ASTM C550-03

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

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.
SCOPE
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 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: 09-Apr-2003
• ICS: 91.100.60 - Thermal and sound insulating materials
• Technical Committee: C16 - Thermal Insulation
• Drafting Committee: C16.32 - Mechanical Properties

Relations

• Replaces: ASTM C550-95(2001) - Standard Test Method for Measuring Trueness and Squareness of Rigid Block and Board Thermal Insulation
• Effective Date: 10-Apr-2003
• Replaced By: ASTM C550-03(2009) - Standard Test Method for Measuring Trueness and Squareness of Rigid Block and Board Thermal Insulation
• Effective Date: 01-Nov-2009
• Referred By: ASTM C578-22 - Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation
• Effective Date: 10-Apr-2003
• Referred By: ASTM C1289-23 - Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board
• Effective Date: 10-Apr-2003
• Referred By: ASTM E1730-19 - Standard Specification for Rigid Foam for Use in Structural Sandwich Panel Cores
• Effective Date: 10-Apr-2003
• Referred By: ASTM C591-22 - Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
• Effective Date: 10-Apr-2003
• Referred By: ASTM C1126-19 - Standard Specification for Faced or Unfaced Rigid Cellular Phenolic Thermal Insulation
• Effective Date: 10-Apr-2003

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:C550–03
Standard Test Method for
Measuring Trueness and Squareness of Rigid Block and
1
Board Thermal Insulation
This standard is issued under the fixed designation C550; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope properfitandmayaffecttheproductperformanceaswellasthe
appearance of the finished installation.
1.1 This test method covers locations for measuring the
4.2 This test method provides terminology and describes
trueness and squareness of rigid block/board thermal insula-
locations for obtaining consistent measurements of trueness
tion. This test method does not purport to address the variabil-
and squareness of blocks and boards.
ity in board thickness. Thickness is addressed in other ASTM
standards.
5. Apparatus
1.2 The values stated in inch-pound units are to be regarded
5.1 Straightedge, minimum length equal to the maximum
as the standard. The values given in parentheses are for
dimension of the block or board with a maximum out of
information only.
trueness of 6 0.003 in./ft (60.25 mm/m).
1.3 This standard does not purport to address all of the
5.2 Rigid Ruler, graduated to 0.03 in. (1.0 mm) or finer.
safety concerns, if any, associated with its use. It is the
5.3 Square, shall have sides at least as long as the longest
responsibility of the user of this standard to establish appro-
side of the block. If the longest side of the block is greater than
priate safety and health practices and determine the applica-
20 in. (500 mm), then the length of the square must be at least
bility of regulatory limitations prior to use.
20 in. (500 mm). The maximum deviation from 90° shall be no
2. Referenced Documents more than 63 min (60.9 mrad).
2
5.4 Flat Surface, large enough to accommodate the block or
2.1 ASTM Standards:
board in its full length and width dimensions, with a trueness
C168 Terminology Relating to Thermal Insulation
of 60.008 in./ft (60.65 mm/m).
C390 Practice for Sampling and Acceptance of Thermal
5.5 Feeler Gage Set, from 0.001 to 0.020 in. (0.03 to 0.50
Insulation Lots
mm).
3. Terminology 5.6 Tape Measure, steel, long enough to measure the longest
side of the block, graduated in 0.031 in. (1 mm) intervals.
3.1 Definitions—For definitions of terms used in this test
method, refer to Terminology C168.
6. Test Specimens
3.2 Definitions of Terms Specific to This Standard:
6.1 The test specimens shall be of commercial size.
3.2.1 squareness—the lack of deviation from a right angle.
6.2 The number of test specimens shall be defined by the
3.2.2 trueness—the lack of deviation from straightness or
appropriate product specification.
flatness.
6.3 When the appropriate product specification does not
4. Significance and Use
cover sampling, samples shall be selected in accordance with
Criteria C390 inspection requirements.
4.1 Insulating blocks or boards that are not true or square
may not fit properly. Extra labor may be required to obtain
7. Procedure
7.1 Edge Trueness in the x/y Direction:
1
This test method is under the jurisdiction ofASTM Committee C16 onThermal
7.1.1 With the straightedge next to the block/board on the
Insulation and is the direct responsibility of Subcommittee C16.32 on Mechanical
flat surface, concave deviation from true shall be determined at
Properties.
the point of maximum deviation (see Fig. 1 A and B).
Current edition approved April 10, 2003. Published June 2003. Originally
published in 1964. Last previous edition C550 – 95 (2001). DOI: 10.1520/C0550-
7.1.2 For convex deviation from true, the deviation shall be
03.
measured by equalizing the distance between the straightedge
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
and the block/board at both corners of the block/board (see Fig.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
1 A and B).
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C550–03
A. (Side View) B. (Top View)
A. (Top View) B. (Top View)
FIG. 2 Squareness
FIG. 1 Edge Trueness
7.3.2 With the square resting on the flat surface, determine
the deviation from square to the nearest 0.03 in. (1.0 mm) for
all four edges at the point of maximum deviation.
7.4 Corner Squareness:
7.4.1 For corner squareness, the square shall be placed
against the long edge as in Fig. 2B.
7.4.2 Determine the dev
...