ASTM D 1155 Standard Test Method for Roundness of Glass Spheres
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ASTM D 1155 Document Information:
Title
Standard Test Method for Roundness of Glass Spheres
ASTM International
Publication Date:
May 10, 2003
Scope:
This test method covers the determination of the percent of true
spheres in glass spheres used for
retroreflective marking purposes and industrial uses.
This test method includes two procedures as follows:
Procedure A, in which the selected specimen is split into two size
ranges or groups prior to
separation into true spheres and irregular particles, and
Procedure B, in which the selected specimen is split into five size
ranges or groups prior to
separation.
In determining compliance with specification requirements, either
Procedure A or Procedure B may be
used. Where tests indicate failure to meet the specified percent of
true spheres and irregular
particles, the referee test shall be made in accordance with Procedure
B.
The values stated in SI units are to be regarded as the standard. The
values given in parentheses
are for information only.
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.
Keywords:
- roundness
- glass spheres
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