemadeofborosilicateglassconformingto
1.1 This specification provides standard material and per-
the requirement of Type I, Class A, Specification E438.
formance requirements for glass Dewar flasks suitable for
general laboratory use.
4.2 Maximum residual thermal stress shall conform to
Specification E671.
1.2 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
4.3 Aluminum base alloy metal shall conform to Alloy
standard.
Number A380 of Specification B85.
5. Appearance
2. Referenced Documents
5.1 The general appearance of the flasks shall conform to
2
2.1 ASTM Standards:
Fig. 1.
B85Specification for Aluminum-Alloy Die Castings
E438Specification for Glasses in Laboratory Apparatus
6. Design
E671Specification for Maximum Permissible Thermal Re-
6.1 Flasks shall be cylindrically shaped and have double
sidual Stress in Annealed Glass Laboratory Apparatus
walls silvered on the inside. The space between the walls shall
−7
be evacuated to a vacuum level of 5×10 Torr and sealed.
3. Classification
Temperatures are to be held in excess of 500°C during
evacuation.
3.1 Glass Dewar flasks shall be of the following sizes: 265
mL, 665 mL, 1000 mL, 1900 mL, 4300 mL
6.2 Flasks shall be firmly cemented into the base to protect
the sealing tip.
NOTE 1—The term millilitre (mL) is commonly used as a special name
3
for the cubic centimetre (cm ) and similarly the litre (L) for 1000 cubic
6.3 Flasks shall have a protective plastic mesh, or shall be
centimetres, in accordance with the International System of Units (SI).
coated with a baked-on plastisol over exposed glass surface.
7. Capacity and Dimensions
1
7.1 Standard Dewar flasks for government use shall con-
This specification is under the jurisdiction of ASTM Committee E41 on
Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on
form to the requirements of Table 1.
Laboratory Ware and Supplies.
7.2 Other Dewar flasks (not found in Table 1) are appr
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E1379 − 90 (Reapproved 2010) E1379 − 90 (Reapproved 2016)
Standard Specification for
1
Laboratory Glass Dewar Flask
This standard is issued under the fixed designation E1379; 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
1.1 This specification provides standard material and performance requirements for glass Dewar flasks suitable for general
laboratory use.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
2. Referenced Documents
2
2.1 ASTM Standards:
B85 Specification for Aluminum-Alloy Die Castings
E438 Specification for Glasses in Laboratory Apparatus
E671 Specification for Maximum Permissible Thermal Residual Stress in Annealed Glass Laboratory Apparatus
3. Classification
3.1 Glass Dewar flasks shall be of the following sizes: 265 mL, 665 mL, 1000 mL, 1900 mL, 4300 mL
3
NOTE 1—The term millilitre (mL) is commonly used as a special name for the cubic centimetre (cm ) and similarly the litre (L) for 1000 cubic
centimetres, in accordance with the International System of Units (SI).
4. Material and Annealing
4.1 Flasks shall be made of borosilicate glass conforming to the requirement of Type I, Class A, Specification E438.
4.2 Maximum residual thermal stress shall conform to Specification E671.
4.3 Aluminum base alloy metal shall conform to Alloy Number A380 of Specification B85.
5. Appearance
5.1 The general appearance of the flasks shall conform to Fig. 1.
6. Design
6.1 Flasks shall be cylindrically shaped and have double walls silvered on the inside. The space between the walls shall be
−7
evacuated to a vacuum level of 5 × 10 Torr and sealed. Temperatures are to be held in excess of 500°C during evacuation.
6.2 Flasks shall be firmly cemented into the base to protect the sealing tip.
6.3 Flasks shall have a protective plastic mesh, or shall be coated with a baked-on plastisol over exposed glass surface.
7. Capacity and Dimensions
7.1 Standard Dewar flasks for government use shall conform to the requirements of Table 1.
7.2 Other Dewar flasks (not found in Table 1) are approved for use if they meet all of the design criteria found in Section
...