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erw black steel pipe also known as circular welded steel pipe, is a straight seam welded steel pipe made from hot-rolled or cold-rolled steel strips through continuous cold bending and high-frequency welding. It is currently the most produced and widely used economical pipe material.Widely used in structural support, fluid transportation, machinery manufacturing, construction, photovoltaics, guardrails, greenhouses, pipelines and other fields.
Square and rectangular tubes, also known as square and rectangular hollow structural steel sections, are economical cross-section profiles made from hot-rolled or cold-rolled steel strips through cold bending, high-frequency welding, and sizing. High-precision products can also be produced using cold drawing/redrawing processes. They are one of the most widely used profiles in modern steel structures, machinery manufacturing, and construction engineering.
EN 39 HOT DIP GALVANIZED SCAFFOLDING PIPE
EN 39 is a European standard that specifically specifies the dimensions, materials, mechanical properties, and quality requirements for non-alloy carbon steel welded round tubes used in building scaffolding.
ASTM A501 Grade B ERW Structural Tubing
ASTM A501 is a standard for hot-formed shaped welded/seamless carbon structural steel pipes, divided into grades A, B, and C. It has good weldability, moderate cost, and is widely used in construction and general structures.
HOT DIPPED GALVANIZED HOLLOW SECTION
Galvanized steel pipes are steel pipes coated with zinc to reduce the likelihood of rusting. This treatment prevents the steel pipes from corroding. They are widely used in construction, machinery, coal mining, chemical engineering, electric power, railway vehicles, the automotive industry, highways, bridges, and other fields. Owing to their corrosion resistance and good mechanical properties, they are particularly useful in fire protection, electric power, and highway construction.
JIS G 3101 SS400 HOLLOW STRUCTURAL SECTION
SS400 is a general-purpose carbon structural steel under the JIS G 3101 standard, with a core advantage of 400 MPa tensile strength, good weldability/ machinability, and low cost. It is widely used in non-critical structures such as buildings, machinery, and bridges, and is the global mainstream equivalent grade to Q235B, S235JR, and A36.
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