• ULC 770

ULC 770

Standard Test Method for Determination of Long-term Thermal Resistance of Closed-Cell Thermal Insulating Foams

Underwriters Laboratories of Canada, 09/08/2009

Publisher: ULC

File Format: PDF

$140.00$280.21


Published:08/09/2009

This procedure defines the long-term thermal resistance (LTTR) of a foam product as the value measured after 5-year storage in a laboratory environment and provides means for its prediction based on an accelerated laboratory test.

This procedure, based on ASTM standard test methods C 1303 and C 518, can be applied to a wide range of preformed as well as field manufactured insulating foams. This procedure estimates the change in the thermal resistivity of insulating foam products by means of slicing and scaling.

This procedure addresses faced and unfaced products without consideration to the effect of facers on the LTTR of the product. This method is not intended for products with impermeable membranes such as those with sheet metal facers which will retain most of their initial R-values.

This test procedure is applicable to cellular plastic insulation manufactured to retain a blowing agent, other than air, for a period longer than 180 days. If the thermal resistivity of a product changes by more than 3 % over this 180 day period, this test procedure shall be applied.

This procedure specifies reference time, sampling and testing requirements and is based on ASTM standard test method C 1303 to determine LTTR for closed-cell foams such as extruded polystyrene, sprayed polyurethane, and polyisocyanurate.

More ULC standard pdf

ULC Subject 706.1

ULC Subject 706.1

STANDARD FOR WOOD FIBRE INSULATING BOARDS FOR BUILDINGS (Bulletin, 12/16/2016)

$113.00 $227.05

ULC 629

ULC 629

Standard for 650 deg. C Factory-Built Chimneys (CAN/ULC-S629:2016)

$132.00 $264.00

ULC Subject 132

ULC Subject 132

STANDARD METHOD OF TESTS FOR EMERGENCY EXIT AND EMERGENCY FIRE EXIT HARDWARE (Bulletin, 11/30/2016)

$129.00 $259.84

ULC Subject 554

ULC Subject 554

Standard for Water Based Agent Fire Extinguishers (Bulletin, 11/25/2016)

$105.00 $211.96