ASTM E 119 fire resistance report is required for building color steel plates sold to the US market

Use of color steel plates in the construction field:

?Industrial buildings: In industrial buildings such as factory buildings and warehouses, color steel plates are widely used for roofs and walls. Its light weight and high strength make the structural burden of the factory building smaller, and the installation speed is fast, which can greatly shorten the construction period. For example, in some large logistics warehouses, color steel plate roofs and walls can provide good rain, wind and sun protection.

?Civil buildings: Color steel plates are also used in civil buildings such as houses and apartments. For example, in some temporary houses or mobile houses, color steel plates are used as the main building materials to quickly build living spaces. At the same time, in the decoration of the facade of the building, color steel plates can also play a role in beautifying the appearance of the building.

American flame retardant test standards:

ASTM E 119 Standard Test Methods for Fire Tests of Building Construction and Materials

Things to know before ASTME119 testing:

Test equipment and environment:

? Furnace: The furnace used in the test can provide heating conditions that meet the standard requirements and produce a specific temperature curve. The temperature curve is one of the key factors in the test, which specifies the temperature that should be reached at different time points.

? Thermocouple: Used to measure the temperature in the furnace and different parts of the color steel plate. The layout of the thermocouple needs to be strictly in accordance with the standard requirements to ensure the accuracy of temperature measurement.

? Environmental conditions: The test environment needs to be stable to avoid external factors from interfering with the test results.

Test process:

? Sample preparation: Select representative color steel plate samples, and the size and specifications of the samples should meet the requirements of ASTM E119 standard.

? Install the sample: Install the color steel plate sample in the test equipment, ensure that the sample is firmly installed and has good contact with the test equipment to simulate the actual use in the building.

? Heating process: Heat the furnace according to the time-temperature curve specified in the standard to gradually increase the temperature in the furnace. During the heating process, the temperature change of the color steel plate and other related parameters need to be monitored in real time.

Observation and recording: During the test, closely observe the state of the color steel plate, including whether there is deformation, peeling, cracks, etc., and record them. At the same time, record the temperature change of the back-fire surface of the color steel plate, the flame penetration and other information.

Evaluation indicators:

Fire resistance time: The most important evaluation indicator is the time that the color steel plate can maintain its fire resistance under standard fire conditions. For the 2-hour fire resistance test, the color steel plate needs to maintain its structural integrity and thermal insulation (if applicable) within 2 hours, that is, no serious deformation, collapse, flame penetration, etc.

?Fire resistance integrity: Under standard fire resistance test conditions, the ability of building partition components to prevent flames and hot air from penetrating or flames from appearing on the back fire side for a certain period of time when one side is exposed to fire.

Fire resistance and thermal insulation: Under standard fire resistance test conditions, the ability of building partition components to prevent the back fire side temperature from exceeding the specified value for a certain period of time when one side is exposed to fire.