Identification of the quality of spiral wrap hose protectors
Identification of the quality of spiral wrap hose protectors
The quality of the Spiral Wrap Hose Protectors the main advantages and disadvantages of the following reference standards:
1. Appearance Spiral protective sleeve surface smooth, no shortage of materials, cracks, damage and glitches; no obvious blistering and uneven; no impurities, variegated phenomena such as high-quality produce; the other hand, poor quality, unqualified.
2. The hardness of high quality qualified spiral protective sleeve hardness generally Shaw 85 ~ 90 degrees, hardness of less than 85 degrees or higher than 90 degrees are not meet the requirements.
3. High and low temperature resistance Qualified high-quality spiral protective sleeve should have good resistance to high and low temperature performance. The user can identify the following methods: the spiral protective sleeve in turn placed under 80 ℃ environment 1 hour, 0.5 hours at room temperature, -40 ℃ environment for 1 hour, 0.5 hours at room temperature, continuous 5 cycles. Observation, if the spiral protective sleeve without cracking, sticky, depressions and other phenomena occur, was high-quality; the other hand, if the spiral protective sleeve cracking, deformation, sticky or sunken one of the phenomena, the protective cover for the poor, qualified.
4. Oil resistance Good quality of the Spiral Wrap Hose Protectors has good oil resistance. Spiral protection can be set in the 70 # gasoline and 10% toluene mixture soak for 5 minutes, if no discoloration, sticky phenomenon, the quality of qualified ; Conversely, there are discoloration, sticky phenomenon, then the protective cover for the poor, unqualified.
5. Wear-resistant high-quality qualified spiral protective sleeve with good wear resistance. Can be used "Akron wear test" for testing. If the mass difference is less than 0.07, it is high quality. On the other hand, if the mass difference is greater than 0.07, the spiral protection sleeve is inferior and unqualified.
6. Tensile strength Impact strength
