How does the construction industry choose the right steel pipe?

Steel pipe plays an important role in the construction industry,widely used in structural support,pipeline transportation,truss and other fields.The correct selection of steel pipes can not only improve building safety,but also reduce project costs and improve construction efficiency.This paper will analyze how to correctly select steel pipes in the construction industry from the aspects of steel pipe type,material selection standards,specifications,application scenarios and precautions.

Common types of steel pipes used in construction

1.Seamless Steel Pipe

✅Features:no weld,high strength,excellent pressure resistance.

✅Application scenarios:load-bearing structures of high-rise buildings,high-pressure pipelines,Bridges,etc.

✅Advantages:high temperature resistance,corrosion resistance,strong overall stability.

✅Disadvantages:high manufacturing cost,the price is more expensive.

2.Welded Steel Pipe

✅Features:steel coil welding,low production cost.

✅Application scenario:low pressure fluid transport,scaffolding,building support structure.

✅Advantages:low cost,high production efficiency,rich specifications.

✅Disadvantages:the strength of the welded part is lower than that of the seamless steel pipe,and there may be welding defects.

3.Galvanized Steel Pipe

✅Features:surface galvanized layer,improve corrosion resistance.

✅Application scenario:water supply and drainage system,HVAC pipeline,guardrail,scaffolding,etc.

✅Advantages:strong anti-corrosion ability,suitable for humid environment.

✅Disadvantages:cold galvanized layer easy to fall off,hot dip galvanized cost is higher.

4.Structural Steel Pipe

✅Features:Used for building structural support,usually made of high strength low alloy steel.

✅Application scenario:building frame,bridge,floor column,curtain wall support.

✅Advantages:high strength,excellent seismic performance.

✅Disadvantages:The manufacturing cost is relatively high.

Steel pipe selection standards

International standard

ASTM A53:Welded and seamless steel tubes for fluid transfer and structural support.

ASTM A500:For cold-formed welded steel pipes,widely used in building structures.

EN 10219(European standard):cold-formed structural steel pipes.

EN 10210(European standard):Thermoformed structural steel tubes for load-bearing structures.

China National Standard(GB)

GB/T 8162:Seamless steel pipe for construction.

GB/T 3091:Welded steel pipe for low pressure fluid transport.

GB/T 13793:straight welded steel pipe.

GB/T 3094:cold-drawn shaped steel pipe,suitable for special structural requirements.

Steel pipe purchase points

✅Wall thickness selection:thick-wall steel pipe for load-bearing structure and thin-wall pipe for fluid transmission.

✅Diameter selection:large diameter steel pipe is suitable for load-bearing structure,small diameter is suitable for railings,scaffolding,etc.

✅Surface treatment:galvanized steel pipe or sprayed anti-rust paint is recommended for outdoor environment.

✅Quality certification:to ensure that the steel pipe meets international or domestic standards,and has a quality test report.

Steel pipe applications in the construction industry

🏗Tall buildings:thermoformed structural steel tubes according to EN 10210 or ASTM A500,with superior seismic performance.

🌉Bridge engineering:thick wall seamless steel pipe,strong bearing capacity.

🚰Municipal pipe network:galvanized steel pipe,strong corrosion resistance,suitable for long-term fluid transport.

🔩Light building structure:welded steel pipe,low cost,suitable for temporary buildings.

Sum up

When selecting steel pipes in the construction industry,comprehensive consideration should be made according to the steel pipe type,material selection standards,specification requirements and application scenarios.Seamless steel pipe is suitable for high-strength load-bearing structure,welded steel pipe is suitable for general building support,galvanized steel pipe is suitable for anti-corrosion environment,structural steel pipe is suitable for frame structure.In practical applications,the selection of steel pipes that meet the standards can improve project quality,reduce maintenance costs,and improve construction efficiency.