ASTM C550-15

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

SIGNIFICANCE AND USE
4.1 It is possible that insulating blocks or boards that are not true or square will not fit properly. It is possible that extra labor will be required to obtain proper fit and that this could affect the product performance as well as the appearance of the finished installation.  
4.2 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 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.

General Information

• Status: Historical
• Publication Date: 14-Oct-2015
• ICS: 91.100.60 - Thermal and sound insulating materials
• Technical Committee: C16 - Thermal Insulation
• Drafting Committee: C16.32 - Mechanical Properties

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 − 15
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 U.S. Department of Defense.
1. Scope 4. Significance and Use
1.1 This test method covers locations for measuring the 4.1 It is possible that insulating blocks or boards that are not
trueness and squareness of rigid block/board thermal insula- true or square will not fit properly. It is possible that extra labor
tion. This test method does not purport to address the variabil- will be required to obtain proper fit and that this could affect
ity in board thickness. Thickness is addressed in other ASTM the product performance as well as the appearance of the
standards. finished installation.
1.2 The values stated in inch-pound units are to be regarded 4.2 This test method provides terminology and describes
as standard. The values given in parentheses are mathematical locations for obtaining consistent measurements of trueness
conversions to SI units that are provided for information only and squareness of blocks and boards.
and are not considered standard.
5. Apparatus
1.3 This standard does not purport to address all of the
5.1 Straightedge, minimum length equal to the maximum
safety concerns, if any, associated with its use. It is the
dimension of the block or board with a maximum out of
responsibility of the user of this standard to establish appro-
trueness of 6 0.003 in./ft (60.25 mm/m).
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5.2 Rigid Ruler, graduated to 0.03 in. (1.0 mm) or finer.
5.3 Square, shall have sides at least as long as the longest
2. Referenced Documents
side of the block. If the longest side of the block is greater than
2
2.1 ASTM Standards:
20 in. (500 mm), then the length of the square must be at least
C168 Terminology Relating to Thermal Insulation
20 in. (500 mm).The maximum deviation from 90° shall be no
C390 Practice for Sampling and Acceptance of Thermal
more than 63 min (60.9 mrad).
Insulation Lots
5.4 Flat Surface, large enough to accommodate the block or
E177 Practice for Use of the Terms Precision and Bias in
board in its full length and width dimensions, with a trueness
ASTM Test Methods
of 60.008 in./ft (60.65 mm/m).
3. Terminology
5.5 Feeler Gage Set, from 0.001 to 0.020 in. (0.03 to 0.50
3.1 Definitions—For definitions of terms used in this test
mm).
method, refer to Terminology C168.
5.6 Tape Measure,steel,longenoughtomeasurethelongest
3.2 Definitions of Terms Specific to This Standard:
side of the block, graduated in 0.031 in. (1 mm) intervals.
3.2.1 squareness—the lack of deviation from a right angle.
3.2.2 trueness—the lack of deviation from straightness or
6. Test Specimens
flatness.
6.1 The test specimens shall be of commercial size.
6.2 The number of test specimens shall be defined by the
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC16onThermal
appropriate product specification.
Insulation and is the direct responsibility of Subcommittee C16.32 on Mechanical
Properties.
6.3 When the appropriate product specification does not
Current edition approved Oct. 15, 2015. Published December 2015. Originally
cover sampling, samples shall be selected in accordance with
approved in 1964. Last previous edition approved in 2010 as C550 – 10. DOI:
10.1520/C0550-15. Practice C390 inspection requirements.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
7. Procedure
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 7.1 Edge Trueness in the x/y Direction:
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C550 − 15
7.1.1 With the straightedge next to the block/board on the
flat surface, concave deviation from true shall be determined at
the point of maximum deviation (see Fig. 1 A and B).
7.1.2 For convex deviation from true, the deviation shall be
measured by equalizing the distance between the straightedge
andtheblock/boardatbothcornersoftheblock/board(seeFig.
1 A and B).
7.1.3 Deviation from true shall be determined to the nearest
0.03 in. (1.0 mm).
7.2 Edge Trueness in the z (Thickness) Direction:
7.2.1 With the square next to the block/board as shown in
Fig
...

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: C550 − 10 C550 − 15
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 U.S. Department of Defense.
1. 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 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C168 Terminology Relating to Thermal Insulation
C390 Practice for Sampling and Acceptance of Thermal Insulation Lots
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
3. Terminology
3.1 Definitions—For definitions of terms used in this test method, refer to Terminology C168.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 squareness—the lack of deviation from a right angle.
3.2.2 trueness—the lack of deviation from straightness or flatness.
4. Significance and Use
4.1 Insulating It is possible that insulating blocks or boards that are not true or square maywill not fit properly. Extra labor mayIt
is possible that extra labor will be required to obtain proper fit and may that this could affect the product performance as well as
the appearance of the finished installation.
4.2 This test method provides terminology and describes locations for obtaining consistent measurements of trueness and
squareness of blocks and boards.
5. Apparatus
5.1 Straightedge, minimum length equal to the maximum dimension of the block or board with a maximum out of trueness of
6 0.003 in./ft (60.25 mm/m).
5.2 Rigid Ruler, graduated to 0.03 in. (1.0 mm) or finer.
1
This test method is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.32 on Mechanical
Properties.
Current edition approved May 1, 2010Oct. 15, 2015. Published June 2010December 2015. Originally approved in 1964. Last previous edition approved in 20092010
as C550 – 03C550 – 10.(2009). DOI: 10.1520/C0550-10.10.1520/C0550-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM 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
1

---------------------- Page: 1 ----------------------
C550 − 15
5.3 Square, shall have sides at least as long as the longest side of the block. If the longest side of the block is greater than 20
in. (500 mm), then the length of the square must be at least 20 in. (500 mm). The maximum deviation from 90° shall be no more
than 63 min (60.9 mrad).
5.4 Flat Surface, large enough to accommodate the block or board in its full length and width dimensions, with a trueness of
60.008 in./ft (60.65 mm/m).
5.5 Feeler Gage Set, from 0.001 to 0.020 in. (0.03 to 0.50 mm).
5.6 Tape Measure, steel, long enough to measure the longest side of the block, graduated in 0.031 in. (1 mm) intervals.
6. Test Specimens
6.1 The test specimens shall be of commercial size.
6.2 The number of test specimens shall be defined by the appropriate product specification.
6.3 When the appropriate product specification does not cover sampling, samples shall be selected in accordance with Practice
C390 inspection requirements.
7. Procedure
7.1 Edge Trueness in the x/y Direction:
7.1.1 With the straightedge next to the block/board on the flat surface, concave deviation from true shall be determined at the
point of maximum deviation (see Fig. 1
...