3pe Anti-corrosion Steel Pipe Development History Review

Thirty years of playing a finger. Whether it is the development of erw steel pipe or seamless steel pipe, we have made great achievements. We are proud of the development of the whole steel pipe enterprise and the rise of the industry; social progress, economic development, improvement of people's quality of life, emphasis on ecology, especially the proposal of green economy.

The change in the way of economic growth has made us feel pressured. Large market, high demand, large gap and heavy responsibility are new issues facing anti-corrosion enterprises. "Green economy" requires 3PE anti-corrosion steel pipe production environment without pollution, resource saving without waste, long-life and safe operation of the facility without accident, personal health and no harm, is the economy that children and grandchildren can continue to develop, and people and nature coexist harmoniously The economy is a vibrant economy.

Pipeline steel pipelines include X60~X70 series steel pipes and X80 pipeline steels that have been put into production. This pipeline and 3PE anti-corrosion steel pipes are mostly used in the West-East Gas Pipeline Project in China. A large part of China's vast natural gas is transported from neighboring natural gas countries through 3PE anti-corrosion steel pipes to China. With the successive discovery and development of natural gas fields in China, the demand for pipeline steels using 3PE pipeline anti-corrosion technology will be even greater.

In the gas pipeline transportation in the city, it is necessary to pass through the buried 3PE anti-corrosion steel pipe to enter the residents' home. However, the electrolysis weight loss, pH value, chloride ion amount, scattered electron amount, humidity, and moving friction of the underground soil are all Corrosion to underground pipelines. The corrosion rate of the material in the underground Cl- ion concentration is the average corrosion rate of the underground material and the local corrosion growth rate. The results show that as the Cl- ion concentration in the soil increases, the corrosion corrosion rate increases, and the Cl- ion concentration on the local corrosion.

The promotion of the expansion rate is significantly higher than the average corrosion rate. The ability of groundwater to damage the pipeline, when the water contains CO2 and SO2-4 for a long time, or when the H+ concentration is high, the water is aggressive, and the water containing the erosive CO2 can dissolve the calcium in the concrete and cause the pipeline to corrode rapidly. Gas pipelines using 3PE anti-corrosion steel pipes can use this high-efficiency anti-corrosion property to prevent corrosion of CO2 and negative ions on the pipeline.

3PE anti-corrosion steel pipe epoxy powder anti-corrosion coating thickness; international standard is 250 microns, is more than three times the depth of 70 microns of shot blasting, and China's standard is 150 microns, up to the maximum depth of shot blasting 70 microns Three times, the temperature requirement for epoxy powder coating should be above 200 degrees, and many of our anti-corrosion processing companies control the spraying temperature between 100 and 120 degrees, affecting the coagulation strength of epoxy powder, in addition to epoxy powder. Polyethylene graft adhesive should be used between PE film.

In order to reduce the engineering cost, many processing companies now use conventional hot melt adhesives, which make the service life of glue and PE materials not uniform, which is restricting our 3PE anticorrosive steel pipe industry. One of the important factors is that if the spiral pipe is used in the construction of the pipeline, the height of the weld is two millimeters. The T-die winding method can not completely cover the groove on both sides of the weld, and the air cannot be completely discharged. Taboo in the anti-corrosion process! If the pipeline is a large-diameter steel pipe with a large self-weight, it will encounter hard objects such as the central stone in the trench, which will certainly damage the PE and the brittle epoxy powder layer, causing hidden corrosion of the pipeline.

A worker from a steel pipe company, which is located in China.