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Summary of 3PE polyethylene anticorrosive steel pipe

Attention:     Issuing time:2020-03-06 09:44
Summary of 3PE polyethylene anticorrosive steel pipe

3PE anti-corrosion steel pipe refers to a 3-layer structure polyolefin coating (MAPEC) outer anti-corrosion steel pipe, which is a commonly used anti-corrosion pipe in China. Others include IPN8710, FBE epoxy powder, epoxy coal tar, etc.
In the process of communicating with foreign steel pipe buyers, especially engineering contractors, they recognized the product quality and production capacity of 3PE anticorrosive steel pipes exported from China. However, the mastery of the professional knowledge of Chinese foreign trade people, at least in the 3PE anti-corrosion steel pipe expertise, do not trust much. For example, the composition of 3PE, thickness, peel strength test requirements and other aspects that customers want to know very much, the response we give can not make the other party particularly satisfied.
So I sorted out some materials and made a brief statement about some basic 3PE knowledge and the current status of 3PE steel pipe corrosion protection in China. I hope that I can help some friends who are interested in understanding 3PE anti-corrosion steel pipe. Please correct the deficiencies and welcome everyone to discuss.

3PE polyethylene anticorrosive steel pipe
3PE anti-corrosion steel pipe refers to a 3-layer structure polyolefin coating (MAPEC) outer anti-corrosion steel pipe, which is a commonly used anti-corrosion pipe in China. Others include IPN8710, FBE epoxy powder, epoxy coal tar, etc.
3PE anticorrosion generally consists of 3 layers of structure:
The first layer of epoxy powder (FBE> 100um)
Second layer of adhesive (AD) 170 ~ 250um
The third layer of polyethylene (PE) 2.5 ~ 3.7mm
In actual operation, the three materials are mixed into a whole, and after processing, it is firmly combined with the steel pipe to form an excellent anticorrosive layer. Its processing methods are generally divided into two types: winding type and round mold coating type.
  The 3PE anti-corrosion steel pipe standards are implemented in China as SY / T0413-2002 standards, and will be implemented on August 1, 2002. The standard mainly regulates polyethylene and high-density polyethylene, and the Vicat softening point is set to not less than 110 ° C. The thickness of the outer anticorrosive layer is determined according to German standard DIN30670-1991, which is mainly low and medium density polyethylene. Greatly improved the impact strength of the 3PE anticorrosive layer. SY / T0413-2002 significantly improved the peel strength and impact resistance of the 3PE anticorrosive layer, and clearly specified the carbon black content of some special materials to ensure the mechanical strength and weather resistance of the 3PE anticorrosive layer, and increased the fill Peel strength (that is, the peel strength of the heat-shrinkable sleeve and heat-shrinkable tape to the primer steel).

The development of 3PE anticorrosive steel pipe in China
Development status of 3PE anticorrosive steel pipe In the early 1980s, 3PE anticorrosive steel pipe was first widely used in Europe, and was well received by users. It is the most widely used pipeline coating system. In the summer of 1994, China National Petroleum Corporation decided to introduce 3PE coating operation and coating technology for the outer anti-corrosion coating of the upcoming Shaanxi-Beijing gas pipeline and Kuyu oil pipeline. In December of the same year, experts from the China Petroleum Infrastructure Construction Bureau, the Pipeline Bureau, the Sichuan Petroleum Design Institute, and the Northwest Pipeline Command jointly organized a delegation to inspect the 3PE coating operation line in the United States, Italy, Turkey, and other countries. In May 1995, Liaohe Oil Construction No. 1 Company was in charge of bidding to introduce China's first 3PE coating operation line from Canadian Genlau Company. Normal production was started in early 1996. In 1996, the Shuozhou Anticorrosion Plant, a joint venture between the Italian Soxham Company and the No. 6 Plastic Factory in Harbin, was transformed into normal production in May. Northwest Pipeline Headquarters and a Hong Kong business partner jointly introduced a 3PE coating operation line from the Netherlands, which was completed and put into production in Baoji Yadong Anticorrosion Company in 1996. At this point, 3PE anticorrosion has received attention and application in China. Starting from the construction of the Seininglan pipeline, through tendering, and all 3PE anticorrosive materials were domestically produced, the prefabricated price of 3PE anticorrosion has dropped sharply. Since then, the era of widespread application of 3PE anticorrosion in China has started. So far, 20,000km of anticorrosive buried steel pipes have been used for anticorrosion. coating. At present, there are dozens of 3PE coating lines in China, which have the ability to process 3PE coating of Φ25-2800mm steel pipe.
Application of 3PE anticorrosive steel pipe
The use of 3PE anti-corrosion steel pipe Many people only know the use of 3PE anti-corrosion steel pipe, its role is really a wide coverage, it is suitable for coal mine water supply and drainage, underground spraying, positive and negative pressure ventilation, drainage Gas and fire sprinkler networks. Waste water slag and return water pipeline for thermal power plant. It has excellent applicability to the water supply pipeline of anti-spray and sprinkler systems. Cable protection bushings for power, communication, and highways. Suitable for high-rise building water supply, heating network heating, tap water engineering, gas transportation, buried water conveyance and other pipelines. Process pipelines for transporting corrosive media in petroleum transportation pipelines, chemical and pharmaceutical industries, printing and dyeing industries. Sewage treatment discharge pipe, sewage pipe and biological pond anticorrosion project. It can be said that 3PE anti-corrosion steel pipes are essential in the current construction of agricultural irrigation pipes, deep well pipes, drainage pipes and other networks. It is believed that through the extension of science and technology, it will have more brilliant achievements in the future.

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