3PE Anticorrosive Insulation Steel Pipe For Oil And Gas Pipeline Transportation

The three-layer pipeline coating system mainly composed of DOW HDPE 12110 G, AMPLIFY GR 320, and fusion-bonded epoxy powder can directly act on the surface of the pipeline. The coating system can provide excellent appearance and performance protection for the pipeline surface, effectively prolong the service life of oil and gas pipelines, and make the construction of pipeline coating easier and more convenient.
The key technology of pipeline anticorrosion is to extend the service life of pipelines in harsh environments, improve the performance of pipelines under mechanical wear, and effectively resist ultraviolet radiation. As the topcoat material in the coating system, DOW HDPE 12110 G has excellent environmental stress crack resistance (ESCR), excellent physical properties and excellent processing properties; AMPLIFY GR 320 is newly developed by Dow Adhesive products can provide excellent adhesion between the topcoat and FBE, making the three-layer coating integrated, greatly enhancing the mechanical strength, low resistance, high temperature performance, and low water absorption of the coating system. . Metal corrosion is a major economic problem. my country's annual losses due to metal corrosion are as high as hundreds of billions of yuan. In some industrially developed countries, the losses caused by metal corrosion even account for more than 3% of the annual gross national product. Among them, pipeline corrosion accounts for a large proportion. With the continuous and rapid development of the economy, my country's energy demand continues to increase, and the amount of pipeline construction is also increasing. The oil and natural gas pipelines to be built will reach more than 40,000 kilometers. Various gas supply, There are countless water and heating pipelines, which makes the protection of pipeline corrosion more and more important. Pipeline anti-corrosion usually adopts a combined protection method of anti-corrosion layer and cathodic protection. Pipeline anti-corrosion layer is the first barrier, which is directly related to the anti-corrosion performance and operating life of the pipeline. Therefore, strengthening the research on anti-corrosion coatings is of great significance to the corrosion control of the entire pipeline. 3pe anticorrosive steel pipe three-layer structure polyethylene anticorrosion layer (3pe) combines the excellent properties of fusion bonded epoxy powder coating and extruded polyethylene anticorrosion layer, combining the interface characteristics and chemical resistance of fusion epoxy powder coating , Combined with the advantages of extruded polyethylene anti-corrosion layer mechanical protection characteristics and other advantages, thereby significantly improving their performance. Therefore, it is very superior as the outer protective layer of buried pipelines. According to relevant information, the three-layer pe can make the life of buried pipelines reach 50 years. At present, it is regarded as the most advanced external pipeline anticorrosion technology in the world. In my country, the three-layer pe has been applied first in the oil and gas system. The Shaanxi-Beijing natural gas pipeline and the Kushan oil pipeline that have been built in my country, and the nearly 4,000-kilometer pipeline of the West-East Gas Pipeline, a national key project, have adopted three-layer PE outer anticorrosive coating. In Tianbaiyin City, the 67 kilometers high-pressure pipeline of Shaanxi gas into Tianjin, 30 kilometers of high-pressure natural gas pipeline on the outer ring line, and 122 kilometers of underground gas storage pipeline on the Shaanxi-Beijing line are also three-layer pe. It has become the development direction of the outer anti-corrosion coating of pipelines in the future!

3pe anticorrosive steel pipe structure

3pe anticorrosive pipes are pipes (steel pipes) used in different working environments. In order to slow down or prevent the pipes from being corroded and deteriorated by the chemical or electrochemical action of the external medium or by the metabolic activities of microorganisms, the outer wall of the pipe is coated with 2 layers or 3 Layer polyethylene (3pe) to achieve pipeline anti-corrosion, 3pe anti-corrosion pipe life extension 3-5 times. Polyethylene three-layer structure protective layer, also known as three-layer pe (3pe), is an advanced anti-corrosion technology imported from abroad in recent years. Its full name is fusion bonded epoxy/extruded polyethylene structure protective layer, and the structure is composed of the following three layers: the bottom layer is fused epoxy (≥80μm); the middle layer is adhesive (170-250μm); the surface layer is extruded Polyethylene (about 2mm). The total thickness of the protective layer is about 1.8-3.7mm. In the three-layer structure, the main function of the fusion-bonded epoxy powder coating is: to form a continuous coating film, which is directly bonded to the surface of the steel pipe, and has good chemical resistance and cathodic stripping resistance; it is compatible with the intermediate layer adhesive The active groups react to form chemical bonds, ensuring that the overall anti-corrosion layer has good adhesion at higher temperatures. The middle layer is usually a copolymer adhesive, and its main component is polyolefin. Currently, vinyl copolymer adhesives are widely used. The functional groups of the polar part of the copolymer adhesive and the epoxy groups of the fusion-bonded epoxy powder coating can react to form hydrogen bonds or chemical bonds, so that the middle layer and the bottom layer form a good bond; the non-polar vinyl part and the surface layer Polyethylene has a good affinity, so the middle layer and the surface layer also have good bonding properties. The main function of the polyethylene surface layer is to play a mechanical protection and anti-corrosion effect, which has the same effect as the traditional two-layer structure polyethylene.

3PE anticorrosive three-layer powder coating molding method
3PE coating currently used molding methods are epoxy powder electrostatic and thermal spraying, intermediate adhesive and outer polyethylene extruder hot extrusion winding or extrusion overmolding.
However, for spiral welded steel pipes or directly welded steel pipes, whether extrusion winding molding or extrusion overmolding is used, there are always defects on the weld side. And at low temperatures, since there is no physical penetration of the intermediate adhesive and epoxy powder, when the anti-corrosion layer is impacted by the outside, the impact area of ​​the anti-corrosion layer may be damaged.
If three kinds of powders are used for 3PE coating, the coating is completed by deposition and melting, which can reduce the defects of the weld anticorrosive layer, and the mutual penetration and welding of the powders increases the contact area and further increases the chemical bonding. At low temperatures It is not easy to be impacted and broken. The use of three powder materials for three-layer PE coating molding has certain application value.
Three kinds of powder coating 3PE anticorrosive coating process are: steel pipe surface treatment (rust removal) → intermediate frequency heating → epoxy powder electrostatic spraying → intermediate adhesive powder coating → polyethylene powder coating → leveling → cooling and shaping.

Product Description

Company Profile

Hebei Zexu Pipe Manufacturing Co., Ltd.is Cangzhou city tubing industry key unit , Is specialized in producing double-sided spiral welded steel pipe submerged enterprises, have been a number of certification. Company covers an area of 50,000 square meters, construction area of 7,000 square meters, 40 million yuan in fixed assets, with three production lines, the use of advanced U.S. Lincoln welder. 219-1620 * 5-14 mm capacity of the various models of two-sided specifications submerged spiral welded steel pipes.
"zexu," Pipe have been involved in: the 2008 Beijing Olympic construction projects nest works, the building of the Daqing Oilfield, North China Electric Power, the state water project - the building-north water diversion project, as well as China's Water Resources and Hydropower Construction Group in Algeria and other large construction projects highlights the works .
The company has a sound detection devices, X-ray detection machine, the television industry, ultrasonic flaw detector, the hydrostatic pressure testing machine, universal testing machine and chemical composition analyzer, and other equipment, technical and professional operators, so that we passed ISO9001 - 2000 international certification system of one-time access to AQSIQ issued by the special equipment manufacturing license. zero accuses what be produced a steel pipe continously for 3 years.
And joint venture companies - Cangzhou bold Pipe Co., Ltd.; major production and marketing: They seamless expansion of the program, straight slit pipe, large diameter thick-walled pipe, and other broad categories. Product implementation GB GB, American Standard ASTM, API, ANSI, the superscript JIS, German standard DIN standards. Can be done in accordance with customer demand anti-corrosion insulation and cement-lined treatment. In the low and high pressure boiler seamless steel tubes, transmission fluid, with seamless steel pipe structure, the company covers an area of 105,000 square meters. Construction area of 1,500 square meters, employees 50 people. The company mainly produces equipment: 4 IF thermal expansion pipe production unit, can produce 219-820 x6-40mm thermal expansion of the seamless, straight seam of the gang. A hydraulic pipe major equipment leveler, no water annealing furnace, X-ray detection machine, 300T hydrostatic pressure testing machine and surface coatings, such as supporting pickling. Physical and chemical laboratory for chemical products can learn out, metallographic analysis, physical testing and other testing. Advanced technology, the means perfect. Products sold to the country and exported to the United States, Japan, Russia, Brazil, India, Southeast Asia, the Middle East, North America, more than 10 countries and regions, in markets at home and abroad enjoy a high reputation.
"Good faith, the quality of Societe Generale, first-class service, users first, refinement, innovation and forging ahead" for the purpose of proactive.

      Hebei Zexu Pipeline Manufacturing Co., Ltd. has a complete production and operation management system and is one of the first companies in the industry to pass the ISO9001 quality management system certification, HSE environment, and occupational health and safety management system certification. The company has three manufacturing branches for steel pipes, pipe fittings, and boiler vessels, and has functional departments such as marketing department, technology department, purchasing department, production department, inspection department, quality assurance department, and comprehensive department. It has established a complete and complete set of quality, Safety, production and management procedures.
      After years of development, Hebei Zexu Pipeline Manufacturing Co., Ltd. has a nationwide business network and radiates to the United States, India, Pakistan, Russia, the Middle East and other countries and regions.
      Hebei Zexu Pipe Manufacturing Co., Ltd. has always adhered to the business philosophy of honesty, innovation and cooperation to promote development, customer satisfaction and trust as the foundation, sustainable development as the goal, relying on scientific management to improve quality, reduce costs, and create brands. For many consecutive years, it has been awarded as "Advanced Unit for Safety Production Standardization Construction", "Hebei Province Industrial Cluster Leading Enterprise", "AAA Credit Enterprise", "Hebei Province Metal Products Industry Leading Enterprise", "Hebei Province Key Employment Service Enterprise", "Star Enterprise", "Top 50 Industrial Enterprises in Cangzhou City", "Famous Trademark of Hebei Province", "Contract-abiding and Promise-keeping Unit", "Recommended Supplier of Main Auxiliary Equipment for Thermal Power Units" and other honorary titles.