The industry standard SY/T0413-2002 does not stipulate the uniformity of thickness. It stipulates the low thickness value of the coating but requires that the low thickness value of the coating cannot be lower than the thickness value of the low point, rather than the thickness value of multiple test points. average value. If the coating thickness is uneven during the coating process of 3PE anti-corrosion steel pipe, it will inevitably cause a waste of butcher materials. This is because when the coating thickness in thin parts reaches a low standard, the thickness of thick parts will be larger than the coating thickness. Apply standard thickness.
Moreover, the uneven coating can easily cause the coating thickness in the thin parts of the 3PE anti-corrosion steel pipe to fail to meet the standard. The main reasons for uneven thickness during the production process include uneven material discharge at several points and bending of the steel pipe.
An effective method to control the uneven coating of 3PE anti-corrosion steel pipes is to adjust several extrusion dies to make the thickness of the anti-corrosion coating as uniform as possible in several places and to not allow unqualified steel pipes to be coated online.
Post time: Dec-26-2023