According to the provisions of GB2102-88. There are three kinds of steel pipe packaging: bundling, crating, oiled bundling or oiled crating. Steel pipe is a kind of long steel with hollow cross-section and no seams around. Steel pipe has a hollow cross-section, a large number of pipelines used to transport 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 is lighter in weight when the bending and torsion strength is the same, and it is a kind of economic cross-section steel, which is widely used in the manufacture of structural and mechanical parts, such as oil drilling rods, automobile driveshafts, bicycle frames, and steel scaffolding used in building construction. Steel pipe manufacturing ring-shaped parts, can improve material utilization, simplify the manufacturing process, save materials and processing time, such as rolling bearing rings, jack sets, etc., has been widely used in steel pipe to manufacture. Steel pipe or a variety of conventional weapons indispensable materials, gun barrels, gun barrels, etc. to steel pipe to manufacture. Steel pipe according to the shape of the cross-sectional area of different can be divided into round pipe and shaped pipe. Since the circular area is the largest under the condition of equal perimeter, more fluid can be transported with circular pipe. In addition, the circular cross-section is more uniformly stressed when subjected to internal or external radial pressure, therefore, the vast majority of steel pipes are round pipes.
However, the round tube also has certain limitations, such as under the conditions of plane bending, round tube is not as strong as the square, rectangular tube bending strength, some of the skeleton of agricultural machinery, steel and wood furniture, etc. are commonly used square, rectangular tube. According to different uses also need to have other cross-sectional shape of the shaped steel pipe.
1. Structural seamless steel pipe (GB/T8162-2008) is used for general structure and mechanical structure of seamless steel pipe.
2. Seamless steel pipe for fluid transportation (GB/T8163-2008) is a general seamless steel pipe used for the transportation of water, oil, gas and other fluids.
3. Seamless Steel Pipe for Low and Medium Pressure Boiler (GB3087-2008) is the hot rolled and cold drawn (rolled) seamless steel pipe of high quality carbon structural steel used for manufacturing superheated steam pipe, boiling water pipe for low and medium pressure boilers of various structures and superheated steam pipe, big smoke pipe, small smoke pipe and arch brick pipe for locomotive boilers.
4. High-pressure boiler seamless steel pipe (GB5310-2008) is used in the manufacture of high-pressure and above the pressure of water pipe boiler heating surface with high-quality carbon steel, alloy steel and stainless heat-resistant steel seamless steel pipe.
5. High-pressure seamless steel pipe for chemical fertilizer equipment (GB6479-2000) is a high-quality carbon structural steel and alloy steel seamless steel pipe for chemical equipment and pipelines with working temperature of -40~400℃ and working pressure of 10~30Ma.
6. Seamless steel pipe for petroleum cracking (GB9948-88) is a seamless steel pipe for furnace pipe, heat exchanger and pipeline of petroleum refinery.
7. Steel pipe for geological drilling (YB235-70) is a steel pipe used for core drilling by geological departments.
8. Seamless steel pipes for diamond core drilling (GB3423-82) are seamless steel pipes for drill pipes, core pipes and casing used for diamond core drilling.
9. Oil drilling pipe (YB528-65) is a seamless steel pipe used for oil drilling with thickening inside or outside at both ends. Steel pipe is divided into two kinds of car wire and not car wire, car wire pipe with joints coupling, not car wire pipe with butt welding method and tool joints coupling.
10. Carbon steel seamless steel pipe for ships (GB5213-85) is the manufacture of ships I pressure-resistant pipe system, Ⅱ pressure-resistant pipe system, boilers and superheaters with carbon steel seamless steel pipe. Carbon steel seamless steel pipe wall operating temperature does not exceed 450 ℃, alloy steel seamless steel pipe wall operating temperature exceeds 450 ℃.
11. Automotive half shaft casing seamless steel pipe (GB3088-82) is the manufacture of automotive half shaft casing and drive axle housing axle tube with high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel pipe.
12. High-pressure oil pipe for diesel engine (GB3093-86) is a cold-drawn seamless steel pipe for manufacturing high-pressure pipe for diesel engine injection system.
13. Hydraulic and pneumatic cylinder barrel with precision internal diameter seamless steel tube (GB8713-88) is the manufacture of hydraulic and pneumatic cylinder barrel with precision internal diameter size of cold-drawn or cold-rolled precision seamless steel tube.
14. Cold-drawn or cold-rolled precision seamless steel pipe (GB3639-83) is used for mechanical structures, hydraulic equipment with high dimensional accuracy and good surface finish of cold-drawn or cold-rolled precision seamless steel pipe. Selection of precision seamless steel pipe manufacturing mechanical structure or hydraulic equipment, etc., can greatly save machining hours, improve the material utilization rate, at the same time conducive to improving product quality.
15. Structural stainless steel seamless steel pipe (GB/T14975-1994) is widely used in chemical, petroleum, textile, medical, food, machinery and other industries, corrosion-resistant piping and structural components and parts of the stainless steel made of hot-rolled (extrusion, expansion) and cold-drawn (rolled) seamless steel pipe.
16. Stainless steel seamless pipes for fluid transportation (GB/T14976-1994) are hot rolled (extruded, expanded) and cold drawn (rolled) seamless steel pipes made of stainless steel used for the transportation of fluids.
17. Shaped seamless steel pipe is in addition to the round tube of other cross-sectional shape of the seamless steel pipe. According to the different dimensions of the cross-section shape of the pipe can be divided into equal wall thickness profiled seamless steel pipe (code D), unequal wall thickness profiled seamless steel pipe (code BD), variable diameter profiled seamless steel pipe (code BJ). Profiled seamless steel pipe is widely used for various structural parts, tools and mechanical parts. Compared with round pipe, profiled pipe generally have larger moment of inertia and section modulus, have larger bending and torsion resistance, can greatly reduce the weight of the structure, saving steel.
Weight reference table Unit: Kg/m Wall Thickness Diameter 3 3.5 4 4.5 5 5.5 6 32 2.146 2.460 2.762 3.052 3.329 3.594 3.847 38 2.589 2.978 3.354 3.718 4.069 4.408 4.735 42 2.885 3.323 3.749 4.162 4.562 4.951 5.327 45 3.107 3.582 4.044 4.495 4.932 5.358 5.771 50 3.477 4.014 4.538 5.049 5.549 6.036 6.511 54 3.773 4.359 4.932 5.493 6.042 6.578 7.103 57 3.995 4.618 5.228 5.826 6.412 6.985 7.546 60 4.217 4.877 5.524 6.159 6.782 7.392 7.990 63.5 4.476 5.179 5.869 6.548 7.214 7.867 8.508 68 4.809 5.567 6.313 7.047 7.768 8.477 9.174 70 4.957 5.740 6.511 7.269 8.015 8.749 9.470 73 5.179 5.999 6.807 7.602 8.385 9.156 9.914 76 5.401 6.258 7.103 7.935 8.755 9.563 10.358 89 6.363 7.380 8.385 9.378 10.358 11.326 12.281 108 7.768 9.020 10.259 11.486 12.701 13.903 15.093 133 11.178 12.725 14.261 15.783 17.294 18.792159 13.422 15.290 17.146 18.989 20.821 22.639219 18.601 21.209 23.805 26.388 28.959 31.517273 23.262 26.536 29.797 33.046 36.283 39.508325 27.750 31.665 35.568 39.458 43.337 47.202355 38.897 43.158 47.406 51.641 377 41.339 45.871 50.390 54.897 426 46.777 51.913 57.036 62.147 450 480 530 630 Unit: Kg/m Wall Thickness Outer Diameter 6.5 7 8 8.5 9 10 12 32 4.088 38 5.049 42 5.691 45 6.172 50 6.973 7.423 8.286 8.699 54 7.614 8.114 9.075 9.538 57 8.095 8.632 9.667 10.167 60 8.576 9.149 10.259 10.796 63.5 9.137 9.754 10.950 11.529 68 9.858 10.530 11.838 12.473 70 10.179 10.876 12.232 12.892 13.539 14.797 17.164 73 10.660 11.394 12.824 13.521 14.205 15.537 18.052 76 11.141 11.912 13.416 14.150 14.871 16.277 18.940 89 13.225 14.156 15.981 16.875 17.756 19.483 22.787 108 16.270 17.436 19.729 20.858 21.973 24.168 28.410 133 20.278 21.751 24.662 26.098 27.522 30.334 35.809 159 24.446 26.240 29.791 31.548 33.293 36.746 43.503 219 34.064 36.598 41.629 44.126 46.610 51.543 61.259 273 42.720 45.920 52.283 55.445 58.596 64.860 77.240 325 51.056 54.897 62.542 66.346 70.137 77.684 92.629 355 55.865 60.076 68.460 72.634 76.796 85.082 101.507 377 59.391 63.873 72.801 77.246 81.679 90.508 108.018 426 67.246 72.332 82.468 87.518 92.555 102.592 122.519 450 71.093 76.475 87.203 92.549 97.882 108.511 129.621 480 75.902 81.654 93.122 98.837 104.540 115.909 138.499 530 83.917 90.286 102.987 109.319 115.638 128.240 153.296 630 99.947 107.549 122.716 130.281 137.833 152.902 182.890