Factors Affecting Burst Pressure of Fire Hose
Time:
2022-07-14
(1) Design factors. The influencing factors of the blasting pressure of the hose are the breaking strength of the weft, the elongation at break, the elongation at break of the warp and the initial weft density of the hose. Therefore, materials with high breaking strength and low elongation at break should be selected for warp and weft, and the weft density can be appropriately increased without affecting the softness and quality of the hose. (2) Production process factors. First of all, although the twisting of the warp and weft threads will increase the breaking strength, too high twist will reduce the breaking strength and reduce the softness of the hose. In actual production, the twist is generally 30 ~ 200 T m is more appropriate ; Secondly, the uneven tension of single filament or single yarn will cause the breaking strength after merging to be less than the resultant force of each single strand; third, the upper orifice plate, shuttle wheel, tension spring and jumper spring of the circular loom, etc. If it is not smooth, the breaking strength of the warp and weft will also be lost.
(1) Design factors. The influencing factors of the blasting pressure of the hose are the breaking strength of the weft, the elongation at break, the elongation at break of the warp and the initial weft density of the hose. Therefore, materials with high breaking strength and low elongation at break should be selected for warp and weft, and the weft density can be appropriately increased without affecting the softness and quality of the hose.
(2) Production process factors. First of all, although the twisting of the warp and weft threads will increase the breaking strength, too high twist will reduce the breaking strength and reduce the softness of the hose. In actual production, the twist is generally 30 ~ 200 T m is more appropriate ; Secondly, the uneven tension of single filament or single yarn will cause the breaking strength after merging to be less than the resultant force of each single strand; third, the upper orifice plate, shuttle wheel, tension spring and jumper spring of the circular loom, etc. If it is not smooth, the breaking strength of the warp and weft will also be lost.
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