Application of antirust paint in oil pipeline

Basic requirements for pipeline anticorrosive coating.


According to the production process, long-distance transportation conditions and outdoor storage time of the oil pipeline, the antirust varnish shall have the following properties: good construction performance, environmental protection and safety, fast drying; bright and transparent paint film, which can be printed without covering the logo and the rusty state of the steel pipe surface; the oil pipeline shall be affected by wind, sun, rain and other environmental conditions, and the effect of the antirust layer shall be Good weather resistance; destructive impact, turbulence and influencing factors during transportation and transportation of oil pipeline during loading and unloading; good impact resistance of antirust layer; good heat and humidity resistance and salt fog resistance of antirust layer in transportation and humid area; temperature in winter and summer in desert and cold area can reach 30-60 ℃, rust The layer should have good thermal denaturation.






Production process of oil pipe and antirust varnish coating process.


About 11 m long seamless steel pipe, after tempering, straightening, magnetic flux leakage test, a side trolley, a server side thread inspection, hydrostatic test after sealing ring oil seal; B side trolley wire, B end thread inspection, ferrule sealing oil, both ends with protective rings; the steel pipe of the conveyor is vertically transported to the coating room, the spray gun is started, 30-60 s after spraying one pipe, and then coding; the steel pipe enters the dry area Domain, horizontal translation, manual color band coating, about 30 minutes in the dry area, there are also some production lines using low-temperature baking for 15 minutes. Check the steel pipe, and lift the package to the warehouse. Painting is a process in the production process. The quality of the rust layer is affected by the fluctuation process. In the spraying process, the antirust coating stored in the tank is good by the high-pressure airless spray gun or air spray gun, and the spraying parameters are controlled by the controller. The pipe enters the spraying room, opens the spraying gun device, leaves the steel pipe, stops the spraying gun device, and the steel pipe enters the drying area for drying. Spraying the eight nozzles with radial distribution, the spray room has smoke exhausting and smoke exhausting system, smoke exhausting system spray paint mist, recovery tank at the bottom of spray chamber, and liquid paint is recovered.






Oil pipeline with antirust paint.


Quick drying, good weather resistance, acid resin paint film is transparent, as the film-forming material of steel pipe anticorrosive paint is very good. The use of modified phenolic resin can improve the corrosion resistance and wear resistance of the coating, and form the strength of light paint film; petroleum resin can improve the coating, ductility and water resistance of the steel pipe surface, and reduce the cost. The selection of oil soluble corrosion inhibitor and oil soluble corrosion inhibitor can greatly improve the performance of the paint film to protect metal and resist atmospheric corrosion, thus enhancing the antirust effect on metal. Then, a single composite inhibitor has a better synergistic effect. This is because the composite inhibitor can form a multilayer protective film on the metal surface, thus solving the original problem. The safety of protective film is poor, and the distribution of corrosion potential defects is uneven. From the safety point of view, the solvent selection of ite construction line has the advantages of small toxicity and high flash point.