High Temperature Test Of Fire Pipes

The length of the test piece of the pipe section is (100±10) mm. The test piece is placed in a constant temperature box, heated to (300±5) °C, and kept at a constant temperature for 1 h, and then taken out and cooled to normal temperature. After the test, take out the test piece and check the inner coating (allowing the appearance of darkening and darkening), the test results should meet the requirements of 5.11.