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.
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 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.
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 are used for the manufacture of pipelines, vessels, equipment, pipe fittings, and steel structures.
Standard
| 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 |
| 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 |
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.
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.
The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
