ASTM C550 - 10

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

    Active Standard ASTM C550 | Developed by Subcommittee: C16.32

    Book of Standards Volume: 04.06


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    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. 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    C168 Terminology Relating to Thermal Insulation

    C390 Practice for Sampling and Acceptance of Thermal Insulation Lots


    ICS Code

    ICS Number Code 91.100.60 (Thermal and sound insulating materials)

    UNSPSC Code

    UNSPSC Code 30141500(Thermal insulation)


    DOI: 10.1520/C0550-10

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