Structure Steel pipes

Structure Steel pipes

Structural steel pipes are commonly used in various construction and infrastructure projects due to their strength, durability, and versatility.

Structure Steel pipes are intended for mechanical and pressure applications and is also acceptable for ordinary uses in steam, water, gas, and air lines. With its enhanced cross-sectional efficiency, it makes a major contribution to lightweight, economic structural design. In addition, its attractive round appearance facilitates elegant and beautiful structures.

What is structural steel pipe?

In general, structural pipe is a type of steel construction pipe that meets certain standards of chemical composition and mechanical properties. This pipe can be used for a wide variety of structural applications and there are variety of types of structural pipe available.

Structural steel pipes are manufactured according to various standards and specifications, such as ASTM A500 and ASTM A513. These standards ensure the pipes' quality, dimensional accuracy, and mechanical properties.

ASTM A53 standard specifications

ASTM A53 Standard Spec. for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ASTM A53 / A53M Standard covers seamless and welded black and hot-dipped galvanized steel pipe in NPS 1/8 to NPS 26.

Steel grade:

Application: for the manufacture of pipelines, containers, equipment, fittings and mechanical structures.

Types of steel pipe for machine structures

Steel pipe application in structure engineering is generated in the carbon steel smelting defect smelting and casting process, such as segregation, non-metallic inclusions, porosity, shrinkage and cracks.

Product name Manufacturing method Main features and applications
Carbon Steel Pipe for Machine Structures These products normally conform to JIS G 3445 Carbon Steel Tubes for Machine Structural Purposes.  We also manufacture such carbon steel pipe products using materials that conform to JIS G 4051 Steel for Machine Structural Purposes, as well as to other standards and specifications. These steel pipe products are used in machines, automobiles, bicycles, furniture, tools and utensils, and other machine parts.
Alloy Steel Pipe for Machine Structures These products normally conform to JIS G 3441 Alloy Steel Tubes for Machine Structure Purposes, but we also manufacture such alloy steel pipe products using materials that conform to JIS G 4053 Low-Alloyed Steels for Machine Structural Use, as well as to other standards and specifications. These steel pipe products are used in machines, automobiles, and other machine parts.
ERW Carbon Steel Pipe for Machine Structures These products are manufactured based on JIS G 3472 Electric Resistance Welded Carbon Steel Tubes for Automobile Structural Purposes. They are used mainly in automotive machine parts.
High-Strength Steel Pipe for Machine Structures These steel pipe products, include seamless steel pipe, ERW steel pipe, and hot finished ERW steel pipe. They are used in marine structures and cylinders for their excellent weldability and low-temperature properties, and in machine parts for reduced weight and increased strength.

Tubes for structure

Tubes for structure are used for the manufacture of pipelines, vessels, equipment, pipe fittings, and steel structures.


Usage OD(mm) WT(mm) Steel Grade Standard/ Specification Aplication Fields 
Structural Pipe 42-760 4-120 20#,35#,45#,Q345A/B/C/D,Q390, Q420,25Mn,27SiMn etc. GB/T 8162 General structural and mechanical pipe
Vehicle Pipe 45-245 4-35 20Mn2,SAE1527,MZ410R, MZ530R,30Mn2,40Cr,45Mn2 etc. Technical agreement, YB/T5035 Pipe used for automobile axle and automobile semi-shaft
Mold Pipe &Tube DN200-DN1200 21CrMo10,21CrMo10-2 etc. Q/OHAD030, technical agreement Centrifugal graphite casting-iron pipe mold
Military Pipe 42-760 4-120 30Cr,40Cr,35CrNi1MoA etc. National military standard, agreement Pipe for military use
Geology Drilling Pipe &Tube 42-133 DZ40,DZ55,STM-R780,DZ60 etc. Q/OHAD006, GB/T 9808, agreement Drilling pipe
Hydraulic Support Pipe 42-760 4-120 20#,35#,45#,27SiMn,30MnNbRE, 30CrMnSi,30CrMnSiA etc. GB/T 17396, technical agreement Making hydraulic equipment for coal mine exploitation and hydraulic cylinder and piston for truck crane
Fluid Transmission Pipe & Tube 42-760 4-120 20#,Q345,Q390 etc. GB/T 8163, technical agreement Pipe & tube used for fluid transmission

ASTM standards for Structural tubing

Abbr. Corresponding Application
A500 ASTM A500 / A500M Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes
A501 ASTM A501 / A501M Specification for Hot-Formed Welded and Seamless Carbon Steel Structural Tubing
A847 ASTM A847 / A847M Specification for Cold-Formed Welded and Seamless High Strength, Low Alloy Structural Tubing with Improved Atmospheric Corrosion Resistance
A618 ASTM A618 / A618M Specification for Hot-Formed Welded and Seamless High-Strength Low-Alloy Structural Tubing

What are the most popular usages of structural steel pipe?

Nowadays, structural steel pipes are used in almost every sector. This material became immensely popular due to its durability, resistance power and load-bearing capacity. Experts use steel pipes in various fields such as manufacturing, structural and transportation.

The structural steel fabrication process involves combining various shapes to manufacture predefined sizes and shapes to assemble industrial tools, equipment and other products.

  1. Transportation: Structural steel pipes are commonly used to transport substances from one place to another due to their inherent strength and durability.
  2. Construction: Structural steel pipes are widely used in construction projects for various applications, such as columns, beams, trusses, and other load-bearing components. They provide structural support and contribute to the overall stability and integrity of buildings and infrastructure.
  3. Industrial Equipment: Structural steel pipes are used in the fabrication of industrial equipment and tools. They are shaped and manufactured to provide better support and structural integrity for the equipment.
  4. Infrastructure: Structural steel pipes play a crucial role in infrastructure projects, including bridges, tunnels, and stadiums. They provide the necessary strength and support to withstand heavy loads and ensure the safety and longevity of these structures.
  5. Agricultural Infrastructure: Structural steel pipes are also used in agricultural infrastructure, such as barns, storage facilities, and irrigation systems. They offer durability and versatility for various agricultural applications.

【H】 Ceramic lined pipe

Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.

【H】 Cast basalt lined steel pipe

Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.

【H】 Ceramic Tile Lined Pipes

Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.

【H】 Rare earth alloy wear-resistant pipe

The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.

【H】 Tubes Erosion Shields

Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.

【H】 ASTM A213 T91 Alloy Tube

The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.

Ni-Hard Wearback Pipes Ni-Hard Wearback Pipes