When it comes to long-distance pipeline construction for urban water supply, industry professionals always refer to large-diameter longitudinal welded pipe anti-corrosion equipment that supports internal FBE coating and external cement mortar spraying, with a maximum processing diameter of DN6600 and even DN8800. For this type of longitudinal welded pipe anti-corrosion equipment, the technical level of FBE anti-corrosion treatment and cement mortar spraying process directly determines the equipment’s technical advancement, as well as the overall quality of finished longitudinal welded pipes with internal FBE coating and external cement mortar protection.
High-Performance Internal FBE Fusion Bonded Epoxy Coating Process for Longitudinal Welded Pipes
Internal FBE anti-corrosionis a premium high-end protection technology for longitudinal welded pipes , officially defined as a thermosetting powder coating system . During equipment operation, the steel pipe inner wall first undergoes high-standard surface pretreatment. The pipe body is integrally preheated to the specified process temperature via professional heating equipment. With a dedicated cantilever spraying system , epoxy powder is delivered by compressed air and forms a uniform, dense, and high-adhesion steel-plastic composite protective layer on the pipe inner wall through electrostatic adsorption, high-temperature melting , leveling and curing reactions.
The FBE coating features a seamless structure and extremely low porosity . It effectively resists acid, alkali and microbial corrosion from water media while reducing pipeline water delivery resistance and improving overall water transmission efficiency , making it an ideal inner-wall anti-corrosion solution for large-diameter water supply steel pipes .
The outer wall of longitudinal welded pipes adopts a professional polymer-modified cement mortar spraying process. Using special silicate cement , fine aggregates and polymer modified additives as raw materials, the anti-corrosion mortar is mixed with precise proportioning. The high-pressure airless spraying equipment evenly coats the steel pipe outer wall. After compaction , leveling and moisture curing , a high-strength, high-compactness rigid protective layer is formed.
Durable External Polymer Modified Cement Mortar Spraying Anti-Corrosion Process
This cement mortar coating delivers high mechanical strength , excellent compression resistance , soil corrosion resistance and anti-aging performance . It effectively protects buried steel pipes from external impact , groundwater erosion and acid-base soil damage , fully adapting to the long-term buried service conditions of ultra-large diameter water transmission pipelines .
As a leading enterprise with innovative technical breakthroughs in the field of steel pipe anti-corrosion equipment , Huashida has long been committed to process innovation and technological upgrading . The company provides valuable industry references for China’s anti-corrosion equipment manufacturing sector and serves as a benchmark brand in the domestic pipeline anti-corrosion machinery industry.
