3PE anti -corrosion steel pipe execution standard
The SY/T0413-2002 standard is implemented in China, which will be implemented on August 1, 2002. The standards are mainly regulated that polyethylene and high-density polyethylene are dominated, and the vitamin softening points are determined to be not less than 110 ° C; the thickness of the external corruption layer is determined by the German standard DIN30670-1991, which is mainly based on low and medium density polyethylene. Greatly improved the impact strength of the 3PE anticorrosive layer. SY/T0413-2002 greatly improves the peeling strength of the 3PE anti-corrosion layer and the anti-impact indicators, and clearly stipulates that according to the black content of some special-purpose carbon, it ensures the mechanical strength and weather resistance of the 3PE anticorrosive layer, and increases the complement of the mouth. Dipping intensity (that is, the peeling strength of the bottom lacquer steel with the heat contraction, the heat belt).
Anticorrosion structure
3PE anticorrosion is generally composed of 3 layers of structure:
The first layer of epoxy powder (FBE> 100um)
The second layer of adhesive (AD) 170 ～ 250um
The third layer of polyethylene (PE) 1.8 ～ 3.7mm
In the actual operation, the three materials are mixed into one, and the processing with the steel pipe is firmly combined with the steel pipe to form an excellent anticorrosive layer. Its processing method is generally divided into two types: winding type and round mold covering type.
3PE anti -corrosion steel pipe coating is also (three layers of polyethylene anticorrosive coating). It is a new kind of anti -corrosion in Europe's 2PE anticorrosive layer and North America's extensive use of epoxy powder anti -corrosion steel pipe coating (FBE) Steel pipe coating. It has been recognized and used in the world for more than ten years.
The coating of the 3PE anticorrosive steel pipe is the bottom layer and the steel pipe surface contact the epoxy powder anti -corrosion coating. The middle layer is a co -adhesive with a branch structure function group. The surface layer is high -density polyethylene anticorrosive coating.
3PE anticorrosive coating integrates the high -resistance and high mechanical properties of epoxy resin and polyethylene materials. So far, it is the world's recognized pipeline anticorrosive coating with the best effect and the best performance, which has been applied to many projects.
