3PE anticorrosive steel pipe Cangzhou Haile Steel Pipe Co., Ltd

  Anti corrosion structure: 3PE anti-corrosion is generally composed of three layers: the first layer of epoxy powder (fbe> 100um), the second layer of adhesive (AD) 170 ~ 250um, and the third layer of polyethylene (PE) 2
5 ~ 3
7mm
In practice, the three materials are mixed and integrated into one
After processing, they are firmly consolidated with the steel pipe to form an excellent anti-corrosion layer
Its processing methods are generally divided into winding type and circular mold wrapping type
3PE anticorrosive steel pipe coating (three-layer polyethylene anticorrosive coating) is a new anticorrosive steel pipe coating produced by skillfully combining 2PE anticorrosive coating in Europe and epoxy powder anticorrosive steel pipe coating (FBE) widely used in North America
It has been recognized and used all over the world for more than ten years
The coating of 3PE anticorrosive steel pipe is epoxy powder anticorrosive coating, and the middle layer is copolymer adhesive with branch structure functional groups
The surface layer is high-density polyethylene anticorrosive coating
The three P E anticorrosive coating combines the high impermeability and high mechanical properties of epoxy resin and polyethylene materials
So far, it has been recognized as the best pipeline anticorrosion coating with the best effect and performance in the world, and has been applied in many projects

 
The base metal of 3PE anticorrosive steel pipe includes seamless steel pipe, spiral steel pipe and straight seam steel pipe
Three layer polyethylene (3PE) anticorrosive coating has been widely used in the oil pipeline industry because of its good corrosion resistance, water and gas permeability resistance and mechanical properties
3PE anticorrosive steel pipe - anticorrosive coating is very important for the service life of buried pipelines
Some pipelines of the same material are buried underground for decades without corrosion, and some leak within a few years
Because they use different external anti-corrosion coatings
Development status at the beginning of 1980s, 3PE anticorrosive steel pipe was first widely used in Europe and was highly praised by users
It is the most used pipeline coating system
In the summer of 1994, CNPC decided to introduce 3PE coating operation and coating technology for the external anti-corrosion coating of Shaanxi Beijing gas transmission pipeline and Ku Shan oil transmission pipeline
In December of the same year, experts from China Petroleum infrastructure Bureau, Pipeline Bureau, Sichuan Petroleum Design Institute and northwest pipeline headquarters jointly organized a group to investigate the 3PE coating line in the United States, Italy, Turkey and other countries
In MAY1995, Liaohe Oilfield Construction No
1 company was responsible for bidding and introduced China's first 3PE coating line from genrau company in Canada
It was put into normal production at the beginning of 1996
In 1996, the Shuozhou anti-corrosion factory jointly built by Italian soxhsam company and Harbin No
6 plastic factory was transformed and put into normal production in May
The 3PE coating line introduced from the Netherlands by Northwest pipeline headquarters and Hong Kong businessmen was completed and put into operation in Baoji Yadong anticorrosion company in 1996
So far, 3PE anticorrosion has been paid attention to and applied in China
Since the construction of Se Ning Lan pipeline, through bidding and the localization of all 3PE anticorrosive materials, the prefabrication price of 3PE anticorrosion has dropped significantly
From then on, the era of wide application of 3PE anticorrosion in China has begun
So far, the external anticorrosion of 20000km buried steel pipes has adopted 3PE anticorrosive coating
At present, there are dozens of 3PE coating operation lines in China, with processing φ Capability of 3PE coating for 25-2800mm steel pipe
Usage many people only know one thing about the use of 3PE anti-corrosion steel pipe
Its function really covers a wide range
It is suitable for underground water supply and drainage, underground shotcreting, positive and negative pressure ventilation, gas drainage, fire sprinkler and other pipe networks in coal mines
Waste residue and return water transmission pipeline for process water of thermal power plant
It has excellent applicability to the water supply pipeline of sprinkler and sprinkler systems
Power, communication, expressway and other cable protection sleeves
It is suitable for water supply of high-rise buildings, heat supply of heating network, water supply engineering, gas transmission, buried water transmission and other pipelines
Oil transmission pipeline, process pipeline for transporting corrosive media in chemical, pharmaceutical, printing and dyeing industries
Sewage treatment discharge pipe, sewage pipe and biological pool anti-corrosion works
For agricultural irrigation pipe, deep well pipe, drainage pipe and other network applications, it can be said that 3PE anti-corrosion steel pipe is essential in the current construction
It is believed that through the extension of science and technology, it will still have more brilliant achievements in the future
Main equipment for manufacturing 3PE anti-corrosion steel pipes: steel pipe buffer platform, pipe pulling unit, tractor, pipe threading machine, high-pressure blasting machine, repair platform, transmission line, steel pipe preheating furnace, main machine maintenance platform of shot blasting machine, return transmission line of branch grid steel pipes, fast in roller set, fast out roller, maintenance platform, etc
The anti-corrosion production line of anti-corrosion steel pipe can be applied to single-layer FBE, double-layer FBE, double-layer PE, double-layer PP and 3PE anti-corrosion operations of steel pipe
Minimum machining pipe diameter φ 104mm(4")， Maximum processing pipe diameter φ 1600mm(63")， The maximum processing capacity is more than 350m2/h
The production line includes steel pipe transmission system, surface treatment system, pipe body dust removal system, steel pipe heating system, electrostatic spraying system, coating system, water cooling system, end cutting system, hydraulic and pneumatic system, detection system and electric control system
Advantages ordinary steel pipes will suffer from serious corrosion under adverse conditions, which will reduce the service life of steel pipes
The service life of anti-corrosion and thermal insulation steel pipes is also relatively long
Generally, they can be used for about 30-50 years
Correct installation and use can also reduce the maintenance cost of the pipe network
The anti-corrosion and thermal insulation steel pipes can also be equipped with an alarm system to automatically detect the leakage fault of the pipe network, Accurate knowledge of fault location and automatic alarm
3PE anti-corrosion and thermal insulation steel pipe has good thermal insulation performance, and its heat loss is only 25% of that of traditional pipes
Long term operation can save relatively large resources, significantly reduce energy costs, and still has strong waterproof and corrosion resistance
It does not need to be attached with a pipe trench, and can be directly buried in the ground or water
It is also simple and rapid in construction, and the comprehensive cost is relatively low, It also has good corrosion resistance and impact resistance at low temperature, and can be directly buried in frozen soil in a certain environment
Process 3PE before anti-corrosion treatment for the base metal of anti-corrosion steel pipe, the steel pipe entering the pipe inlet platform shall be inspected and recorded, and the outer surface of the steel pipe shall be shot blasted for rust removal, and then the cleanliness and anchor depth of the outer surface of the steel pipe shall be inspected to see whether they meet the requirements
If they do not meet the requirements, they shall be polished and repaired to be qualified by hand grinding wheel, wrapped with adhesive tape at the pipe end, treated with micro dust, heated to the required temperature by the medium frequency, sprayed with epoxy powder, and wrapped on the side of the adhesive extruder, The PE extruder side is wrapped and burned, the anti-corrosion pipes are cooled by water, the qualified products are marked by spraying, and the pipes are laid on the platform and stacked for shipment