Low Temperature Test For Fire Hoses

The size and length of the test piece of the pipe section is (100±10) mm. The test piece is placed in a low temperature box, cooled to (-30±2) °C, and kept at a constant temperature for 1 h, and then taken out and placed in a low temperature box with a temperature of (20±5) °C. Under the environment (4 ~ 7) h. After the end of the test period, take out the test piece to check its inner coating, and carry out the adhesion test according to the provisions of 6.4. The test results should meet the provisions of 5.12.