Fire Resistance Testing analysis: Insights into UL 263 and ASTM E119

 

UL 263, also known as the Standard for Wall Insulation, is a test standard developed by Underwriters Laboratories, U.S.A. UL 263 is mainly used to evaluate the fire resistance of building walls, and the test object is the structural materials of the building, including walls, floors and ceilings. Samples are heated on one side and cooled on the other, and their resistance to fire is evaluated by measuring the protection properties of the material and the time it takes. ul 263 classifies materials according to their burning characteristics into six flame spread classes: F, FH, A, B, C, and D. F is the best class, and D is the worst.

ASTM E119, also known as the Standard Flame Test, is a test standard introduced by ASTM International.ASTM E119 is primarily used to evaluate the fire resistance of building structures, such as walls, roofs and floors. The test is conducted using a standard flame alternative, where samples are placed below deck and continuously exposed to high temperatures, and parameters such as temperature control and time of day are measured to assess the fire resistance of the material. Based on the test results, the ASTM E119 standard categorizes building construction materials into a number of classes, including one-, two-, three- and four-hour flame resistance classes.

 

It should be noted that the test methods and evaluation criteria of UL 263 and ASTM E119 are slightly different, but they are both widely used to evaluate the fire resistance of building structures. Selection of the appropriate test method should be based on specific application scenarios, requirements and standards.

 

 

1. Limitations on thermal radiation: UL 263 tests have relatively low limitations on thermal radiation, while ASTM E119 tests require materials to have certain limitations on thermal radiation during flame exposure.

 

2. Different types of components: UL 263 is primarily used to evaluate the fire resistance of components such as walls, floors, and ceilings, while ASTM E119 covers a wider range of building construction materials, including walls, roofs, floors, doors, and windows.

 

3. Different certification organizations: UL 263 is tested and certified by Underwriters Laboratories, while ASTM E119 is tested and certified by various laboratories according to ASTM International standards. 4.

 

4. Differences in evaluation time: UL 263 evaluates materials for a relatively short period of time, typically one to four hours, while ASTM E119 evaluates materials for a much longer time frame and can achieve fire resistance in excess of four hours.

 

It is important to note that both the UL 263 and ASTM E119 test methods are designed to evaluate the fire resistance of building construction materials under fire conditions. When selecting the appropriate test method, the choice should be based on the specific application needs, relevant standards and requirements, and to ensure that the material complies with local building codes and safety standards. In addition, other factors need to be considered in the assessment of the fire resistance of a building, such as the way in which the material is installed, the integrity of the elements and fire separation.