According to statistics, 20% of the total steel output is due to metal corrosion every year in China, and about 30% of equipment is scrapped due to corrosion, which not only pollutes the environment, but also wastes a lot of resources and energy consumption. Pipeline anti-corrosion measures are necessary to prevent the pipeline from being corroded by soil, air and transmission media (oil, natural gas, etc.). Most pipelines transporting oil and gas are in complex soil environment, and most of the media transported are corrosive, so the inner and outer walls of the pipeline may be corroded. Once the pipeline is corroded and perforated, it will cause oil and gas leakage, which will not only interrupt transportation, but also pollute the environment, and may even cause fire and harm.
Therefore, the prevention of pipeline corrosion is an important part of pipeline laying. Huading has spent a lot of energy on anti-corrosion of pneumatic ball valves, and has developed a variety of anti-corrosion methods, especially in seawater desalination projects and circulating water pipes of power plants. Let Hengchang's technicians tell you today that pneumatic ball valves will not be corroded. The anti-corrosion of pneumatic ball valve should be reflected in two aspects: 1. The product material should be improved; 2. Protective measures should be taken outside the product. When the pneumatic ball valve used by us is in the pipeline for a long time, it will be corroded, which will lead to serious consequences. How can we avoid the corrosion of the pneumatic ball valve?
First of all, we all know that painting anticorrosive paint is essential to protect the pneumatic ball valve from corrosion, but have you ever thought that the anticorrosive paint will also fail, and when the anticorrosive paint fails, it will not play the role of anti-corrosion, so that its ongoing work will be affected to a certain extent; Therefore, we have developed a new method, which is to add Cr to the pneumatic ball valve. Only the higher the Cr content in the pneumatic ball valve, the stronger its corrosion resistance and the higher its use value will be. When Cr added pneumatic ball valves are used in different seawater and pipe networks, the probability of corrosion is 0%. Therefore, if we want to use our pneumatic ball valve for a long time so that it will not corrode, we should choose to use Cr. The film coated on the inner wall of the pipe in order to prevent the internal corrosion of the pneumatic ball valve, reduce the friction resistance and improve the throughput. Commonly used coatings are amine cured epoxy resin and polyamide epoxy resin, and the coating thickness is 0.038~0.2mm. In order to ensure that the coating is firmly bonded to the pipe wall, the inner wall of the pneumatic ball valve must be surface treated. So that the coating of the inner and outer walls of the pipe can be carried out at the same time, this anti-corrosion can effectively extend the service life of the pneumatic ball valve of the steel pipeline and save the operation cost of the project.
Anticorrosive and thermal insulation coating: in order to reduce the heat dissipation of the pipeline to the soil, a composite layer of thermal insulation and anti-corrosion shall be added outside the pipeline on the medium and small diameter pipelines for hot crude oil or fuel oil transportation. The commonly used thermal insulation material is rigid polyurethane foam, and the applicable temperature is - 185~95 ℃. This material is soft. In order to improve its strength, a layer of high-density polyethylene layer is applied outside the insulation layer to form a composite material structure to prevent groundwater from seeping into the insulation layer. With the progress of society, enterprises have higher requirements for rust prevention of pneumatic ball valves. In particular, the internal rust prevention is related to our usual drinking water safety and resource safety, so the internal rust prevention standard of steel pneumatic ball valve is the most concerned