Corrosion-resistant steel pipes refer to steel pipes that have undergone anti-corrosion processing, which can effectively prevent or slow down corrosion due to chemical or electrochemical reactions during transportation and use. According to Chinese statistics, the direct economic loss from steel pipe corrosion in the country is over 280 billion yuan annually.
Each year, global losses due to steel pipe corrosion reach up to $500 billion. Corrosion-resistant steel pipes can effectively prevent or slow down corrosion, extending the lifespan of steel pipes and reducing their operational costs.
By Manufacturing Process Classification
Manufacturing processes for seamless steel tubes can be categorized into the basic types: hot rolling (extrusion), cold rolling (drawing), and hot expanded tubes.
(2) Welded pipes can be categorized by manufacturing process into: straight seam welded pipes, spiral seam welded pipes, plate-and-roll butt-welded pipes, and hot-expanded welded pipes.
By Shape Classification
Steel pipes can be categorized by shape into round tubes, square tubes, rectangular tubes, octagonal, hexagonal, D-shaped, pentagonal, and other special-shaped steel pipes, complex cross-section pipes, double concave tubes, five-petaled plum blossom-shaped tubes, conical tubes, corrugated tubes, melon-shaped tubes, and double convex tubes, etc.
By Application Type
Steel pipes are categorized by application into: pipeline steel pipes, heat-exchange equipment steel pipes, mechanical industry steel pipes, oil and geological drilling steel pipes, container steel pipes, chemical industry steel pipes, and steel pipes for special purposes, etc.
Antirust Standards
FBE epoxy powder coating conforms to SY/T0315—2005 "Technical Specification for Single-layer Fusion Epoxy Powder Coating on Steel Pipe"
2PE/3PE Corrosion Protection in Compliance with GB/T23257-2009 "Technical Standard for Polyethylene External Coating of Buried Steel Pipelines"
Corrosion-resistant surface rust removal standard: Steel pipe outer surface sandblasting rust removal in accordance with GB/T8923-2008 requirements to reach Sa21/2 grade, with anchor pattern depth on the steel pipe surface between 40-100μm.
Steel pipes, through anti-corrosion treatment, not only extend their service life but also manifest in the following aspects:
Combining the mechanical strength of steel pipes with the corrosion resistance of plastic.
2. The outer wall coating is over 2.5mm thick, providing resistance to scratches and impacts.
3. Low wall friction coefficient, ranging from 0.0081 to 0.091, reduces energy consumption.
4. Interior wall meets national hygiene standards.
5. The inner wall is smooth and resists scaling, featuring an automatic self-cleaning function.
