1Cr5Mo seamless steel pipe is a medium-alloy heat-resistant steel with good hydrogen corrosion resistance at high temperature.
In the atmospheric and vacuum devices for processing high-sulfur crude oil, 1Cr5Mo seamless steel pipes are mainly used for the bottom pipelines of atmospheric towers and vacuum towers, the furnace tubes of atmospheric furnaces and vacuum furnaces, the atmospheric oil transfer line and the vacuum The high-speed section of the oil transfer line and other high-temperature sulfur-containing oil and gas pipelines.
In catalytic cracking units, 1Cr5Mo seamless steel pipes are mainly used for high-temperature oil slurry, catalyst and oil refining pipelines, as well as other high-temperature sulfur-containing oil and gas pipelines.
In the delayed coking unit, 1Cr5Mo seamless steel pipe is mainly used for the high-temperature feed pipe at the bottom of the coke tower and the high-temperature oil and gas pipe at the top of the tower, the furnace tube of the coking furnace, the bottom pipe of the fractionation tower, and other high-temperature sulfur-containing oil products. pipeline.
2. Operating temperature:
The applicable working medium of 1Cr5Mo seamless steel pipe is water, steam, hydrogen, sulfur-containing oil, etc. If it is used for water vapor, its maximum working temperature is 650°C; when it is used for working medium such as sulfur-containing oil, it has good performance of high temperature sulfur corrosion resistance, and is often used in high temperature sulfur corrosion conditions of 288~550°C Down.
1Cr5Mo seamless steel pipe is generally ferrite + pearlite structure. However, if the heat treatment is improper, especially when the cooling rate is too fast, it is easy to produce martensitic structure.
Heat treatment method: the heat treatment method of 1Cr5Mo alloy pipe generally adopts annealing method. The manufacture of pipeline components adopts normalizing + tempering.
heat treatment process
(1) Normalizing treatment. Heat the furnace at 300°C/h (cold furnace at 200°C/h) to 970°C, hold for 2.5-4 min/mm, and then air cool to below 300°C.
(2) Tempering treatment. When the heating temperature reaches 680°C, keep the temperature constant for 2.5~4 min/mm, then turn off the power, cool in the furnace to below 300°C, and then air-cool.
(3) Annealing treatment. The temperature was raised at 200°C per hour. After the temperature rises to 850°C, keep it warm for 2.5~4 min/mm, and then cool it in the furnace.
Executive standard
GB9948-2006 Standard for seamless steel pipes for petroleum cracking
GB6479-2000 Standard for Seamless Steel Tubes for High Pressure Fertilizer Equipment
Zhengde hot-rolled seamless steel pipe is a long strip of steel with a hollow section and no joints around it. The steel pipe has a hollow cross-section and is widely used as a pipeline 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, seamless steel pipe is lighter in weight when the bending and torsional strength is the same. It is an economical section steel and is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes and automobile transmission shafts. , bicycle racks and steel scaffolding used in building construction, etc. The use of seamless steel pipes to manufacture ring parts can improve the utilization rate of materials, simplify the manufacturing process, save materials and processing hours, such as rolling bearing rings, jack sets, etc., which have been widely used in steel pipes. Hot-rolled seamless steel pipe is also an indispensable material for various conventional weapons. Gun barrels, barrels, etc. must be made of steel pipes.
thick
Φ |
3 |
3.5 |
4 |
4.5 |
5 |
5.5 |
6 |
6.5 |
7 |
8 |
8.5 |
9 |
10 |
12 |
32 |
2.146 |
2.46 |
2.762 |
3.052 |
3.329 |
3.594 |
3.847 |
4.088 |
|
|
|
|
|
|
38 |
2.589 |
2.978 |
3.354 |
3.718 |
4.069 |
4.408 |
4.735 |
5.049 |
|
|
|
|
|
|
42 |
2.885 |
3.323 |
3.749 |
4.162 |
4.562 |
4.951 |
5.327 |
5.691 |
|
|
|
|
|
|
45 |
3.107 |
3.582 |
4.044 |
4.495 |
4.932 |
5.358 |
5.771 |
6.172 |
|
|
|
|
|
|
50 |
3.477 |
4.014 |
4.538 |
5.049 |
5.549 |
6.036 |
6.511 |
6.973 |
7.423 |
8.286 |
8.699 |
|
|
|
54 |
3.773 |
4.359 |
4.932 |
5.493 |
6.042 |
6.578 |
7.103 |
7.614 |
8.114 |
9.075 |
9.538 |
|
|
|
57 |
3.995 |
4.618 |
5.228 |
5.826 |
6.412 |
6.985 |
7.546 |
8.095 |
8.632 |
9.667 |
10.167 |
|
|
|
60 |
4.217 |
4.877 |
5.524 |
6.159 |
6.782 |
7.392 |
7.99 |
8.576 |
9.149 |
10.259 |
10.796 |
|
|
|
63.5 |
4.476 |
5.179 |
5.869 |
6.548 |
7.214 |
7.867 |
8.508 |
9.137 |
9.754 |
10.95 |
11.529 |
|
|
|
68 |
4.809 |
5.567 |
6.313 |
7.047 |
7.768 |
8.477 |
9.174 |
9.858 |
10.53 |
11.838 |
12.473 |
|
|
|
70 |
4.957 |
5.74 |
6.511 |
7.269 |
8.015 |
8.749 |
9.47 |
10.179 |
10.876 |
12.232 |
12.892 |
13.539 |
14.797 |
17.164 |
73 |
5.179 |
5.999 |
6.807 |
7.602 |
8.385 |
9.156 |
9.914 |
10.66 |
11.394 |
12.824 |
13.521 |
14.205 |
15.537 |
18.052 |
76 |
5.401 |
6.258 |
7.103 |
7.935 |
8.755 |
9.563 |
10.358 |
11.141 |
11.912 |
13.416 |
14.15 |
14.871 |
16.277 |
18.94 |
89 |
6.363 |
7.38 |
8.385 |
9.378 |
10.358 |
11.326 |
12.281 |
13.225 |
14.156 |
15.981 |
16.875 |
17.756 |
19.483 |
22.787 |
108 |
7.768 |
9.02 |
10.259 |
11.486 |
12.701 |
13.903 |
15.093 |
16.27 |
17.436 |
19.729 |
20.858 |
21.973 |
24.168 |
28.41 |
133 |
|
11.178 |
12.725 |
14.261 |
15.783 |
17.294 |
18.792 |
20.278 |
21.751 |
24.662 |
26.098 |
27.522 |
30.334 |
35.809 |
159 |
|
13.422 |
15.29 |
17.146 |
18.989 |
20.821 |
22.639 |
24.446 |
26.24 |
29.791 |
31.548 |
33.293 |
36.746 |
43.503 |
219 |
|
18.601 |
21.209 |
23.805 |
26.388 |
28.959 |
31.517 |
34.064 |
36.598 |
41.629 |
44.126 |
46.61 |
51.543 |
61.259 |
273 |
|
23.262 |
26.536 |
29.797 |
33.046 |
36.283 |
39.508 |
42.72 |
45.92 |
52.283 |
55.445 |
58.596 |
64.86 |
77.24 |
325 |
|
27.75 |
31.665 |
35.568 |
39.458 |
43.337 |
47.202 |
51.056 |
54.897 |
62.542 |
66.346 |
70.137 |
77.684 |
92.629 |
355 |
|
|
|
38.897 |
43.158 |
47.406 |
51.641 |
55.865 |
60.076 |
68.46 |
72.634 |
76.796 |
85.082 |
101.507 |
377 |
|
|
|
41.339 |
45.871 |
50.39 |
54.897 |
59.391 |
63.873 |
72.801 |
77.246 |
81.679 |
90.508 |
108.018 |
426 |
|
|
|
46.777 |
51.913 |
57.036 |
62.147 |
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 |
104.54 |
115.909 |
138.499 |
530 |
|
|
|
|
|
|
|
83.917 |
90.286 |
102.987 |
109.319 |
115.638 |
128.24 |
153.296 |
630 |
|
|
|
|
|
|
|
99.947 |
107.549 |
122.716 |
130.281 |
137.833 |
152.902 |
182.89 |
Our Advantages
Three-roll pipe mill
The seamless steel pipe produced by the three-roll mill for hot-rolling seamless steel pipe has high precision. Because of the cross-rolling with the mandrel, the rolling action is repeated many times in one pass, which greatly improves the accuracy of the wall thickness and is not easy to produce. Defects such as scratches, ears, and green lines; the flexibility in production is large, and the pass size can be changed with the help of the clutch of the roll.
Adequate inventory
Standing inventory of carbon seamless tubes, seamless special-shaped tubes, alloy seamless tubes, precision tubes. Various types of seamless steel pipes with a specification of 5-426*0.5-60mm and a length of 2-16m. The cold-rolled precision bright tubes produced by our factory have smooth appearance, uniform wall thickness, no oxide layer, and high precision. The inner hole of the steel pipe can be divided into round type, spline type, plum blossom type, etc. It is widely used in automobiles, motorcycles, electric power, petrochemicals, ships, aerospace, bearings, pneumatic components, oil cylinders, boiler equipment, medical equipment, fitness equipment and other industries.
Attention to detail
No matter how to choose the hot-rolled seamless steel pipe, its quality cannot be ignored. It must be noted that there should be no defects on the surface, such as small cracks or scars, etc., and that the thickness of the pipe wall is the same to ensure uniformity. The physical comparison is still very important. Only after the basic comparison of the physical objects is done, can the steel pipes that meet the needs be selected. The processing technology of each seamless steel pipe is different, which will also affect its application field. Now it is generally processed by cold drawing and hot rolling, and the processing effect of the two and the application of steel pipes will also have certain differences.
Applicable scene
Hot-rolled seamless pipes specifically include low and medium pressure boiler steel pipes, high-pressure boiler steel pipes, seamless steel pipes for ships, petroleum cracking steel pipes, seamless steel pipes for high-pressure fertilizer equipment, oil jacket steel pipes, pipeline steel pipes, hollow sucker rods, and ordinary fluid steel pipes. , structural seamless steel pipes and imported alloy steel pipes, etc., with rich varieties and complete specifications, widely used in petroleum, chemical, electric power, boilers, ships, machinery and other industries, and have been sold all over the world.
Quality first: production and inspection in strict accordance with production standards;
Price advantage: discounts based on real market prices;
Transaction security: There will be no loss of customer funds;
After-sales guarantee: the customer's problem is our problem;
Long-term cooperation: quality assurance, price advantage, sincere service can last for a long time.
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Company Profile
Shandong Zhengde Metal Manufacturing Co., Ltd. is a production and sales company integrating hot-rolled steel coils, cold-rolled steel coils, galvanized steel coils, color-coated steel coils, section steel, steel pipes, steel wires, metal mesh, stainless steel, aluminum, copper and other metal products integrated large enterprises. Five production and sales bases have been formed in Binzhou, Liaocheng, Wuxi, Tianjin, Jinan and Tai'an, with more than 100 production lines, 4 nationally recognized laboratories, 2 technical engineering centers, and 5 enterprise technology centers. Products are exported to more than 50 countries and regions such as North America, South America, Europe, Africa, Oceania, Middle East, and Southeast Asia.
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