The industry standard SY/T0413-2002 does not stipulate the uniformity of the thickness, it stipulates the minimum thickness value of the coating, but it is required that the minimum thickness value of the coating cannot be lower than the thickness value of the low point, not the value of multiple test points average value. If the coating thickness of 3PE anti-corrosion steel pipe coating is uneven, it will inevitably cause a waste of butcher materials. Apply standard thickness.
Moreover, in the case of uneven coating, it is easy to cause the coating thickness of the thin part of the 3PE anti-corrosion steel pipe to fail to meet the standard. The reasons for the uneven thickness in the production process are mainly due to the uneven discharge of the material in several places and the bending of the steel pipe.
An effective way to control the uneven coating of 3PE anti-corrosion pipelines is to adjust several extrusion dies to make the thickness of anti-corrosion coatings as uniform as possible in several places and to prevent unqualified steel pipes from being coated online.
Post time: May-17-2023