ASTM C149-86(1995)

Standard Test Method for Thermal Shock Resistance of Glass Containers

SCOPE
1.1 This test method covers the determination of the relative resistance of commercial glass containers (bottles and jars) to thermal shock and is intended to apply to all types of glass containers that are required to withstand sudden temperature changes (thermal shock) in service such as in washing, pasteurization, or hot pack processes, or in being transferred from a warm to a colder medium or vice versa .  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Dec-1999
• Technical Committee: C14 - Glass and Glass Products
• Drafting Committee: C14.07 - Glass Containers

Relations

• Replaced By: ASTM C149-86(2000) - Standard Test Method for Thermal Shock Resistance of Glass Containers
• Effective Date: 01-Jan-2000
• Referred By: ASTM C224-78(2020) - Standard Practice for Sampling Glass Containers
• Effective Date: 01-Jan-2000
• Referred By: ASTM F2179-20 - Standard Specification for Annealed Soda-Lime-Silicate Glass Containers That Are Produced for Use as Candle Containers
• Effective Date: 01-Jan-2000

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 149 – 86 (Reapproved 1995)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Thermal Shock Resistance of Glass Containers
This standard is issued under the fixed designation C 149; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope dial thermometers should be attached and the temperatures
controlled manually.
1.1 This test method covers the determination of the relative
3.3 The capacity of each tank shall be at least 3.8 L (1 gal)
resistance of commercial glass containers (bottles and jars) to
for each 0.45 kg (1 lb) of glass tested.
thermal shock and is intended to apply to all types of glass
containers that are required to withstand sudden temperature
4. Sampling
changes (thermal shock) in service such as in washing,
4.1 Methods of sampling a minimum lot from a group of
pasteurization, or hot pack processes, or in being transferred
containers of a given type are given in Practice C 224, for the
from a warm to a colder medium or vice versa.
various situations to which it may apply.
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
5. Procedure
only.
5.1 Adjust the temperatures of the baths so that the cold bath
1.3 This standard does not purport to address all of the
is at 21°C (70°F) and the hot bath is at a temperature hotter
safety concerns, if any, associated with its use. It is the
than the cold bath by a specified differential. (In most cases this
responsibility of the user of this standard to establish appro-
differential will be 42°C (75°F) for the first immersion (Note
priate safety and health practices and determine the applica-
1). Fill, or partially fill, the basket, with empty bottles, and
bility of regulatory limitations prior to use.
when the temperatures of the baths are within 6 1.1°C (2°F) of
those specified immerse the basket in the hot bath in such a
2. Referenced Documents
manner that the bottles become completely filled with hot
2.1 ASTM Standards:
2 water, allow to soak for 5 min, transfer to the cold bath, and
C 224 Practice for Sampling Glass Containers
immerse for 30 s, and then remove from the cold bath. Control
2.2 ASTM Adjuncts:
the 5-min immersion in the hot bath within 10 s, and the time
C 149 Apparatus for thermal shock test of glass containers (6
of transfer from the hot to the cold bath shall be 15 6 1s.
Drawings)
During the test, protect the apparatus from drafts in a sheltered
3. Apparatus area. Observe the number of containers failing in the test by
individual inspection of each.
3.1 The apparatus shall consist essentially of a basket for
holding the glassware upright, two tanks, one containing hot
NOTE 1—If a cold bath temperature other than 21°C (70°F) is used, the
water and one containing cold water, and an automatically specified differential may be decreased (increased) by 0.5°C (1°F) for each
increase (decrease) of 5.6°C (10°F) above (below) the recommended cold
timed means for immersing and transferring the basket of
bath temperature.
bottles from the hot to the cold bath. A suitable type of
apparatus is illustrated in Fig. 1.
5.2 Use one of the following test procedures depending
3.2 A device shall be provided to maintain the temperature
upon the purpose of the test.
of the baths within 61.1°C (2°F) of the specified temperatures.
5.2.1 Pass Test—Apply the test at a predetermined differ-
Indicating controllers that control the heating of the ho
...