Views: 16 Author: Site Editor Publish Time: 2021-01-06 Origin: Site
Oil pipeline anti-corrosion is the most important part of oil pipeline engineering management. Due to the vast areas of my country, the transportation system of oil companies uses long pipelines for underground logistics transportation. All have played an important role, so the anti-corrosion treatment of Petro China's pipeline is particularly important.
According to the cross-sectional shape, it is divided into round, square, rectangular and special-shaped steel pipes; according to the material, it is divided into carbon structural steel pipes, low-alloy structural steel pipes, alloy steel pipes and composite steel pipes;
According to the purpose, it is divided into pipelines, engineering structures, thermal equipment, petrochemical industry, machinery manufacturing, geological drilling, high-pressure equipment steel pipes, etc.;
According to the production process, it is divided into seamless steel pipes and welded steel pipes. Seamless steel pipes are divided into two types: hot-rolled and cold-rolled (drawn), and welded steel pipes are divided into longitudinally welded steel pipes and spirally welded steel pipes.
Now with the development of my country's oil pipeline anti-corrosion technology research, there are mainly the following three characteristics:
1. The anti-corrosion of oil pipelines now uses more coating isolation technology, coupled with the use of related technologies to protect the coating, on-site construction, centralized prefabricated anti-corrosion coating, so as to be more efficient and more stable in quality.
2. Although oil pipelines have anti-corrosion coatings in the process of non-mainstream waterlines, old asphalt-based coatings are still used on a larger scale, but new anti-corrosion materials, such as polyethylene three-layer, fused epoxy powder, coal Therefore, tar enamel is widely used as the main anti-corrosion material inside the piping oil field.
3. From the current situation of Chinese enterprises, the main components of the research on the anti-corrosion technology and materials of the internal gathering pipelines and long-distance pipelines of China Oilfield Company are a three-layer polyethylene, fused epoxy powder and a small amount of coal tar enamel.
The main functional material components of pipeline anti-corrosion coating are different petroleum engineering asphalts.
The anti-corrosion construction materials of urban gas supply and water supply system pipelines generally use epoxy coal tar pitch and tape, jacket, paraffin, coal tar pitch, tape, petroleum pitch, asphalt glass cloth coating, and the country can use polyolefin three-layer composite industrial structure analysis coating.