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ASTM C550-03(2009)

ASTM C550-03(2009)

Standard Test Method for Measuring Trueness and Squareness of Rigid Block and Board Thermal Insulation

2010-12-31 /Historical
Superseeded by:
Significance and Use:

Insulating blocks or boards that are not true or square may not fit properly. Extra labor may be required to obtain proper fit and may affect the product performance as well as the appearance of the finished installation.

This test method provides terminology and describes locations for obtaining consistent measurements of trueness and squareness of blocks and boards.


1.1 This test method covers locations for measuring the trueness and squareness of rigid block/board thermal insulation. This test method does not purport to address the variability in board thickness. Thickness is addressed in other ASTM standards.

1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

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.

flatness; rigid thermal insulation; squareness; trueness; Block and board thermal insulation; Flatness; Lack of obliqueness; Obliqueness test; Squareness; Straightedge method; Trueness/squareness
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