ULC 770
Original price was: $230.00.$115.00Current price is: $115.00.
Standard Test Method for Determination of Long-term Thermal Resistance of Closed-Cell Thermal Insulating Foams (CAN/ULC S770-15)
Underwriters Laboratories of Canada , 02/01/2015
This procedure, based on ASTM standard test methods ASTM C1303 and ASTM C518, 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 test procedure is applicable to cellular plastic insulation manufactured to retain a gas or mixture of gases, 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 days period, this test procedure shall be applied. This procedure specifies reference time, sampling and testing requirements to determine LTTR for closed-cell foams such as extruded polystyrene, sprayed polyurethane, and polyisocyanurate.
The changes made to this edition of the Standard include clarifications of the terms “base formulation” and “mean temperature”, new Clauses to address the testing of materials thicker than 75 mm and a new section on testing of actual 5 year samples.
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ULC 770
Original price was: $149.50.$74.00Current price is: $74.00.
Standard Test Method for Determination of Long-term Thermal Resistance of Closed-Cell Thermal Insulating Foams
Underwriters Laboratories of Canada , 09/08/2009
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.
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