Defect Name: loose coil < br / > definition and appearance: < br / > the phenomenon that the steel coil is not tightly rolled and there is an obvious gap between layers is called loose coil& nbsp;  & nbsp; Causes: < br / > ● unreasonable coiling tension setting or insufficient coiler capacity< Br / > ● the steel strip has serious wave shape, and the steel coil cannot be rolled tightly< Br / > ● the steel belt has high strength or is too thick, and the binding belt is not tightened or broken< Br / > ● after the steel strip is taken up, the drum is reversed for some reason< Br / > hazards: < br / > affect the packaging and handling of steel coils, and serious loose coils may make the steel coils unusable< Br / > prevention and elimination methods < br / > ● reasonably set the coiling tension, and the strength and thickness of the coiling steel strip shall not exceed the capacity of the coiler< Br / > ● strengthen the shape control of steel strip to prevent serious wave shape of steel strip. When it cannot be rolled tightly, it shall be rolled in time< Br / > ● ensure the quality of the strapping belt, tighten it during baling, and lift it gently during lifting to prevent the strapping belt from breaking< Br / > ● prevent the drum from reversing< Br / > inspection and judgment: < br / > ● visual inspection< Br / > ● slight looseness is allowed, but the outer diameter of the steel coil shall not exceed the provisions of the standard< br/>