Corrosion-resistant steel pipes refer to steel pipes that have undergone anti-corrosion processing, which can effectively prevent or slow down the occurrence of chemical or electrochemical reactions leading to corrosion during transportation and use. According to our national statistics, the direct economic loss from steel pipe corrosion within the country is over 280 billion yuan annually.
Annual losses worldwide due to steel pipe corrosion amount to as much as $500 billion. Corrosion-resistant steel pipes can effectively prevent or slow down corrosion, extending the service life of steel pipes and reducing operation 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 welded pipes, plate-to-roll butt-welded pipes, and hot-expanded welded pipes.
Categorized by shape
Steel pipes can be categorized by shape into: round pipes, square pipes, rectangular pipes, octagonal pipes, hexagonal pipes, D-shaped pipes, pentagonal pipes, and other special-shaped pipes such as complex cross-section pipes, double concave pipes, five-petaled plum-shaped pipes, conical pipes, corrugated pipes, melon-shaped pipes, and double convex pipes, etc.
Categorized by Application
Steel pipes are categorized by their applications, including: pipeline steel pipes, heat exchanger steel pipes, machinery industry steel pipes, oil and geological drilling steel pipes, container steel pipes, chemical industry steel pipes, and special purpose steel pipes, etc.
Corrosion Prevention 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 Resistance in Compliance with GB/T23257-2009 "Technical Standard for Polyethylene External Coating of Buried Steel Pipelines"
Corrosion-resistant coating surface rust standard: The steel pipe outer surface shot blasting rust removal should meet the requirements of GB/T8923-2008, reaching Sa2 1/2 grade, with the anchor pattern depth on the steel pipe surface being 40-100μm.
Steel pipes, through anti-corrosion treatment, not only extend the service life of the pipes but also manifest in the following aspects:
Combine the mechanical strength of steel pipes with the corrosion resistance of plastics.
2. The outer wall coating is over 2.5mm thick, with resistance to scratches and impacts.
3. Low wall friction coefficient, ranging from 0.0081 to 0.091, reduces energy consumption.
4. The inner wall meets national hygiene standards.
5. The inner wall is smooth and resists scaling, featuring an automatic self-cleaning function.
