Large Diameter Square Tube
Large-diameter square pipes and steel pipes with hollow cross-sections are used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and certain solid materials. Compared with solid steel such as round steel, steel pipe has a lighter weight when the bending and torsion strength is the same. It is a kind of economical cross-section steel, which is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile drive shafts, and bicycles. Scaffolding and steel scaffolding used in building construction. The use of steel pipes to manufacture ring-shaped parts can increase the utilization rate of materials, simplify the manufacturing process, and save materials and processing man-hours. For example, rolling bearing rings, jack sleeves, etc., have been widely manufactured with steel pipes. Steel pipes are also an indispensable material for various conventional weapons, and barrels and barrels are all made of steel pipes. According to different cross-sectional area shapes, steel pipes can be divided into round pipes and special-shaped pipes. Since the circle area is the largest under the condition of the same circumference, more fluid can be transported with a circular tube. In addition, when the ring section is subjected to internal or external radial pressure, the force is relatively uniform. Therefore, most steel pipes are round pipes. However, round pipes also have certain limitations. For example, under the condition of plane bending, round pipes are not as good as square. Rectangular pipes have higher bending strength. Square and rectangular pipes are commonly used in some agricultural machinery frameworks, steel and wood furniture, etc. According to different purposes, special-shaped steel pipes with other cross-sectional shapes are required.
1. Large-diameter square pipe for structure (GB/T8162-1999) is a large-diameter square pipe for general structure and mechanical structure.
2. Large-diameter square pipe for fluid transportation (GB/T8163-1999) is a general large-diameter square pipe used to transport water, oil, gas and other fluids.
3. Large-diameter square tubes for low and medium pressure boilers (GB3087-1999) are used to manufacture superheated steam tubes for low and medium pressure boilers of various structures, boiling water tubes and superheated steam tubes for locomotive boilers, large smoke tubes, small smoke tubes and arches High-quality carbon structural steel hot-rolled and cold-drawn (rolled) large-diameter square pipes for brick pipes.
4. Large-diameter square tubes for high-pressure boilers (GB5310-1995) are high-quality carbon steel, alloy steel, and stainless heat-resistant steel large-diameter square tubes for the heating surface of high-pressure and above water-tube boilers.
5. The high-pressure large-diameter square pipe for fertilizer equipment (GB6479-2000) is a high-quality carbon structural steel and alloy steel large-diameter square pipe suitable for chemical equipment and pipelines with a working temperature of -40~400℃ and a working pressure of 10~30Ma. Tube.
6. Large-diameter square pipes for petroleum cracking (GB9948-88) are large-diameter square pipes suitable for furnace tubes, heat exchangers and pipelines in petroleum refineries.
7. Steel pipes for geological drilling (YB235-70) are steel pipes used for core drilling by geological departments. They can be divided into drill pipes, drill collars, core pipes, casing pipes and sedimentation pipes according to their uses.
8. Large-diameter square pipe for diamond core drilling (GB3423-82) is a large-diameter square pipe used for diamond core drilling, core rods, and casing.
9. Petroleum drilling pipe (YB528-65) is a large-diameter square pipe that is thickened inside or outside at both ends of oil drilling. Steel pipes are divided into two types: wire and non-wired. Wired pipes are connected by joints, and non-wired pipes are connected with tool joints by butt welding.
10. Carbon steel large-diameter square pipes for ships (GB5213-85) are carbon steel large-diameter square pipes used in the manufacture of Class I pressure piping systems, Class II pressure piping systems, boilers and superheaters. The working temperature of carbon steel large-diameter square tube wall does not exceed 450℃, and that of alloy steel large-diameter square tube wall exceeds 450℃.
11. Large-diameter square tube for automobile half-shaft casing (GB3088-82) is a high-quality carbon structural steel and alloy structural steel hot-rolled large-diameter square tube for manufacturing automobile half-shaft casing and drive axle axle tube.
12. High-pressure fuel pipe for diesel engine (GB3093-2002) is a cold-drawn large-diameter square pipe for manufacturing high-pressure pipe of diesel engine injection system.
13. The precision inner diameter large diameter square tube for hydraulic and pneumatic cylinders (GB8713-88) is a cold drawn or cold rolled precision large diameter square tube with a precise inner diameter for the manufacture of hydraulic and pneumatic cylinders.
14. Cold-drawn or cold-rolled precision large-diameter square pipe (GB3639-2000) is used for mechanical structure, hydraulic equipment with high dimensional accuracy and good surface finish. Choosing precision large-diameter square tubes to manufacture mechanical structures or hydraulic equipment can greatly save machining man-hours, increase material utilization, and at the same time help improve product quality.
15. Structural stainless steel large-diameter square pipe (GB/T14975-2002) is a hot-rolled stainless steel made of corrosion-resistant pipes and structural parts and parts that are widely used in chemical, petroleum, textile, medical, food, machinery and other industries. (Extruded, expanded) and cold drawn (rolled) large-diameter square tubes.
16. The stainless steel large-diameter square tube for fluid transportation (GB/T14976-2002) is a hot-rolled (extruded, expanded) and cold-drawn (rolled) large-diameter square tube made of stainless steel for fluid transportation.
17. Special-shaped large-diameter square pipe is a general term for large-diameter square pipes with cross-sectional shapes other than round pipes. According to the different shape and size of the steel pipe section, it can be divided into equal wall thickness special-shaped large-diameter square pipe (code D), unequal wall thickness special-shaped large-diameter square pipe (code BD), variable diameter special-shaped seamless steel pipe (code BJ) ). Special-shaped large-diameter rectangular tubes are widely used in various structural parts, tools and mechanical parts. Compared with round pipes, special-shaped pipes generally have larger moments of inertia and section modulus, and have greater bending and torsion resistance, which can greatly reduce structural weight and save steel.
Large-diameter square pipes are widely used as pipelines for conveying fluids, such as pipelines for conveying oil, natural gas, gas, water and certain solid materials. Large-diameter square pipes are also widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile drive shafts, bicycle frames, and steel scaffolding used in construction.
Large-diameter square pipe part specification sheet product part parameter (GB/T3094-2000)
|
Side length/mm |
Wall thickness/mm |
Section area/cm2 |
Theoretical weight/kg/M |
Moment of inertia/cm4 |
Section modulus/cm3 |
|
40 |
3.5 |
4.9 |
3.85 |
11.16 |
5.58 |
|
50 |
4 |
7.09 |
5.56 |
25.56 |
10.22 |
|
60 |
5 |
10.58 |
8.3 |
54.57 |
18.19 |
|
70 |
5 |
12.58 |
9.87 |
90.26 |
25.79 |
|
80 |
5 |
14.58 |
11.44 |
138.9 |
34.72 |
|
92 |
5 |
16.98 |
13.33 |
217.1 |
47.19 |
|
100 |
5 |
18.58 |
14.58 |
282.8 |
56.57 |
|
108 |
5 |
19.96 |
15.67 |
346.99 |
72.14 |
|
120 |
5 |
22.36 |
17.55 |
485.47 |
89.79 |
|
110 |
7 |
28.01 |
21.99 |
503.4 |
91.54 |
|
150 |
6 |
33.63 |
26.4 |
1145.91 |
168.85 |
|
180 |
16 |
98.37 |
77.22 |
4252.42 |
590.55 |
|
200 |
8 |
59.79 |
46.94 |
3621 |
400.25 |
|
250 |
10 |
93.42 |
73.33 |
8841.87 |
781.73 |
|
16 |
162.37 |
127.46 |
18462.79 |
1521.42 |
200.65 |
