Corrosion-resistant steel pipes are those that have been processed through anti-corrosion techniques, effectively preventing or slowing 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 annually exceeds 280 billion yuan.
The global annual loss due to steel pipe corrosion exceeds $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 steel pipes, spiral seam welded steel pipes, plate-rolled butt-welded steel pipes, and hot-expanded welded steel pipes.
By Shape Classification
Steel pipes can be categorized by shape into: round pipes, square pipes, rectangular pipes, octagonal pipes, hexagonal pipes, D-shaped pipes, pentagonal pipes, and various other shaped steel pipes such as complex cross-section pipes, double concave pipes, five-petal plum blossom-shaped pipes, conical pipes, corrugated pipes, melon-shaped pipes, and double convex pipes, etc.
By Application Type
Steel pipes are categorized by their applications, including: pipeline steel pipes, heat engineering equipment steel pipes, mechanical industry steel pipes, oil and geological drilling steel pipes, vessel steel pipes, chemical industry steel pipes, and steel pipes for special uses.
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 Protection in Compliance with GB/T23257-2009 "Technical Standard for Polyethylene External Coating of Buried Steel Pipelines"
Corrosion-resistant coating rust removal standard: Steel pipe outer surface blasting 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 the service life of the pipes but also manifest in the following aspects:
1. Combine the mechanical strength of steel pipes with the corrosion resistance of plastics.
2. The outer wall coating is over 2.5mm thick, providing resistance to scratches and impacts.
3. Low wall friction coefficient, 0.0081-0.091, reduces energy consumption.
4. Interior walls meet national hygiene standards.
5. The inner wall is smooth and resists scaling, featuring self-cleaning capabilities.
